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Патент USA US3095675

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July 2, 1963
3,095,667
L. R. HUFF
ROTATABLE AND TRANSLATABLE ‘DRAWING BOARD
Filed Dec. 15, 1961
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, BY
ATTORNEYS .
July 2, 1963
L, R, HuFF
3,095,667
ROTATABLE AND TRANSLATABLE DRAWING BOARD
Filed D86. 15, 1961
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INVENTOR
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BY
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July 2, 1963
L. R. HUFF
3,095,667 '
ROTATABLE AND TRANSLATABLE DRAWING BOARD
Filed Dec. 15, 1961
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ATTORNEYS .
July 2, 1963
L. R. HUFF
3,095,667
ROTATABLE AND TRANSLATABLE DRAWING BOARD
Filed Dec.
6 Sheets-Sheet 5
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ATTORNEYS.
July 2, 1963
3,095,667
L. R. HU FF
ROTATABLE AND TRANSLATABLE DRAWING BOARD
Filed Dec.- 15, 1961
6 Sheets-Sheet 6
L E 5:. NERHUFF'
INVENTOR
BY
ATTORNEYS .
3,095,667
United States Patent 0 ’"IC€
Patented July 2, 1Q63
1
2
3,095,667
supports the drawing board and the guides in which the
latter travel;
Leslie Royce Hail, 266 Mill St., Westwood, N.J.; Hazel
tion line 5—5 of FIGURE 2 and looking in the direction
of the arrows, showing the rotatable mounting of the
ROTATABLE AND TRANSLATABLE DRAWING
BOARD
FIGURE 5 is a partial sectional view, taken on the sec
Shuman Hull, administratrix of the estate of Leslie
tension roller;
Royce Hu?, deceased
Filed Dec. 15, 1961, Ser. No. 159,581
9 Claims. (Cl. 45-131)
'
FIGURE 6 is a vertical sectional view through one of
the cone clutches at the opposite ends of the horizontal
shaft, which slidably mounts the carriage supporting the
drawing board, taken substantially along the line 6—6
This invention relates to rotatable and translatable
drawing boards. The present invention is an improve
ment over that in my prior Patent No. 2,894,355, entitled
of FIGURE 1 as viewed in the direction indicated by the
arrows;
.
FIGURE 7 is a detail vertical sectional view, taken on
“Endless Paper Roll Type Drafing Board,” issued on
July 14, 1959. In that prior patent there are shown two
the line 7—~7 of FIGURE 3 and looking in the direction
arrangements of drawing boards rotatable about a hori 15 of the arrows, showing two of the quadruple needle bear
ings, which rotatably support the cone clutches in the
zontal axis, two arrangements of drawing boards that are
guide plates;
translatable and three arrangements in which the drawing
FIGURE 8 is a detail vertical sectional view, taken on
paper is slidable over the drawing board.
the section line 8—8 of FIGURE 2 and looking in the
The object of the present invention is to provide a draw
direction of the arrows, showing the rotatable mounting
ing board which is rotatable about a horizontal axis and
of one of the winding rollers;
maintained in any desirable position by means of adjust
FIGURE 9 is a detail horizontal sectional View, taken
able clutches and also translatable to enable the drafts
on the section line 9'——9' of FIGURE 2 and looking in the
man to reach a large area of the drawing board, while
direction of the arrows, showing one of the ‘BI-IDS for re
seated in an ordinary chair.
leasably holding the winding rollers in place;
Another object of the present invention is to provide
FIGURE 10 is a top plan view showing the two parallel
screws for moving the carriage which supports the draw
ing board outwardly toward the rear of the desk;
a drawing board on which the drawing paper is trained
over a pair of winding rollers and a tension roller to pro
vide for moving the drawing paper across the drawing
FIGURE 11 is a transverse sectional view, taken on
board.
A further object of the present invention is to provide 30 the section line 11-11 of FIGURE 10 and looking in
the direction of the arrows, showing one of the parallel
a drawing board with an arrangement of winding and
screws for moving the carriage which supports the draw
tension rollers for moving the drawing paper across the
ing board;
‘
board and in which the rollers are positioned within easy
FIGURE 12 is a detail longitudinal sectional view,
reach of the draftsman for right or left handed operation.
taken on the section line 12-—-12 of FIGURE 10 and look
An additional object of the present invention is to
ing in the direction of the ‘arrows, showing the clutch
provide a drawing board supported on a slidable carriage
shaft housing and one of the slidable blocks, which are
having an arrangement of winding-and tension rollers for
moved by the parallel screws;
moving the paper across the board, in which the rollers
FIGURE 13 is a detail transverse sectional view, taken
on the section line ‘13-—113 of FIGURE 10 and looking in
the direction of the arrows, showing a modi?cation of
the needle roller bearings, which mount the clutch hous
are removable from the carriage and can be relocated or
placed in storage, either empty or with paper on same.
Still another object of the present invention is to pro~
vide a drawing board supported on a slidable carriage
having an arrangement of winding and tension rollers for
moving the paper across the drawing board in combina
tion with an elevating means for holding the carriage
and drawing board in a selected elevated position.
ings for linear movement in the transversely positioned
guides;
FIGURE 14 is a detail transverse sectional view, taken
on the section line 14-14011‘ FIGURE 10 and looking in
the direction of the arrows, showing one of the rear
An additional object is the provision of an elevating
mountings, which rotatably support the parallel screws;
means for holding the carriage and drawing board in a
FIGURE 15 is a detail transverse vertical sectional
selected elevated position the carriage with the drawing
view, taken on the section line 15--1‘5 of FIGURE 10
and looking in the direction of the arrows, showing one
board being rotatable around a vertical axis to the draw
ing board.
Still other objects, advantages and improvements will
become {apparent from the following speci?cation, taken
in connection with the accompanying drawings, in which:
of the front mountings which rotatably support the par
allel screws;
FIGURE 16 is a top plan view showing a modi?cation
FIGURE 1 is a topplan view of a desk mounting a 55 in which the carriage supporting the drawing board is
mounted for movement transversely of the desk by a slide,
which is secured to the carriage, and a guide, Which is
secured to the desk;
FIGURE 17 is a top plan view, similar to FIGURE 16,
showing a square drawing board and slides on the opposite
sides of the carriage supporting same, which slides co
drawing board in accordance with the present invention,
with the desk broken away on the opposite sides of the
drawing board to show the locations of the winding and
tension rollers;
FIGURE 2 is a transverse sectional view, taken on the
section line 2--2 of FIGURE 1 and looking in the direc
tion of the arrows, showing the releasable mountings for
the winding rollers ‘and the adjusting means 'for the ten
sion roller;
FIGURE 3 is a vertical sectional view, similar to FIG
URE 2, showing the carriage which supports the drawing
operate with guides secured to the desk;
FIGURE 18 is a transverse vertical sectional view,
taken on the section line 18-48 of FIGURE 16 and
65
looking in the direction of the arrows, showing a latching
device for holding the carriage supporting the drawing
board in any one of several selected positions;
board shifted forwardly so as to be free of the rear sec
FIGURE 19‘ is a detail longitudinal vertical sectional
tion of the desk and in a position to be revolved around
view, taken on the section line 19-49 of FIGURE 18
70 and looking in the direction of the arrows, showing the
its transverse horizontal axis;
FIGURE 4 is an end elevational view, showing the
details of the latching ‘device and its keeper according to
clutch housings on the opposite sides of the carriage which
FIGURE 18;
3,095,667
FIGURE 20 is a partial end elevational view, taken on
the line 2tl——20 of FIGURE 17, and looking in the direc
tion of the arrows, showing the relative locations of the
slides on the carriage, which supports the drawing board,
and the guides on the top of the desk, in the modi?cation
according to FIGURE 17;
‘I
looking in the direction of the arrows, showing the rear
pivoted mounting for the carriage, which supports the
drawing board;
FIGURE 34 is a side elevational view, similar to FIG
URE 26, but showing the hinged carriage, which supports
and elevates the drawing board, in the lowered position;
FIGURE 35 is a top plan view, taken on the section
FIGURE 21 is also a partial end elevational view, taken
line 35—-35 of FIGURE 34 and looking in the direction
on the line 21—21 of FIGURE 16 and looking in the di
of the arrows, showing the mounting of the carriage,
rection of the arrows, showing the relative locations of
the slides on the carriage, and the guides, which are 10 which supports the drawing board, for rotation about its
vertical axis;
mounted on the top of the desk, in the modi?cation ac
FIGURE 36 is a detail transverse sectional view, taken
cording to FIGURE 16;
on the section line 36——36 of FIGURE 35 and looking in
FIGURE 22 is a horizontal detail sectional view, taken
the direction of the arrows, showing the details of the
on the section line 22—22 of FIGURE 20 and looking in
mounting for the carriage, which supports the drawing
the direction of the arrows, showing the relative locations
board, for rotation about its vertical axis;
of the slides on the carriage, which supports the drawing
FIGURE 37 is a detail transverse sectional view, taken
board, and the guides which are mounted on the top or" the
on the section line 37-—37 of FIGURE 35 and looking in
desk, in the modi?cation according to FIGURE 16;
the direction of the arrows, showing the details of the
FIGURE 23 is a detail vertical sectional view, taken
on the section line 23-23 of FIGURE 22 and looking in 20 slidable mounting for the carriage, which supports the
drawing board, according to FIGURE 35;
the direction of the arrows, also showing the details of
FIGURE 38 is a detail transverse sectional view, taken
the slides on the carriage, which supports the drawing
on the section line 38—38 of FIGURE 35 and looking in
board, and the guides which are mounted on the top of
the direction of the arrows, showing the locking means
the desk;
for securing the rotatable mounting of the carriage,
FIGURE 24 is a fragmentary side elevational view of
the carriage, which supports the drawing board, with cer
tain parts shown in section, showing a modi?ed arrange
ment of the slides on the carriage, which supports the
which supports the drawing board in any selected posi
tion; and
FIGURE 39 is a schematic top plan view, showing that
drawing board, with respect to the winding rollers;
the carriage, which supports the drawing board, must
riage, which supports the drawing board, with certain
vertical axis and into the desired angular position.
FIGURE 25 is a top plan view of the desk and the car 30 ?rst be pulled forward before it can be rotated about its
parts shown in section and showing a carriage elevating
means;
FIGURE 26 is a side elevational view of the carriage,
which supports the drawing board, and a sectional view
of the desk, taken on the section line 26—26 of FIGURE
25 and looking in the direction of the arrows, and also
Referring now to the drawings in detail, and to FIG
URES 1 and 2 in particular, the drawing board and the
vslidable carriage, which supports same, are here shown as
mounted within the parallel sides and over an intermediate
section of a desk. The lower section of the desk may
be of any conventional construction. As shown, the
lower section of the desk is ‘comprised in part by front
corner members 10, which are of angle bar shape. These
FIGURE 27 is a substantially vertical sectional view,
taken on the section line 27—27 of FIGURE 26 and look 40 corner members form legs (not shown) and are spaced
apart longitudinally to provide an open space for the
ing in the direction of the arrows, showing the pivoted end
draftman’s knees. An intermediate wall 11 is positioned
of the elevating means and a detent for latching the car
showing the carriage elevating means;
riage, which supports the drawing board, from sliding
movement;
parallel to the front corner members It} and rear corner
members 12 are also provided. These rear corner mem
FIGURE 28 is a detail side elevational view showing 45 bers 12 are likewise of angle bar construction and form
legs (also not shown) at their bottoms. Side frame mem
bers 13 are provided across the tops of the front corner
detent for latching the carriage taken substantially along
members It) and across the tops of the rear corner mem
the line 2»8—-28 of FIGURE 27 as viewed in the direction
bers 12 for supporting the top. End walls 15 are pro
of the arrows;
vided and are secured over the corner members 10 and
FIGURE 29 is a detail transverse sectional view, taken
12 and against the ends of the intermediate wall 11. A
on the section line 29—29 of FIGURE 25 and looking in
rear wall 16, similar to the end walls 15, is also provided
the direction of the arrows, showing a modi?ed arrange
and is positioned between the rear corner members 12.
ment of one of the cone clutches, which are positioned
Side frame members 14 are mounted on the tops of
between the carriage supporting the drawing board and a
the front corner members 1tl——1tl and rear corner mem
slidable block arranged for travel along one of the parallel
the pivoted end of the carriage elevating means, and the
screws;
FIGURE 30) is a detail longitudinal sectional view,
hers 12——12. A top is comprised in part by a solid plate
17, which is supported by the intermediate wall 11, the
taken on the section line 3tl—30 of FIGURE 2.9 and
end walls 15 and the rear corner members 12—~12.
The
hinge and hinge pin for tilting the carriage, which sup
Wings or side extensions 24-24~ are mounted on the
looking in the direction of the arrows, showing the at 60 end walls 15 are rabbeted into the top plate 17 at 17a as
shown in FIG. 5. Between the end frame members
tachment of the cone clutch according to FIGURE 29
13—13 and between the intermediate wall 11 and the
to the slide, which supports the drawing ‘board, and the
front side frame member 14, the top is open as shown in
guide on the top of the desk;
FIG. 3.
FIGURE 31 is a detail horizontal sectional View, taken
As shown in FIGURES 3, 4 and 5, a super structure is
on the section line 31—31 of FIGURE 26 and looking in
provided for partially enclosing the carriage, to be later
the direction of the arrows, showing a latch for holding
described, at its sides. This super structure is comprised
the carriage, which supports the drawing board, against
in part by sills 22 22, which are positioned on the top
sliding movement along the desk top;
plate 17 and the end frame members I3—13. (See FIG.
FIGURE 32 is a detail substantially vertical sectional
2.) End ‘walls 23—-‘23 are vertically aligned with the
view, taken on the section line 32-32 of FIGURE 28 70 end walls 15——l‘5, respectively, of the main lower section
and looking in the direction of the arrows, showing the
of the desk and are rahbeted into the top plate 17 at 1712.
ports the drawing board;
end :walls 23—23 of the super structure, and the end
FIGURE 33 is a detail partial transverse sectional view,
walls 23-423 are rabbcted into the wings on the under
taken on the section line 33—33 of FIGURE 25, and 75 sides of the latter at 24a.
3,095,667
5
6
The carriage is comprised in part by a bottom plate 30,
and are received in inverted U-shaped notches 42 in the
under sides of the bearing brackets 38. Coiled compres
sion springs 73 surround the axles ‘72 and abut at one end
the circular end plates 70 and at their other ends the
bearing brackets 38. On one of the axles 72 there is
mounted a hand wheel 74 for rotating the winding roller
which is slidable over the top plate ‘17 and the interme
diate wall 11 on the main lower section of the desk. A
rear plate 31 may be integrally formed with the bottom
plate 30, or as a separate element and attached thereto in
any suitable manner. This rear plate 31 has an inturned
horizontal ?ange 31a at its top. Side plates 23 are posi
66. For right hand operation this hand wheel will be on
tioned on the sills 22.
the right axle 72, as shown in FIGURE 4, and vice versa
for left hand operation.
Bearing brackets 38 (see FIGS. 3 and 4) are positioned
A releasable bearing support is provided for holding
inwardly of the side plates 23. Along their tops these 10
the axles 72 in place in the U-shaped slots 42 in the
bearing brackets areformed with outwardly turned ?anges
bearing brackets 38, as shown in FIGURE 8. These
38a. At their front ends and adjacent their rear ends
axles 72 are freely received in apertures 43 which extend
these bearing brackets are also formed with integral legs
through short levers 76, the apertures 43 extending along
3812, which in turn are formed at their bottoms with out
wardly extending toe ?ange-s 380. The latter are secured 15 the transverse center line of the levers 76. The levers
to the bottom plate 30 of the carriage by bolts or machine
screws 39. Also, at their rear ends the bearing brackets
76 are U-shaped in cross section and receive the lower
and inwardly positioned web 158e, which latter is parallel
longitudinal center lines. Arms 81% have cam ends 8%,
which are received in the U-shaped slots 77 in the levers
and are pivotally mounted in the bearing brackets 38 by
short bolts 79, which have wing nuts 81 on their outer
ends. It will be apparent that upward movement of the
arm 80, as viewed in FIGURE 2, will swing the lever 76
downward and thrust the axle 72‘ from the slot 42 in the
bearing bracket 38 and that the rear winding rollers 65
and 66 may then be removed by disengaging the circular
30 collar 70 and compression the spring 73 towards the bear
sides of the ‘bearing brackets 38‘, as shown in FIGURES
9 and 2. At one end the levers 76 are pivotally mounted
are formed with inturned right angle‘ ?anges 38d, the
on the bearing brackets 38 by short bolts 75, at their other
latter underlying the inturned ?ange 31a on the rear plate
31. These rear ?anges 38d terminate in a downwardly 20 ends they are formed with U-shaped slots 77 along their
to the rear plate 31.
The drawing board is shown at 40 and the paper trained
.thereover at ‘48. To secure the drawing board in place,
screws 41 extend through suitable holes in the upper 25
?anges v38a on the bearing brackets and into the drawing
board.
The tensioning roller is shown in FIGURES 2, 3 and 5.
This roller is rotatably mounted at the rear of the draw
ing board 40‘. This roller is comprised principally by a
cylindrical tube 50. At each end of this tube 50 there
are formed diametrically disposed recesses 51 in the side
ing brackets 38; conversely, downward movement of the
arm 80 will swing the lever 76 upward and securely latch
the axle 72 in the slot 42 in the bearing bracket 38 to
give su?icient thrust to prevent rotation of the rollers 65
ends of the tube 50 and these end plates have diametri 35 and 66.
The front winding roller is shown at 82 (FIGURES
cally positioned tongues 53 thereon, which ‘are received in
2, 3 and 4). This may be a ?ber cylinder or a metal
the recesses 51 in the ends of the tube. Stub shafts 54
cylinder encased by a ?ber sleeve. The latter construc~
are mounted centrally of the end plates 52 and these stub
tion is shown in FIGURE 24, which construction is sub
shafts are slidably mounted in slots (not shown) in the
bearing brackets 38, which slots extend longitudinally of 40 stantially identical with the rear winding roller, previously
described. As shown in the latter ?gure, the hollow metal
the brackets. Spacer collars 55 are positioned between
cylinder 82 is a mandrel and is freely surrounded by a
the end plates 52 and the legs 38b. These may be two
hollow outer cylinder 86, ‘which may be of ?ber. At
(2) part semi-cylindrical collars with a suitable central
each end of the mandrel 82 there are formed diametrically
hole therein for receiving the stub shafts 54. The com
plementary halves of the semicylindrical collars are held 45 disposed recesses 83‘, which recesses are rectangular in
cross section. Circular end plates 85 are received over
together by either a split metal band 56, or by adhesive
the opposite ends of the hollow cylinder 82 and these end
tape wrapped same. Beyond the legs 38b of the bearing
plates have diametrically disposed tongues 84 thereon,
brackets the stub shafts ‘54 pass freely through slidable
which are received in the recesses 83‘ in the ends of the
blocks 58. These latter are held in place on the legs 38b
of the bearing brackets by angle members 59 which have 50 mandrel 82. Collars (not shown) identical to collars 68
also surround the mandrel 82 and abut the outer hollow
machine screws 60 securing their bottom ?anges to the
cylinder 86 at its opposite ends. These collars are simi
legs with their top ?anges 59a holding the blocks 58
larly held in place by radially positioned set screws.
against the legs. Rods ‘61 are rotatably secured to the
Axles 89 are positioned centrally of the end plates 85 and
slidable blocks 58 and are received in suitable screw
threaded holes 38c in the webs ‘38d on the bearing brack 55 are received in inverted U-shaped slots '42 in the under
sides of the bearing brackets 38. On one of these axles
ets. At their outer ends these rods 61 carry knobs 63,
89 there is mounted a hand wheel 96 for the forward
which knobs have hubs 63a rotatably received in suitable
winding roller. Like the hand wheel 74 for the rear
holes 36 in the rear plate 31 of the carriage. Coiled com
winding roller 66, this hand wheel is positioned on the
pression springs 62 surround the rods 61 and at one end
abut the webs 38d on the bearing brackets and at their 60 right, as viewed in FIGURE 1, for right hand operation.
The releasable bearing sup-port for the tront winding
other ends the hubs 63a of the bearing brackets.
roller 86 is identical with that for the rear winding roller
The rear winding roller is shown in FIGURE 8. It is
66, as is the associated spring (not shown).
comprised in part by a mandrel in the form of a hollow
The drawing paper 48 is trained over the rear winding
tube 65. An outer hollow cylinder 68, which may be of
?ber, freely surrounds the mandrel =65. Collars 68 are 65 roller 66, the tension roller 50, the drawing board 40 and
the front winding roller 86. It may be secured to the
received on the mandrel 65 and about the outer hollow
winding rollers 66 and 86 in any suitable manner, as by
cylinder 66 at its opposite ends. These collars 68 are
drafting tape or paper cement.
held in position by radially positioned set screws 67. At
An elevating means is provided for raising the carriage
each end of the mandrel there are formed diametrically
disposed recesses 69, which recesses are rectangular in 70 to an inclined position if desired, and without shifting
same forwardly as shown in FIGURES 2 and 11. This
cross section. Circular end plates 70‘ are received over
means is comprised by a lifting bar 90 having a longi
the opposite ends of the mandrel 65, and these end plates
tudinal slot 93 adjacent one end and an approximately
have diametrically disposed tongues 71 thereon, which
right angle ?ange ‘90a at the other end. The ?ange 90a
'are received in the recesses 69‘ in the ends of the mandrel.
underlies the bottom plate 30 of the carriage ‘at the rear
Axles 72 are positioned centrally of the end plates 70
wall of the latter, which recesses are rectangular in cross
section. Circular end plates 52 are received over the
3,095,667
7
of the latter. A screw 94 having a lock nut'94a therein
passes through the slot 93 and is received in an internally
threaded cylinder 95, which latter is secured to the rear
wall 16 of the lower sections of the desk. This elevating
means may be positioned along the vertical center line of
the rear wall 16 of the desk, or may be provided in dupli
cate and the cylinders 95 secured to the rear corner mem
bers 16. A levelling strip 18, ‘of the same height as the
thickness of the ?ange 99a on the arm is provided ‘across
8
plate 116 travelling in the recesses 99 and the inner plate
104 travelling over the faces of the ?anges 96a and 96b.
When the carriage has reached the desired position, the
hand wheel 112 may be rotated in the opposite direction
to move the inner clutch member 167 into engagement
with the outer clutch member 186, the compression spring
110 being released and holding the clutch members in
engagement.
The arrangement according to FIGURE 7 differs from
the top of the desk, in vertical alignment with the in 10 that according to FIGURE 6 in two features. The outer
clutch member 106 is here replaced by a plurality, at
termediate wall 111.
least four (4-) closed end cylinders 115, which are arcu
In order to elevate the carriage through the elevating
ately spaced around the inner plate 98a ‘and the outer
means just ‘described, the carriage is shifted slightly rear
plate 163. These cylinders have aligned axially posi
wardly, until the front end of the bottom plate 31} is inside
the front corner members 1(i—-1tl. The carriage may 15 tioned holes 116 in their opposite ends, through which the
then be tilted in the counter-clockwise direction, as
bolts 1G2 pass. Within each cylinder 115 there is a plu
viewed in FIGURE 2, and held in such position by setting
the bar 90 in the selected position and clamping same
rality, preferably four (4) roller bearings 117, which
and lower ?anges 96a and 96b, respectively, thereon,
the clutches.
surround the bolts 102. These roller bearings have coni
cal or needle ends 117a, which are guided by the ends of
by the screw 94.
FIGURE 6 shows an arrangement in which the carriage 20 the cylinders 115. These cylinders rotate on the bolts 192
as axles and between the ?anges 96a and 96b (see FIG.
is supported for movement on a track and a clutch is
6) of the channel or track member 96 and the outer
provided for holding the carriage in any selected posi
clutch member 106. This arrangement has the advantage
tion. On each side of the carriage a channel member
that the upper roller beanings 117 on the opposite sides
having a wall or web 96 is secured to the side plate 23 of
the desk by bolts 97. The channel member has upper 25 of the drawing board 451 prevent any twisting action by
If desired, separate plates (not shown)
which are recessed ‘at 99 adjacent their junctures with the
web 96. An outer plate 1% travels in the upper and
lower recesses 19 and an inner plate 164 over the faces
of the ?anges 96a and 96b. The plates 1% and 1124 are 30
screwed to wings 24 and the sills of plate '30 may serve
as tracks for the bearings. The outer conical clutch mem
her 106 as shown in FIGURES 3 and 6 also has ?anges at
mid-section at 108a and reduced in diameter at its outer
end at 1138b.
clutch 107.
In FIGURES 10 to 15, inclusive, there is shown a modi
fication in which two (2) parallel screw threaded shafts
its opposite ends for receiving bolts 102.
Another feature of the arrangement according to FIG
held in assembled relationship by bolts 162 having nuts
URE 7 is that the outer ends 10317 ‘of the clutch shaft have
163 thereon, which bolts pass through spaced holes adja
separate mountings from the bearing brackets 38 which
cent the circumferences of the plates. An outer frusto
support the drawing board 45) and bottom plate 80.
conical clutch member 106 has ?anges at its opposite
ends, which ?anges also have arcuately spaced holes there 35 Pedestals 118 have toe ?anges 2118b ‘at their bottoms and
are mounted on bottom plate 30 by cap bolts 119. At
in for receiving the bolts 1112. An inner frusto-conical
the tops of the pedestals 118 there are integral bosses 118a
clutch member 167 has a cylindrical boss 167a on its
having axial bores therein in which the outer ends 1022b
outer face and an integral ‘axially positioned shaft 1118
of the clutch shaft are slidably mounted. The bottom
on its inner face. The cylindrical boss 167a is slidably
received in an axial hole 101 in the outer plate 160 to 40 plate 30 is wider than shown ‘in the arrangement accord
ing to FIGURE 6 to provide space for the pedestals 118.
provide bearing support. The inner plate 194 ‘also has an
This arrangement has the advantage that the bearing
axial hole 195 therein and ‘a ?anged bushing 109 has its
brackets 38 are separated from the pedestal mountings
hub 1119a received in this hole. Between the inner face
118 for the carriage. The drawing board 40 and the
of the inner clutch member 167 and the bushing 109,
carriage may accordingly be removed and replaced with
and surrounding the shaft 108, there is mounted a com
out removing the pedestal 118, hand wheel 112 or the
pression spring 110. The shaft 168 is threaded at its
The bottom plate 30 is here mounted in horizontal
parallel relationship with the drawing board 40 by brack 50 are provided for shifting the carriage transversely of the
ets 25 which have upper and lower ?anges 25a and 25b,
respectively, thereon. These ?anges are secured to the
bottom plate ‘30 and the drawing board 40 by screws 26.
At their mid-section the brackets 25 have bosses 27 with
axial bores therethrough in which the outer ends 1118b
of the shafts 198 are slidably received. The bores
through the bosses '27 are each ‘formed with a key way 28
in which a key 111 on the outer end of the shaft 108 is
received to constrain the shaft against rotation. ‘It will
be apparent that the outer ends 1081) of the shafts could
as well be made square and complementary square holes
formed through the bosses 27. A hand wheel 112 has a
screw threaded bore through its hub by which it is
desk. As here shown the bottom plate 30 has a partial
top plate 31a at the rear, which is on the same level as
the wings 24——24. The channel members 96-§6 are
here mounted between the wings 24- and the sills 22.
The roller bearing mounting for the clutches is shown
in FIGURE 13. The inner plates 100 of the clutches in
FIGURE 6 are here replaced by rectangular plates 129,
which have inwardly offset extensions 120d of reduced
width at their forward ends. The outer clutch member
106 ‘of FIGURE 6 is here replaced by a clutch member
121 which is cylindrical on its outer surface. Cylinders
123 roll between the upper and lower ?anges 96a and 96b
of the channel members 96. These cylinders are rotatably
mounted around the outer clutch members 121 by roller
rotatably mounted on the screw threaded mid-section
108:: of the shaft 108. The hub of the hand wheel also (35 bearings 122 which are similar to the roller bearings 117
of FIGURE 7. On the inwardly offset extension 120d
has a circumferential groove 112a therein. An arcuate
of the plate 120‘ there are mounted roller bearings 125
retainer plate 114 is secured by screws 113 to the boss 27
on the bracket 25 and has a ?ange 114a thereon which
is received in the groove 112a in the hub of the hand
on shafts 124. These roller bearings run respectively on
the ?anges 96a and 96b of the channel member 96. Their
70 purpose is to prevent rotation of the outer clutch member
wheel to constrain the latter against axial movement.
1121. Bolts 102 extend through outer clutch member
It will be apparent that the hand wheel 112 may be ro
121, inner rectangular plates 120 and an outer plate (not
tated in the counter-clockwise direction, as viewed from
shown) substantially identical to plate 104 (see FIG. 6)
the left in FIGURE 6, to draw the inner clutch member
form an integral unit.
167 inwardly and compress the spring 110. The carriage
As shown in FIGURE 12, the outer ends of the shafts
may then be slid either forwardly or rearwardly, the outer
3,095,667
9
10
10815 are here received in bores 127 in pedestals 128. The
and are secured to the latter by bolts 131. These slides
The arrangement shown in FIGURE 18 is distinguished
from those already described by several features. The
bearing brackets 38 of the carriage has four (4) notches
42 therein for its axles 54, 72 and 89 of the winding
rollers 66 and 82 and the tensioning roller 50 formed
130 are slidably received under the ?anges 132a of guide
in pairs with the notches of end pair uniformly spaced
members 132. The latter are secured by screws 133 to
and the pairs uniformly spaced from the ends of the car
riage. With this arrangement both winding rollers 66
bores 127 have keyways 126 therein for the reception of
the keys 1111. At their bottom the pedestals 128 have out
turned ?anges 128a. The ?anges 128a rest on slides 130
the bottom plate 30 of the superstructure.
The pedestals 128 have screw threaded bores 1129‘ there
and 82 may be placed near the front of the carriage and
in in which are received elongated screw threaded shafts 10 the tensioning roller 50 near the rear of the carriage, as
135. As shown in FIGURES 1'1 and 14 these shafts are
shown, or vice versa.
reduced in diameter at their outer ends at 135a and are
According to the construction of the desk here shown,
rotatably mounted in brackets 136—136 at the opposite
the super structure is complete between the wings 24—24.
sides of the bottom plate 30 of the carriage. The brackets
The latter includes a bottom plate 20, which rests on the
136—-136 have right angle bottom ?anges 136a by which 15 top plate 17 of the desk. There is also a rear plate 31,
they are secured to the bottom plate 36 of the carriage by
which is aligned with the rear wall 10 of the desk. Corner
screws :137, which pass through the guides 132. As thus
rods 35 are secured to the bottom plate 20 and the rear
mounted, the brackets 136—136 thrust the clutch to the
plate 31 by bolts or pins 34. The guides 133 are secured
top of the desk. Collars 140 are secured on the reduced
to the bottom 21} by screws 152, as shown in FIG. 19.
ends 135a of the shafts by radially positioned set screws
A latch 154 is provided for holding the carriage in
139 and these collars abut the brackets 136-436 to hold
any one of several selected positions along the guides
the shafts against longitudinal movement. By shifting
133-433, as may be desired. This latch is shown in
the positions of the clutches 125 relative to the bottom
position on the carriage and the super structure of the
plate 30, the drawing board =40 as shown in FIG. 11
desk in FIGURE 18 and in detail in FIGURE 19. An
may be elevated to a desired angle or vertical position to 25 angle bar 148 is secured to the top of one of the slides
suit the draftsman.
1130 by bolts 149. This angle bar has longitudinally
The two shafts 135-135 are interconnected by a chain
aligned holes 151} in its upstanding ?ange. A right angle
144, (see FIG. 10) which runs over chain gears 142-—142
bracket 32a is secured to the bottom plate 20‘ of the super
on the inner ends of the shafts. These chain gears are
structure by screws 153. This bracket has a hole in its
held in place by vertically positioned set screws 143
upstanding ?ange adapted to align with the holes 150‘ on
through their hubs 142a. At their outer ends the shafts . the upstanding ?ange of the angle bar 148. An L-shaped
135 are formed in square sections 1351). A hub crank
pin 154 is inserted in the aligned holes 150 in the up
145 may be placed on either end of either shaft 135 for
standing ?anges of the angle bar and the bracket. As
rotating the latter and moving the carriage transversely of
shown in FIGURE 18, the holes 150 in the upstanding
the desk. The rear plate 31 has a hole 32 therein for 35 ?ange of the angle bar 148' may be replaced by, or sup—
receiving the thumb of the hand crank 134a.
plemented with holes 151 in the toe ?anges 38c of the
bearing brackets 38, if desired.
The angle bar @148 is attached between the toe ?anges
the guide 132, as in the arrangement according to FIG
380 to the slides 134} by rivets 149 (see FIGURE 19).
40
URE 11.
In FIGURE 2.4 there is shown an arrangement in which
As shown in FIG. 11 the axles 72 of the tensioning
the slides 132 are mounted transversely of the carriage.
roller 50 are held in place by U-shaped slots in the hear
They are secured to the latter by bolts 155 which ex
The brackets 136—136 for the screw threaded shafts
-135—135 are mounted above and in parallel relation to
tend through suitable holes in the toe ?anges 38a on the
ing bracket 38, short levers 76 and arm 8%)‘ as disclosed
previously in FIGURES 8 and 9.
45 bearing brackets 38 and have nuts 156 therein. This
In the species of FIGURE 16 there is shown an arrange
arrangement is particularly adapted to the carriage where
ment which is particularly adaptable to a square drawing
the latter is made square in top plan view. In such case,
board. In this arrangement the slides 13!) are secured
the slides 132 may also be mounted longitudinally of the
directly to the toe ?anges 380 on the bearing brackets 38
carriage, using the same holes in the toe ?anges 38a and
of the carriage and the guide 133 is secured directly to 50 the same bolts 155. This latter position of the slides 132
the bottom plate of the carriage by screws 152.
is shown in phantom lines in the same ?gure. The ad
As shown in phantom lines the carriage can be pulled
vantage of this arrangement is in the making of a draw
forwardly over the bottom plate 20 and beyond the sta
ing that is the same or a lesser length than the rollers,
tionary desk top 17. In such position the carriage is con
instead of making a drawing on a long sheet of paper
veniently located for removal or replacement of the wind 55 wound on the rollers and turning the board through 90
degrees. In this case the views on the two drawings will
ing rollers 66 and 82 and the tensioning roller 50'. Also,
in such position the draftsman can conveniently draw from
have the same relative positions. However, the rear
winding and tension rolls may be added and supported
either side board, as well ‘as from the front.
in the U slots in the bearing bracket 38.
The arrangement shown in FIGURES l7 and 20' is also
particularly adaptable to a square drawing board 40 60
In FIGURES 25, 26, 27, 28, 32 and 33 there is shown
an arrangement for tilting the carriage and drawing
mounted in bearing brackets 38 and toe ?anges 380. In
this arrangement the carriage is also provided with slides
board, which is alter-native to or combined with the tilt
130 along its longitudinal center lines. Only two guides
ing means shown in FIGURE 3. The guides 132—132
are mounted on a hinge plate 157 beneath the carriage,
136 are used as before. With this arrangement the car
riage may be removed from the desk top 17, over the bot 65 as shown in FIGURES 27, 28 and 32. At the inner end
of this plate 157 there is secured by a rivet 158- a hinge
tom plate 20, rotated through 90 degrees and then re
159 having a pivot pin 160-. The complementary leaf
placed on the desk top. The carriage is shifted from one
of this hinge is in‘ the ‘form of an elongated plate 162
position to another by pulling it forward, turning through
90 degrees and then pushing it rearwardly to the full line
which is secured to the bottom 20 of the central section
position as shown. The drawing board 40‘ may then be 70 of the super structure by screws 161. At the opposite
of the plate 162, adjacent the rear wall of the super struc
positioned as the draftsman may like ‘and to suit prin
cipally, the length of the drawing. It is of course easier
ture, this plate is formed with a loop 163. (See FIGURE
26.) A rod 164 has .a right angled, lower end, which
to work a long drawing from the sides but there are ex
is pivotally secured‘ in the loop 163. At the outer end
ceptions and the present arrangement provides as well for
working a long drawing from the ends, if desired.
75 of the ‘guide 132 there is mounted an offset bracket 165,
3,095,667
11
and one arm of this bracket being secured to guide 132
and the other arm having a hole therein for receiving the
main body of the rod 164. A screw threaded hole is
formed in this latter arm at right angles to the hole which
receives the rod 164. A set screw 166 is received in the
screw threaded hole in the arm of the bracket 165 and
has a knob 167 on its outer end (see FIGURE 25).
As best seen in FIGURE 27, the angle bracket 163 of
the latch 154, which is similar to the arrangement dis
closed at 32a (FIGURE 19) is secured to the bottom 20
of the super structure, is replaced by an angle bracket
168 which has a right angle ?ange 168a at its bottom and
a boss 16812 at its top. The ?ange 168a is received
under the guide 132 with the hinge plate 157 and held
Pedestals 186 which are similar to the pedestals in
FIGURE 12 have outwardly extending ?anges 186a at
their bottom.
These pedestals 186 are secured by bolts
13% which extend through aligned holes in the ?anges
136a and the slides 132a.
The pedestals 186 have trans
verse.y extending screw threaded bores therein, which
receive the screw threaded shafts 135. Each pedestal
has an axially extending bore 187 therein and a keyway
along their bore. A key 188 is secured in a complemen
tary keyway in central shaft 17% of the inner clutch
member and constraining the latter against rotation. A
plate 1% having a central hole therein is secured over
the outer face of each pedestal by machine screws 189.
In the plate there is rotatably mounted a shaft 192, which
in place by the screws or rivets 158. The boss 16%!) 15 has an inner screw threaded end 179a received in an
axially positioned screw threaded bore 192 in the central
has a hole therethrough, which is adapted to relatively
shaft 17311 on the inner clutch member. The shaft 192
align with the holes 151 in the toe ?anges 3:30 of the
also has an integral disc 193 therein, which is positioned
bearing brackets 38 and angle iron 14% to receive the
in an counterbore 187a in the pedestal and abuts the plate
L-shaped pin 154. The angle irons 148 support the toe
on the inner surface of the latter. A handwheel 195
20
?anges 380 of the bearing bracket 33.
is secured inv the outer end of its shaft 192 by a key 196,
In the arrangement according to FIGURE 33, the loop
in a keyway 196a.
169 at the rear end of the elongated plate 162, as shown
In the type of cone clutch here described the disc 1%
in FIG. 26, is replaced by a second hinge loop 1'71 hav
rotating in the counterbore 1370 in the pedestal takes up
ing a pivot pin 170 therein. The central butt of the
hinge comprises a plate 171]) in which latter there are 25 the thrust load on the clutch. This thrust load is oppo
site to that on the clutch described in connection with
formed holes at right angles for riveting to the rod 164.
FIGURE 6, and places the bottom plate 313 of the cur
One hole diametrically positioned in a boss 171a. re
riage in compression, while the thrust load of the clutch
ceives the depending rod 164. The other hole is axially
of FIG. 29 places the bottom plate 2% in tension thereby
positioned in the boss and receives a beaded set screw 172.
tending to force the edge 1b of the sill 22 against the
With the carriage and drawing board held in the ele
edge 1a of the bottom plate 2%} as assistance in preventing
vated position by the hinge 159 and rod 16%, as shown
rotation and holding the carriage in place as shown in
in FIGURE 26, the carriage may be pulled outwardly
FIG. 3.
without disturbing such positions. In addition to the
In FIGURE 31 there is shown a latch for holding
features of elevating the drawing board, the carriage can
be elevated and held in position by the clutches 176. 35 the central section of the super structure in place. As
shown by the arrow in FIGURE 26 this central section
Also, the carriage and drawing board may be pulled for
can be tilted upwardly above the clutches 176-476 or
ward, as in the previous modi?cations, with or without
by pivots 159. At one corner of an end strip 21, which
elevating the carriage, as indicated in dotted lines in
is on the front of the bottom plate 20 of the central
FIG. 26.
In‘ FIGURE 26 there is also shown an alternative man 40 section of the super structure, there is formed a right
angled recess
by a large diameter bore, which extends
ner of training the paper 48 over the front and rear wind
longitudinally of the bottom 20, and a smaller diameter
ing rollers 66 and 82, respectively, and the forward ten
bore, which extends transversely of the bottom and inter
sioning roller 56‘ as shown, the paper 48 is trained under
sects the ?rst bore. A keeper in the form of a bushing
the forward winding roller 66, over the rear winding
291 is mounted in a bore in either the adjacent front
roller 32, and under the forward tensioning roller 5%, and
over the drawing board 40 and wound on roller 82. This
manner of training the paper over the rollers keeps the
paper taut at all times and prevents excessive slack when
either of the wind-ing rollers are turned. It should be
noted that, if the paper is kept taut at all times, the shift 50
corner member 10 or the inner end wall 15 of the desk.
The movable element of the latch (see FIGURE 10)
is a detent in the form of a right angled pin 204, which
has one arm in the lengthwise extending bore and the
other arm in the transversely extending bore. A collar
2% is force ?tted on the latter arm and this collar is
ing of same sideways will be practically eliminated.
slidably mounted in a bushing 293, which is force ?tted
In‘ FIGURES 29 and 30, there is shown still another
in the transversely extending here. It will be obvious
alternative form of the clutch and this clutch is used in
that the pin 2% may be pulled transversely of the bottom
the arrangement according to FIGURE 6. Guides 174
55 it? in recess 2% to clear the adjacent end wall 15, the
are mounted on the sills 22 of the super structure by
central sections of the super structure may be swung
screws 173. These guides are similar to the guides 132
fastened to the bottom 26 of the super structure. By
screws 173 slides 175 are slidably mounted in the guides
upwardly, in the direction indicated by the arrow in
FIGURE 26, employing the clutches 176-—176 as pivots
the outer plate 182, surrounding the guide 1780.
L-shaped longitudinally extending bars 265-205, which
174. An outer clutch member 1'76, having ?anges at 60 and the pin pushed outwardly to engage in the bushing
.531 and hold. the bottom 20 of the super structure in
both ends and a 'frusto-conical inner surface, is secured
the elevated position. The keepers 201 may be provided
to each slide 175 by bolts 177 at toe ?anges 176a. An
at spaced locations along the end walls 15, or the front
‘inner frusto-conical clutch member 178 is received within
corner members it}, to hold the central section of the
the outer clutch member 176. Inner and outer plates
super structure in any one of several elevated positions, ‘
180 and 182, respectively, are secured over the outer
clutch member 176 and held in place by bolts 189a, 65 as may be desired. Also, the latch may be provided on i
both sides of the bottom it.‘ of the central sections of the
which extend through aligned holes 189 in the plates
super structure to make the central section more stable in
and the ?anges of the outer clutch member 176. The
any one of the elevated positions.
inner clutch member 178 has on its face a guiding boss
In FIGURES 34, 35, 36, 37 and 38 there is shown
178a, which slides and is received in a central hole 183
in the outer plate 182. On its other face the inner clutch 70 an arrangement in which a circular drawing board is
rotatable on the carriage. The clutches, slides and guides,
member has an integral centrally positioned shaft 17811,
hinges and latch are the same as in the arrangements
which slides and is received in a central hole 181 in the
according to FIGURES 25, 26, 27 and 28. As shown in
inner plate 180. A coiled compression spring 185 is
FIGURE 35, the carriage is supported by two inverted
positioned between the inner clutch member 178 and
speaser '
13
‘have right angle extensions 265a at their outer ends. In
176-476 (see FIG. 35) while being rotated through
FIGURES 36 and 37 it will be seen that these bars have
outer ?anges 205b, which ?anges are cut away across
the right angle extensions 205a to leave extensions 205d
of the horizontal ?anges. These extensions are secured
90 degrees. In FIGURE 39 the carriage and board are
to the slides 130 by bolts 131 having suitable nuts therein,
which bolts are received in aligned holes in the extensions
and the slides, the L-shaped bars 168 being secured to
the slides 130.
shown in top plan view in the forward position before
being rotated, in phantom lines. After the carriage and
board have been pulled forward and rotated through
90 degrees, as shown in full lines, they may be kept in
that position for convenience in drafting, or pushed rear
wardly to position over the bottom plate 30 above the
top 17 of the desk.
The various slides, guides, tracks, channels and other
A double walled annular plate 206, which is channel 10
components as herein shown and described do not neces
shaped around its circumference to form upper and lower
sarily limit these particular designs of these parts to
?anges 206a and 206b, respectively, and which may con
this invention for shifting the drawing board.
sist of two half sections 206e and 296]‘ and is rotatably
Having now fully described my invention, which I claim
‘mounted on the longitudinally extending bars 205—205
and the L-shaped bars 168 as shown in FIG. 36. This 15 as new and useful and desire to secure by Letters Patent
of the United States, from the foregoing it will now be
plate is constrained in its circle of rotation by stud bolts
seen that there is herein provided an improved rotatable
207, only one of these being shown but three or four
and translatable drawing board construction which accom
being preferably provided. These stud bolts 207 are
plishes all of the objects of the invention and others
received in screw threaded holes in the top ?anges of the
including many advantages of great practical utility and
bars 205, have nuts 208 therein and washers 269 beneath
commercial importance.
the nuts. The washers 209 grip the outer edge of the
‘As many embodiments may be made of this inventive
lower ?ange 20612 on the annular plate 206, which rests
concept, and as many modi?cations may be made in the
on the supporting bars 205--205 and L bars 168 168.
embodiments herein'oefore shown and described, it is to
As shown in FIGURE 35 one setof the stud bolts 297
and washers 208 is here replaced with a cam 213a, are 25 be understood that all matter herein is to be interpreted
merely as illustrative, and not in a limiting sense.
provided on the rear longitudnial bar 205 and to the right
I claim:
of the transverse center line. Other sets will preferably
1. A drawing board mounting comprised by a carriage
be provided on both the front and rear longitudinally
arranged to travel over a horizontal surface, a drawing
extending bars 205—205 and symmetrically positioned on
the opposite sides of the transverse center line to con 30 board supported on said carriage, an arrangement of roll
ers over which the drawing paper is trained comprised
strain the annular plate.
by a winding roller along one edge of the drawing board,
In the alternative arrangement according to FIG
a tension roller along the opposite edge of the drawing
URES 34 to 37 the front and rear longitudinally extend
board, a second winding roller intermediate the ?rst
ing bars 205~205 may be replaced by a square sup
porting plate 210, which has a downwardly extending 35 winding roller and the tension roller, parallel .tread mem
‘ bers on the opposite sides of said carriage, and supports
?ange 210a and an upwardly extending ?ange 21Gb simi
including parallel plates slidable along the opposite edges
lar to the L bars 168, the plate 210 being above and
of said parallel tread members ‘and rollers carried by
.secured to the slides 130. With this arrangement the
said plates and engaging said parallel tread members.
annular plate 206 is entirely supported in its circle of
2. A drawing board mounting comprised by a carriage
rotation by the plate 210 and constrained by the stud bolts 4.0
arranged to travel over a horizontal surface, a drawing
207, nuts 208, and washers 26%.
board supported on said carriage, an arrangement of
The plate 210 may also have an inside upwardly
rollers over which the drawing paper is trained com
extending circular ?ange 213 to match the inside diam
prised by a winding roller along one edge of the drawing
eter of the annular plate 286. This circular ?ange 213
also constrains the annular plate in its circle of rotation 45 board, a tension roller along the opposite edge of the
drawing board, a second winding roller intermediate the
with assistance of bolts 207, nuts 2-08 and washers 209.
?rst winding roller and the tension roller, parallel tread
Rectangular plates 212, which have one corner cut
‘ away, are secured by bolts or rivets 211 to the upper
members positioned on the opposite sides of said car
riage, supports including parallel plates slidable along
?ange 206a of the rotatable annular plate 206. There
are preferably four (4) of these annular plates, spaced 50 the opposite edges of said parallel tread members, stub
90 degrees apart. The toe ?anges 38 on the bearing
shafts positioned axially of said parallel plates, rollers
carried by said plates and engaging ‘said parallel tread
brackets 38 of the carriage are secured to these brackets
by the bolts or machine screws 39.
‘
members, and clutches intermediate said plates and the
respective stub shaft.
'
In order to lock the rotatable annular plate 206 and
3. A drawing board mounting comprised by a carriage
the carriage therein in the selected position, an arrange 55
ment is provided, as shown in FIGURE 35. The ‘fourth
bolt, nut and washer set 207—208-~209, which would be
positioned on the front longitudinally extending bar 265,
arranged to travel ‘over a supporting structure, a draw
. ing board supported on said carriage, an arrangement of
rollers over which the drawing paper is trained com
on the right of the transverse center line as shown in this
prised by a winding roller along one edge of the draw
?gure and in transverse alignment with the set shown, 60 ing board, a tension roller along the opposite edge of the
is here omitted and is replaced by a manually operated
drawing board, a second winding roller intermediate the
cam 213a. This feature is shown in detail in FIGURE 38.
?rst winding roller and the tension roller, stub shafts on
The cam 213a has a handle ‘213 therein and is rotatably
- the opposite sides of said carriage, parallel tread 'mem
mounted on a stud bolt 207 having a nut 20S thereon.
bers mounted on the supporting structure and positioned
This stud bolt is received in a screw threaded hole in the 65 on the opposite sides of said carriage, supports including
top ?ange of the front longitudinally extending bar 205
parallel plates on the opposite sides of said parallel tread
and the cam is arranged to engage with the lower ?ange
members and having aligned vholes therein receiving said
20Gb on the rotatable annular plate 236 to hold the latter
stub shafts, rollers carried by said plates and engaging
in the selected position. Additional cams 213a could be
said parallel tread members, and clutches intermediate
applied to constrain the annular plate 206 or be sub 70 said plates and the respective stub shafts.
stituted for any or all of Washers 209 and nuts 203, if
4. A drawing board mounting comprised by a carriage
desired.
arranged to travel over a supporting structure, parallel
As shown in phantom lines in FIGURE 34 it is neces
guides mounted on the carriage, a drawing board sup
sary to pull the carriage and board 4%} forward before
ported ‘on said carriage, an arrangement of rollers over
rotating same, so that they will clear the clutch housings 75 which the drawing paper is trained comprised by a wind
3,095,667
has
ing roller along one edge of the drawing board, a ten
sion roller along the opposite edge of the drawing board,
a second winding roller intermediate the ?rst winding
roller and the tension roller, stub shafts on the opposite
sides of said carriage, slides movable in said parallel
guides, pedestals secured to said slides and having bores
therien for receiving the stub shafts on the carriage and
16
the carriage, cone clutches comprised by frusto-conical
members on said stub shafts, and complementary frusto
conical members surrounding said ?rst frusto-conical
members and received in the holes in said parallel plates,
outer frusto-conical members surrounding said comple
mentary frusto-conical members and arranged to run on
the respective parallel tread members, and roller bearings
threaded holes therein, and screw threaded shafts re
between said outer frusto-conical members and said com
guides mounted on the car-riage, a drawing board sup
ported on said carriage, an arrangement of rollers over
ment of rollers over which the drawing paper is trained
roller along the opposite edge of the drawing board, a
second winding roller intermediate the ?rst winding roller
?rst winding roller and the tension roller, parallel tread
and the slides along the guides, chain sprockets mounted
parallel guides mounted on the opposite sides of the
plementary clutch members.
ceived in the screw threaded holes in the pedestals for
8. A drawing board mounting comprised by a car
moving the pedestals and the slides along the guides.
10
riage arranged to travel over a supporting structure, a
5. A drawing board mounting comprised by a carriage
drawing board supported by said carriage, an arrange
arranged to travel over a supporting structure, parallel
comprised by a winding roller along one edge of the
which the drawing paper is trained comprised by a wind 15 drawing board, ‘a tension roller along one edge of the
drawing board, a second winding roller intermediate the
ing roller along one edge of the drawing board, a tension
members mounted on the supporting structure and posi
tioned on the opposite sides of the carriage, supports in
and the tension roller, stub shafts mounted on the op
posite sides of said carriage, slides movable in said par 20 cluding ?rst plates having holes therein adapted to run
along one side of the parallel tread members and second
allel guides on the opposite sides of said carriage, pedes
parallel plates having aligned holes therein adapted to run
tals secured to said slides and having bores therein for
along the other side of said parallel tread members, bal
receiving the stub shafts on the carriage and threaded
bearings mounted between said parallel plates and ar
holes therein, screw threaded shafts received in the screw
ranged to run on the respective parallel tread members,
threaded holes in the pedestals for moving the pedestals
on said screw threaded shafts and a chain trained over
said chain sprockets for conjoint operation of said screw
threaded shafts.
6. A drawing board mounting comprised by a carriage
arranged to travel over a supporting structure, ‘a drawing
board supported by said carriage, an arrangement of roll
ers over which the drawing paper is trained comprised
by a winding roller along one edge of the drawing board,
carriage, slides movable in the parallel guides, pedestals
secured to said slides and having bores therein for receiv
ing the stub shafts on the carriage, cone clutches com
prised by frusto-conical members on said stub shafts
and complementary frusto-eonical members surrounding
said ?rst frusto-conical members and received in the holes
in said parallel plates, outer frusto-conical members sur
rounding said complementary frusto-conical members
a tension roller along one edge of the drawing board, a 35 and arranged to run on the respective parallel tread mem
bers, and roller bearings between said outer-frusto-conical
members and said complementary clutch members.
9. A mounting for supporting a drawing board be
on the supporting structure and positioned on the op
tween
parallel surfaces comprised by channel members
posite sides of the carriage, stub shafts positioned on
the opposite sides of the carriage, parallel guides mount 40 mounted on said parallel surfaces, plates slidably mounted
in said channel members, shafts mounted on said plates,
ed on the opposite sides of the car-riage, slides movable
a carriage supporting the drawing board, parallel tracks
in said parallel guides, pedestals secured to said slides and
second winding roller intermediate the ?rst winding roller
and the tension roller, parallel thread members mounted
having bores therein for receiving the stub shafts on the
carriage, cone clutches comprised by frosts-conical mem
bers on said stub shafts and complementary frusto-conical
members surrounding said ?rst frusto-conical members,
outer frusto-conical members surrounding said comple
mentary frusto-conical members and arranged to run on
the respective tread members, and rollers bearings be
mounted on the bottom of said carriage, slides movable
through the tracks, pedestals mounted on said slides
and receiving said shafts, latch means for securing said
carriage in a selected position of adjustment, said latch
means comprising an angle bar, an angle bar having
openings therein on one of its slides, a bracket having
an opening therein carried by said bottom of said car
tween said outer frusto-eonical members and said com
riage, and an L-shaped pin extending through said open
plementary clutch members.
7. A drawing board mounting comprised by a carriage
said angle bar.
ing in said bracket and a selected one of said openings in
arranged to travel over a supporting structure, a drawing
board supported by said carriage, an arrangement of roll
ers over which the ‘drawing paper is trained comprised
by a winding roller along one edge of the drawing board,
a tension roller along one edge of the drawing board, a
second winding roller intermediate the ?rst winding roller
and the tension roller, parallel tread members mounted
on the supporting structure and positioned on the op
posite sides of the carriage supports including ?rst plates
having holes therein adapted to run along one side of
said parallel tread members and second parallel plates
having aligned holes therein adapted to run along the
other side of said parallel tread members, parallel guides 65
mounted on the opposite sides of the carriage, slides mov
able in the parallel guides, pedestals secured to said slides
and having bores therein for receiving the stub shafts on
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,237,170
1,258,230
1,720,121
1,915,347
2,284,917
2,414,606
2,515,466
2,825,426
2,855,721
Cline ________________ __ Aug. 14,
Lewis et a1. __________ __ Mar. 5,
Ewald ________________ __ July 9,
Wurm ______________ __ June 27,
Nelson ______________ __ June 2,
Page ________________ __ Jan. 21,
Nahmens ____________ __ July 18,
Baxter ______________ __ Mar. 4,
Shelly ______________ __ Oct. 14,
1917
1918
1929
1933
1942
1947
1950
1958
1958
2,896,366
2,968,115
Van Derdys __________ __ July 28, 1959
Randolph et a1 _________ __ Jan. 17, 1961
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