close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2412619

код для вставки
Dec. 17, 1946.
w. J. KINDERMANN ETAL
2,412,619
APPARATUS FOR AND METHOD OF MAKING CONTOURED
ELECTRICAL RESISTANCE CARDS
Filed May 3, 1944
3 Sheets-Sheet l
FIG?
W J K/NDERMANN
W 14! WERR/NG
ATTORNEY
Dec- 17, 1946.
w. J. KINDERMANN ETAL
2,412,619
APPARATUS FOR AND METHOD OF MAKING CONTOURED
ELECTRICAL RESISTANCE CARDS
Filed May 5, 1944
'
5 Sheets-Sheet 2
mun“
I
K
km’ IIH 53.
' -
/
'7
. Fill "LB"
58
96:
“as 75a 87a2
9/
‘94
95 :
i
W J ~KINDEA’MANN
WVZNVTORS w w WERR/NG
j Wm 23 M414
A TTORNE V
Dec. 17, 1946.
w. J. KINDERMANN ET AL
2,412,619
APPARATUS FOR AND METHOD OF MAKING CONTOURED
ELECTRICAL RESISTANCE CARDS
Filed May 3, 1944 _
3 Sheets-Sheet 3
H65
53
-
W J K/NDERMANN
lNl/ENTORS
_ WW WERR/NG
BYJQ 71m X mm
A TTOR/VE V
Patented Dec. 17, i946
2,412,619 7
I
STATE/S PATENT OFFICE
2,412,619 '
APPARATUS FOR AND METHOD OF MAKING
CONTOURED ELECTRICAL RESISTANCE
CARDS
Wilfred J. Kindermann, Mount Vernon, and '
Walter W. Werring, New York, N. Y., assignors
to Bell Telephone Laboratories, Incorporated,
New York, N. Y., a corporation of New York
Application May 3, 1944, Serial No.'533,996
9 Claims.
1
This invention relates to card making and more
particularly to apparatus for and a method of
making cards of predetermined precise forms.
An object of the invention is to provide means
for accurately making cards suitablefor use as
supports for windings of wire used as resistance
(01. 90-13)
'
2
‘card varies in width along certain portions of the _
card} Precision is required in making the cards
and e?orts have been made to cut cards to required, 1
dimensions and forms by ?rst making a templet '
of the required pattern and using this as a guide
for a cutting tool or as a guide for a scriber to
mark the required pattern of the card ,on a strip
of material from which the card is to be made by
cutting the material along the scribed line on the
The present-invention provides a method of
and means for accurately making a card without 10 material. This procedure of making the cards has
been found unsatisfactory in some respects be
?rst making a templet of the precise form and
cause it is dif?cult and expensive to make a templet
dimensions required in the card and permits the
elements in functionally precise electrical Poten
tiometers.
.
.
use of a templet somewhat inaccurate in form '
and dimensions compared with the form and di
of the precise dimensions required and when the
templet is laid on a sheet of material and used as
mensions of the card required. The invention 15 a guide for a scriber or cutting tool‘ moved along
the sheet of material and bearing against the edge
also provides a method of and means for making
of the templet the card pattern will not be ex
accurately pro?led flat templets or cams.
actly the same as the templet but will be slightly
A feature of the invention resides in a pro?ler
oversize and inaccurate in some other respects du
head equipped with a cutting tool to cut a con
20 to the di?iculty of accurately locating the temple?
toured edge of a card.
relative to the work piece and errors that are in-/\
Another feature resides in a stylus means for~
controlling the cutting tool.
Another feature resides in means provided for
troduced in the cutting process.
. ’
i
In making cards in accordance with the present
inventiton a plan of the desired card is made in
parallel adjustments in the width of the card.
Another feature resides in means provided for 25 dicating the length and thickness of the card and
the width the card should be at predetermined
supporting the cardand a, templet of the card.
points. The plan of the card is laid out on a sheet
Another feature resides in the method of mak
ing a card of required form.
of material suitable for use as a templet when
cases in order to meet certain requirements of re
provide a bolting space on the templet and allow '
out to the required form. The material used in
In the drawings:
the
templet is a matter of choice but it will be
30.
Fig. l is a view, in perspective, of a card cut
assumed merely for the purpose of describing the
ting machine including the invention, the templet
invention that the templet is made of sheet metal
and card being supported in the machine;
and is substantially rigid. It will also be assumed
Fig. 2 is an enlarged view, in perspective, of an
in the interest of simplifying the explanation of
end portion of the machine;
Fig. 3 is an enlarged top plan view of the pro 35 the invention and not in the sense of a limitation
thereof that the card will have one long ?nished
?ler head;'
straight edge and the opposite long edge or por
Fig. 4 is a front view of part of the pro?ler head
tion thereof will be of curved form. Also, that
and drawn to the same scale as Fig. 3;
at one end of the card the short edge portion is
Fig. 5 is a side view, partly in section, of the
40 straight and right angular with respect to the long
pro?ler head shown in Fig. 3;
straight edge portion. The pattern of the card
Fig. 6 is a plan view of a templet;
_is indicated on the templet material by making
Fig.7 is a plan view of a card; and
conical prick-punch marks in the' sheet metal at
Fig. 8 is a plan view of a correction chart used
predetermined spaced coordinate points and lines
in ?nish pro?ling a card.
In some precision potentiometers, now required, 45 are scribed on the material to connect with the
prick-punch marks in succession and indicate
a resistance element is employed Comprising a
more fully the outline of the templet. Spaced
card with resistance wire wound on the card.
apertures are formed in the templet to receive
The wire-wound card is supported in the poten
stud bolts by means of which the templet may be
tiometer so that a wiper contact may successive
ly engage the turns of wire On the card. In some 50 bolted in place in a card making machine. To
sistance values at predetermined points on the
resistance element the card is made so that one
long edge portion is not parallel with the other
but is of a predetermined curved form so that the
forming therein of the apertures for the stud
bolts the templet is made wider at all points than
the card by some ?xed dimension. Thus, at any
point. the width of the templet is approximately _
42,412,019
3
-
.
-
equal to the width of the delsired card plus the
"fixed dimension which has been added'to provide,
space for the clamping‘ apertures. After the pat
tern of the card is laid out and clearly indicated
on the templet material the templet is cut from
the sheet metal by sawing slightly outside the
scribed lines, care being taken to insure that the
-
'
4
located forwardly of the forward edge of the
bar I8 so that the end point of bearing of one
end of the card I8 against the end stop 23 will
be forward of the forward edge of the bar I 8.
It will be seen, therefore, thatwhen the card I 6
is placed in required position on the upper sur
face of the platen I2 and so that the long straight
edge of the card I6 is against the forward edge
of the bar I8 and one end of the card, I3v is
saw does not remove the outline marks on the
material. After the templet has been cut the
edges are ?led or machined down to the scribed 10 against the peripheral edge of the end stop 23
line thereby bisecting the prick-punch marks as ' ~ the point of engagement of the-end portion of
closely as hand working will permit. When the
templet is made it is an approximate pattern of
the desired card. Although the card is held to the
closest tolerance possible in machining methods
the necessary accuracy in the templet is only that
which is possible for hand ?ling.
The templet is ?rst used in marking a, rough
the card I9 with the end stop 23 will be truly
it
right angular with respect to the straight edge
provided by the bar I8. The point of contact
establishes a reference point on the card from
which any other point along the abscissa or
\straight edge may be determined by measure
ment. One end of the bar I8 is secured to the
outline of the card on a sheet of material from
platen I2 by means of a screw 25 and a rela
which the card is to be made. The sheet mate 20 tively long block 26 is mounted on the upper sur
rial employed is a matter of choice but is usually
face of the platen I2 in parallel relation with
insulating material and quite often hard rubber
and will be hereinafter called in this speci?cation
a'sheet of insulating material.
After the templet of the desired card is made
the templet is laid on the sheet of insulating ma
terial and the outline of the card is marked on
the sheet of insulating material, the templet be
the rear surface of the bar I8.
I
L-shaped bars 21 are provided to retain the
card I9'in required place on the platen I2. Each
bar 21 is mounted on a stud bolt 20 and com
prises a relatively long straight leg portion 28
' terminating at one end in an angularly disposed
foot portion 29. The leg portion 28 is provided
ing used as a guide for the marking tool. The
with an elongated aperture 30 to accommodate
sheet of insulating material is then cut along 30 a stud bolt 20 and the leg portion 28 is disposed
the marked lines to obtain a card having, in gen
between the nut 2| and the nut 22 which coop
eral, the outline of the card required but approx
erate with the stud bolt 20 to hold the bar 21 in
imately one-eighth inch greater in width. Two
or more cards are made in this manner and the
cards are subsequently ?nish pro?led in the card
cutting machine of the present invention.
The card cutting machine as shown in Fig-1
adjusted position. The foot portion 29 extends
downwardly toward the upper surface of the
platen I2 and may be clamped down into en
gagement with a block'3l disposed between the
lower end of the foot portion 28 and the upper
surface of the card I9. The long block 26 is lo
' thereon to support a platen I2 which is arranged
cated rearwardly of the stud bolts 26 and serves
to slide along the tracks II. The platen I2 is at 40 as a rest for the portions of bars 21 extending
tached to an apron I3 which extends over. the
rearwardlypfthe stud bolts 20.
front portion of the machine and is operable
An elevated platform 32 supported on posts 33
lengthwise of the machine by means of a lead
and 34 is mounted on the platen I2, the platform
screw I4, the apron I3 having means, not shown,
32 being located above the plane of the platen
but supported therein and engaging the lead 45 I2 and extending lengthwise of the platen I2
screw I4 and the lead screw I4 being driven by
and in parallel spaced relation therewith. The
means of a motor and gears, not shown, but which
platform 32 is located above and rearwardly of
may be located in a driving head I5. The apron
the position of the card I9 and provides a means
I3 is also equipped with means to release the
of support for a templet 35. Spaced stud bolts
apron and parts contained therein from driving 50 36 equipped with ?anged nuts 31 are mounted on
engagement with the lead screw I4. Manually
the platform 32 to hold the templet 35 in posi
operable means comprising a handle I6 sup
tion. A plate 38 apertured to accommodate the
ported on the apron I3 and a rack I1 attached to
stud bolts 36 is supported on the platform 32 and
the bed III are provided to move the platen I2
on the plate 38 a ?at strip 39 also apertured to
along the tracks II, the handle I6 being gear 55 accommodate the stud bolts 36 is supported to
connected to the rack I1 by means of a pinion,
serve as a rest for the templet 35, the strip 39
not shown, but having mechanical connection
being narrower than the templet 35 and serving
with the handle I6.
to hold the templet 35 above the plane of the
Extending lengthwise of the platen I2 and se
plate 38. A back wall 40 extends along the rear
cured to the upper surface thereof is a ?at bar 60 of the platform 32 to provide a straight edge for
I8 which serves as a straight edge against which
one long edge of the templet-35. Removably
the long straight edge of the card I9 may be
mounted on a pin 4I extending upwardly from
placed. The bar I8 is apertured at spaced points
one end portion of the strip 39 is an annular
to accommodate stud bolts 20 mounted on the
end stop 42 for one end of the templet 35 and a
platen I2 and arranged to extend upwardly
rectangular bar 43 secured by means of screws 44
through the apertures in the bar I8. ‘The stud.
to the platform 32 is provided as an end stop
bolts 20 are equipped with nuts 2| and 22, the
for the plate 38. The point of contact estab
nuts 2| serving in cooperation with the stud bolts
lishes a reference point on the templet corre
20 to hold the bar I8 in place on the platen I2.
sponding to a similar point on the card.
An end stop 23 of annular form is provided near 70
Extending upwardly from, and secured to the
one end of the platen I2 to bear against one end
back of the base III are two spaced arms 45 and
of the card I9. The end stop 23 is removably
46 the upper ends of which extend transversely
supported on a pin 24 mounted on and extend
over and in parallel spaced relation with the
ing upwardly from the upper surface of the
platform 32 and the platen I2. The arms 45 and
platen I2. The pin 24 and the end stop 23 are 1 46 are stationary and serve as supports in a
comprises a bed Ill with spaced tracks II formed
2,412,619
profiler head 41 under which the platen _I2 is op
erated along the bed "I. Secured to the under
surface of the upper portions of the arms 45and
46 is an apertured plate 48 in the four corner
on the forward portion of the carriage 5|, the
bearings 11 and 18 extending forwardly of the
forward end of the carriage I5| and so that the
shaft 15 extends in parallel spaced relation with
portions of which are mounted peripherally 91 the forward end of the carriage 5|. The shaft
15 extends transversely through the outer end
grooved wheels 49 extending downwardly below
the under surface of the plate 48. The wheels
49 are rotatably supported on bolts 50 and coop
erate to form supporting means for a carriage
portion 14 of the lever 63 and is supported at one
end by means of an end thrust bearing 19 com
prising a screw 80 adjustably supported in a block_
5| provided with tracks 52-52 engaging in and 10 8| mounted on a support 82 by means of screws _
83, the support 82 being secured by means of
supported by the wheels 49. The carriage 5| is
screws 84 to the bearing 18. A pin 85 mounted
slidable transversely of the bed H] and the platen
l2 and provides a movable support for a motor
53 equipped with a chuck 54 in which a rotatable
cutting tool 55 is supported. The motor 53 ex
tends through an aperture 56 formed in the car-,
riage 5| and is secured to an‘ apertured mounting
plate 51 which is securely fastened by means of
screws 58 to the carriage 5|. It will be seen that
the carriage 5| is movable transversely of the
platen |2 to permit the motor 53 and the cutting
tool 55 carried thereby to be moved transversely
with respect to the bed ID of the machine and
relative to a card |9 supported on the platen l2.
The carriage 5| is normally urged toward the ~
back of the machine by means of a weight, not
shown, but which is attached to a tow line 59
extending over a pulley 68, one end of the tow line
59 being secured to a ring bolt 6| mounted on the
carriage 5| and the pulley 60 being suitably sup- -
ported rearwardly of the carriage 5|. The pulley
68 may be supported, for in'stance, on a shaft 62
extending between and supported on the arms
45 and 46 and the weight on the tow line 59 be
ing located below the upper surface of the bed III
of the machine.
A lever 63 is pivotally mounted in a bearing 64 ’
in an end of the shaft 15 and having a hemi
spherical head is located between the screw 88
and the. end of the shaft 15., A turning knob 86
is provided on one end of the screw 88 to provide
a means for turning the screw 80.
Mounted on one side of the' outer end portion
14 of the lever 63 is a ring 81 through which the
shaft 15 extends. The ring 81 is securely fastened
to the outer end portion 14 of the lever 63 and
is formed on its outer face to provide a cam sur
face 88 which is engaged by a round head portion
89 of a screw 98 mounted on the shaft 15 and
extending radially of the shaft 15. Supported on
the shaft 15 and located between the bearing 18
and the outer end portion 14 of the lever 63 is
a spring 9! which constantly urges the outer end
portion 14 of the lever-63 toward the screw 90 and
so that the cam surface 88 on the ring 91 bears
against the round head 89 on the screw~ 98. When
the shaft 15 is rotated so that the round head
89 on the screw 90 is engaged by relatively high
parts of the cam surface 88 the outer end portion
14 of the lever 63 is moved against the action
of the spring 9| and toward the bearing 181/v
This movement of the lever 63 causes the follower
supported on the under surface of the carriage
5|, the bearing 64 being secured in pace by means
16 to move further away from the center of the
riage 5|. A relatively large stem 10 is mounted
in the lever 63 and extends upwardly therefrom
into the bearing 64, the upper end of the stem 19,
the spring is also against the pull of the weight on
motor 53. When the shaft 15 is rotated to move
of screws 65 which extend through a flange 66 on ii) the screw 98 so that the round head 89 of the
screw 90 is moved into engagement with a low
the bearing and through a spacer ring 61 located
portion of the cam surface 88 the spring 9| causes
> between the ?ange 66 and the lower surface of
the lever 63 to move so that the follower 16 comes
- the carriage 5| and then into the carriage 5|.
nearer the position of the motor 53. When the
An annular boss 68 on the bearing 64 extends into
follower 16 is against the templet 35 motion be
an aperture 69 formed in the carriage 5| but
tween follower and motor against the action of
does not extend to the upper surface of the car
having an annular ?ange 1| disposed in the aper- ‘
ture 69 and bearing on the upper end of the boss
68 of the bearing 64. The lever 63 comprises an
arm .12 and a relatively wide body 13. The arm
'12 extends forwardly of the forward end of the
carriage 5| and the outer end portion 14 of the
the tow line 59.
The shaft>15 may be rotated by manual oper
ation of a stylus 92 secured in a holder 93 by
means of a setscrew 94. The holder 93 is trans
versely apertured to accommodate’ a flanged
bushing 95 secured to the holder 93 by means
of screws 96 and the bushing 95 is keyed to the
shaft 15 by means of keys 91. Movement of the
holder 93 and bushing 95 lengthwise of ‘the shaft
15 may be accomplished only when a thumb
screw 98 is released from engagement with the
shaft 15, the thumb screw 98 being mounted in a
arm 12 is transversely apertured to loosely receive
a shaft 15. Supported in and extending down
wardly from the body 13 and located to the right
of the pivotal point of support of the lever 63 is
a pin 16 which will hereinafter be called a fol 60 tapped hole in the holder Y93 and projecting
- through the bushing 95 and being operable to
lower 16. The follower 16 is ‘arranged to engage
engage the shaft 15. Spacer sleeves 99 and I00
an edge of the templet 35 and will follow the edge
are mounted on the shaft 15 to prevent extensive
of the templet 35 and in cooperation with the
movements of the holder 93 lengthwise of the
templet 35 will cause the carriage‘ 5| to move
shaft 15, the sleeve 99 being disposed between
transversely of the platen |2.
_
the ?anged end of the bushing 95 and the bear
It will be seen as shown in Fig. 3 that the fol
ing 18 and the sleeve I80 being disposed between
lower 16 is located to the rear of the position of
the holder 93 and the bearing 11. To facilitate
the motor 53 and directly in line with the center
manual movement of the stylus 92 to cause ro
of the motor 53. It will also be seen in this
tation of the shaft 15 a handle |0| is provided
?gure that the lever 63 maybe operated in the
on the stylus 92, the handle |0| extending
manner of a bell crank lever to move the follower
through a transverse aperture formed. in the
16 relative to the motor 53 to change the dis
tance between the follower 16 and the motor 53. v
The shaft 15 is supported in spaced bearings
11 and 18 extending from a support 19 mounted
stylus 92.
'
The mechanical means for moving the fol
lower 16 relative to the center of the motor 53
3,412,610 _
7
v
.
- to change the distance between the follower ‘I3
and the cutting tool 55 and involving the stylus
92, the stylus holder'93, the shaft ‘I3, the screw
89, the cam ring 81 and the lever 63 is construct
ed and arranged so that the distance of move
ment of the follower ‘I6 will be much less than
the distance of corresponding movement of the
lowermost end of the stylus 92. The ratio will
depend on the form and arrangement of the
.
8
-
sent the curved edge of the templet 35 and the
correspondingly curved edge of the card cut in
accordance with the templet. The line I03 is
made by means of the stylus 92 which is ar
ranged to press downwardly on the correction
sheet I04 when the machine is operated to make
the platen I2 carry the correction sheet I04‘
under the stylus 92. The line I03 may be simply
a scratch mark made on the correction sheet
lever 63, the form of the cam surface 83 on the 10 I04 by the point of the stylus 92. A more readily
ring 81 and the distance the lower end of the
stylus 92 is from; the axial line of the shaft 15.
distinguishable line I 03 may be made however
by placing a sheet of carbon paper between the
In an actual set-up of the machine now made
point of the stylus 92 and the upper surface of
theratio is 75 to 1 and it will be assumed merely
the correction sheet I04 and so that the stylus
for the purpose of further explaining the inven 15 92 and the sheet of carbon paper-will cooperate
tion and not in the sense of a limitation thereof
that the follower ‘I6 vis moved one‘ seventy-fifth
of the distance the lowermost point of they stylus
to produce a carbon line on the correction
sheet I04.
The machine is ?rst operated to make the
92 is moved transversely of the platen I2. '
curved edge on the card conform to the curved
A thumb screw I02 mounted in a tapped hole 20 edge on the templet and to make the line I03
in the bearing '11 and operable to engage the
shaft ‘I5 is provided to hold the shaft ‘I5 againstv
rotational movement. When the thumb screw
- on the correction sheet I04.
In this case the
templet 35 is secured in required position on the
elevated platform 32, the card I9 is secured in a
I02 is tightened to hold theishaft 15 against
corresponding position on the platen I2, the cor
rotational movement the stylus 92 cannot be op 25 rection sheet I04 is mounted forwardly of the
erated to cause movement of the follower ‘I6.
card I9 on the platen I2 and the shaft ‘I5 is held
In this case a forward movement of the follower
against movement by means of the thumb screw
‘I6 will cause a corresponding movement of the
I02 and the screw 80. Under this condition the
carriage 5| and the stylus 92.
follower ‘I6 bears against the curved edge of the
The turning knob 86 and the screw 80 provide 30 templet 35 and the cutting tool 55 bears against
a means/for initially adjusting the lever 63 to
the curved edge of the card I9 since the carriage
set the follower ‘I6 at a required distance from
5I is urged toward the rear of the machine by the
the position of the cutting tool 55, the thumb
weight on the end of the tow line 59.
screw I02 being loosened to permit longitudinal
When the machine is operated with the parts in
movement of the shaft ‘I5 prior to turning the
the condition above indicated and the motor 53
knob 86., Turning of knob 86 and screw 80 also
is operated to rotate the cutting tool55 the curved
permits ?xed parallel adjustment to be made in
edge of the card I9 is accurately pro?led to con
the width of the card independently of the op
form to the curved edge of the templet 35 since
eration of stylus 92. In high accuracy potenti
the platen I2 is moved lengthwise of the machine
ometers such adjustments are necessary to com
under the action of the lead screw I4 and the
pensate for variation in the card thickness. The
cutting tool 55 is rotating and bearing against
knob‘ 86 "may be graduated to obtain .001 inch
the curved edge of the card I9 while the carriage
increment changes in the distance: between the
5I is, in effect, cammed by means of the templet
follower ‘I6 and cutter 55.
.
‘\
35 against the action of the weight on the tow
45
The stylus 92 may be used to perform two
line 59. The stylus 92 makes the line I03 on
functions one of which is to make a line I03 on
the correction sheet. I04 since the correction sheet
a sheet I04 supported on the platen I2,- the sheet
I04 is moved under the stylus 92 while the stylus
I04 being later used as a plan of correction in
92 is hearing against the correction sheet IN
pro?ling the card. The other function of the
or against a piece of carbon paper laid over the
stylus 92 is to follow a correction line I05 made 50 correction sheet I 04. The line I03 corresponds
on the sheet I04 and showing in magni?ed form
to the curved edge of the templet 35 'since the
corrections that must be made in the card orig
stylus 92 is moved under the action of the car
riage 5I.
'
inally produced in order to make the card sat
isfactory for the requirements.
After the card I 9 has been pro?led and the line
The sheet I04 is shown in Fig. 8 and will here 55 I 03 has been made on the correction sheet I04
inafter be ‘called the correction sheet I 04 and
in the manner above described the bars 21 are
may-be a rectangular sheet of paper or other
loosened by suitably turning the nuts 22 and the
material suitable for having records made
card I9 is removed from the machine. The card
thereon. The correction sheet I04 is of su?i
I9 is then measured for width at certain pre
cient length and width to have made thereon a 60 determined points and notations are made of
pattern of the curved edge of the templet 35 and
any differences in the width of the card at these
indications in magni?ed form of changes to be
‘points from what is required in the desired card.
made in the curved edge of the card cut in ac
The card is usually found to be a few thousandths
cordance with the templet.
Of an inch too wide or narrow at the points meas
The correction sheet I04 is placed on the 65 ured since the templet 35 in being made is not
platen I2 forwardly of the positions of the card
I9 and the templet 35 and so that it will pass
under the stylus 92 when the platen I2 is moved -
?led to the precise limits required'in the pro?le
of the card and other errors are introduced in
~mounting the templet in the machine and in
lengthwise of the bed I0 of the machine, the
the cutting process. Spaced lines are made on
correction sheet I04 being secured in place by 70 the correction sheet I04 to indicate thereon the
means of some adhesive material. A convenient
points at which the card I9 is measured. The
way of securing the correction sheet I04 in place
lines just previously mentioned extend directly
is to apply strips of adhesive tape to the cor
across the correction sheet I 04 from one long
rection sheet I04 and the platen I2. A line I03
edge portion to the other and cross the line I03
is made on the correction sheet I04 to repre 75 and may be any number required to indicatethe
2,412,019
9
.
points at which the card I9 is measured. In
Fig. 8 the lines are numbered I06 to I43, inclu-i
sive, and indicate that the card I9 has been '
10
the curved edge of the templet 35. Under this
condition the cutting tool 55 operates to cut
material from the engaged edge of the card to
an extent permitted by the follower ‘I6 and its
measured at 38 points and that some of the points
of measurement are closer together than others. 5 instant point of engagement on the templet 35.
Wherever the card I9 is found to be overwidth
When the follower ‘I6 is moved nearer the cut
a dot is made on the correction sheet I04 to
ting tool 55 more material will be cut from the
indicate at what point the card I9 is overwidth
edge of the card than when the follower ‘I6 is
more distantly positioned from the cutting tool
and how much the card I9 is overwidth at this
point. The overwidth indications are magni?ed 10 55. By manually keeping the stylus on the cor
with respect to the actual overwidth measure
rection line I05 the operator controls the posi
ment in order that the operator of the machine
tion of the follower ‘I6 relative to the cutting
tool 55 and consequently the depth to which the
may more readily see at what point the card I9
is overwidth and how much the card is overwide . cutting tool .55 cuts the edge of the card. As
at the points indicated. The magni?cation will 15 suming as above explained that the ratio of move
\ment of the stylus 92 and the resultant effect on
be of the same order as is obtained in the move
ment of the stylus 92 relative to the movement
the cutting tool 55 is ‘75 to 1 an inward move
of the follower ‘I6 under the action of the lever
ment of the stylus 92 toward the cutting tool
5-5 seventy-?ve thousandths of an inch will in
63. It will be assumed as above mentioned that
the ratio is 75 to 1. Under this condition the 20 crease the depth of cut made by the cutting tool
overwidth indications are shown as magni?ed‘ '75
55 in the edge of the card one thousandth part of
to 1 and a one thousandth of an inch overwidth
an inch. It will be seen, therefore, that as the
of the card I9 at any predetermined point will
platen I2 is being driven along the-bed of the
be indicated as seventy-?ve times that at a
machine 'to move the card and templet longi
corresponding point on the correction sheet I04. 25 tudinally the cutting tool 55 will pro?le the en
gaged edge of the card I9 and the depth of cut
For instance, at line I06 the card I9 is correct in
width and at certain other points the card I9
will be changing in accordance with the move
is overwidth one seventy-?fth of the amount in
ments imparted to the stylus by the operator.
‘ The operation of the rotating cutting tool 55
dicated by the line I05 which is drawn to connect
the dots made‘on the lines I06 to I43 in order 30 against the edge of the card I9 creates dust—like
that an operator of the machine may more
particles of material cut from ‘the card I9. To
readily see the error indications and guide the.
prevent an accumulation of the dust-like particles
stylus 92 to the points required when the card
on the cutting tool 55 and on the edge of the
I9 is being ?nish pro?led.
'
card I9 a vacuum cleaner apparatus may be
In ?nish pro?ling, another card I9 is placed 35 employed, the nozzle I45 of the vacuum cleaner
' in the exact position in the machine as the pre
apparatus being mounted on the carriage 5| of
vious card and the bars 2'Iv are operated to hold
the pro?ler head 41 and relatively close to the
the card I9 in place. The thumb screw I02 is
cutting tool 55.
'
operated to release the shaft ‘I5 for rotation, the
We do not consider our invention to be limited
shaft ‘I5 being manually rotatable by means of
to the particular machine or'form of the parts
the stylus 92. The stylus 92 is moved to clear the
shown and described since other means may be
point from the correction sheet I04 and turn the
employed for the same purpose, but only by the
shaft ‘I5 so that the low portion of the cam ring
appended claims.
0‘! is engaging the head 89 of the screw 90. The
What is claimed is:
platen I2 is then moved along the bed I0 by 45 '1. A machine for cuttingan edge of a card
manual operation of the handle I6, the apron
to a precise predetermined pattern comprising a
I3 having been previously unclutched from the
support for the card, a support for a templet
lead screw I4. When the platen I2 has been
of the card, a carriage operable to move trans
moved to bring the card I9 and the templet 35
versely of the card, means to urge said carriage
to a required starting point and the operator is 50 toward the support for the templet, means to
ready to ?nish pro?le the card I9 the apron I3
cause relative movement of said supports and
is clutched to the lead screw I 4, by manual op
said carriage, a cutting tool and a driving means
for said cutting tool supported on said carriage,
eration of the handle I44. The stylus 92 is then
placed on the beginning of the line I05 and the
a lever pivotally supported on said carriage, a’
machine is started to ?nish pro?le the card I9.
55 follower supported on said lever and spaced from
While the machine is operating to ?nish pro?le
said cutting tool, said follower being operable to
bear against the templet to control the engage»
the card, the stylus 92 is manually held by the
operator graspingthe handle I III and the oper;
ment of said cutting tool against an edge of the
ator keeps the stylus 92 on the correction line ' card and a manually operated stylus carried by
I 05 on the correction sheet I 04 during this second 60 said carriage and mechanically connected to said
operation of the machine. when the point of
lever and operable to move said lever to change
the stylus 92 is swung inwardly toward the cut
the spacing of said follower relative to said cut
ting tool 55 the shaft ‘I5 is rotated so that the
ting tool.
round head portion 89 of the screw>90 moves
2. A machine for ?nish pro?ling an edge of
toward a low portion of the cam surface 88 65 a card to a precise predetermined pattern com-.
allowing the spring 9| to move the outer end _
prising a support for the card, a support for a
portion ‘I4 of the lever 63 toward the left of
templet of the card, a pro?ler head extending
the position shown in Figs. 3 and 4. This move
over and in spaced relation with said supports,
ment results in a movement of the follower ‘I6
means to cause relative movement of said sup
toward the cutting tool 55 and therefore reduces 70 ports and said pro?ler head,’ a carriage slidably
the distance of the follower ‘I6 from the cutting
supported in said pro?ler head and operable to
tool 55. Since the carriage 5I carrying the lever
move transversely of said supports, a cutting
63 and the motor 53 is being urged rearwardly
tool and means to drive said cutting tool sup
ported on said carriage, means to urge said car
of the machine under the pull of the weight on
the tow line 59 the follower ‘I6 is kept against 75 riage toward the support for the templet, a
2,412,019
lever pivotally supported on said ‘carriage, a fol- ''
' lower supported on said lever and operable to
bear against the templet, said follower being
spaced from said cutting tool, a rotatable shaft
supported on said carriage and extending trans
versely through'said lever, a cam on said lever,
‘means on said shaft and engaging said cam to
move said lever in one direction when said shaft
is rotated. in one direction, means to return said
lower relative to said cutting tool to make said
cutting tool ?nish pro?le the edge of the card ac
cording to the correction line on the correction
sheet.
‘
t
6. A machine for pro?ling an edge of‘a card
according to a templet of the card and for‘?n
ish pro?ling the edge of the card according to
a correction line made on a correction sheet and
showing in proportionately magni?ed form errors
lever to normal position when said ‘shaft is ro 10 found in the form of the edge line of the card
comprising supporting means for the card, the
tated to normal position and a stylus supported
templet and the correction sheet, a pro?ler head,
on said shaft and manually operable to rotate
means to cause relative movement of said sup
said shaft to change the spacing of said follower
porting means and said pro?ler head, acutting
»
3. A machine for pro?ling an edge of a card 15 tool carried in said pro?ler head and operable to
cut the edge of the card, a follower carried in said
comprising means to support the ‘card, means
pro?ler head in variable spaced relation with said
to support a templet of the card, a carriage, a
cutting tool and operable to engage the templet,
cutting tool carried by said carriage and operable
a stylus carried by said pro?ler head and oper
to cut the edge of the card, a follower carried
by said carriage, said follower being spaced from 20 able to engage and follow the correction line on
the correction sheet and means forming a me
said cutting tool and being operable to engage
chanical driving connection between said stylus
the templet to control the operation of said cut
and said follower and operable to transmit move
ting tool inv accordance with the templet, means
ments of said stylus to said follower to change the
to urge said carriage and said follower toward
said templet and a manually operable stylus 25 spacing of said follower relative to said cutting
tool in required reduced proportions to make said
carried by said carriage and mechanically con
cutting tool pro?le the edge of the card correct
nected to said follower and operable-to change
ly and in required proportion to the errors found
the spacing of said follower relative to said cut
in the card and indicated in magni?ed form by
tin? tool.
‘
'
from said cutting tool,
’
4. A machine for ?nish pro?ling an edge of a 30 the correction line shown on the correction sheet.
7. A machine for pro?ling an edge of a card
according to a templet of the card and for later
?nish pro?ling the edge of the card according to
a correction sheet having a line thereon showing
I card, a carriage extending over said platen and
platform and movable transversely of said platen, 35 in proportionately magni?ed form errors found
in the form of the edge line of the card compris
a cutting tool operable to rotate against an edge
in'g supporting means for the templet, the card
of the card to pro?le the edge of the card, a mo
and the correction sheet, a pro?ler head extend
tor supported on said carriage and carrying said
ing transversely of and in spaced relation with
cutting tool, said motor being operable to rotate
said cutting tool, a pivotally supported lever car 40 said supporting means, means to cause relative;
movement of said supporting means and said pro-‘"
ried by said carriage, a follower supported on said
lever and operable to engage the templet to con
?ler
said head,
pro?ler
a motor
head and
driven
operable
cuttingtotool
cutcarried
the edge
trol the movement of \said carriage transversely
of the card, a follower carried in said pro?ler head
of said platen, said follower being spaced from
said cutting tool, means to urge said carriage in 45 in spaced relation with said cutting tool, said
follower being arranged to engage said templet
a direction to keep said follower against the tem
_ and being operable to move relative to said cut
plet, a rotatable shaft supported on said carriage,
ting tool, a manually operable stylus carried by
a cam mechanism mechanically connecting said
said pro?ler head and in spaced relation with
shaft to said lever, and a manually operable stylus
card comprising a platen to support the card,
means to move said platen longitudinally, a plat
form on said platen to support a templet of the
supported on said shaft and providing a means to 50
‘
said cutting tool, said stylus being operable to
manually rotate said shaft to change the spacing
of said follower relative to said cutting tool.
traverse the correction sheet and move relative
to said cutting tool, means forming a mechanical
5. A machine for pro?ling an edge of a card
out according to a templet and for ?nish pro?ling
the‘ edge of the card according to a correction
sheet having a correction pattern thereon com
prising supporting means for the card, the tem
plet and the correction sheet, a head supported
driving connection between said stylus and said
follower and operable to transmit movements of
said stylus to said follower to change the spacing
of said follower relative to said cutting tool in re
quired reduced proportions to make said cutting
tool pro?le the edge of the card correctly and in
required proportion to the errors found in the
~ in spaced-relation with said supporting means,
means to cause relative movement of said support 60 card and shown in magni?ed form on the‘correc
and operable transversely of said supporting
tion sheet and releasable holding means for said
stylus to hold said stylus against movement rela
means, a cutting tool and means for ‘operating
tive to said cutting tool.
ing means and said head, a carriage in said head
' said cutting tool carried by said carriage, a fol
I
8. A method of making a card of precise form
lower spaced from said cutting tool and movably 65 and dimensions from sheet material comprising
making a rough templet of the card required, cut
supported in said carriage, said follower being op
ting a card from sheet material, in accordance
erable to engage thetemplet, means to urge said
with the templet, measuring the card from point
'carriage in a direction to keep said follower
to point and making notations of errors found
against the templet, a stylus carried by said car
riage and operable to follow the correction pat 70 in the dimensions of the card at the points meas
ured, preparing a pattern of an edge of the card,
tern on the correction sheet, a motion transmit
making a line on the pattern to indicate in mag
ting mechanism between said stylus and said fol
ni?ed form and in comparison with the pattern
lower and serving to mechanically connect said
‘of the edge line of the card, the errors found in
stylus to said follower and said stylus being man
ually operable to change the spacing of said fol 75 the form of the edge line of the card and ?nish
-‘ 2,419,619
13
>
ing on’ the edge of the card to make the card have
the required form and dimensions while observ
ing the errors shown by the line in magni?ed form
on the pattern.
b
connection with said movable lever support, said
stylus means and said movable shaft means be
ing cooperable to move said movable lever support
to continuously vary the distance between said
follower and said cutting tool to correct errors de
precise predetermined pattern comprising a sup
termined by measurement of a test card in cut
port for the card, a support for a tempiet, a cut
ting subsequent cards, and adjustable setting
ting tool operable to engage and cut an edge of
means in engagement with said movable shaft
the card, means to operate said cutting tool, means
means and operable to move said shaft means to _
to cause relative movement of said supports and 10 superimpose a ?xed change in the distance be
' said cutting tool, a follower spaced from said cut
tween said cutting' tool'and said followerinde
ting tool and‘engageable with an edge of the tem
pendently of the distance varying action of said
plet to limit the depth said cutting tool may cut
stylus means.
_
’
.
the edge of the card, a movable lever support for
WILFRED J. KINDERMANN._
9. A machine for cutting an edge of a card to a
said follower, stylus means, movable shaft means 15
supporting said stylus means and in mechanical
WALTER W. WERRING.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 276 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа