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Патент USA US2406043

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Àug. 20, 1946.
0, E, SQRENSEN _
2,406,043
FIXTURE FOR HOLDING ÀND MEASURING WORK AT SELECTIVE ANGLES-
Filed oct.~ 31,> 1942
5 sheets-sheet 1
INVENToR
¿L
Y
\TEY
l
`
Aug- 20,- 1946.
o. E. SORENSEN,
l
2,406,043
FIXTURE FOR HOLDING AÑD MEASURING WORK AT SELECTIVE ANGLES
Filed oct. s1, 1942. _
¿sheets-sheet 2
00g. 20,1040
o. E; 'SORENSEN
'
' 2,400,040`
FIXTURE FOR HOLDING ANDl MEASURING WORK AT SELECTIVE ANGLES
- INVENT'OR
ATTORNEY
"
Patented Aug. 20, 1946
2,465,043
UNITED STATES PATENT OFFICE
2,406,043
FIXTURE FOR HOLDIN G AND MEASURING
WORK AT SELEC TIVE ANGLES
Otto E. Sorensen, Fairiìeld, Conn.
Application October 31, 1942, Serial No. 464,052
l
y22 oiaims. (ci. ca_-1m
2
This invention relates to an improved organi
zation of movable parts in a fixture of unitary
nature for measuring, testing or laying out a
work piece, and particularly relates to a fixture
of this type adapted to hold and swing the work
to different angles relative to the true horizontal
>planes ,5_-5 in Fig. 2 looking in the direction of
the arrows.
Fig. 6 is an enlarged view of a forward central
portion of Fig. 3.
Fig. 7 is an enlarged View partly in side _eleva
which angles may then accurately be ldetermined
by the familiar sine-bar principles of measure~
ment and computation.
The herein disclosed construction of such a fixu io
ture may be compared with a related form ci
fixture described and claimed in my copending
application, Serial No. 294,489, ñled September
12, 1939, on which U. S. Patent No. 2,345,312 was
granted March 28, i944. In Athe fixture .of said
copending application, as well as herein, there is
tion looking from the left at Fig. 2 showing most
of the fixture in central vertical section on the
planes 8_8 in Fig. 2.
Fig. 8 is an enlarged exploded perspective View
of the 'staying clamp of ,the micrometer adjust»
ment.
‘
.
Fig. 9 is an enlarged View of the .Central p0r
tion of Fig. 2 drawn on the same scale as Fig. 7
showing certain structure partially broken away.
Fig. 10 is an enlarged fragmentary View taken
in section .on ythe plane iii-_lil in Fig. 2 showing
provided a composite rotatable work support and
improved construction in locking plug details.
means to stay the component parts thereof
Fig. 11 is a greatly enlarged perspective view `
against relative or absolute rotary movement.
of
a split cup for retaining the lock plug.
The composite work support still includes a work 20
Fig. l2 shows one of the Aclamps andfragments
holding plate but »according to the present im
of associate members on which it vacts viewed as
provements it is aimed to stay the rotatable plate,
indicated by arrow A in Fig. 7.
on which the work piece is .directly secured,
Fig. 13 shows another clamp and associated
structure viewed as indicated -by arrow ¿B in Fig. 5.
Vagainst absolute rotary movement (movement in
relation to frame) without dependence for this
function upon the fixation of an associated angie
measuring wheel.
Fig. 14 is a view showing a modification of _the
construction in Fig. 'l drawn on a scale ,similar to
Fig. 1 and showing most of Y.the parts in section
Also in the present improvements it is an ob
on the divergent planes lll-lâ `in Fig. 1_5.
ject to afford micrometer adjustment of the ro
Fig. 15 is a rear View `comparable with Fig. 2,
ta-ry position of the work holding plate with re 30
looking from the right `at the modified form of
spect to the frame without dependence for this
measuringv fixture shown in Fig. lli.
f
function upon the aforementioned measuring
Fig. y_16 is a plan View of the _modiíied fixture
wheel.
shown in Figs. 14 and l5.
Other objects are to provide a maximum effec
tive overall length forvthe bearing support given 35 Fig. l'l is lan enlarged fragmentary view taken
in section on vthe plane ,il-.fil inV Fig. ifi looking
to the work holding plate and to improve the
in
the direction of the arrows.
readiness of manipulation and the holding power
Fig. 18 is an ~enlarged fragmentary view of a
of various clamping devices employed to arrest
portion of the structure shown in Fig. 14 incor»
certain rotatable parts.
porating
_still further modification.
'Y
With these and other objects in View which are 40
Referring to the drawings, the angle base or
made clear hereinafter there is shown in the
support base of the illustrated sine bar _fixture is
appended drawings an illustrative embodimentI of
designated as a whole by lil Àand consists of a
the present improvements which are described in
base Wall H . an upright Centrally aperture@ Sup
greater detail hereinafter.
In the drawings:
Fig. 1 is a front view of a measuring and layout
fixture embodying the present improvements
45
port VWall l2, bracing >side walls I3, and a cen
trally located rigid bail-shaped handle "l bridg
ing the angle embraced _by _base wall H and up
right wall I2. Base wall l l contains elongated
showing a sample of work piece clamped thereon.
slots l5 which may in some uses lof ¿the fixture
Fig. 2 is a rear view of the same layout fixture.
accommodate fastening bolts (not shown) that
can extend upward through slots >iii from some
Fig. 3 is a plan view of the same layout fixture.
customary anchorage, _such as conventional vT
Fig. 4 is an enlarged fragmentary view taken in
shaped grooves in a vmrfichine tool bed orcarriage.
section on the plane 4_4 in Fig. 2 looking in the
But whenk used for laying out work atl the bench,
direction of the arrows.
Fig. 5 is an enlarged fragmentary view on the 55 such slots will not be .needed because th'elbot
to'mfof base Wall Il is nicely ñnished to forma
‘2,406,043
4
turning will merely tend to draw nut 4I toward
smooth planar surface interrupted only by cored
the left in Fig. 7 because of the different hand
of the threads on :the nut in relation to the
threads on the plate, and will thus defeat all
tendency of clutch plate 39 to work loose on hub
34. Clutch plate 39 further includes a relatively
channels such as IB for lightening the fixture
without detracting from its strength. Fig. 7
shows the complete stability with which the en
tire fixture will be supponted by its base wall Il
whether or not bolted down. Thus the fixture is
thin, springy, diaphragm-like web 42 carrying a
circularly com-plete peripheral rim 43 whose
front and back faces afford frictional surfaces
adapted to rest stably upon any conventional
shop surface plate S (see Fig. 2), preferably of
greater area than the base wall I l, so that meas
and are adapted at times to be forced tightly to
uring devices such as gage blocks or a height 10 ward a clutch drum 58 for holding the angle
gage whose sensing finger 33 is indicated by
measuring wheel 32 rotatably fixed with the work
broken lines in Figs. 1 and '1, may stand beside
support plate I8.
V
the fixture upon the same surface plate and c0
As in the case of the member termed “carrier
operate with sine buttons hereinafter referred to
ring” in the disclosure of my before mentioned
for accurately measuring distances upward from 15 copending application, the present form of meas
said surface plate. Three bosses l1 are provided,
uring wheel 32 has four niches 11 sunk in its
one on the handle I4 and two others on the
front face and which open radially outward
rear edge of base wall ll, so that together the
through the chamfered peripheral edge of the
coplanar, nicely finished, outward directed faces
wheel. Within each of these niches there pro
of these bosses provide stable three-point sup 20 jects forward from the floor of the niche, but
port for the measuring ñxture as a whole when
preferably not beyond the frontmost face of
it rests on the surface plate with its -work holding
measuring wheel 32, the end of a hollow sine plug
plate I8 facing upward in horizontal position in
18 variously termed in this art, a sine button,-sine
stead of facing laterally in vertical position.
pin or sine stud. For that part of its, function
Upright wall l2 is of dislied formation 25 which consists in being contacted by a measur
strengthened by ribs 24 which radiate from a
ing instrument to determine angles, it is not nec
hub-like central Vwall section bored through to
essary that a portion of the length of the sine
receive bearing means in the form of a fixed cy
stud be embedded in the structure of the meas
lindrical bearing bushing i9. Also at a border
uring wheel. The sensing finger 83 of a conven
eo
point in wall l2 there is embedded the tubular
tional height gauge assumed to stand on, say,
bushing 21 which serves as a slide bearing or
the surface »plate 9, is admitted into tangential
orientation hole for a lock plug 28 best shown in
y contact with sine plug 18 within niche 11 in the
manner shown in Figs. 1 or ’1. In the construc
Figs. 2 and 10. Further details of this lock plug
and its bearing construction are described here
inafter.
The peripheral surface of a measuring wheel
32 is formed with a rabbet onto which is heat
tion shown, however, each plug 13 comprises a
35 bushing ñxedly lodged in a hole extending clear
through the marginal portion of the measuring
wheel and as shown in Figs. '1 and 10, the hol
low at the rear end of each plug opens into yac
shrunk a metal hoop 33 one edge of which pro
jects rearward from wheel 32 into registeringv
association with'an index or “zero” indicium ¿23
curate register with end of the hereinbefore
mentioned slide bearing bushing 21 containing
lock plug 28. The hole through each sine plug
or with associated Vernier indicia 30 all marked
on the top edge of the front wall l2 of angle base
l0. Angle measuring indicia 31 may be marked
around the full circle of hoop 33 which may be
of steel adapted to stand the stamping of indicia
is continuous and truly round and is truly con
- i
marks therein better than does more brittle cast
iron of which wheel 32 might be made.
‘The angle measuring wheel 32 is secured to a
hub or hollow cylindrical trunnion 34 «through
threaded engagement with the left end of the
latter as Ashown in Fig. '1.
In assembling these
centric with the outside cylindrical surface of the
plug. The sine plugs may be spaced 90 degrees
apart with respect to the center of rotation of
the measuring wheel, and the center of one of
them exactly lines up radially with the “zero”
mark 3l of the angle denoting indicia which are
marked on scale ring 33. To keep dirt and for
eign substances out of that pant of the hollow
interior of the sine plug to which is admitted the
parts the wheel is first screwed up tightly against
lock plug 28, a stopper disc 19 is fìxedly lodged
the flange 33 of its hub and is then locked against
within the sine plug and serves to partition its
backing off by pins such as 36. This measuring
interior as shown in Fig. 10.
wheel and hub are thus ñxed together to com
A useful feature of construction for prevent
prise a unitary wheel structure journaled in the
ing removal and loss of the lock plug 28 con
main bearing bushing I9. Toward its right end
sists in the split plug-retaining shell 44 which,
in Fig. '1 hub 34 is given >a reduced diameter 31
as shown in Fig. l0, has separable mating halves
carrying right-handed threads and also a further
fitting together about a reduced diameter por
reduced diameter 38 carrying left-handed threads 60 tion 45 of the lock pin 28. Shell 44 is inserted
at its extreme end.
together with the plug into the rear end of the
A clutch plate 39 containing a right-handed
bore in wall l2 in endwise relation to slide bush
threaded central bore screws onto the threaded
ing 21.- Shell 44 may be saw-cut diametrically
diameter 31 of hub 34 and tightly against’the
as at 46 along a portion of its length and merely
shoulder 40. A left-handed threaded lock nut
broken apart at 41 for the remainder of its length
4l screws onto the threaded terminal 38 of hub
so that if made large enough in outside diam
34 and tightly against the clutch plate 39.
Thereby the clutch plate is locked dependably
against displacement because no force can turn
eter to afford a press ñt within the bushed hole
in wall l2, the act of pressing shell 44 into such
’ hole will not bring to bear any binding pressure
it any more tightly against hub shoulder 40, while 70 of the two halves of the split shell against the
any force tending to .turn clutch vplate 39 in a
reduced diameter portion 45 of the lock plug. The
direction to back it away from shoulder 4B or
latter is thereby assured alfree sliding fit in thetoward the right in Fig. ’1, will encounter the
bearing hole 2B through the outer end of the
resistance of nut 4l. If this results in any urge
split bushing which precludes any. entrance of
upon nut 4l to turn in the same direction, such 75
2,406,043
5
6
dirt or foreign matter. When assembled, the ex
block also carries a lug 15 containing a bearing'
hole 18 for the swivel connector pin `9‘2, best
posed end of the shell limits the extent to which
lock plug 28 can be withdrawn toward the right
in Fig. 12 but permits the plug to withdraw from
the measuring wheel 44 suii‘iciently t0 free the
latter to swing rotatably. Locking plug has a very
snug but free sliding lit within both sine plug 18
shown in Fig. 3, whose head has threaded en
gagement with an adjustor screw 84.
Adjustor screw 84 is for providing a ñnely con
trollable micrometer setting of the shoe block 63
along the path of movement of the periphery oi‘
clutch drum 58. One of the reinforcing ribs 88
The work holding plate or face plate I8 has
a central aperture threaded and counterbored 10 of the angle base is provided with a rearwardly
extending boss 8| which is bored therein from
to be received onto the left end of a shaft 48,
the rear and receives the cylindrical shank of a
which left end in Fig. 7 is shown in threaded
hinge stud 82 whose head affords axial thrust
engagement with this plate aperture andis shown
bearing for the Unthreaded shank of adjustor
to have a ñange 49 occupying a counterbore in
the latter. Flange 49 is further secured to plate 15 screw 84. This shank terminates in a thrust
Ilange 81 and has an operating hand knob B8 se
I8 by pins 58. Shaft 48 thus forms part of a
cured thereto by a tapered pin 89. This shank
trunnion-like structure fixed on face plate I8.
of hinge stud 82 is free to rotate in boss 8| and
The opposite end of shaft 48 is journaled in a
bearing bushing 5I lodged in a hole through an . is maintained therein by means of its circular
groove 98 with which the end of a set screw 9|
enlarged section 28 of handle |4 which hole is
retainingly engages.
counterbored at 52 to provide a shoulder against
Fig. 5 shows preferred construction of a clamp
which a cupped spring washer 53 is pressed at its
ing device for staying the clutch drum 58, and
peripheral edge by the thrust nut 54. This nut
thereby the work holding plate I8, with more per
is in threaded engagement with the end of the
shaft and is adjustably turnable by means of 25 fect ñxity in any of its universal rotative posi
tions than is attainable solely through the a"
wrench holes 55.
, tion of adjusting screw 84 whose
Midway its length, shaft 48 has a stepped sec
associated mov
able parts require some working clearance, how
tion 56 provided with right-handed threads and
ever small. A ñllet 93 extends between two of
an adjoining stepped section of slightly smaller
and bushing 21.
`
diameter 51 provided with left-handed threads
at the rear thereof.
A clutch drum 58 has an
the ribs 24 and affords a seat for a bracket 94
30
which is ñxedly mounted thereon by bolts 94
and shaped to overhang the periphery of brake
internally threaded hub which screws onto the
drum 58. Although bracket 9d has an arcuate
threaded section 58 of shaft 48 and tightly against
lip 98 loosely engaging the dovetail-shaped pe
the shoulder 59. A lock nut 68 having left-hand
ed threads screws onto the shaft section 51 until 35 riphery of clutch drum 58, this alone does not
offer any resistance to the turning of the drum
it draws up tightly against the hub of clutch drum
which may thereby be free to be adjustably ro
58. In this manner loosening of the brake drum
tated past the lipped bracket 94 while in sliding
on the shaft is dependably prevented because in
contact therewith. However, a lipped clamp piece
one direction the clutch drum can not be screwed
91 is provided which is capable of being drawn
any more tightly against shoulder 59 while in
against the opposite or front edge of the dove
the other direction it will encounter lock nut Bil.
tail on the periphery of drum 58 by means of
If the drum tends to turn the lock nut it will
the draw bolt 98 whose head is pinned to clamp
only succeed in drawing the latter that much
91 at 89. Bolt 98 extends through and projects
tighter against itself because of the different
hand of the threads on the shaft sections 56 45 rearward from bracket 94 and receives a thrust
and 51.
washer |88 and has threaded engagement with a
nut-like hand-knob |8I which can be turned in
The peripheral rim of clutch drum 58 is of dove
either direction thereby to tighten or loosen the
tail shape in cross section as best shown in Figs.
\ clamp piece `91 for arresting or freeing brake drum
5 and ’l and radially inside of this peripheral
rim there are carried two clamps 8| on opposite 50 58. Thus clamp 68 or 91 united with support base
I2, together with drum 58 united with face plate
sides of the center or rotation, which serve on
I8, are examples of cooperative means excluding
occasion to force the rim 43 of clutch disc 39
measuring wheel 32 for releasably fastening the
against a planar annular surface on the web of
face plate directly to the support base.
the clutch drum 58 as a means of making this
In Fig. 1 a template |81, representative of any
clutch disc and clutch drum fast to each other, 55
werk object or work piece, is shown clamped
or relatively free, as desired. Each clamp piece
against ‘the hat upright face of plate i8 by means
8| is rigid with a bolt 82 whose head is fastened
thereto by a pin 83. The bolt projects through
of slotted straps |85 overhanging the edges of the
tutes an anchorage shoe capable of grabbing the
edge of plate |81 and holes therein are indicated
at H2.
While there are many uses to which the ñxture
of these improvements may be put, such as to
template'and drawn toward the face plate I8 by
a hole in the web of brake drum 58 to receive the
screws ||8 which can engage any of tapped holes
washer 84 and a tightening nut 85.
60 I I I in the face plate. |88 represents one straight
Fig. 8 shows a two-piece clamp which consti
clutch drum 58. Referring particularly to Fig. 8,
the springy piece 5S of this shoe is provided with
a dovetail engaging lip 61, and at ene end is iirrn 65
hold work iirmly in desired angular relations
ly mounted on a block-like piece 58 of the an
,while it is being supported and operated upon
chorage shoe by means of bolt 69. A cut-back
by a machine tool, such as milling machine,
85 in the shoe block 88 provides room for the
grinding machine, Shaper or the like, its opera
free end of spring piece 59 to be forced toward
tion will be explained particularly for measuring
the block by a tightening and loosening bolt 70 the edges, as |88, or holes
|I2 of template |01 or
18 having the radial operating handle 1I to af
ford finger leverage for the hand of the opera
tor.
Block 68 has a corresponding dovetail en
scribing layout lines upon the surface thereof.
Work piece |81 is observed to have several other
~ angularly related edges.
gaging lip 'I2 and also threaded holes 13 and 14’
Initially the tempiate or yWork piece m1 will be
to receive bolts '88 and 10 respectively. This 75
rclamped tightly and ñxedly against the vertical
2,406,043
I
,
7
face of plate I8 in arbitrary position by means’
of slotted holding straps |09 and screws H0. At
.this time the surface plate I8 may or may not be
fast to the measuring wheel 32 depending upon
the tightness with which nuts 65 are set up on
clamp bolts 32. Measuring wheel 32 may first be
locked against rotative displacement by means of
structionit was necessary to lock the measuring
wheel, or so called “carrier ring,” to the frame
of the angle support in order to lock the work
carrying face plate stationary. Herein, however,
the function of locking the work support plate I8
stationary and also the function of imparting
micrometer rotary adjustment to the work plate
I8 by means of screw 84 is entirely independent
lock plug 23 which for this purpose will be thrust
cf measuring wheel 32. Also the handle I4 is
into positive holding engagement with the rear
newly made use of herein to afford greatly in
hollow end of some one ofthe sine plugs '18. Or 10' creased axial length for the effective bearing sup
dinarily the “Zero” indicia -29 and 3| will be in
port of work supporting plate I8.
register at this'time. With measuring wheel 32
Spring washer 53 exerts a yieldable axial thrust
so locked, and nuts 65 loosened, the work holding
urging plate I8 toward the rear which thrust is
plate I3 is freed for rotative adjustment that may
borne by support wall I2 through .the medium
bring the straight edge |08 of template |01 into
of .the measuring wheel hub ñange 35 thus en
true horizontal alignment, if desired, as shown
abling all axial fits between support wall I2 and
in full lines in Fig. l. After this is done tighten
clutch plate 39 and between lock nut 4I and clutch
ing of nuts 65 will make the face plate I8 fast
drum 38 to be loose, I may dish the thin springy
to the measuring wheel 32. Thus both face plate
web 42 of clutch plate 39 and give this web such
and measuring wheel are locked stationary. This _
resilient bias in an axial direction that when the
represents a considerable improvement in speed
and accuracy as compared with the former time
plate rim 43 is clamped tightly against clutch
drum 58, it will cause an axial thrust to be ex
consuming and troublesome attempts to bring
erted on hub 34 toward the left in Fig. ’7 relative
work piece edge Iûß into true horizontal position
to the measuring wheel 32 and its hub 34 tending
by tapping it back and forth while held with only 25 somewhat to neutralize the thrust of flange 49
partial firmness by straps I 09.
against hub 34 caused by spring Washer 53 and
Lock plug 28 may now be withdrawn from
tending thus to ease the frictional resistance to
measuring wheel 32 so 1that the face plate I8 and
relative turning between face plate and measur
measuring wheel 32 may be turned in unison any
ing wheel which this spring washer sets up.
desired number of degrees away from full line 30
In Figs. 14. to 17, inclusive, a modilied form of
position in Fig. 1, as for instance to swing work
the construction is shown which dispenses with
piece Iû'I to the position represented by broken
the necessity of extending any hub or other por
lines in Fig. 1. At this stage of operation, the
tion of the modified measuring wheel structure
anchoring shoe 6l, 68, whose clamp handle lll, ’li
32’ through the modified upright wall I2’ of the
has stood loosened in order to permit turning of 35 modified angle base I3'. The parts of this mod
the clutch drum 53 in unison with face plate I3
ified fixture are in general designated by the
may be caused tightly to clutch the dovetail edge
same numerals, primed, as in Figs. l to 13, so
of drum $8 by means of said handle and clamp
that attention need only be called to the differ
the shoe iixedly to the drum. A final rotary ad
ing features of construction. It will be under
40
justment of plate 1B with micrometer accuracy
stood that parts not speciiically mentioned as so
may now be attained by turning the hand knob
differing may be constructed along lines identical
88 of adjusting screw 34 which will push or pull
with, or closely similar to, those hereinbefore de
shoe 33, 63 fine amounts to the right or left in
scribed and shown in fuller detail in Figs. l to
Fig.
When a satisfactorily accurate position
13. A laterally projecting yboss I I4 of the upright
45
ing of the work piece is thus attained, its posi
support wall I2’ carries the lock plug 28 and a
tion can be maintained positively by tightening
construction of slide bearing similar to that shown
hand knob IGI. This causes the clamp piece »91
in Fig. 10.
on frame bracket 94 to grab the periphery of
The angle base I0’ is reduced to a smaller area
clutch drum 33 and hold it positively stationed.
in its upright wall I2’ than in the case of base
In each of the above mentioned stages of han 5.01. l0 and it may be assumed that the modified work
dling work by means of my improved measuring
holding face plate I8’ and measuring wheel 32’
fixture, desired angles may be found or deter
mined with great accuracy bythe sine method of
measurement which consists in using a conven
tional height gauge, whose sensing linger 83 is
indicated in Figs, 1, 3 and 7 and which stands in
Well known manner upon shop surface plate 9, to
measure the vertical distance from the top of such
surface plate (which coincides with the bottom
surface of base wall II) to each of two diametri
cally opposite sine plugs 83 which are of exactly
equal diameter and exactly equally spaced from
the center of rotary lmovement of face plate I8.
The difference between these two vertical dis
tances divided by one half the diametral distance
between plug centers gives the sine of the angle
formed with the horizontal by a diametral line
passing through the centers of both sin@ plugs.
Such angle can thereby be known or determined
with great accuracy by trigonometric computa
tion in the well understood way.
remain of the same overall diametrical sizes as in
Figs. 1 to 13. The strengthening ribs 24’ are
correspondingly shorter, however, and terminate
at the bracing side walls I3 which are located
considerably inward of the side edges of the
modified base wall II'. An arcuate Vernier
bracket H2 is secured atop the upright support
„wall l2’ by fastening screws II3 as best shown
in Fig. 16 and carries the same index and Vernier
indicia 2‘9 and 30 for accurately measuring angu
lar displacement that appear in Fig. 6. The di
ameter of the main bearing bushing I9’ is reduced
to a size to fit the shaft -48’ directly, which shaft
is thereby journaled in bushing I9’ as Well as
being journaled also in the enlargement 2D of
handle I4’ and subjected to axial thrust by a
spring washer, all as~ shown in Figs. ’7 and 9.
ÍIn Figs. 14 to 18, inclusive, there is cut, all the
70 Way _around in the outer periphery ofY face plate
I8', an annular groove IIS to accommodate the
With particular reference to features of dis
pressure ends of 'clamp pieces 6I’ of which there
tinction between the present construction and
may be any desired number, four being shown in
that disclosed in my aforesaid copending appli
Fig.
15 equally spaced on the circle. These
cation, it has been shown that in the latter con 75
9
2,406,043
clamp pieces are rockable on a fulcrum lip ||«6
at their opposite or outer ends and each has
threaded engagement with a draw bolt I I 'I and is
contained within a recess I I8 milled into the ring
like rim portion of the Inodiñed measuring wheel
32' or 32". In Fig. 14 the measuring wheel is
10
be the rotary position of the latter. Axial com-A
pactness is increased by the modiñcations shown
in Figs. 14 to 18 permitting the iixture to be
made somewhat narrower from front toback than
is the case in Figs. l to 13. Particularly for test
ing or measuring light work, my improved lix
shown as confined to a ring~like structure or
ture
is thus made lighter in construction by the
arcuate measuring member 32’ which encom
reduction in quantity and size of its component
passes the face plate I8’ and is supported solely
parts.
thereon while rotatably adjustable as well as 10
In all forms of the construction, a bearing
fastenable by clamps 6I' in relation thereto. Fig.
bushing |22 may be permanently lodged in a coun
14 shows lfurther that measuring wheel 32’ has
terbore in the front end of the shaft `L18 or dil’
an inwardly disposed iienge I |51 against which the
and the internal diameter of this bushing will
rear surface of plate I8’ can be pressed by the
clamp pieces 5|' for setting up a frictional con 15 preferably be a snug sliding lit for a removable
sine plug of exactly the same outside diameter
tact su?cient to fasten the face plate I8 and
as sine plugs 'I8 so that such removable sine plug,
measuring wheel 32 together so that neither can
as indicated by broken lines at |23 in Figs. 7 and
be turned relative to the other. A thrust washer
14, can be shoved into this' center bushing |22
64’ is placed under the head of each draw bolt
||'|. The heads of some two diametrically op 204 exactly concentric with the axis about which the
sine plugs I8 revolve. Such a center sine plug
posite such draw bolts are always accessible to
will be found useful where it is desired to accu
be turned for tightening and loosening clamps
rately center a circular or symmetrical work piece
6|’ at the rear of the measuring wheel 32’.
on the face plate IS’. Also when needed it can
Preferably, diametrically opposite clamps will be
be
contacted by the sensing linger S3 of a height
so tightened or loosened to avoid olf-center strain 25
gauge or the like to help in the accurate deter
and distortion of the structure at any point.
mination of angles.
This modified form of measuring wheel 32’ as
As a substitute in function and purpose for
shown in Fig. 16 :may carry a graduated scale
clamp
means di or KSI’, the peripheral ring
band 33 bearing angle measuring indicia similar
like rim of measuring wheel 32 or 32’ may be pro
to 3| and 33 in Fig. 6. Also, in the same manner 30
vided with one or more radially directed threaded
as in Figs. 1 to 13, measuring wheel 32’ carries
‘holes
(not shown) with which a preferably flush
hollow sine plugs 'I8 in niches 'I1 internally en
headed set screw (not shown) may have threaded
gageable at their hollow rear ends by the lock
engagement to be turnable by a screw driver or
‘plug 28 for purposes that have heretofore fully
wrench from »the outside and whose inner end,
been explained.
35 which may be flat, cupped or pointed, will releas
A collar |20 iills the axial space between face
ably bind against the outermost periphery of
plate I8’ and the support I2' and thereby takes
work
holding plate I8 or I3’ thereby to lock this
the thrust of the spring washer 53 shown in Figs.
measuring wheel and plate against relative rotary
7 and 9. As differing -from the construction
shown in Figs. 1 to L3, on shaft 48' right hand 40 movement when the set screw is turned Iin and
releases them for such> relative movement when
threaded section `55’ and the adjoining left hand
retracted.
_,
threaded section 51’ are provided at a point near
er to the upright support wall I2’ as is permitted
In still further modification of the construc
tion shown, the measuring wheel 32’ need not
by entire elimination of the clutch plate 39 of
Figs. 1 to 18. This permits the modified clutch 45 be circularly complete but may comprise a mere
segmental portion or sector of a complete cir
drum 58’ to be simpliiied into the form shown
cular wheel.
in Fig. 14 and it is locked iixedly in place on
It will be understood that the language of the
shaft 48’ yby the retaining nut 60' in the same
appended claims comprehends and is intended to
manner as in Fig. 7, it being understood that the
dovetail-shaped periphery of this modiiied clutch 50 cover all fair substitutes and equivalents for the
particular mechanical parts and arrangements
drum 58 is grabbed and released by the clutch
which are herein disclosed merely to illustrate the
shoe 68’ in the same manner as in Figs. 1 to 13.
underlying novel principles of the invention.
The purpose and action of micrometer adjusting
I claim:
screw 84 and of the permanent position locking
1. A measuring and layout device or the like
clamp 9'? remain the same as in Figs. 1 to 13. 55
for temporarily holding a work object lirmly in
In a still further modified form of construction
selective and shiftable exact angular positions,
shown in Fig. 18 the spacer collar` |2íì .is joined
embodying in combination, a support base car
to the ring-like rim of further modified measur
rying a stationary index indicium, a rotatable
ing Wheel 32” by means of a circularly contin
uous disc-like web |2| so that collar |26 becomes 60 face plate equipped with means to fasten a work
object ñXedly thereto in arbitrarily inclined po
in eHect the hub |2il’ of this modified form of
sition, a wheel associated with said face plate in
measuring Wheel. In this form of the construc
a manner to rotate relatively thereto and carry
tion, shaft 48’ serves as a supporting journal for
ing a series of angle measuring indicia adapted
the measuring wheel 32" which, when clamps 6| ’
are loose, is free for rotary movement relative to 65 to register with said index indicium, bearing
means on said support base rotatably supporting
shaft 48’.
said plate, and cooperative means united respec~
In the operation of the modified construction
tively with said face plate and support base ex
of fixture shown in Figs. 14 to 18, there is no dif
cluding said wheel constructed and arranged re
ference in function from the uses to which the con
struction shown in Figs. 1 to 13 is put other than 70 leasably to fasten said plate directly to said sup
port base while said wheel remains free for ro
that the setting up and loosening of clamp bolts
tary movement relative to said plate and base'.
II'I takes the place of setting up and loosening
2. A measuring and layout device or the like
clamp nuts 65. Two of these clamp bolts are al
for temporarily holding a work object firmly in
ways accessi-ble at diametrically opposite points
on the measuring Wheel 32' or 32” whatever may 75 selective and shiftable exact angular positions,
embodying in combination, a support base, a ro
2,406,043
11
tatable face plate equipped with means to fasten
a work object ñxedly thereto in arbitrarily in
clined position, an angle measuring wheel rotat
ably associated with said face plate, bearing
means on said support base rotatably supporting
said plate. cooperative fastening means united
respectively with said face plate and said support
base excluding said measuring wheel constructed
and arranged releasably to fasten said plate di
rectly to said support base while said measuring
wheel remains free for rotary movement relative
to said plate and base, and separate cooperative
6. A work piece measuring and testing ñxture
embodying in combination, a base structure pre
senting an upright wall, a measuring wheel car
rying angle measuring elements and having a
hollow hub journaled in said wall in a manner
to be adjustably rotatable about a fixed axis
relative thereto, a face plate with instrumentali
ties carried thereby to fasten a work piece in ar
bitrary positions thereon and having a trunnion
shaft journaled in said hollow hub of the meas
uring wheel so that said plate is adjustably ro
tatable about said axis relative to said measur- '
ing wheel and Wall, universal fastening means
constructed and arranged releasably to restrain
said face plate and its trunnion shaft from ro
tening means operative releasably to fasten said
tary movement in an unlimited number of rotary
plate directly and ñxedly to said measuring wheel.
positions relative to said wall while freely per
3. A measuring and layout device or the like
mitting
rotary movement of said measuring wheel
for temporarily holding a work object firmly in
relative
to said face plate, and additional fasten
selective and shiftable exact angular positions,
ing means constructed and arranged releasably
embodying in combination, a support base carry 20' to restrain said measuring wheel from rotary
ing a stationary index indicium, a rotatable face
movement relative to said face plate while per
plate equipped with means to fasten a work object
mitting rotary movement of said face plate rela
means on said face plate and said measuring
wheel excluding said support base and said fas
ñxedly thereto in arbitrarily inclined position,
a wheel rotatably associated with said face plate,
bearing means rotatably supporting said wheel
tive`to said wall, whereby said work -piece and
face plate may be swung in unison with said
measuring wheel relative to said wall to selec
and face plate constructed and arranged to con
tive extents measurable by the degree of rotary
ñne both said plate and wheel to rotary move
movement of said measuring wheel relative to
ment relatively to each other as well as in unison
said wall.
about a common axis ñxed in relation to said
'7. A work piece measuring and testing iixture
support base, and cooperative means united re 30
embodying in combination, a base structure pre
spectively with said face plate and support base'
excluding said wheel constructed and arranged
releasably to fasten said plate directly to said
support base in ñxed absolute rotary position
relative thereto while said wheel remains free to
be rotated relatively to both said plate and base.
senting an upright wall, an angle measuring wheel
supported for rotary movement about a given axis
relative to said wall, a face plate having instru
i mentalities to fasten a work piece in arbitrary
positions thereon and supported in a manner to
be >adjustably rotatable about said axis relative
to said wheel and relative to said wall, universal
fastening means constructed and arranged releas
selective and shiftable exact angular positions,
ably to stay said face plate against rotary move
embodying in combination, a support base, a ro 40
ment in an unlimited number of positions relative
tatable face plate equipped with means to fasten
to said wall while permitting rotary movement of
a work object ñxedly thereto in arbitrarily in
said measuring wheel relative to 'said face plate
clined position, an angle measuring wheel rotat
so that the measuring wheel may be swung to any
ably associated with said face plate, bearing
desired orìenting position independently of said
means rotatably supporting said measuring wheel
face
plate after the latter is stayed by said uni
and face plate constructed and arrangedto con
versal fastening means, and additional fasteninsr
ñne both said plate and wheel to rotary move
means constructed and arranged releasably to re
4. A measuring and layout device or the like
for temporarily holding a work object firmly in
ment relatively to each other as well as in unison
about a common axis fixed in relation to said
strain said face plate from rotary movement rel
support base, and cooperative fastening means 60 ative to said measuring wheel while permitting
rotary movements of said plate and wheel in uni
united respectively with said face plate and sup
son relative to said wall so that the work piece
port base> excluding said measuring wheel con
may be swung in unison with said measuring
structed and arranged releasably to fasten said
wheel relative to said wall to selective extents
plate directly to said support base in fixed abso
measurable by the degree of rotary movement of
lute rotary position relative thereto while said 55 said
measuring wheel away from its said orient
measuring wheel remains free to be rotated rela
ing position.
»
tive to both said plate and base, and separate
8. In a work tilting and holding fixture, a sup
cooperative means on said face plate and meas
port base, a rotatable work carrying 'structure
uring wheel excluding said support base and said
rotatably
mounted on said base including a clutch
fastening means operative releasably to fasten 60
drum, a drum clutching shoe impellingly engage
said plate directly and flxedly to said measuring
able with a peripheral portion of said drum, an
wheel.
adjustor screw mounted on said base in a manner
5. A work'holding fixture including in combi
both to be rotated upon its own axis and also to
nation, a support structure containing a vertical
wall bored to afford a stationary bearing hole 65 be tilted bodily relative to said base and having
threaded engagement with said shoe in a manner
having a horizontal axis, and a compound work
to cause the latter to impel said drum through a
holding and angle measuring structure including
limited arc of rotative adjustment.
a measuring wheel having a hollow cylindrical
9. In an angle measuring and layout fixture,
trunnîonjournaled in said bore to support said
the combination with a support wall containing a
wheel for turning movement relative to said wall
about said axis, and a work holding plate dank
ing said measuring wheel having a trunnion con
round orientation hole, cfa work carrying struc
ture mounted for rotary movement about an axis
normal to said wall in a manner to traverse a face
centrically journaled within said hollow trunnion
of the wall inthe neighborhood of said hole, at
of the measuring wheel and likewise confined to 75 least .one bushing embedded in said structure
turning about said axis.
.
13
2,406,043
having one end opening through said structure
14
a portion axially aligned with said bore, a bear
ing in said handle portion in which also said
trunnion is journaled, a graduated angle meas
uring wheel in iront of said wall rotatively asso~
toward said wall, an elongated 'plug having a
cylindrical shank of diameter to enter and slidn
ingly iit within said orientation hole and within
the open end of said bushing, 'said plug having a Qu
elated with 'said Iwork holding plate, a hollow
shank section. of reduced diameter, and a split
trunnion on said measuring wheel sleeved about
bushing surrounding said` shank section of the
said plate trunnion within said bore and extendplug removably but tightly lodged in said orienta
ing to the rear of said wall, a clutch drum fixed
tion hole and shaped to restrain said plug from
on said plate trunnion at the rear of said wall, a
being removed from said orientation hole.
clutch plate ñxed on said wheel trunnion between
l0. A work holding iîizture, including in com”
said clutch drum and said Wall, and means re
bination, a fixture base having an upright sup
leasably to fasten said clutch drum and lsaid
port wall carrying an index mark, a bearing sup~
ported by said wall. a rotatable plate having a
vertical front face adapted to hold work ?ixedly
thereon. a trunnion-like structure ñxed on and
projecting rearward from Isaid plate journaled in
said bearing to permit turning of said plate about
a horizontal axis. an arcuate measuring member
bordering on said plate at the front of said sup- z
port wall swingable about said axis and carry
ing circumferentially spaced angle-denoting in
dicia, means to fasten said plate against rotary
clutch plate together in universal rotary positions.
16. A work holding fixture as defined in claim
1G, in which the said upright supp-ort wall occu
pies a su?ñciently small overall area to leave an
outer margin of the said arcuate measuring
member exposed and clear of the outer’boundary
of said support wall, together with fastening
means carried by the said exposed outer margin
of said arcuate measuring member in a manner
to be accessible for .manipulation at the rear
thereof, said fastening means being cooperative
movement relative to said wall, and means to
ly related to said member and plate in a manner
fasten said measuring member and plate against 25 selectively to fasten them together against rotary
rotary movement relative to each other.
movement relative to each other.
11A. A measuring and layout device as defined in
17. A work holding ñxture as deñned in claim
claim 5, together with a clutch member carried by
10, in which the said arcuate measuring member
the said plate trunnion at the rear of said support
comprises a portion of a circularly complete ring
wall, and means engaging said clutch member 30 like structure of larger overall area than the said
carried by said wall and constructed and are
upright support wall thereby to expose an annular
ranged to be manipulated for arresting or releas
margin
of said structure toward the rear and
ing said plate at will.
clear of said support wall, together with fasten
12. A measuring and layout device as delined
ing means carried by said margin of said ring
in claim 5, together with a clutch member carried 35 like structure on diametrically opposite sides of
by the said plate trunnion at the rear of 'said
the said axis and accessible from the rear for
support wall. clamp means stationed on said wall
manipulation thereat to make said ring-like
engaging said clutch member and constructed
structure fast to the said face plate.
and arranged to be manipulated for arresting or
18. A work holding fixture as defined in claim
releasing said clutch member at will, and addi 40 l0, in which the said arcuate measuring member
tional clamp means carried by said Wall in ar~
comprises a portion of a circularly complete
cutely shiftable relation to the latter constructed`
wheel rotatably sleeved on the said trunnionn
and arranged to engage and cling to said clutch
like structure of the said rotatable plate between
member in a manner to shift the latter rotatively
the latter and the said support wall, together
when itseli` shifted
relation to said wall.
45 with fastening means carried by said wheel in a
13. In a work holding fixture, the combination
manner to be accessible for manipulation and
with a rotatable work holding structure of, an
cooperatively related to said member and plate in
angle base containing an upright wall having a
a manner releasably to fasten them together
horizontal bore aiîo‘rding rotary bearing support
against relative rotary movement.
for said structure, a stiff bail-like handle rigid 50
19. A work holding fixture including in com
with said angle base spanning the angle embraced
bination, a support structure containing a verti
by said base and having a portion axially aligned
cal wall bored to añord la stationary bearing hole
with said bore. and a bearing in said handle pori
having a horizontal axis, and a compound work
tion in which also said rotatable work holding
holding and angle measuring structure including
structure is journaled.
55 a measuring wheel having a cylindrical hollow
14. In a work holding fixture, the combination
trunnion journaled in said bore to turn about said
with a rotatable work holding structure including
axis, and a work holding plate flanking said
a projecting trunnion of, an angle base contain
measuring wheel at the same side of said Wall as
ing an upright Wall having a horizontal bore in
said measuring wheel having a, trunnion concen
which said trunnion i's journaled, a stili bail-like 60 trically journaled within said hollow trunnion of
handle rigid with said angle base bridging the
the measuring wheel and thereby conñned to
angle embraced by said base and having a por
turning about said axis.
tion axially aligned with said bore, a bearing in
20. A measuring and layout device or the like
said handle portion in which also said trunnion is
for temporarily and firmly holding a work ob
journaled, a clutch drum ñxed on said trunnion 65 ject in variable positions, embodying in combina
between said Iwall and said handle portion, and
tion, a, support base having a planar bottom on
means carried by said angle base to clutch and
which said device may stably rest, a rotatable
stay said drum against rotation.
face plate structure eq ipped to receive and fixed
15. In a work holding ñxture, the combination
ly hold a work object in arbitrary positions there
with a rotatable work holding plate having a pro 70 on, a measuring wheel rotatably supported by
jecting trunnion of, an angle base containing an
said face plate structure, bearing means rotat
upright wall at the rear of said plate having a
ably supporting said plate structure and measur
bore in which said trunnion is journaled, a stiff
ing
Wheel constructed and arranged to confine
bail-like handle rigid with said angle base span
ning the angle embraced by said base and having 75 the same to rotary movement both relatively and
in unison about a common axis angularly dis
f
_
2,406,043
15»
placed from perpendicular relation to said bottom
of said base, and cooperative means united re
spectively with said measuring Wheel and plate
structure constructed and arranged releasably to
fasten said measuring Wheel in ñxed rotative re
16
`ed respectively with said plate and measuring
wheel constructed and arranged releasably to
stay said plate against rotary movement in se
lective rotary positions relative to said base struc
ture While permitting rotary movement of said
measuring wheel relative to said plate so that
lation to said plate structure.
the measuring wheel may be swung to any de-21. A measuring and layout device as defined
sired orienting position independently of said
in claim 20, in which the said measuring Wheel
plate after the latter is stayed by said universal
and the said support base are provided respec
fastening means, and additional cooperative fas
tively with cooperative graduation marks and an l() tening means united respectively with said plate
index mark for measuring relative angular dis
and base structure constructed and arranged re
placement therebetween, together Witl‘i sine plugs
leasably to restrain said plate from rotary move~
projecting in ñxed relation to said carrier.
ment relativeV to said measuring wheel while per
22. A work piece measuring and testing fixture
mitting rotary movements of said plate and Wheel
embodying in combination, a base structure, an 15 in unison relative to said base structure so that
angle measuring wheel supported for rotary
tbe work piece may be swung in unison with
movement about a given axis relative to said
said measuring wheel relative to said base struc
structure, a Work supporting plate having in
ture to selective extents measurable by the de
strumentalities for fastening a Work piece in ar»
gree of rotary movement of said measuring wheel
bitrary positions thereon and supported in a 20 away from its said orienting position.
manner to be adjustably rotatable about said
axis relative to said wheel and relative to said
OTTO E. SORENSEN.
base structure, cooperative fastening means unit
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