US2261777A

US2261777A - Universal gauge

Info

Publication number: US2261777A
Application number: US301005A
Authority: US
Inventors: Poppe Alfred
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-10-24
Filing date: 1939-10-24
Publication date: 1941-11-04
Anticipated expiration: 1958-11-04

Description

Nov. 4,7'1941. A, POPPE UNIVERSAL l GAUGE Filed Oct. 24, 1959 FIG. 1

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TTORNEY.

Patented Nov. 4, 1941 UNITED STATESA PATENT OFFICE 2,261,777 UNIVERSAL' GAUGE v Alfred Poppe, Rochester, N. Y. Application october 24, 1939, seria1N0.301,005

i (o1. azi-'174) 7 claims.

The object of this invention is to provide a universal gauge for calipering the length of certain portions of screw machine parts which have tw or more diameters.

This and other objects of the invention will be illustrated in the drawing, described in the specication, and pointed out in the claims at the end thereof.

In the drawing:

Figure 1 is a top plan view of the gauge.

Figure 2 is an end elevation of the gauge looking at it from the right in Figure l.

Figure 3 is a view of the gauge laid on its side.

Figure 4 is a sectional view, the section being taken on the line IIx-4:1: of Figure 1.

Figure 5 is a section on the line 5.7:--5zc of Fig- I ure 1.

Figure 6 is a section on the line Brr-6a: of Figure 1.

Figures 7, 8 and 9 are detail views of spacing collars.

Figure 10 is a detail view of the guide plate.

In the drawing like reference numerals indicate like parts.

In the drawing reference numerals I and 2 represent the two jaws of the gauge; the jaw I is movable and the jaw 2 is stationary. Riveted to the jaw2 is the guide plate 3. The jaw 2 is preferably formed of two plates marked 2a and 2b. These jaws are riveted together by the rivets 4, 4 which pass through the guide plate 3 andihold the guide plate firmly on the jaw. The jaw I is also formed of two plates marked Ia and Ib in Figure 5, and these plates are cut away to form a slot 5 through which the guide plate 3 extends so that the jaw I can slide thereon. 'I'he guide plate is cut away as indicated at 6 with a wide, rectangular opening to receive the head 1 of the screw 8, and it is also cut away with a narrower rectangular opening indicated at 9 to receive the threaded part of the screw. The screw ts in this opening so that it can turn freely but can not move endwise. end thereof that engages with a pivot 3a formed on the guide plate. The two parts Ia and Ib of the jaw I are fastened together by rivets and are threaded to receive the screw 8. The screw is placed in the guide plate, and the guide plate is inserted in the slot 5, and the screw is turned into threaded engagement with the jaw I. When the jaw I, the guide plate 3, and the screws 'I and 8 are assembled in this way, it is ready for assembly with the stationary jaw 2 and the stud I0. The stud I shown in Figure 4 has a reduced end Il which is riveted in an opening provided in the The head 1 has a recess inthe guide plate, 3. 'Ihe two parts of the stationary jaw 2 are fastened together at the ends by rivets, and the end of the guide plate is inserted in the rectangular slot shown in Figure 6 and the rivets 4, 4 are passed through the two parts of thev jaw and the guide plate and riveted in place. With this assembly the two parts of the jaw can be brought together, or drawn apart, by turning the head I of the screw. e

The part Ia of the moving jaw I is cut away as indicated at I Ia to form a recess that receives the end of the stud I0, when the jaw I is brought against the jaw 2.

A spacing sleeve I2 is provided which encircles the stud III. This sleeve has a reduced end I3. The reduced end I3 extends into the recess IIa of the moving jaw. This permits the moving jaw to close up to the stationary jaw.

On the stud I0 is placed a swinging plate I4 having an upturned end I5 forming a bracket thereon. This upturned end is adapted to rest against the two jaws when the paws are either open or closed or in intermediateposition. On the stud I0 is then placed the collar I6 and on top of this collar is then placed the swinging plate I'I, having an upturned end I8 which forms a bracket thereon and which is adapted to rest against the two jaws as shown in Figure 3. On the stud II) is then placed the spacing collar I9, and on this is then placed the base plate 20 hav-v ing legs 2l, 2I thereon by which the gauge may be supported on a table.

p Upturned from the right hand end of the base plate 20 is the bracket 22 which rests against the jaws when the jaws are either open or closed or in an intermediate position. The stud I0 passes through round holes in the swinging plates I4 and Il and passes through an elongated slot 23 in the base plate 20. This permits the :adjustment of the base plate 20 laterally with reference to the stud.-

- The studlll has a threaded end shown in Figure 4 on which the knurled nut 24 engages and `by which the parts are all clamped together. It will also be understood that the base plate 20 can extend parallel to the jaws I and 2 or can be placed at right angles thereto when the use of the gauge requires such a position.

As shown in Figure 1, the jaws of the gauge are cut away with holes indicated at 30, 3|, 32, 33 and 34. yThe jaws can be brought together in direct abutment with each other and in such case the width of the opening 34 will be alf. The width of the second opening will be 11g, the width of the third opening will be 1/8", the width of the fourth opening will be 1A, and the width of the fifth or largest opening will be 1/2".

The jaws can be moved apart by turning the head 1. They can be moved to position so that the width across the rst opening between the jaws will be g", in which case the recesses in the jaws will form parts of a mutilated curve having a diameter of 1 2. The jaws can then be moved further apart, so that the width across the second opening will be 1/8", in which case the recesses in the jaws will form parts of a mutilated circle having a diameter of lAg". The jaws can then be moved further apart so that the recesses of the third opening will form parts of a mutilated circle having a diameter of 1A". The jaws can then be moved further apart, so that the width across the fourth opening in thejaws will form parts of a mutilated circle having a diam` eter of a half an inch. The jaws can then be moved still further apart until the recesses of the fifth opening will form parts of a mutilated circle having a diameter of one inch. These various positions of the jaws are marked on the guide plate 3.

It will also be understood that the jaws may be stopped in any intermediate position, the purpose of the series of openings being to clamp between the jaws the round portion of .some screw machine part, the length of which round portion is to be measured.

It will also be understood that the jaws I and 2 when assembled will have a uniform thickness throughout the length and breadth thereof, which thickness will preferably be because that is a unit which is easily added or subtracted in making the measurements with the gauge.

It will also be understood that when the jaws I and 2 are assembled with the spacing screw I2 and swinging plate I4, the distance between the `top of the jaw and the bottom of the plate I4 is preferably .650", and when the jaws are assembled with the swinging plate I'I, the distance between the top of the jaws and the bottom of the swinging plate I'I is one inch, and when the jaws are assembled with the base plate the distance between the top of the jaws and the bottom of the base plate 2D will be 1.5.

It will also be understood that the swinging plates I4, I'I and 20 may be of any suitable thickness, and for this purpose we will assume that they are each of a thickness of .05 and therefore the distance between the top of the jaws and the top of the plate I4 will be .06, and the distance between the top of the jaws and the top of the plate II will be .95, and the distance between the top of the jaws and the top of the plate 2U will be 1.45.

In using the gauge the round portion of some screw machine part is inserted in the appropriate hole between the two jaws, and the jaws are then brought together around it, so that the head or the shoulder of the screw machine part rests directly on the jaw, assuming that the balance of the screw machine part does not extend below the jaws. A micrometer caliper is then applied with one jaw of the caliper under the jaws of the gauge, and the moving part of the micrometer caliper is then brought into contact with the upper end of the screw machine part, and the measurement of the span is taken. From this is deducted the thickness of the jaws, and the difference between the two elements will .give the length of that portion of the screw machine part above the jaws to which the micrometer caliper could not be applied directly.

If the screw machine part extends below the jaws, then one or the other of the plates I4, I1, or 20 must be used, depending upon the length of the part that extends below the jaws, as will now be explained.

If that portion of the screw machine part that extends from the top of the jaws down is less than .6 long, then the swinging plate I4 would be swung under the screw machine part, and the measurement would be made from the bottom of the plate I4 to the top of the screw machine part above the jaws, and from this measurement .65" would be deducted and the difference would be the correct length of the portion above the jaws.

If the length of thescrew machine part pro- ,jecting below the top of the jaws is less than .95 long, then the swinging plate II will be used.

If the length of the screw machine part projecting below the top of the jaws is not more than 1.45" long, then the swinging plate 20 will be used.

In each case the swinging plate will be placed directly under the screw machine part that is clamped between the jaws. "The micrometer caliper is then applied with its lower jaw under the plate selected, and thescrew of the micrometer is adjusted to the top of the screw machine part projecting above the jaws. This measurement is then read, and from this measurement .65 is deducted if the plate I4 is used, `one inch is deducted if the plate I'I is used, and 1.5 is deducted if plate 2U is used, and the difference `between these elements will-'be the length of the screw machine part projecting above the jaw.

The word clamp or clamped is used in the specification and claims advsedly, it being understood that the part to be measured must be held but must not be held so tight as to disturb its alignment for the purpose of making the measurement accurately, and in this sense the word is used in the specification and claims.

I claim: i

1. A gauge to be used in measuring the length of a certain portion of any screw machine product, which'comprises two jaws, means for moving the jaws toward and from each other, means for clamping the screw machine product between the jaws with the length of the portion to be measured' projecting above the top surface of the jaws, means for providing a xed bottom surface in the gauge placed at a distance below the top surface of the gauge greater than the length of the portion contained below the top of the jaws, the distance between the top of the gauge and the bottom fixed surface being a constant, the screw machine product being so held in the gauge that the distance between the top of the screw machine product projecting above the jaws and the xed bottom surface below the jaws can be accurately measured, which distance less the constant will give the lengthl of the portion above the jaws, to which partV the micrometer cannot be applied directly.

2. A gauge to be used in measuring the length of a certain portion of anyscrew machine product, which comprises two jaws movable toward and from each other with the length of the portionto be measured projecting above the top surface of the jaws, aguide plate fastened in one of the jaws on which the other jaw is adapted to move back and forth, a stud riveted in said guide plate, a plate mounted to swing on said 1 stud, said plate having a bottom surface which is held at a distance from the top of the jaws which is constant, said jaws being adapted to receive a screw machine product clamped between them with a portion thereof projecting above the jaws, the length of which portion is to be measured, said gauge permitting a measurement to be made of the distance between the bottom of the plate and the top of the screw machine product, which distance less the constant equals the length of that portion ofthe screw machine product to be measured.

3. A gauge to be used in measuring the length of a certain portion of any screw machine product, which comprises two jaws movable toward and from each other with the length of the portion to be measured projecting above the top surface of the jaws, a guide plate fastened in one of the jaws on which the other jaw is adapted to move back and forth, a stud riveted in said guide plate, a plate mounted to swing on said stud, said plate having a bottom surface which is held at a constant distance from the top of the jaws, said jaws being adapted to receive a screw machine product clamped between them with a portion thereof projecting above the jaws and a portion projecting below the jaws, the length of which portion projecting above the jaws is to be measured, said gauge permitting a measurement to be made of the distance between the bottom of the plate and the top of the screw machine product, which distance less the constant equals the length of that portion of the screw machine product above the jaws.

4. A gauge adapted to be used in measuring the length of a certain portion of a screw machine product, said gauge having a part having a dimension that is constant and having a recess in said part in which the length of a portion of a screw machine product not to be measured is clamped, means for clamping it therein, the other portion of the screw machine product projecting above the gauge, the gauge and screw machine product being so assembled that the length of the assembly can be measured by a micrometer, the length of the projecting portion of the screw machine product being the total length of the assembly less the length of the constant.

5. A gauge to be used in measuring the length of a certain portion of any screw machine product, which comprises two jaws movable toward and from each other, between which the product is held with the length of the portion to be measured projecting above the top surface of the jaws, a guide plate fastened in one of the jaws on which the other jaw is adapted to be moved back and forth, said guide plate being slotted, an adjusting screw mounted to rotate in said slot, said screw engaging with the movable jaw for the purpose of adjusting it to clamp the screw machine product in position for measurement.

6. A gauge adapted to be used in measuring the length of a certain portion of a screw machine produot, said gauge having parts formed with a recess therein in which the portion of the screw machine product the length of which is not to be measured is held, the length of that part of the gauge being a constant, the other portion of the screw machine product the length of which is to be measured projecting from said parts and forming an assembly therewith, the length of said assembly being capable of measurement by a micrometer, the length of the projecting portion of the screw machine product being the total length of the assembly less the length of the constant,

7. A gauge to be used in measuring the length of a certain portion of any screw machine product, said gauge comprising means for clamping the screw machine product in position with a portion projecting from said means, the length of which portion is to be measured, and means associated with said clamping means for-ming a measuring constant, said means including a measuring surface situated at a point remote from the projecting end of the product and a second positioning surface situated intermediate the ends of the product, the screw machine product being so held in the gauge that the distance between the top of the screw machine product projecting above the clamping means and the measuring surface remote therefrom can be accurately measured by a micrometer, which distance less the constant will give the length of the portion above the jaws, which portion cannot be measured separately with a micrometer.

ALFRED POPPE.