US1298197A - Plug-gage. - Google Patents

Description

E. GAIRNG.

PLUG GAGE. AP'PLICATION FILED MAYSI i918.

1,298,197. Patented Mar. 25,1919.

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UNITED sTATEs raTENT oEEioE.

EMIL'GAIRING, 0F DETROIT, MICHIGAN, ASSIGNOR TO THE GAIRING-NEEDHAJVI TOOL V CO.,INC., 'A CORPORATION 0F MICHIGAN.

PLUG-GAGE.

Application filed May 31, 1918.

To all whom t may concern:

Be it known that I, EMIL GAIRING, citizen of the United States, residing at Detroit, county of Vayne, State of Michigan, have invented a certain new and useful Improvement in Plug-Gages, and declare the following to bea full, clear, and exact description of the same, suehas will enable others skilled in the art to which it -pertains to make and use the same, reference being had to the accompanying drawings, which form a part -of this specification.

This invention relates to plug gages, shown in the accompanying drawings and more particularly pointed out in the following specification and claims.

It is well known among those who employ plug gages to determine the accuracy of their work that the gages rapidly become worn through use making it frequently necessary to discard the gages that they may be replaced by others. This item in some machine shops involves a considerable outlay and it is therefore one of the objects of this invention to reduce the cost by providing plugs of varying diameters, with a suitable holder which is adapted to receive any of the dierent gages or plugs, the construction of the holder being such that one plug may be readily removed to be replaced byanother plug of the required size.

.It will be seen that a great variety of sizes of plugs may thus be carried, each of which may be mounted inthe vholder when required for use and when worn may be replaced by another ,of the lproper gage at a nominal cost.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of partsand in the details of construction hereinafter described and claimed, it being understood that changes may be made in the precise embodiment of the invention herein disclosed without departing from the spirit of the same.

In the drawings accompanying this specication.

Figure 1 is a side elevation of the device with a plug in position.

Fig. 2 is a longitudinal central sectional view through the holder with the plug 1u position.

Fig. 3 is an elevation with parts 1n sec- Specification of Letters Patent.

Patented Ma1'.125,11919.

Serial No. 237,616.

tion, showing an annular plug of relatively large diameter mounted upon the outer peripheral tapering end of the holder.

Fig. 4 is a detail cross sectionalview of an annularplug.

Fig. 5 is a detail view in elevation ofa plug adapted `to enter the-tapering socket of the holder.

Referring now to the letters of reference placed upon the drawings.

A, denotes a plug holder lprovided with a knurledlhandle to facilitatethe manual holding of the device. The holderisprovided with a tapering socket '-A, at one end adapted to receive the tapering shank B, of a Vplug gage B. The outer peripheral wall near the end of the holder is also of tapering forni tovreceive an annular plug gage C, held in place by a nutlD, threaded upon the end of the holder. While in some cases it may not be necessary to employ the nut to secure the vannular plug to -the holder this is considered the preferable construction for the reason that the annular plug gage,-being of relatively large dia.1net.er,-is more apt to stick when withdrawing the gage from the hole in which it is inserted than the smaller sizes of plugs and thereby become separated from the holder.

Extending centrally through the holder is a bore A2, opening into the tapering socket at 011e end. This bore is relatively larger at the opposite end of the holder for a portion of its length andv thereby forms a shoulder A3. 'E, indicates a plunger roel fitted in the boreAZ, one end offwhich is adapted to bear against Vthe shank end of the gage plug B. E, is an enlargedhead formedY on the opposite end ofv the plunger rod fitted tothe enlarged portion ofthe bore 1n the holder and extending beyond the end of the latter-for a short distance when in its normal position. F, denotes a spring coiled around the plunger rod, one end of which bears against the enlarged head of the rod and the other against the shoulder A3, of the holder. E2, indicates a transverse pin screwed into the plunger rod and projecting laterally into a radial hole A, formed in the holder to receive it. A5, is a longitudinal groove extending from the hole A4, into the tapering socket A', to receive the pin E2, when the plunger is actuated to drive out the plug gage.

Having indicated the several parts by reference letters the construction and operation of the device Will be understood.

Plugs of varying gage formed with a tapering shank are inserted in the tapering socket of the holder, and When it is desired to remove the plug for the purpose of inserting one of different gage it is only necessary to tap the projecting head of the plunger upon a table or like surface to drive the plug out of the socket of thel holder ,-the spring acting to force the head of the plunger beyond the end of the holder after each operation of the plunger.

Relatively large annular gage plugs are tted over the tapering end of the holder and are held in place by the nut engaging its threaded end.

f Then it is desired to remove or replace these gage plugs the nut is iirst removed and the projecting Wall ofthe plug tapped lightly to force it from the tapering endof the holder.

Having thus described the invention what I claim is 1. In a device of the characterrlescribed, a holder having at one end a tapering socket, a removable plug gage having a shank tted to the tapering socket of the holder, and manually actuated means adapted to act upon the plug gage, whereby the latter may be forcibly ejected from the holder.

2. In a device of the character described,

a holder having at one end a tapering socket and a bore communicating With the socket extending the length of the holder, arremovable gage plug having a shank fitted to the tapering'l socket of the holder, and a plunger lodged in the bore of the holder, adapted to be manually forced into the tapering socket to eject the gage plug Vfrom the holder.V

3. In a device of the character described, a holder having at one end a tapering socket and a bore communicating With the socketv extending the length of the holder, a removable gage plug having a tapering shankffitted to the socket of the holder, a

movable plunger lodged in the bore of the holder and adapted to act upon the shank Copies of this patent maybecbtained for of the gage plug to eje-ct the latter from the Y holder, and a spring to return the plunger to its initial position following the dis-V charge of the gage plug from the holder.

4. In a device of the character described,

a holder having a tapering end to receive an annular gage plug, also a tapering socket Y l Vto receive the shank of another'gage plug,

and a central longitudinal bore communicatmg with the socket to receive a movable plunger rod, a removable annular gageY plug fitted to the tapering end of theholder, a

'nut screwed Vto the holder tok securethe annular gage plug in position, a removable gage plug of relativelyy different diameter having a tapering shank fitted to the-tapering socket of the holder, a movableplunger Y throughout the length of the holder, an annicating with the. socket and extending,

nular gage plug fitted to the tapering end of Y the holder, a nut screwed to the holder to secure' the annular gage plug thereto, a gage Y plug of relatively different diameter having Y a shank fitted to the tapering socket of the holder, a movable plunger lodged `in the central bore of the holder and adapted to enter its tapering socket having an enlarged hea-d projecting beyond the end of the holder, a

Vspring coiled around the plunger and bearing at one end against the holder `and at'the .Y other end against ,theI enlarged end of,r the plunger, and a .transverse pin supported byv the plunger and extending into a radial opening lin Athe Wall of the holder to limit the return movement of the plunger.

In testimony whereof, I sign thisspecifii i i l cation in the presence of two Witnesses.

EMILGAIRING. Witnesses: p v

S. E. THOMAS,

J oiiN CoNsiDiNn, J r.

ve cents cach, by addressing1 the Commissioner of Patents, Washington, D. C.

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