US2211634A

US2211634A - Centering jig

Info

Publication number: US2211634A
Application number: US251273A
Authority: US
Inventors: Roger W Baker
Original assignee: GEORGE F MARTIN JR
Current assignee: GEORGE F MARTIN JR
Priority date: 1939-01-16
Filing date: 1939-01-16
Publication date: 1940-08-13
Anticipated expiration: 1957-08-13

Description

R. W. BAKER GENTERING JIG Aug. 13, 1940.

Filed Jan. 18, 1989 Roger War UNITED s'rA'rss P'ENT FFICE CENTERING JIG Roger W. Baker, Mishawaka, Ind., assignor to George F. Martin, Jr., Elkhart, Ind.

Application January 16,

4 Claims.

This invention relates to gages or jigs; and more particularly to a centering jig for use With a drill or other tool.

An object of this invention is to provide an improvedV jig for use with a tool such as a drill or the like which is so constructed that it can be readily engaged with either a round, square or' rectangular article so as to securely hold a drill or other tool relative to the article.

Another' object of this invention is to provide va jig of this kind which is capable of ready adjustment so that the jig can be easily and quickly adjusted to engage articles of various sizes and types.

A further object of this invention is to provide a jig of this kind which is provided with a bushingstructure in the center thereof, the bushing structure being pr'essed or otherwise firmly mounted within a supporting block so that where it is desired to use different sizes of tools or drills, which are adapted to pass through the bushing, the block may be engaged with the remaining structure which embodies a different size bushing.

A still further object of this invention is to provide a jig of this kind which may be used to center a tool relative to an article to be worked upon, the jig being so constructed that it may engage either the interior or' exterior of the article which is being worked upon.

To the foregoing objects and to others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be mor'e specifically referred to and illustrated in the accompanying r drawing, wherein is shown an embodiment of this invention, but it is to be understood that changes, modifications and variations may be resorted to which fall within the scope of the invention as claimed.

In the drawing:

Figur'e 1 is a perspective view of a jig constructed according to an embodiment of this invention,

Figure 2 is a sectional view taken on the line 2-2 of Figure 1,

Figure 3 is a fragmentary sectional View taken on the line 3-3 of Figure 1, and

Figure 4 is a fragmentary sectional view taken on the line 4-4 of Figure 1.

Referring to the drawing, the numeral III designates generally a supporting block which in the present instance, is constructed of metal and is provided With a pair of openings I I therethrough. ,The openings II are in parallel relation to each 1989, serial No. 251,273 (ci. 77-62) which one end of the rod I2 is adapted to enz gage. The rod |2 in the' present instance is adapted to be pressed or otherwise firmly mounted in the opening I5 of the lug Id and is adapted to extend downwardly at right angles to the length of the rod I2. Each rod I2 is adjustably 1 secured in the block III by means of a set screw IG which engages in a thr'eaded opening I'I provided in the block Ill. The set screw IB is of the type wherein a countersunk socket is provided in the outer end thereof in which a key or plug wrench is adapted to engage.

The block IO is also provided with a second pair of openings I8 which extend in parallel relation to each other through the block IO and at right angles to the openings. I I. The openings I are positioned above the openings I I and an elongated' rod |9 similar to the rod |2 is ad'apted to engage in an opening I8. The rods I9 are substantially of the same length as the rods I2 and on the under side thereof each rod IB is provided with a flat longitudinally extending face 20. The block IO is provided with a threaded opening 2| for each rod I9 in which a set screw 22 is threaded and engages the fiattened surface ZI] of the' rod IB so as to adjustably hold a rod I9 relative to the: block IO, The set screws 22 are similar to the set screws IB, being provided with a countersunk socket in which a suitable plug wrench is adapted to engage. The rods I9 at one end thereof are provided with a lug 23 having. an opening 24 in which the rod I9 engages. The rod I9 may be pressed or otherwise firmly positioned in the opening 24 so that the lugs 23 Will be disposed in a Vertical position when the block IO is in a horizontal position. The set screws IIi and 22 are adapted to, at all times, hold the rods I2 and I9 with the lugs I4 and 23 thereof at right angles to the upper face of the block IO.

The block IO in' substantially the center thereof is provided with an opening 25 therethrough in which a pair of bushing members 26 are adapted to engage. The bushing members 26 are pressed or otherwise firmly mounted in the block II! and in the present instance, there are two of these bushings 26 which are pressed into the block l from the opposite faces thereof. The bushings 26 are provided with a bore 21 therethrough in which a tool such as a drill or punch is adapted to engage so as to hold the drill or tool in an operative position.

In the use of this jig the rods IZ and IS are adjusted relative to the block ID and to each other so that the axis of the bore 27 will be positioned properly relative to the article which is being worked upon. The lugs Ill and 23 may engage the exterior surface at one end of a cylinder or other round object or if desired, these lugs I 4 and 23 may engage Within the interor of a cylinder. It will also be understood that these lugs Ifi and 23 may engage adjacent sides of a square or rectangle so as to position the axis of the bore 21 of the bushings 26 in the desired location relative to the article which is being worked upon. The adjustment of the rods I2 and lg is effected by adjustment of the set screws IG and 22 so that these rods 12 and l9 may have the lugs M and 23 respectively projecting beyond the block IG for an equal distance or if desired, the rods l2 may project beyond the block l for a distance different from the rods 49, this adjustment being dependent on the location of the hole which is to be drilled in the article to be worked upon. This jig is of an exceedingly simple construction so that it can be manufactured at a relatively small cost and due to the ready adjustment of the several parts thereof the jig can be used for various articles and When once adjusted will accurately position the axes of the bushings 26 in the proper relation to the article which is being worked upon. While I have shown the bushings 26 as being firmly mounted in the block l, if desired, these bushings may be releasably mounted therein by well known means.

What I claim is:

l. A jig as set forth comprising a block member provided with pairs of right angularly related openings therethrough disposed parallel With opposite faces of the block, rods disposed in said openings and projecting beyond the adjacent edges of the block, threaded means clamping said rods in said openings, and right angularly disposed article engaging members carried by an end of each rod.

2. A jig as set forth comprising a block memher provided with right angularly related openings therethrough disposed parallel with opposite faces of the block, rods disposed in said openings and projecting beyond the adjacent edges of the block, each of said rods having a flat longitudinally extending surface, a right angularly disposed article engaging member carried by one end of each rod, and clamping means carried by the block engaging the fiat surfaces of the rods to adjustably secure said rods in said openings while simultaneously holding said article engaging members at right angles to the opposite faces of the block.

3. A jig as set forth comprising a block member provided with right angularly related openings therethrough disposed parallel with oppositc faces of the block, rods disposed in said openngs and projecting beyond the adjacent edges of the block, each of said rods having a fiat longitudinally extending surface, a right angularly disposed article engaging member carried by one end of each rod, threaded clamping means carried by the block engaging the fiat surfaces of the rods to adjustably secure said rods in said openings while simultaneously holding said article engaging members at right angles to the opposite faces of the block, said block having a centrally disposed opening transversely therethrough, and a bushing member engaging in said central openmg.

4. A jig as set forth comprising a block, a pair of parallel rods slidable through said block, a

right angularly disposed member fixed to each rcd at one end thereof, a second pair of parallel rods slidable through said block and disposed at' right angles to said first pair of rods, a right angularly disposed member fixed to one end of each of said second pair of rods, clamping means carried by said block and engaging said rods for adjustably securing said rods relative to said block, and a tool guiding bushing carried by said block.

ROGER W. BAKER.