Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS889273 A
Publication typeGrant
Publication dateJun 2, 1908
Filing dateOct 10, 1906
Priority dateOct 10, 1906
Publication numberUS 889273 A, US 889273A, US-A-889273, US889273 A, US889273A
InventorsAlbion W Thomas
Original AssigneeAlbion W Thomas
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 889273 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)






Specification of Letters Patent.A

Patented June 2,1908.

Application led October 10, 1906. Serial No. 388,199.

To all whom it 'may concern.'

`Be it known that I, ALBION W. THOMAS, a citizen of the United States, residing at Rome, in the county ofOneida and State of New York, have invented certainnew and useful Improvements in Boring-Jigs, of which they following is a speciiication, reference being had therein to the accompanying drawing.

My invention relates to an im lroved boring jig, and I declare that the fo lowing is a full, clear, concise and exact description thereof sufficient to enable one skilled in the .art to make and use the same, reference being had to the accompanying drawings in which like letters and numerals refer to like parts throughout.

The -purpose of the invention is to provide a means by which a mechanic can insure the boring of a hole at a right or oblique angle and can also insure that the holes bored fromI opposite sides will by reason of such angles being iixed, exactly meet, and the vvarious utilities or' the device will be apparent to any skilled mechanic. l

The device comprises a standard which supports a barrel by trunnions', the barrel be. ing adapted to receive gages of diilerent sizes according to the bit to be used. The

fbarrel and the gages are centrally bored so that the bit passes through the gage which is mounted in the barrel and establishes and 'maintains the direction of the hole to be.


In the drawings, Figure 1 is aperspective view; Fig. 2 is a partial side view;` Fig. 3 is-a vertical sectional view ofthe device, and Fig.

- '4 is a partial sectional view at right angles to Fig. 3, while Fig. 5 is aview of some gages to be supported in the barrel. Fig. 6 is a para tial cross-section view in detail ofthe nested gages.

Referring to the figures more in detail, 1

re resents a frame having a rinl like base 2 with vertical standards 3. On t ese standardsis mounted a barrel or sleeve 4 by trunnions 5 and bolts 6, one of which is a thumbscrew to turn the barrel on the standards 3.. This latter bolt 6 extends simply -through the standard 3 and into the trunnion, but the one on the side, though either may be adapted for the purpose, passes through the trunnion and the barrel a sufficient distance to engage the inside or smallest gage by friction of the bolt 6 to hold it in place, the other gages being likewise held by the bolt, as will be seen. The gages are indicated by 7 and comprise a series of cylinders, each smaller fitting into the next larger and the gages being of such size that the smallest in .this instance is a quarter of an inch, the gages increasing by eighths and the largest gage, which is the baritself, is an inch in diameter. The top of the barrel is cut out as indicated at 8, and each gage has an overlapping edge 9 so that they are su' orted in a nest on the top of the barrel. the gages, except the innermost one, have a longitudinal slot. 10 with side-cut 1 1 which is rovided for the passage of the bolt 6 theret rough to its rictional contact with the innermost gage, the intermediate gages being slip ed down over the bolt and turned so as to e held in position. When one ofthe slotted gages is to be used the bolt 6 is unscrewed so as to leave the bore of the gage clear.

On -one side ofthe device the trunnion has integral or mounted thereon a graduate dial 12 and the corresponding side piece of the frame has an upward extended arrow or needle 13. The purpose'of this device is to permit the mechanic to measure the angle and "maintain it in different pieces of work.- On

one side of the barrel is mounted or integrally cast a case 14 which is bored .at right angles to the bore of the barrel.` This case is bored out and a level inserted therein comprising a brass tube 15 with glass 16 therein, the tube having slightlyprojecting thumb-pieces .17 so that it-can be turned to protect the glass by the wall of the outer casing when the level is not in use. The end of the casing is screwthreaded a short distance-andthe outer wall of the tube is also screwthreaded so that thetube is held iii ythe casing thereby. I provide also means for'limiting the depth of the bore. This comprises two arms 18 slotted aty 19 and supported on the `barrel by thumb-screws 20 and supporting at their to the ring 21. The height of the ring is a )usted so that contact of the brace grip with the ring limits the depth of the bore made by the bit, the thumb-screws permitting adjust-` ment of the ring as desire Since the barrel may be tilted at such angle that its axial line would strike the base part 2, this latter art has a cut-out on one side as shown at 2a 1n Fig. 1.

In orderl to provide a stable mounting for the device I provide a rubber ring 24 constructed to lap over rin 2 and having on its underside nubs 25 where y the device is held on a surface without marringsthe surface or 1. In a device ofthe character described, a-

frame comprised of a base and vertical standards, a barrel trunnioned at the end of the standards, and` a tubular gage removably supported in the barrel With its axis coincident with the axis of the barrel.-

2. In a device of the character described, an annular base having oppositely disposed vertical standards, a barrel mounted on the standards by means of trunnions, one of the trunnions having a graduate dial and one of the standards having an index finger adjacent the dial, substantially as shown.-

3. In a device of the character described, a standard, a barrel, gages supported in the barrel and means supporting the barrel on the standard and the gages in the barrel, substantially as shown. I

4. In adevice ofthe character described, a

barrel axially bored for the passage of a borl ing tool therethrough, the barrel having mounted` therein a plurality of gages and means securing the gages in the barrel, the said gages being cut out for the entry of said securing means to abut against the Wall of the innermost gage, substantially as shown.

5. In a device of the character described, a sWingably mounted barrel, and `a nest of interitting guides, the outermost being supported on the barrel 'and each successive inner one supported on the next Outer one, the said guides being severally of a length adapted 'to control the direction of a boring tool passed therethrough, substantially as described.

6. In a device of the character described, a tool-guiding means comprising a frame with vertical standards, a guiding barrel trunnioned on the standards, in combination with a guard mounted on the barrel and adjustable lengthwise thereof to limit,the depth of the tool bore, substantially as described. 7. In a boring gage, a standard, a toolvguiding means swingably mounted thereon at a point substantially distant from the Work to be bored, extensible means adjustably mounted thereon to limit the boredepth of a tool and means for measuring the angle'of the bore, by the combination of Which means the direction and depth of a plurality of holes may be standardized.

8. In a device of the character described, a barrel and a plurality of tool-guides nested therein, each guide having an exterior annulus and an interior annular cut-out at one end and the end of the barrel having such cut-out, and means for retaining the nest of' guides in the barrel.

In testimony whereof I affix my signature in presence of tWO Witnesses.

ALBION W. THOMAS. Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2501036 *Jun 11, 1945Mar 21, 1950Northrop Aircraft IncDrill jig
US2602238 *Apr 27, 1949Jul 8, 1952Wellman Clifton EBoring jig or drill guide
US2661929 *May 3, 1948Dec 8, 1953H E Fletcher CompanyJig for drilling key lewis slots
US3006223 *Aug 4, 1959Oct 31, 1961John G BroussardPlate boring device
US3062076 *Aug 2, 1961Nov 6, 1962Craig Carl ETelescoping drill guide or boring jig
US3097891 *Jan 10, 1961Jul 16, 1963James BrideauTool guide
US3282132 *Feb 4, 1964Nov 1, 1966Robert NeuschotzDrill guide
US3713747 *Feb 26, 1971Jan 30, 1973R HaselmoRocker arm stud drilling and pinning kit
US3946493 *Jun 5, 1974Mar 30, 1976Torres John JDrill sight for an electric hand drill
US4227839 *Nov 29, 1978Oct 14, 1980Conway Ceil LAngle indicating attachment for drills
US4780030 *Aug 3, 1987Oct 25, 1988Andrew ZudallManual tap guide
US4948304 *Dec 11, 1987Aug 14, 1990Kobayashi Gimlet Mfg. Co., Ltd.Adjustable tool guide and driver for a bit
US8016522 *Sep 13, 2011Lung-Chih ChenHeat sink for drill bits of different sizes
US20050107801 *Nov 1, 2002May 19, 2005Brian DaviesApparatus for surgical instrument location
US20100236753 *Mar 17, 2009Sep 23, 2010Lung-Chih ChenHeat Sink for Drill Bits of Different Sizes
Cooperative ClassificationB23B49/001