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Publication numberUS93824 A
Publication typeGrant
Publication dateAug 17, 1869
Publication numberUS 93824 A, US 93824A, US-A-93824, US93824 A, US93824A
InventorsWilliam Humphreys
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improved compound tool por water and gas-pipes
US 93824 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

iiaitrd gatita geteilt @wird Letters Patent No. 93,824, dated August 17, 1869. y

IMPRQVED coMPoUND Toor. oRWA'rER Nb GAs-PIPBS The Schedule refened to in these Letters Patent and making part of the same.

Be it known that l, WILLIAM HUMPHREYS, of

Waterford, Saratoga county, State of New York, have V invented av new and useful machine, denominatedY a Combined Drill, Reamer, and Tap; and I do hereby declare that the following is a ti1ll,clear,aud exact description of the construction and 'operation of the saine, reference being had to thc annexed drawings,

making a partof this specification, in whicl1- Figure l is a perspective Iview, Abeing the tap, with the combined reamer, shown' at B, and the drill at O.

The nature of my invention consists irrproviding the lower end of any ordinary tap with au extension gradually tapered, and formed intoa reamer,\'vith the extremity fashioned with the cutting-edges of an ordinary drill. l

By reference to the drawing, it is plain to be seen that the instrument is a combination of drill, reamer, and tap, and is more especially adapted to tapping gas,'water, and steam-pipes, which has the advantage ot doing away with numbers ot' tools usedforthe purposes aforesaid. It lessensthe number at least one,

and oftentimes two or more.

rlhe other advantages ot' this invention are, that the tap goes straight to its work, being held and balanced in proper position by the yreamer part, without any wabbling, to which ordinary taps are subject. It also keeps the drill rm while cutting through the in neror recedrag side o f the pipe, vand prevents the drill slipping through and leaving an irregular or ragged in'uer edge to the hole, which ordinary drills are liable to.

Another advantage claimed, is the prevention of the escape of gas to any extent, when pert'oratingv the gas-pipes and mains, as is the ease ordinarily, where two-or three separate tools are used.

This instrument may be used fwith the ordinary ratchet-brace, lathe, or otherwise.

lhe tool may be made so as to `en1body only the drill and rentner-,orthe dlill and tap, or the reamer and-tap.

Having thus described my invention,

I claim a combined drill, reamer, and tap, of the form and construction herein setforth.


Witnesses N'. SEYMOUR, H. TEN BRoEK.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2479730 *May 10, 1944Aug 23, 1949Lockheed Aircraft CorpScrew
US2684492 *Oct 25, 1949Jul 27, 1954Gen ElectricCombination drilling and tapping tool
US2898612 *May 10, 1954Aug 11, 1959Hofbaner FrankCombined drill and tap having drill lands extending throughout the length of the tapping portion
US3346894 *Aug 23, 1965Oct 17, 1967Jerome H LemelsonApparatus for controlling rotary and longitudinal movements of a combined tool carrying spindle
US3578762 *Apr 14, 1969May 18, 1971Armco Steel CorpSelf-drilling, reaming and tapping screw
US4116578 *Feb 11, 1977Sep 26, 1978Mikhail Lvovich GelfandRotary tool for making holes
US4225275 *Mar 10, 1978Sep 30, 1980Elliott William LDrill bit
US6931901Oct 21, 2003Aug 23, 2005General Motors CorporationMethod and apparatus for forming a threaded hole in a hydroformed part
US7682111 *Jun 14, 2006Mar 23, 2010Omi Kogyo Co., LtdBore cutter
US20050081589 *Oct 21, 2003Apr 21, 2005Ghiran Mircea M.Method and apparatus for forming a threaded hole in a hydroformed part
US20070212178 *Jun 14, 2006Sep 13, 2007Omi Kogyo Co., Ltd.Bore cutter
Cooperative ClassificationB23G5/06