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Publication numberUS142112 A
Publication typeGrant
Publication dateAug 26, 1873
Filing dateApr 23, 1873
Publication numberUS 142112 A, US 142112A, US-A-142112, US142112 A, US142112A
InventorsS. Ladd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in wood-screws
US 142112 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

A. S. LADD @L N. R'NNG.

Wood Screws.

N0. 142,112, PatentedAugust26,1873.

UNITED STATES ATENT OFFICE.

vAUSTIN S. LADD AND CYRUS N. CORNING, OF CONCORD, NEW HAMPSHIRE.

IMPROVEMENT IN wooo-scRews.

Specification forming part of Letters Patent No. 142,112, dated August 26,1873; application filed April 23, 1873.

To all whom it may concern: p

Be it known that we, AUSTIN S. LADD and CYRUS N. CORNING, both of Concord, in the county of Merrimack and State of New Hampshire, declare the following to be a full and complete description of our Improvement in' Wood-Screws, referring to the accompanying drawing, prepared to illustrate the same.

Our improvement consists in combining the German-twist bit with the screw in such manner that the screw will cut its own way or hole in the wood, so as to enter the wood easily,

without splitting the wood, and without the` application of force enough to burst off the screw. This improvement may be used either with a common straight bit or with the German-twist bit 5 but we consider the German bit the best combination, of the form shown at a in the drawing. We also provide a cutter, shown at b, in the shaft of the screw, by which a hole is cut for the shaft of the screw of larger size than is made by the bit portion of the screw. The channel or groove c is cut, not through the threads alone, but into the body of the screw, and retains the wood cut away by the bit in turning in the screw.

We claim- As a new article of manufacture, a woodscrew provided with the cutter b, groove c,

and point ci, combined and operating as shown. A

AUSTIN S. LADD. CYRUS N. CORNING.

Witnesses:

CHAs. C. LUNE, L. D. STEVENS.

Referenced by
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US5759003 *Jul 22, 1996Jun 2, 1998Greenway; John MichaelCombined screw and clearance drill
US6135772 *Mar 13, 1996Oct 24, 2000Jones; Shedrick D.Method and apparatus for implantation
US7374494Nov 19, 2004May 20, 2008Maclean-Fogg CompanyFluid connector
US7465135Nov 14, 2003Dec 16, 2008Maclean-Fogg CompanyU-Nut fastening assembly
US7832971 *Feb 14, 2006Nov 16, 2010Sfs Intec Holding AgThreaded element
US8011866Sep 6, 2011Maclean-Fogg CompanyLocking fastener assembly
US8511958 *Nov 23, 2010Aug 20, 2013Essence Method Refine Co., Ltd.Screw with double notches
US20050103084 *Nov 19, 2004May 19, 2005Maclean-Fogg CompanyFluid connector
US20050180840 *Nov 23, 2004Aug 18, 2005Robert BrewerFluid connector
US20060239561 *Jul 3, 2006Oct 26, 2006Microsoft CorporationWrite anywhere tool
US20070269288 *Jul 9, 2005Nov 22, 2007Sfs Intec Holding AgScrew
US20090274535 *Feb 14, 2006Nov 5, 2009Sfs Intec Holding AgThreaded element
US20100174323 *Mar 19, 2010Jul 8, 2010Newdeal S.A.Self-boring and self-tapping screw for osteosynthesis and compression
US20110293387 *Dec 1, 2011Essence Method Refine Co., Ltd.Screw with double notches
WO1998003799A1 *Jul 22, 1997Jan 29, 1998John Michael GreenwayCombined screw and clearance drill
Classifications
Cooperative ClassificationF16B25/0078