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Publication numberUS824983 A
Publication typeGrant
Publication dateJul 3, 1906
Filing dateJul 11, 1905
Priority dateJul 11, 1905
Publication numberUS 824983 A, US 824983A, US-A-824983, US824983 A, US824983A
InventorsCharles B Farrington
Original AssigneeStephen T Lockwood, Charles B Farrington
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Screw.
US 824983 A
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Description  (OCR text may contain errors)

PATENTED JULY 3, 1906.

fwenwr: %%i% p 0. B. FARRINGTON.

SCREW.

APPLICATION FILED JULY 11. 1905.

By. s

UNITED STATES PATENT OFFICE.

CHARLES B. FARRINGTON, or BRooKLYN, NEWJYORK, ASSIGNOR OF'ONFF FOURTH TO STEPHEN T. LOCKWOOD; F BROOKLYN, NEW YORK.

scREw.

Specification of Letters Patent.

Application filed July 11, 1905- Serial No. 269,247.

' Patented July 3, 1906.

To all whom it may concern.-

Be it known that I, CHARLES B. FARRING TON, a citizen of the United States, residing in the borough ofBrooklyn, in the county of or other material in the usual manner, but

which cannot be Withdrawn without muti-' lation. I attain this. result by the device shown in the accompanying drawings, which Figure 1 is a view of the device, partly in section, with the false head inserted in the screw-body. Fig. 2 is a view of the same with the false head separated from the screwbody. Fig. 3 is an optional form of the device, artly in section, with the false head inserte in the screw-body. Fig. 4 is the optional form of the device shown in Fig. 3 with the false head separated from the screwbody.

Similar letters refer to similar parts through.- out the several views.

In a screw-body 0, provided with exterior screw-threads e e on its lower end section, I provide a longitudinal socket 11, extending om the top of the screw-body downwardly and provided with interior screw-threads f. The top of the screw-body a is smooth and not provided with any transverse slot for the screw-driver, as in the usual form of screw. I also provide a false head 0, the outer edge of which preferably conforms to the outer edge of the top of the screw-body d. Pro'ecting downwardly from'this false head 0 t ere is formed a projection c, screw-threaded to fit the screw-threads f in the. socket bin the screw-body. In use the projection c of false head 0 is inserted in the socket b in the screwbody a, when the screw-body a may be-turne'd and forced into the wood or other material in which the screw-body is to.be .inserted by means of a screw-driver or other suitable tool inserted in the transverse slot d in the false head in the usual manner. The screw-body having been thus inserted it will be found that when it is attempted to withdraw the screw in the usual manner by a reverse turn the false head 0 will be withdrawn and the screw-body a will remain and will not be moved by any 5 5 reverse turn of the false head a. y

- An optional form of my device adapted for a flat-head screw is' shown in Figs. 3 and 4. The false head 7c is provided with a transverse slot 1 and the screw-threaded projection m to fit into the socket 'i in the screw-body g, provided with exterior screw-thread h, and is o erated in the same manner as the form s own in Figs. 1 and 2, above described. Where the screw is to be inserted in a hard substance, the false head may be strengthened by providing a beveled section n at the oint where the projection m is joined to the alse head it, and the upper end of the socket i in the screw-body a is 1n such case flared at '5 to receive the enlarged section a. of the projection m of the false head is.

Having thus described my invention, what I claim is y A screw having a body formed with an en-, 7 5 larged head and with exterior screw-threads, said body having an interiorly-screw-threaded socket which is surrounded by an unbroken wall on the outer face of said head, and means for inserting said screw into the desired position consisting of a head slotted on its outer face and provided with a screwthreaded projection, the relative construe-- tion being such that 'the under face of the lastnamed head may engage the outer face of the first-named head.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES E. FARRINGTON. Witnesses:

J USTIN S. HOLLAN GEORGE M. Fotmns.

Referenced by
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US2444145 *May 24, 1943Jun 29, 1948Rosan JosephInsert and use of same
US3073206 *Apr 8, 1959Jan 15, 1963Eugene A RudolphCap screws with replaceable inserts
US5078718 *Apr 17, 1990Jan 7, 1992Origin Medsystems, Inc.Multi-part method and apparatus for removing pre-placed prosthetic joints and preparing for their replacement
US5190551 *Dec 14, 1990Mar 2, 1993Zimmer, Inc.Controlled apparatus and method for extracting cement mantles from bone recesses
US5222957 *Apr 10, 1992Jun 29, 1993Zimmer, Inc.Method and apparatus for extracting a cement mantle from a bone recess
US5333976 *Jun 23, 1993Aug 2, 1994Dobbrunz Kurt ACenter locking spacing bolt
US5688088 *Jul 15, 1992Nov 18, 1997Excelsior Development Inc.Dynamometric screw or nut
US5787675 *Oct 1, 1996Aug 4, 1998Futagi; KohzohMethod of assembling log walls for log house and clamping bolt to couple the wall
US6026571 *Oct 20, 1997Feb 22, 2000Industrial Strength CorporationMethod of connecting a stem to a base of an article of jewelry
US6033170 *Jan 3, 1995Mar 7, 2000Gold; PeterScrew head nail
US6045126 *Nov 3, 1998Apr 4, 2000Brzezinski; Stan F.Vise jaw and bolt
US6295773 *Jul 22, 1999Oct 2, 2001Louis Karl AltyDevices and methods for securing an object to a first structure through a hole in a second structure
US6318924 *Apr 20, 2000Nov 20, 2001Anthony Paul Schiavo, Jr.Quick-connect for mounting objects
US6464441 *Jul 13, 2001Oct 15, 2002Hettich-Heinze Gmbh & Co. KgDowel pin of an assembly arrangement for joining two furniture parts
US6662511 *Nov 28, 2000Dec 16, 2003Louis Karl AltyDevices and methods for securing an object to a first structure through a hole in a second structure
US6663635 *Jan 7, 2002Dec 16, 2003Synthes (U.S.A.)Bone screw with two-part screw head
US7476228 *Oct 10, 2003Jan 13, 2009Abdou M SamyDistraction screw for skeletal surgery and method of use
US8308776May 28, 2010Nov 13, 2012Samy AbdouDevices and methods for dynamic fixation of skeletal structure
US8398689Sep 14, 2010Mar 19, 2013Samy AbdouDevices and methods for dynamic fixation of skeletal structure
US8636457Jun 24, 2010Jan 28, 2014Robert W. ConnorsTwo-way fastener
US20130095969 *Oct 17, 2012Apr 18, 2013Sram Deutschland GmbhDerailleur Guide Device
DE102011053564A1 *Sep 13, 2011Mar 14, 2013Krauss-Maffei Wegmann Gmbh & Co. KgAssembly device of multilayer armor of e.g. military vehicle, has attachment elements that are connected with other in releasable manner so as to fasten secondary armor plate on primary armor plate
DE102011053564B4 *Sep 13, 2011Apr 25, 2013Krauss-Maffei Wegmann Gmbh & Co. KgMontagevorrichtung, mehrlagige Panzerung und Verfahren zur schichtweisen Montage von Platten
Classifications
Cooperative ClassificationF16B23/003, Y10S411/919