US449037A - Wood-screw - Google Patents

Wood-screw Download PDF

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Publication number
US449037A
US449037A US449037DA US449037A US 449037 A US449037 A US 449037A US 449037D A US449037D A US 449037DA US 449037 A US449037 A US 449037A
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Prior art keywords
screw
wood
nick
head
chapman
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Expired - Lifetime
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0015—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially rectangular, e.g. one-slot head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/919—Screw having driving contacts

Definitions

  • I make the nick (t wider below the surface of the head than thereat and curved from side to side at the bottom, said curve being preferably on a greater radius than the half of the width of the nick at the top.
  • the nick of this form may be produced in any approved Way, as by first sawing the nick in the usual way the width of the top, but with a saw having a suitablycurved edge, and then, while the head of the screw is confined in suitable dies, punching out the wider porbottom of the nick, because it distributes the stresses over the whole of the curved sur' face, while in the angular form the stresses are concentrated in the angles, so that the head is much Weaker and breaks in many cases where it will notas I have constructed it.

Description

(No Model.)
G. T. CHAPMAN.
WOOD SCREW.
No. 449,037. Patented Mar. 24, 1891.
Invader;
. UNITED STATES PATENT OFFICE.
GEORGE T. CHAPMAN, O F IVHITE PLAINS, NEIV YORK.
WOOD-SCREW..
SPECIFICATION forming part of Letters Patent No. 4A9,03'7, dated March 24, 1891.
Application filed July 23, 1890. Serial No. 359,590. (No model.)
which are to strengthen the head against the tendency of breakage by the screw-driver and so that it will retain the filling of putty generally applied in finishing interior Work more effectually, all as hereinafter fully described, reference being made to the accompanying drawings, in Which- Figure 1 is a side elevation of a wood-screw constructed in accordance with my invention, and Fig. 2 is a top view.
I make the nick (t wider below the surface of the head than thereat and curved from side to side at the bottom, said curve being preferably on a greater radius than the half of the width of the nick at the top. The nick of this form may be produced in any approved Way, as by first sawing the nick in the usual way the width of the top, but with a saw having a suitablycurved edge, and then, while the head of the screw is confined in suitable dies, punching out the wider porbottom of the nick, because it distributes the stresses over the whole of the curved sur' face, while in the angular form the stresses are concentrated in the angles, so that the head is much Weaker and breaks in many cases where it will notas I have constructed it.
The advantage of this form of nick for retaining putty in inside'work is obvious. If necessary, I will case-harden the head .to prevent the edges of the nick from being jammed or upset by the pressure of the screw-driver.
I claim I The improved wood-screw having a nick wider below the surface of the head than thereat and curved from side to side in the bottom, substantially as described.
In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 26th day of April, 1890.
GEO. T. CHAPMAN.
Witnesses:
W. J. MORGAN, W. B. EARLE.
US449037D Wood-screw Expired - Lifetime US449037A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567466A (en) * 1946-04-22 1951-09-11 Robert L Bartlett Screw driver
US2850788A (en) * 1956-05-11 1958-09-09 Albert J Rypysc Embalming stopper
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
EP0064899A2 (en) * 1981-04-27 1982-11-17 Thomson-Csf Device for image transference by optical cable, and utilisation with a video camera
US20030125745A1 (en) * 2001-11-05 2003-07-03 Bio One Tech Inc. Bone-fixing device
US20050022442A1 (en) * 2003-02-07 2005-02-03 The Coleman Company, Inc. Mosquito trapping apparatus utilizing cooled carbon dioxide
US20180010628A1 (en) * 2016-07-11 2018-01-11 The Boeing Company Captive bolt and retainer
USD845118S1 (en) * 2017-04-20 2019-04-09 A-Stainless International Co., Ltd. Screw

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567466A (en) * 1946-04-22 1951-09-11 Robert L Bartlett Screw driver
US2850788A (en) * 1956-05-11 1958-09-09 Albert J Rypysc Embalming stopper
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
EP0064899A2 (en) * 1981-04-27 1982-11-17 Thomson-Csf Device for image transference by optical cable, and utilisation with a video camera
EP0064899A3 (en) * 1981-04-27 1983-06-15 Thomson-Csf Device for image transference by optical cable, and utilisation with a video camera
US20030125745A1 (en) * 2001-11-05 2003-07-03 Bio One Tech Inc. Bone-fixing device
US20050022442A1 (en) * 2003-02-07 2005-02-03 The Coleman Company, Inc. Mosquito trapping apparatus utilizing cooled carbon dioxide
US20180010628A1 (en) * 2016-07-11 2018-01-11 The Boeing Company Captive bolt and retainer
US10495133B2 (en) * 2016-07-11 2019-12-03 The Boeing Company Captive bolt and retainer
USD845118S1 (en) * 2017-04-20 2019-04-09 A-Stainless International Co., Ltd. Screw

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