GB162148A - Improvements in wood screws - Google Patents

Improvements in wood screws

Info

Publication number
GB162148A
GB162148A GB6456/20A GB645620A GB162148A GB 162148 A GB162148 A GB 162148A GB 6456/20 A GB6456/20 A GB 6456/20A GB 645620 A GB645620 A GB 645620A GB 162148 A GB162148 A GB 162148A
Authority
GB
United Kingdom
Prior art keywords
thread
threads
screw
wood
screws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB6456/20A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US136867A priority Critical patent/US1336773A/en
Application filed by Individual filed Critical Individual
Priority to GB6456/20A priority patent/GB162148A/en
Priority to FR511645A priority patent/FR511645A/en
Publication of GB162148A publication Critical patent/GB162148A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
    • 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

Abstract

162,148. Caldwell, J. W. March 3, 1920. Wood-screws; drive-screws.-A single or multithreaded drive or turn-screw has a screwed portion made up of a substantially cylindrical part D and a tapered end part D', the threads on the tapered part increasing in height from the large to the small end. In the double-threaded screw shown, the threads T, T<1> on the conical part D<1> increase in height and decrease in thickness from the thread t<8> to the thread t<2>. The underside of the thread t<2a>, t<8a>, Fig. 2a, is of uniform pitch and constant radius s<1> and is concave or cup shaped, while the upperside of the thread t<2b>, t<8b> has a smaller radius s" and a greater pitch. Instead of being curvilinear in profile, the threads may be straight. The threads are so proportioned that the external diameter at the lower end of the thread is approximately equal to the internal diameter at the upper end of the conical part. With this construction, the thread or threads at the point form incisor edges suitable for rotating the screw when driven by a hammer, and as the screw is entered, the fibres of the wood are gradually compressed. To enable the head H of the screw better to resist a blow, the slot h<4> is formed in two parts, as by suitable milling tools, having a bridge piece h<6> Fig. 5, at the centre. The slots are engaged by a suitable driver R. Specification 21260/99 is referred to.
GB6456/20A 1916-12-14 1920-03-03 Improvements in wood screws Expired GB162148A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US136867A US1336773A (en) 1916-12-14 1916-12-14 Screw
GB6456/20A GB162148A (en) 1916-12-14 1920-03-03 Improvements in wood screws
FR511645A FR511645A (en) 1916-12-14 1920-03-16 Improvements to wood screws

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US136867A US1336773A (en) 1916-12-14 1916-12-14 Screw
GB6456/20A GB162148A (en) 1916-12-14 1920-03-03 Improvements in wood screws
FR511645T 1920-03-16

Publications (1)

Publication Number Publication Date
GB162148A true GB162148A (en) 1921-04-28

Family

ID=22474739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6456/20A Expired GB162148A (en) 1916-12-14 1920-03-03 Improvements in wood screws

Country Status (3)

Country Link
US (1) US1336773A (en)
FR (1) FR511645A (en)
GB (1) GB162148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027573A (en) * 1975-06-20 1977-06-07 Interior Fasteners, Inc. Self-tapping screw fastener with improved thread construction

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787186A (en) * 1952-03-28 1957-04-02 Brogiotti Antonin Screw spike with compression producing thread form
US3793786A (en) * 1971-08-31 1974-02-26 Joslyn Mfg & Supply Co Screw anchor
DE2725071A1 (en) * 1977-06-03 1978-12-21 Artus Feist FASTENING SCREW
JPS5597513A (en) * 1979-01-17 1980-07-24 Topura Kk Selffdrilling screw
AT376021B (en) * 1982-09-23 1984-10-10 Rehau Plastiks In Austria Ges CONNECTING ELEMENT FOR PACKING LAYERS
US20050021036A1 (en) * 2003-07-21 2005-01-27 Whitmore Robin C. Self-drilling, self-tapping bone screw
US8540755B2 (en) 2003-07-21 2013-09-24 Robin C. Whitmore Self-drilling self-tapping bone screw
US20080025816A1 (en) * 2006-07-28 2008-01-31 Jau Yeou Industry Co., Ltd. Multiple-thread screw
DE102013210566A1 (en) * 2013-06-06 2014-12-11 Swg Schraubenwerk Gaisbach Gmbh screw
SE539274C2 (en) * 2015-10-28 2017-06-07 Essve Produkter Ab Easy starting screw
US11066827B2 (en) 2018-03-15 2021-07-20 Daysh Developments, Inc. Precision dry-stack masonry unit
TWI809316B (en) * 2020-09-26 2023-07-21 徐國泰 Anti-pullout low-resistance screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027573A (en) * 1975-06-20 1977-06-07 Interior Fasteners, Inc. Self-tapping screw fastener with improved thread construction

Also Published As

Publication number Publication date
US1336773A (en) 1920-04-13
FR511645A (en) 1920-12-30

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