US1451484A - Screw thread - Google Patents

Screw thread Download PDF

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Publication number
US1451484A
US1451484A US546653A US54665322A US1451484A US 1451484 A US1451484 A US 1451484A US 546653 A US546653 A US 546653A US 54665322 A US54665322 A US 54665322A US 1451484 A US1451484 A US 1451484A
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US
United States
Prior art keywords
thread
screw thread
apex
standard
angle
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 - Lifetime
Application number
US546653A
Inventor
Irving C Woodward
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Individual
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Individual
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Publication date
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Priority to US546653A priority Critical patent/US1451484A/en
Application granted granted Critical
Publication of US1451484A publication Critical patent/US1451484A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30—Locking exclusively by special shape of the screw-thread
    • 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
    • Y10S411/924—Coupled nut and bolt
    • Y10S411/929—Thread lock
    • Y10S411/938—Distorted thread

Definitions

  • To-all whomt'p may canoewfi F I Be it known that I, IRVING C. VVooDwARD, a citizen of the United States of America, and a resident of Syracuse, county'of Onondaga, and State of New York, have invented a new and useful Improvement in Screw Threads, of which the following is a specification.
  • This invention relates to screw threads of the general class designed for the purpose of resisting accidental motioniof one of "a pair of coacting threaded members.
  • Several different types of threads have been proposed for this purpose, but usually depart from the normal design to such an extent as to be impractical. It is the object of the' present invention to ing screw thread wit ture from the standard design.
  • the invention consists in any one of-the standard forms of thread, for example, one having a sixty degree included angle, but with this angle decreased from normal near the apex of the thread.
  • the coacting thread may be standard throughout. To cut this type of thread requires taps or dies only slightly altered from those which are employed for cutting the standard thread of the same size and pitch but without the enlarged apex.
  • the drawin shows the enlargement at the apex of the t read somewhat exaggerated.
  • the dotted lines 1. represent the form of'the thread at its apex as it would appear if out
  • the object of the invention is accom with the standard tools for this type of thread, that is, the angle is uniform from the base to the crest of the thread. In the prescut form of thread this angle of the sides 2 is uniform; from the base 3 to about two-thirds more or less of the distance between the base and the crest. The remainder of the thread near the crest has aless included an 1e.
  • a nut havin this screw thread wil lock-tightly on a It having a standard thread, the enlarged crest of the tread wearing off sufficiently to allow the passage of the thread betweenthe threads of the bolt.
  • the thread is not weakened by the present improvement, but is in fact made slightly stronger by having more body, and that the 50 cutting tools required differ only slightly from normal taps and dies.
  • the pitch of the thread is not affected by this improvement since it may remain normal throughout the threaded portion of the member in which the thread is cut.
  • I claim: 1. A member having a thread cut therein. ltJhe angle formed by the sides of the thread eing a point near the crest of the thread, from which point the angle decreases to the apex of the thread.
  • a member' provided with a thread the included angle of ⁇ vhich'is less near the apex of the thread than throughout the main body portion thereof.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Description

Apr. 10, 1923 is. WOODWARD SCREW THREAD Filed Mar. 25 1922 Patented Apr. 10. 1923 UNITED STATES IRVING C. WOODWARD, OF SYRACUSE NEW YORK.
SCREW THREAD.
Application filed March 25, 1922. Serial No. 548,65$.
To-all whomt'p, may canoewfi F I Be it known that I, IRVING C. VVooDwARD, a citizen of the United States of America, and a resident of Syracuse, county'of Onondaga, and State of New York, have invented a new and useful Improvement in Screw Threads, of which the following is a specification.
This invention relates to screw threads of the general class designed for the purpose of resisting accidental motioniof one of "a pair of coacting threaded members. Several different types of threads have been proposed for this purpose, but usually depart from the normal design to such an extent as to be impractical. It is the object of the' present invention to ing screw thread wit ture from the standard design.
lproduce a reliable locka minimum of deparplished by the thread as illustrated in the drawing, which shows a fragmentary view in section of a member provided with the imlproved thread..- riefly stated the invention consists in any one of-the standard forms of thread, for example, one having a sixty degree included angle, but with this angle decreased from normal near the apex of the thread. Thus the somewhat enlarged apex of the thread serves to produce the desired frictional resistance with a coacting thread. The coacting thread may be standard throughout. To cut this type of thread requires taps or dies only slightly altered from those which are employed for cutting the standard thread of the same size and pitch but without the enlarged apex.
The drawin shows the enlargement at the apex of the t read somewhat exaggerated. The dotted lines 1. represent the form of'the thread at its apex as it would appear if out The object of the invention is accom with the standard tools for this type of thread, that is, the angle is uniform from the base to the crest of the thread. In the prescut form of thread this angle of the sides 2 is uniform; from the base 3 to about two-thirds more or less of the distance between the base and the crest. The remainder of the thread near the crest has aless included an 1e. A nut havin this screw thread wil lock-tightly on a It having a standard thread, the enlarged crest of the tread wearing off sufficiently to allow the passage of the thread betweenthe threads of the bolt. Y
A. It may be seen from the foregoing that the thread is not weakened by the present improvement, but is in fact made slightly stronger by having more body, and that the 50 cutting tools required differ only slightly from normal taps and dies. The pitch of the thread is not affected by this improvement since it may remain normal throughout the threaded portion of the member in which the thread is cut.
I claim: 1. A member having a thread cut therein. ltJhe angle formed by the sides of the thread eing a point near the crest of the thread, from which point the angle decreases to the apex of the thread.
2. A member having a standard V, form of thread, but having an enlargement near the apex of thethread. i
3. A member'provided with a thread the included angle of \vhich'is less near the apex of the thread than throughout the main body portion thereof.
Signed at Syracuse, N. Y., this twentyfirst day of March, 1922.
IRVING o. WOODWARD.
uniform from the. base outwardly to 70-
US546653A 1922-03-25 1922-03-25 Screw thread Expired - Lifetime US1451484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US546653A US1451484A (en) 1922-03-25 1922-03-25 Screw thread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US546653A US1451484A (en) 1922-03-25 1922-03-25 Screw thread

Publications (1)

Publication Number Publication Date
US1451484A true US1451484A (en) 1923-04-10

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484645A (en) * 1946-10-23 1949-10-11 Illinois Tool Works Screw fastener
US2581690A (en) * 1949-11-30 1952-01-08 Moehle Walter Locking thread structure
US2787796A (en) * 1952-09-30 1957-04-09 Rosan Joseph Method of converting standard threads into locking threads
US3249141A (en) * 1962-07-16 1966-05-03 Neuschotz Robert Deformed locking thread with relieved areas
US3426820A (en) * 1967-10-05 1969-02-11 Res Eng & Mfg High friction screw
US4527932A (en) * 1982-03-05 1985-07-09 Richard Bergner Gmbh & Co. Self-tapping screw
US4536117A (en) * 1981-11-30 1985-08-20 Mid-Continent Screw Products Company Screw fastener
US4576534A (en) * 1983-08-04 1986-03-18 Illinois Tool Works Inc. Thread form for soft material
DE3610392A1 (en) * 1985-03-28 1986-10-16 Conti Fasteners AG, Zug SCREW FOR UNCLEANED THREADED HOLES
EP0207862A1 (en) * 1985-07-05 1987-01-07 LAURENT INDUSTRIE S.A. Société dite: Threaded bar like a screw and process for making the same
US4810106A (en) * 1987-11-30 1989-03-07 Yazaki Corporation Bearing structure
US5738472A (en) * 1995-10-18 1998-04-14 Honeybee Robotics Inc. Modified locking thread form for fastener
US6863483B2 (en) * 2002-08-20 2005-03-08 Ejot Gmbh & Co. Kb Screw provided with self-locking thread
US20060024147A1 (en) * 2002-11-07 2006-02-02 Andreas Wunderlich Screw for hard materials
US20070280803A1 (en) * 2006-06-02 2007-12-06 Alan Pritchard All-metal thread locking/prevailing torque threaded fastener
US7334975B2 (en) 2001-08-20 2008-02-26 Maclean-Fogg Company Fastener assembly
US7438512B2 (en) 2001-08-20 2008-10-21 Maclean-Fogg Company U-bolt assembly
US7465135B2 (en) 2003-11-14 2008-12-16 Maclean-Fogg Company U-Nut fastening assembly
US20110137355A1 (en) * 2009-12-08 2011-06-09 Rinner James A Systematic Displacement Bone Screw
US8011866B2 (en) 2001-08-20 2011-09-06 Maclean-Fogg Company Locking fastener assembly
WO2013123940A3 (en) * 2012-02-23 2014-07-03 Ruia Global Fasteners Ag Self-tapping screw
US20210156414A1 (en) * 2018-06-19 2021-05-27 Yahata Holdings Corporation Anti-Loosening Metallic Externally Threaded Fastener
DE102020106119B3 (en) 2020-03-06 2021-09-09 Günter Weippert screw

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484645A (en) * 1946-10-23 1949-10-11 Illinois Tool Works Screw fastener
US2581690A (en) * 1949-11-30 1952-01-08 Moehle Walter Locking thread structure
US2787796A (en) * 1952-09-30 1957-04-09 Rosan Joseph Method of converting standard threads into locking threads
US3249141A (en) * 1962-07-16 1966-05-03 Neuschotz Robert Deformed locking thread with relieved areas
US3426820A (en) * 1967-10-05 1969-02-11 Res Eng & Mfg High friction screw
US4536117A (en) * 1981-11-30 1985-08-20 Mid-Continent Screw Products Company Screw fastener
US4527932A (en) * 1982-03-05 1985-07-09 Richard Bergner Gmbh & Co. Self-tapping screw
US4576534A (en) * 1983-08-04 1986-03-18 Illinois Tool Works Inc. Thread form for soft material
DE3610392A1 (en) * 1985-03-28 1986-10-16 Conti Fasteners AG, Zug SCREW FOR UNCLEANED THREADED HOLES
US4973209A (en) * 1985-03-28 1990-11-27 Conti Fasteners Ag Screw for contaminated pre-tapped holes
EP0207862A1 (en) * 1985-07-05 1987-01-07 LAURENT INDUSTRIE S.A. Société dite: Threaded bar like a screw and process for making the same
FR2584464A1 (en) * 1985-07-05 1987-01-09 Laurent Sa THREADED ROD, SUCH AS A SCREW, AND METHOD FOR MANUFACTURING THE SAME
US4810106A (en) * 1987-11-30 1989-03-07 Yazaki Corporation Bearing structure
US5738472A (en) * 1995-10-18 1998-04-14 Honeybee Robotics Inc. Modified locking thread form for fastener
US7410337B2 (en) 2001-08-20 2008-08-12 The Maclean-Fogg Company Fastener assembly
US8011866B2 (en) 2001-08-20 2011-09-06 Maclean-Fogg Company Locking fastener assembly
US7438512B2 (en) 2001-08-20 2008-10-21 Maclean-Fogg Company U-bolt assembly
US7334975B2 (en) 2001-08-20 2008-02-26 Maclean-Fogg Company Fastener assembly
US6863483B2 (en) * 2002-08-20 2005-03-08 Ejot Gmbh & Co. Kb Screw provided with self-locking thread
US20060024147A1 (en) * 2002-11-07 2006-02-02 Andreas Wunderlich Screw for hard materials
US7465135B2 (en) 2003-11-14 2008-12-16 Maclean-Fogg Company U-Nut fastening assembly
US20070280803A1 (en) * 2006-06-02 2007-12-06 Alan Pritchard All-metal thread locking/prevailing torque threaded fastener
US20110137355A1 (en) * 2009-12-08 2011-06-09 Rinner James A Systematic Displacement Bone Screw
US8419779B2 (en) 2009-12-08 2013-04-16 James A. Rinner Systematic displacement bone screw
WO2013123940A3 (en) * 2012-02-23 2014-07-03 Ruia Global Fasteners Ag Self-tapping screw
US20210156414A1 (en) * 2018-06-19 2021-05-27 Yahata Holdings Corporation Anti-Loosening Metallic Externally Threaded Fastener
US11835080B2 (en) * 2018-06-19 2023-12-05 Yahata Holdings Corporation Anti-loosening metallic externally threaded fastener
DE102020106119B3 (en) 2020-03-06 2021-09-09 Günter Weippert screw

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