US1934347A - Screw - Google Patents

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Publication number
US1934347A
US1934347A US569040A US56904031A US1934347A US 1934347 A US1934347 A US 1934347A US 569040 A US569040 A US 569040A US 56904031 A US56904031 A US 56904031A US 1934347 A US1934347 A US 1934347A
Authority
US
United States
Prior art keywords
slot
screw
head
abutment
screwdriver
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
US569040A
Other languages
English (en)
Inventor
Flesselles Warren Frederick
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1934347A publication Critical patent/US1934347A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

  • This invention relates to improvements in screws for wood or metal operable by a screwdriver.
  • An object of the present invention is to provide a screw which will obviate or minimize the above iiefects and ensure that the screw is inserted and ithdrawn in a more expeditious manner.
  • the head of the rew which may be of the countersunk, cheese head, or other type, is provided with a slot for engagement'by a screwdriver.
  • the slot is unlike that usually provided in that it has a central stop or abutment which is formed by displacing some of the metal adjacent to the slot and is adapted to be bridged by the operative face of the screwdriver, said screwdriver being provided with a gap receive the abutment.
  • the abutment divides the slot in the screw :entrally, and by engagement with the gap prorided in the screwdriver blade tends to prevent .ateral movement thereof with respect to the ;crew, with the result that the tendency of the )lade to leave the said slot is eliminated.
  • Figure 1 is a plan view of my improved screw :howing the central abutment.
  • Figure 2 is an elevational view of the head of Figures 5 and 6 illustrate the preferred method adopted for forming the abutment across the slot in the screw.
  • Figure 5 shows a die preparatory to descending upon the head of the screw and
  • Figure 6 shows the head of the screw after the die has descended, and forced some of the metal of which the head is composed, into the slot to form the abutment.
  • the slot '7 for engagement by the screwdriver may be formed by milling or stamping in the usual manner after which operation it is necessary to produce the abutment 8 centrally of the slot 7.
  • the abutment 8 as seen in Figure 3 is formed by two portions or lugs 10 of metal which have been pressed into the slot 7 by means of a die such as that diagrammatically represented at 11 in Figures 5 and 6.
  • the die 11 leaves a space 12 in the head of the screw the depth of which is less than the depth of the slot 7.
  • the length and width of the die 11 and the extent to which it is forced into the head of the screw can easily be determined by calculating the volume of metal desired to form the abutment 8.
  • the screwdriver used with the present invention will require to have a gap such as that indicated at 13 in Figure 4.
  • a screw comprising a threaded stem, a slotted head integral therewith and provided with a top face, and a narrow abutment formed in the slot in said head and constituted by two narrow projections disposed centrally in and transversely of said slot, said projections beihg spaced from the top face of the screw head and in the direction of the bottom of the slot, and consisting of equal portions of metal forced from the opposed walls of said slot.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Connection Of Plates (AREA)
US569040A 1930-10-15 1931-10-15 Screw Expired - Lifetime US1934347A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AU1934347X 1930-10-15
GB31759/31A GB377538A (en) 1930-10-15 1931-11-16 Improvements in screws
NL59271A NL30612C (en(2012)) 1930-10-15 1931-11-25
BE384489T 1931-11-25
FR726935T 1931-11-26

Publications (1)

Publication Number Publication Date
US1934347A true US1934347A (en) 1933-11-07

Family

ID=40627306

Family Applications (1)

Application Number Title Priority Date Filing Date
US569040A Expired - Lifetime US1934347A (en) 1930-10-15 1931-10-15 Screw

Country Status (5)

Country Link
US (1) US1934347A (en(2012))
BE (1) BE384489A (en(2012))
FR (1) FR726935A (en(2012))
GB (1) GB377538A (en(2012))
NL (1) NL30612C (en(2012))

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676510A (en) * 1950-09-23 1954-04-27 Nat Screw & Mfg Company Screw driver slot with driver wedging means
US4091708A (en) * 1976-04-27 1978-05-30 Ralph Spencer Jacobson Screw
US5236235A (en) * 1992-06-29 1993-08-17 Chautauqua Hardware Company Concealed screw rose mounting system
US5403139A (en) * 1993-02-01 1995-04-04 Snap-On Incorporated Sliding latch mechanism for a cabinet drawer
US5562547A (en) * 1994-08-12 1996-10-08 Borzone; Richard Self-attachment screw
US5582548A (en) * 1990-04-10 1996-12-10 Czegledi; Imre Method of manufacture of anti-slip fastener
US6554173B1 (en) * 1997-02-21 2003-04-29 Neil L. Currie Robertson driver
USD1015859S1 (en) * 2021-12-21 2024-02-27 Hoffman Enclosures, Inc. Fastener

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131114A (en) * 1982-11-25 1984-06-13 Chang Chung Hsing Screw and screwdriver

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676510A (en) * 1950-09-23 1954-04-27 Nat Screw & Mfg Company Screw driver slot with driver wedging means
US4091708A (en) * 1976-04-27 1978-05-30 Ralph Spencer Jacobson Screw
US5582548A (en) * 1990-04-10 1996-12-10 Czegledi; Imre Method of manufacture of anti-slip fastener
US5236235A (en) * 1992-06-29 1993-08-17 Chautauqua Hardware Company Concealed screw rose mounting system
US5403139A (en) * 1993-02-01 1995-04-04 Snap-On Incorporated Sliding latch mechanism for a cabinet drawer
US5562547A (en) * 1994-08-12 1996-10-08 Borzone; Richard Self-attachment screw
US6554173B1 (en) * 1997-02-21 2003-04-29 Neil L. Currie Robertson driver
USD1015859S1 (en) * 2021-12-21 2024-02-27 Hoffman Enclosures, Inc. Fastener

Also Published As

Publication number Publication date
FR726935A (fr) 1932-06-04
GB377538A (en) 1932-07-28
BE384489A (en(2012)) 1931-12-31
NL30612C (en(2012)) 1933-08-15

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