GB1125930A - Security bolts - Google Patents

Security bolts

Info

Publication number
GB1125930A
GB1125930A GB4394366A GB4394366A GB1125930A GB 1125930 A GB1125930 A GB 1125930A GB 4394366 A GB4394366 A GB 4394366A GB 4394366 A GB4394366 A GB 4394366A GB 1125930 A GB1125930 A GB 1125930A
Authority
GB
United Kingdom
Prior art keywords
bolt
recess
cavity
security bolts
head
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
GB4394366A
Inventor
Stanley Michael Thompson
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.)
Dorman & Smith Ltd
Original Assignee
Dorman & Smith Ltd
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 Dorman & Smith Ltd filed Critical Dorman & Smith Ltd
Priority to GB4394366A priority Critical patent/GB1125930A/en
Publication of GB1125930A publication Critical patent/GB1125930A/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
    • 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
    • F16B23/0046—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 having one eccentric circular or polygonal recess or protrusion

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)

Abstract

1,125,930. Tamper proof bolts. DORMAN & SMITH Ltd. 18 Aug., 1967 [1 Oct., 1966], No. 43943/66. Heading F2H. [Also in Division B4] A bolt 10 has an axial circular cavity 16 in its enlarged head 15 and a recess 17 in the base of the cavity, the recess being offset relative to the axis of the bolt. The head of the bolt is tapered to prevent it being gripped by pliers so that the only means of tightening or undoing the bolt is a key 18 having a peg 22 which engages the recess 17.
GB4394366A 1966-10-01 1966-10-01 Security bolts Expired GB1125930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4394366A GB1125930A (en) 1966-10-01 1966-10-01 Security bolts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4394366A GB1125930A (en) 1966-10-01 1966-10-01 Security bolts

Publications (1)

Publication Number Publication Date
GB1125930A true GB1125930A (en) 1968-09-05

Family

ID=10431053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4394366A Expired GB1125930A (en) 1966-10-01 1966-10-01 Security bolts

Country Status (1)

Country Link
GB (1) GB1125930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258596A (en) * 1978-01-18 1981-03-31 Southco, Inc. Tamper-resistant fastener
GB2197382A (en) * 1986-11-15 1988-05-18 Jon Ross Malone Sailboard anti-theft device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258596A (en) * 1978-01-18 1981-03-31 Southco, Inc. Tamper-resistant fastener
GB2197382A (en) * 1986-11-15 1988-05-18 Jon Ross Malone Sailboard anti-theft device

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