GB196070A - Improvements in or relating to manhole covers and frames - Google Patents

Improvements in or relating to manhole covers and frames

Info

Publication number
GB196070A
GB196070A GB110222A GB110222A GB196070A GB 196070 A GB196070 A GB 196070A GB 110222 A GB110222 A GB 110222A GB 110222 A GB110222 A GB 110222A GB 196070 A GB196070 A GB 196070A
Authority
GB
United Kingdom
Prior art keywords
key
arms
hole
cover
frames
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
GB110222A
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.)
YOUNG AND MARTEN Ltd
Original Assignee
YOUNG AND MARTEN 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 YOUNG AND MARTEN Ltd filed Critical YOUNG AND MARTEN Ltd
Priority to GB110222A priority Critical patent/GB196070A/en
Publication of GB196070A publication Critical patent/GB196070A/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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures
    • F16J13/08—Detachable closure members; Means for tightening closures attached by one or more members actuated to project behind a part or parts of the frame

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Sewage (AREA)

Abstract

196,070. Edwards, E. M., and Young & Marten, Ltd. Jan. 13, 1922. Locks, square-key and like; obstruction-bars.- Relates to man-hole covers of the kind having a key-plate 13 on which revolves a member 23 carrying the arms 22 which engage recesses 33 in the frame to lock the cover. According to the invention, the key-plate is provided with a keyhole 18 identical in form with the key-hole 25 in the member 23, but set at an angle thereto when the arms 22 are in locking position. The key is first used to remove the dust-excluding plug 17, and after insertion in the key-hole 18 is turned in the circular recess 19 until it registers with the key-hole 25. The arms 22 may then be turned to unlock the cover. When locking the cover the ends of the arms 22 ride up inclines 34 on the frame and pass into recesses 35, as shown in Fig. 9.
GB110222A 1922-01-13 1922-01-13 Improvements in or relating to manhole covers and frames Expired GB196070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB110222A GB196070A (en) 1922-01-13 1922-01-13 Improvements in or relating to manhole covers and frames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB110222A GB196070A (en) 1922-01-13 1922-01-13 Improvements in or relating to manhole covers and frames

Publications (1)

Publication Number Publication Date
GB196070A true GB196070A (en) 1923-04-13

Family

ID=9716183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB110222A Expired GB196070A (en) 1922-01-13 1922-01-13 Improvements in or relating to manhole covers and frames

Country Status (1)

Country Link
GB (1) GB196070A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756511A1 (en) * 1977-01-05 1978-07-06 Robert Dumortier LOCKING DEVICE FOR MANHOLE COVERS OF STREET ENTRANCE CHAMBERS, COMPOSING OF A REMOVABLE LID AND A FIXED BASE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756511A1 (en) * 1977-01-05 1978-07-06 Robert Dumortier LOCKING DEVICE FOR MANHOLE COVERS OF STREET ENTRANCE CHAMBERS, COMPOSING OF A REMOVABLE LID AND A FIXED BASE

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