GB190221714A - Improvements in or relating to Permutation Locks - Google Patents

Improvements in or relating to Permutation Locks

Info

Publication number
GB190221714A
GB190221714A GB190221714DA GB190221714A GB 190221714 A GB190221714 A GB 190221714A GB 190221714D A GB190221714D A GB 190221714DA GB 190221714 A GB190221714 A GB 190221714A
Authority
GB
United Kingdom
Prior art keywords
tumblers
cover
holes
bolt
alignment
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
Inventor
Alfred Julius Boult
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 GB190221714A publication Critical patent/GB190221714A/en
Expired legal-status Critical Current

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Abstract

21,714. Boult, A. J., [Mills, M. B.]. Oct. 6. Locks, permutation.-In permutation locks having tumblers w h i c h are brought into register to enable the b o I t to be actuated, a cover is provided to prevent the combination from being discovered, by the senses of feeling or hearing. A plate A is provided with slots to receive tumblers or discs B, spacing-bosses being secured to the tongues formed by the slots. The tumblers are mounted on a shaft d, and have teeth provided with numerals &c., backward rotation of the tumblers being prevented by spring pawls. Each tumbler is provided with an eccentric hole f, and the bolt E has dogs E<1> adapted to engage these holes, so that the bolt may be withdrawn when the holes f are brought into proper alignment. A cover D, preferably provided with disc-shaped ends D<1> journalled on the shaft d, is arranged to cover or uncover the tumblers. The ends D' are provided with holes adapted to be brought into alignment with the dogs E<1> when the cover is closed to hide the tumblers. In order to retract the bolt, when shot, it is necessary to shoot it still further, and then to rotate the cover so as to disclose the tumblers. The tumblers are then set to bring the holes f into alignment, and the cover is returned to its former position so as to bring the holes f and the holes in the ends D' into alignment to enable the bolt to be actuated. It is difficult to discover the combination, as when the cover is open, the dogs E<1> take against the end of the cover, and when the cover is closed the tumblers are not visible.
GB190221714D 1902-10-06 1902-10-06 Improvements in or relating to Permutation Locks Expired GB190221714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190221714T 1902-10-06

Publications (1)

Publication Number Publication Date
GB190221714A true GB190221714A (en) 1902-12-18

Family

ID=32431435

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190221714D Expired GB190221714A (en) 1902-10-06 1902-10-06 Improvements in or relating to Permutation Locks

Country Status (1)

Country Link
GB (1) GB190221714A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766760A (en) * 1972-06-02 1973-10-23 J Mohrhauser Multiple wheel combination lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766760A (en) * 1972-06-02 1973-10-23 J Mohrhauser Multiple wheel combination lock

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