GB495560A - Improvements in lock mechanism - Google Patents
Improvements in lock mechanismInfo
- Publication number
- GB495560A GB495560A GB2929538A GB2929538A GB495560A GB 495560 A GB495560 A GB 495560A GB 2929538 A GB2929538 A GB 2929538A GB 2929538 A GB2929538 A GB 2929538A GB 495560 A GB495560 A GB 495560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bolt
- spring
- lever
- boss
- follower
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
- E05B13/004—Devices preventing the key or the handle or both from being used locking the handle by locking the spindle, follower, or the like
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C1/00—Fastening devices with bolts moving rectilinearly
- E05C1/08—Fastening devices with bolts moving rectilinearly with latching action
- E05C1/12—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
- E05C1/16—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the handle or member moving essentially in a plane substantially parallel to the wing or frame
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
495,560. Latches. SLEIGH, H. L., CHESTON, A. S., and BOOTH, J. H. April 10, 1937, No. 29295/38. Divided out of 493,768. [Class 44] A latch mechanism comprises a bolt 4 slidably mounted in a casing and biassed to its projected position by a lever 22, pivoted to the casing and acted on by a coiled tension spring 21, the line of pull of the spring being transverse to the direction of movement of the bolt. The other end of the spring is connected to a lever 19 the end 18 of which contacts the boss 8 of a follower 12 on the inside handle spindle and locates the inside handle in its normal position by engaging a notch 16 in the boss. When the handle is turned to retract the bolt, the end 18 of the lever 19 rides on the boss 8, the part 28 of which may be formed as a cam so as to allow the lever 19 to turn about its pivot to keep the length of the spring, and hence the pressure on the bolt, constant, or the cam may be formed so as to diminish the pressure as the bolt is retracted. By turning the inside handle in the opposite direction, the follower 12 is brought behind a shoulder 27 on the follower 13 to prevent actuation by the outside handle, and the end 18 of the lever 19 springs over the projection 17 on the boss 8 to prevent accidental unlocking. An auxiliary spring 29 is provided to project the bolt if the spring 21 breaks. The latch casing is of the type described in Specification 493,768. The keeper may be of known type having safety and main catch faces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2929538A GB495560A (en) | 1937-04-10 | 1937-04-10 | Improvements in lock mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2929538A GB495560A (en) | 1937-04-10 | 1937-04-10 | Improvements in lock mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495560A true GB495560A (en) | 1938-11-10 |
Family
ID=10289272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2929538A Expired GB495560A (en) | 1937-04-10 | 1937-04-10 | Improvements in lock mechanism |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB495560A (en) |
-
1937
- 1937-04-10 GB GB2929538A patent/GB495560A/en not_active Expired
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