GB578822A - Delay-action locking or unlocking mechanism - Google Patents
Delay-action locking or unlocking mechanismInfo
- Publication number
- GB578822A GB578822A GB11425/44A GB1142544A GB578822A GB 578822 A GB578822 A GB 578822A GB 11425/44 A GB11425/44 A GB 11425/44A GB 1142544 A GB1142544 A GB 1142544A GB 578822 A GB578822 A GB 578822A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plunger
- bolt
- time delay
- ball
- spring
- 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
- 230000000994 depressogenic effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F3/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork
- G04F3/02—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms
- G04F3/025—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms mechanically actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
- B64D17/40—Packs
- B64D17/52—Opening, e.g. manual
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
578,822. Time-delay locks. ROTHERHAM & SONS. Ltd., and LITCHFIELD, S. E. June 15, 1944, No. 11425. [Class 44] A time lag locking device to release parachutes, operate electric contacts or door locks, comprises a bolt 31 adapted for instance to engage the loop of a parachute and held retracted by a ball 30 which is released by a plunger 11 by means of a step 27 when the plunger has effected a predetermined movement under the influence of the time delay mechanism. When the bolt 31 is moved into locking position the ball 30 which is contained in a slot in the bolt is moved opposite a depression 35. The plunger 11 is then depressed against a spring 17 and the step 27 on the plunger forces the ball into the depression 35. The end of the plunger protrudes from the casing and is held in this position by a release pin. The plunger 11 is controlled by the time delay mechanism 22 by means of a gear train 21 and a rack 19 on the plunger, a free-wheel device allows depression of the plunger, for locking, without disturbing the time delay mechanism. To unlock the bolt the pin is withdrawn from the plunger which after a time delay, releases the ball and allows the bolt 31 to be projected by a spring 34 or if the spring abutment 16 is dispensed with, by the plunger spring 17. The time delay mechanism may be controlled by an escapement, wind vane or eddy current disc. A number of holes may be provided in the end of the plunger for the release pin in order that the apparatus may operate after different time intervals. A modification is shown in which the bolt 31 has a detent to hold the loop of a parachute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11425/44A GB578822A (en) | 1944-06-15 | 1944-06-15 | Delay-action locking or unlocking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11425/44A GB578822A (en) | 1944-06-15 | 1944-06-15 | Delay-action locking or unlocking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB578822A true GB578822A (en) | 1946-07-12 |
Family
ID=9985996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11425/44A Expired GB578822A (en) | 1944-06-15 | 1944-06-15 | Delay-action locking or unlocking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB578822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2435584A1 (en) * | 1978-09-07 | 1980-04-04 | Sargent & Greenleaf | TIMED LOCK WITH DRIVE ARM DRIVE ACTUATOR |
-
1944
- 1944-06-15 GB GB11425/44A patent/GB578822A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2435584A1 (en) * | 1978-09-07 | 1980-04-04 | Sargent & Greenleaf | TIMED LOCK WITH DRIVE ARM DRIVE ACTUATOR |
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