GB716319A - Improvements in or relating to time delay mechanisms - Google Patents
Improvements in or relating to time delay mechanismsInfo
- Publication number
- GB716319A GB716319A GB1448751A GB1448751A GB716319A GB 716319 A GB716319 A GB 716319A GB 1448751 A GB1448751 A GB 1448751A GB 1448751 A GB1448751 A GB 1448751A GB 716319 A GB716319 A GB 716319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cam
- pin
- arm
- clockwise
- lug
- 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
-
- 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
- G04F3/027—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 using electrical contacts, e.g. for actuating electro-acoustic device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
716,319. Time switches. MIDGLEY, A. H. May 29, 1952 [June 19, 1951], No. 14487/51. Class 38(5) A time-delay mechanism for a switch comprises a cam 3 mounted on a brass cup 2 and having a pin 4 movable in a slot 1a in a fixed plate 1b. The pin 4 is connected by a spring 10 to a pin 7a in a member 7 mounted on a shaft 6 also carrying an operating arm 8 connected to switch contacts. One arm of a bell-crank lever 12 pivoted at 11 engages the cam, the other arm having a pin 15 in an inclined slot 14b in a member 14 having a slot 14a engaging pivot 11. Member 14 is urged upwards and to the left by a spring 17 and has a latch portion 14c co-operable with a lug 9 on member 7. When arm 8 is moved counter-clockwise, the cam 3 is rotated in the same direction by the engagement of lug 9 with a step 3a on the cam until pin 4 engages the end of slot 1a as shown. This pin is connected to a gear train 19, 27 including a ratchet-and-pawl drive which slips during this movement. Reverse movement of arm 8 rotates the lug 9 clockwise until it is latched beneath portion 14c, thus straining spring 10. The cam 3 is prevented from rotation until a brake 28 operable by a plunger 31 is released, the gear train then 'allowing the cam to turn slowly clockwise. When lever 12 drops down step 3b on the cam, the member 14 is tilted clockwise to release lug 9 and member 7 which are rapidly returned clockwise by spring 10 to rotate the arm 8 and actuate the switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1448751A GB716319A (en) | 1951-06-19 | 1951-06-19 | Improvements in or relating to time delay mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1448751A GB716319A (en) | 1951-06-19 | 1951-06-19 | Improvements in or relating to time delay mechanisms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB716319A true GB716319A (en) | 1954-10-06 |
Family
ID=10042084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1448751A Expired GB716319A (en) | 1951-06-19 | 1951-06-19 | Improvements in or relating to time delay mechanisms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB716319A (en) |
-
1951
- 1951-06-19 GB GB1448751A patent/GB716319A/en not_active Expired
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