GB536854A - Improved time-switching device for apparatus or machinery employing electric current - Google Patents
Improved time-switching device for apparatus or machinery employing electric currentInfo
- Publication number
- GB536854A GB536854A GB459440A GB459440A GB536854A GB 536854 A GB536854 A GB 536854A GB 459440 A GB459440 A GB 459440A GB 459440 A GB459440 A GB 459440A GB 536854 A GB536854 A GB 536854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- lever
- arm
- switching device
- clockwork
- 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)
- Electromechanical Clocks (AREA)
Abstract
536,854. Time switches. ALKIN R. L., and CRANHAM D. R. March 12, 1940, No. 4594. [Class 38 (v)] In a switching device adapted to close a circuit for a pre-determined time, setting for the desired time is first effected by rotation of a shaft j, provided with knob and dial, through a predetermined angle, and a lever l is then rotated clockwise to turn a shaft k thereby moving a mercury switch mounted on the shaft into the " on" position and releasing the clockwork mechanism. In the form shown the shaft k carries a lever m n which carries an arm o normally engaging the fly p of the clockwork but moved away from it when the shaft k is rotated . The rotation also moves a pin m<1> so that it engages and is locked in a recess q' on a lever q, q<1> biassed by a spring s. After the pre-determined time has elapsed, an arm j' on the shaft j engages the arm q<1> and releases the lever m, n which returns to its original position operating the mercury switch " off." In a modification, the shaft j of the clockwork is held against rotation by a pawl lever engaging a ratchet wheel on the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459440A GB536854A (en) | 1940-03-12 | 1940-03-12 | Improved time-switching device for apparatus or machinery employing electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459440A GB536854A (en) | 1940-03-12 | 1940-03-12 | Improved time-switching device for apparatus or machinery employing electric current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB536854A true GB536854A (en) | 1941-05-29 |
Family
ID=9780100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB459440A Expired GB536854A (en) | 1940-03-12 | 1940-03-12 | Improved time-switching device for apparatus or machinery employing electric current |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB536854A (en) |
-
1940
- 1940-03-12 GB GB459440A patent/GB536854A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB341464A (en) | Improvements in or relating to control system for radio instruments | |
| GB536854A (en) | Improved time-switching device for apparatus or machinery employing electric current | |
| GB1250150A (en) | ||
| US3107539A (en) | Release mechanism for preset timers | |
| GB982781A (en) | Improvements in or relating to combined electric alarm clocks and time-switches | |
| US2242517A (en) | Automatic electric time switch | |
| US1693721A (en) | Clock-controlled switch | |
| US2304627A (en) | Switching apparatus | |
| US1951027A (en) | Time switch | |
| US1666129A (en) | Time switch | |
| GB907072A (en) | Improvements in time switch | |
| SU111551A1 (en) | Automatic electrical switch, mainly for controlling river traffic signs | |
| US1175541A (en) | Circuit-timing device. | |
| GB558969A (en) | Improvements in or relating to electro magnetically-operated step-by-step mechanism | |
| US2077631A (en) | Timing mechanism | |
| GB1076291A (en) | Improvements in interval timer | |
| US2228197A (en) | Time switch | |
| US2499046A (en) | Means for operating an electric switch at a predetermined time | |
| GB963223A (en) | Timing device for the control of x-ray equipment | |
| GB272776A (en) | Improvements in mechanism for opening and closing taps or electric switches at predetermined times | |
| GB749891A (en) | Improvements in amusement apparatus | |
| GB743206A (en) | Improvements in or relating to clockwork mechanisms for controlling alarm devices | |
| GB815087A (en) | Cam-actuated electric switch | |
| GB436968A (en) | Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and out | |
| GB676937A (en) | Three-position electric switch |