GB782659A - Improvements in electric time switches - Google Patents
Improvements in electric time switchesInfo
- Publication number
- GB782659A GB782659A GB3737154A GB3737154A GB782659A GB 782659 A GB782659 A GB 782659A GB 3737154 A GB3737154 A GB 3737154A GB 3737154 A GB3737154 A GB 3737154A GB 782659 A GB782659 A GB 782659A
- Authority
- GB
- United Kingdom
- Prior art keywords
- knob
- projection
- cam
- recess
- spindle
- 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
- G04F3/06—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 electric driving mechanisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
782,659. Time switches. HORSTMANN GEAR CO., Ltd. Dec. 28, 1955 [Dec. 24, 1954], No. 37371/54. Class 38 (5). A switch similar to that of Specification 774,186 has a knob 35 attached to a spindle 17 carrying a contact-operating cam 23. The knob is normally urged to the right by a spring 24 so that a projection 41 on a concentric ring 36 engages a recess 42 in the rear of the knob, so that rotation of the latter causes rotation of the ring 36 to set the duration of the operation relative to a scale 43 and the cam 23 closes contacts 13 to start the timing motor. To delay the start of the operation, the knob is pulled to the left and further rotated to the desired extent, the projection 41 riding over the rear face of the knob and the ring 36 being held against rotation by a friction pad 51. A motor restores the spindle over gears 14, 15, 16 and a friction clutch 18 until spring 24 moves the knob to the right when projection 41 and recess 42 re-engage, this movement causing cam 23 to close contacts 26. The spindle continues to rotate until a cam recess 27 comes opposite a projection 50 on contact arm 30, so that switches 13, 26 open. If the knob is turned so that its pointer 44 comes opposite numeral 4 on scale 43, switch 26 is closed, but a projection 29 on the cam holds motor switch 13 open, so that the timing mechanism becomes inoperative. Specifications 782,660 and 782,661 also are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3737154A GB782659A (en) | 1954-12-24 | 1954-12-24 | Improvements in electric time switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3737154A GB782659A (en) | 1954-12-24 | 1954-12-24 | Improvements in electric time switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB782659A true GB782659A (en) | 1957-09-11 |
Family
ID=10395946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3737154A Expired GB782659A (en) | 1954-12-24 | 1954-12-24 | Improvements in electric time switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB782659A (en) |
-
1954
- 1954-12-24 GB GB3737154A patent/GB782659A/en not_active Expired
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