GB436968A - Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and out - Google Patents
Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and outInfo
- Publication number
- GB436968A GB436968A GB1235934A GB1235934A GB436968A GB 436968 A GB436968 A GB 436968A GB 1235934 A GB1235934 A GB 1235934A GB 1235934 A GB1235934 A GB 1235934A GB 436968 A GB436968 A GB 436968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- knob
- switch
- disc
- hand
- 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
436,968. Time switches. KARLSSON, A. B., 82, Gitschinerstrasse, Berlin. April 24, 1934, No. 12359. [Class 38 (v)] In a short-time switch in which a knob 11 is rotated by hand through a predetermined number of revolutions or partial revolutions to wind up a spring 37 and then returns slowly under the action of the spring and the control of escapement mechanism 44 to cause, at the end of its return movement, the " on " or " off " movement of a switch which may also be independently operated by hand, the knob 11 is mounted on a spindle carrying a pin 33 which engages the teeth of a serrated disc 30 in the manner of a Geneva stop so as to cause the disc 30 to move on step by step while the knob 11 continuously rotates ; the disc 30 carries an indicating disc 36 marked in hours and the knob 11 is also provided with an indicating flange marked in minutes. The switch itself comprises a contact lever 27 and a hand lever 9, both pivoted at 25 and connected by a deadcentre spring 21. A projection 22 on the lever 27 is adapted in certain circumstances to engage the end of a spring-biassed lever 29 but normally the lever 29 is pressed into the position shown by a pin 31 on the disc 30. The switch may then be operated on and off by hand without interference. To use the device as a time switch, the knob 11 is rotated till the desired number of hours and minutes are indicated on the dials 36 and 10 and then released. The first movement withdraws the pin 31 from the lever 29. The hand lever 9 is then moved into its other position but the contact member 27 is held latched till at the end of the slow running-down movement the pin 31 re-engages the lever 29 and releases the member 27. The action is similar whether the switch is originally " off " or " on," but in one case the nose 22 is above and in the other case below the end 29<d> of the lever 29.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1235934A GB436968A (en) | 1934-04-24 | 1934-04-24 | Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and out |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1235934A GB436968A (en) | 1934-04-24 | 1934-04-24 | Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and out |
Publications (1)
Publication Number | Publication Date |
---|---|
GB436968A true GB436968A (en) | 1935-10-22 |
Family
ID=10003072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1235934A Expired GB436968A (en) | 1934-04-24 | 1934-04-24 | Improvements in or relating to mechanically operated time switches, particularly forswitching electric circuits in and out |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB436968A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6446475B1 (en) * | 2000-06-12 | 2002-09-10 | Itt Manufacturing Enterprises, Inc. | Switchlock assembly with snap-in cam |
-
1934
- 1934-04-24 GB GB1235934A patent/GB436968A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6446475B1 (en) * | 2000-06-12 | 2002-09-10 | Itt Manufacturing Enterprises, Inc. | Switchlock assembly with snap-in cam |
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