GB289567A - Improvements on adjustable automatic switch for electric lighting - Google Patents
Improvements on adjustable automatic switch for electric lightingInfo
- Publication number
- GB289567A GB289567A GB298527A GB298527A GB289567A GB 289567 A GB289567 A GB 289567A GB 298527 A GB298527 A GB 298527A GB 298527 A GB298527 A GB 298527A GB 289567 A GB289567 A GB 289567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- contact
- time
- spindle
- latch
- 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)
- Push-Button Switches (AREA)
Abstract
289,567. Bignamy, J. B. Feb. 2, 1927. Retractive switches; time-limit devices.-A short-time press-button switch for staircase lighting comprises a pressbutton a which in the downward movement actuates a rack c serving to rotate a pinion b<1> on a spindle e and energizes a clockwork-movement g by winding the spring f. An arm h on the spindle e engages with a tail-piece i on the pivoted contact-member l and moves the contact-member into engagement with the fixed contacts m, n where it is retained, for the time being, by a latch p drawn into the latching position by a spring v extending between the latch and a hook on the contact-member. When the press-button is released, the spindle e rotates slowly under the action of the spring clockwork and after an adjustable timeinterval a projection t on a time-adjustment disc s thereon engages the tail r of the latch and releases the contact-member which returns to the off position under the action of the spring v.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB298527A GB289567A (en) | 1927-02-02 | 1927-02-02 | Improvements on adjustable automatic switch for electric lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB298527A GB289567A (en) | 1927-02-02 | 1927-02-02 | Improvements on adjustable automatic switch for electric lighting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB289567A true GB289567A (en) | 1928-05-02 |
Family
ID=9749729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB298527A Expired GB289567A (en) | 1927-02-02 | 1927-02-02 | Improvements on adjustable automatic switch for electric lighting |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB289567A (en) |
-
1927
- 1927-02-02 GB GB298527A patent/GB289567A/en not_active Expired
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