GB419114A - Improvements in or relating to key-operated electric tumbler switches - Google Patents
Improvements in or relating to key-operated electric tumbler switchesInfo
- Publication number
- GB419114A GB419114A GB2618233A GB2618233A GB419114A GB 419114 A GB419114 A GB 419114A GB 2618233 A GB2618233 A GB 2618233A GB 2618233 A GB2618233 A GB 2618233A GB 419114 A GB419114 A GB 419114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- switch
- slot
- tumbler
- relating
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
- H01H27/06—Key inserted and then turned to effect operation of the switch
- H01H27/08—Key inserted and then turned to effect operation of the switch wherein the key cannot be removed until the switch is returned to its original position
Landscapes
- Tumbler Switches (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Lock And Its Accessories (AREA)
Abstract
419,114. Tumbler switches; handles. LUNDBERG & SONS, Ltd., A. P., and PEGG, G., 477, Liverpool Road, Holloway, London. Sept. 22, 1933, No. 26182. [Class 38 (v).] A key-operated tumbler switch has the key so formed that it can only be inserted and removed when the switch is in a predetermined position. As shown applied to a two-position tumbler switch, the operating rocker 11 has an upper extension 13 provided with slots 17, 18 into which fit prongs 21, 22 of an operating key 23. The key projects through a slot 25 in a cap 19 formed on the bridge 15 and the edge 24 of the slot engages a notch 27 in the key when in the on position to prevent withdrawal of the key. If the key is inserted wrong way round the switch cannot be operated. In a modification for a three position switch having a central off position, the key is formed with a notch on each side so as to prevent removal except in the central off position. The slot in the bridge cap may be arranged so as to permit removal of the key only in the on position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2618233A GB419114A (en) | 1933-09-22 | 1933-09-22 | Improvements in or relating to key-operated electric tumbler switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2618233A GB419114A (en) | 1933-09-22 | 1933-09-22 | Improvements in or relating to key-operated electric tumbler switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419114A true GB419114A (en) | 1934-11-06 |
Family
ID=10239615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2618233A Expired GB419114A (en) | 1933-09-22 | 1933-09-22 | Improvements in or relating to key-operated electric tumbler switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3686910A1 (en) * | 2019-01-28 | 2020-07-29 | Robert Bosch GmbH | Disconnect switch device |
-
1933
- 1933-09-22 GB GB2618233A patent/GB419114A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3686910A1 (en) * | 2019-01-28 | 2020-07-29 | Robert Bosch GmbH | Disconnect switch device |
| CN111489904A (en) * | 2019-01-28 | 2020-08-04 | 罗伯特·博世有限公司 | Circuit breaker device |
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