GB721200A - Improvements in, or relating to, electric secret contact-combination switching devices - Google Patents
Improvements in, or relating to, electric secret contact-combination switching devicesInfo
- Publication number
- GB721200A GB721200A GB3671/51A GB367151A GB721200A GB 721200 A GB721200 A GB 721200A GB 3671/51 A GB3671/51 A GB 3671/51A GB 367151 A GB367151 A GB 367151A GB 721200 A GB721200 A GB 721200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switches
- contacts
- casing
- plates
- 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
Landscapes
- Switches With Compound Operations (AREA)
- Lock And Its Accessories (AREA)
Abstract
721,200. Secret contact-combination switches. McLELLAN, R. G. May 15, 1952 [Feb. 15, 1951], No. 3671/51. Class 38 (5). A switching device comprises a number of multi-position switches a' ... d<SP>1</SP> the contacts 1 ... 12 of which are connected to the contacts 1 ... 12 of an equal number of switches a ... d, the eight switches being connected in series by suitably connecting the moving contacts e. The switches a<SP>1</SP> ... d<SP>1</SP> are set to predetermined positions, and the circuit between conductors f, g can then only be completed when the switches a ... d are set to corresponding positions. The switches are arranged back-to-back between plates v, v' in a casing w, the pairs of contacts being joined by bars s. The moving contacts comprise forked spring members n engaging the contacts i and a common contact o. The operating spindles l of switches a ... d extend through the front x of the casing, which front, together with plates v, v' and the switches are secured in position by a lock v<SP>2</SP>. The operating knobs of switches a' ... d' extend to the rear and can only be adjusted when the switches are removed from the casing. A switch h is connected across the switches which may thereby be short-circuited, but only after removal of plates v, v' &c. by an authorized person. The controlled circuit may be the ignition circuit of a vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3671/51A GB721200A (en) | 1951-02-15 | 1951-02-15 | Improvements in, or relating to, electric secret contact-combination switching devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3671/51A GB721200A (en) | 1951-02-15 | 1951-02-15 | Improvements in, or relating to, electric secret contact-combination switching devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB721200A true GB721200A (en) | 1955-01-05 |
Family
ID=9762745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3671/51A Expired GB721200A (en) | 1951-02-15 | 1951-02-15 | Improvements in, or relating to, electric secret contact-combination switching devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB721200A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2213195B (en) * | 1987-12-07 | 1992-06-03 | David Hoffman | Anti-theft arrangement for a vehicle |
-
1951
- 1951-02-15 GB GB3671/51A patent/GB721200A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2213195B (en) * | 1987-12-07 | 1992-06-03 | David Hoffman | Anti-theft arrangement for a vehicle |
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