GB831983A - Improvements in or relating to subscribers' uniselector circuits - Google Patents
Improvements in or relating to subscribers' uniselector circuitsInfo
- Publication number
- GB831983A GB831983A GB3048156A GB3048156A GB831983A GB 831983 A GB831983 A GB 831983A GB 3048156 A GB3048156 A GB 3048156A GB 3048156 A GB3048156 A GB 3048156A GB 831983 A GB831983 A GB 831983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- circuit
- selector
- relay
- uniselector
- 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
- H01H67/00—Electrically-operated selector switches
- H01H67/02—Multi-position wiper switches
- H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
- H01H67/06—Rotary switches, i.e. having angularly movable wipers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
831,983. Automatic exchange systems. GENERAL ELECTRIC CO. Ltd., and WHEATCROFT, L. Oct. 4, 1957 [Oct. 5, 1956], No. 30481/56. Class 40 (4). The stepping circuit of a subscriber's uniselector includes normally closed interrupter contacts, normally open line relay contacts, and normally closed cut-off relay contacts, the cutoff relay responding, over a circuit which includes the interrupter contacts, to one of two voltage conditions encountered by a test wiper of the uniselector. As shown, the stepping magnet DM interacts with the interrupter contacts dm when line relay LR responds to a call. Operation of LR also connects up test wiper DM4 over low resistance winding 8 of cut-off relay K, rectifier 10, and contacts dm to earth. A short-circuit is also put across terminals 4 and 5 to the subscriber's meter. The busy condition of an outlet is earth and the idle condition is negative resistance battery which causes K to respond. Operation of K busies the seized first selector, extends the line forward which releases LR, and locks up to earth returned from the first selector in a circuit including winding 9 and magnet DM which however does not operate. When K falls back on release of the first selector, wiper DM1 provides a homing circuit for the selector which may have a number of home positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3048156A GB831983A (en) | 1956-10-05 | 1956-10-05 | Improvements in or relating to subscribers' uniselector circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3048156A GB831983A (en) | 1956-10-05 | 1956-10-05 | Improvements in or relating to subscribers' uniselector circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB831983A true GB831983A (en) | 1960-04-06 |
Family
ID=10308343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3048156A Expired GB831983A (en) | 1956-10-05 | 1956-10-05 | Improvements in or relating to subscribers' uniselector circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB831983A (en) |
-
1956
- 1956-10-05 GB GB3048156A patent/GB831983A/en not_active Expired
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