GB448549A - Improvements in or relating to electromagnetic relays operated at a low potential - Google Patents
Improvements in or relating to electromagnetic relays operated at a low potentialInfo
- Publication number
- GB448549A GB448549A GB34380/35A GB3438035A GB448549A GB 448549 A GB448549 A GB 448549A GB 34380/35 A GB34380/35 A GB 34380/35A GB 3438035 A GB3438035 A GB 3438035A GB 448549 A GB448549 A GB 448549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- relay
- switch
- operated
- attract
- 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
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
- H01H47/043—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current making use of an energy accumulator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
Abstract
448,549. Electromagnetic switches. VEREINIGTE EISENBAHN - SIGNALWERKE GES., Blockwerk, Siemensstadt, Berlin. Dec. 11, 1935, No. 34380. Convention date, Dec. 12, 1934. [Class 38 (v)] A circuit arrangement in a railway installation for controlling an electromagnetic relay arranged to be operated at a low potential under the control of a wheeloperated contacting device which may be operated at high speeds includes a condenser connected to be charged or discharged upon operation of the said wheeloperated contacting device, the said condenser being so connected that in the first case the discharge and in the second case the charging of the condenser controls the operation of the relay. As shown in Fig. 1, the windings 1, 2 of a relay in series with a resistance 3 are shunted by a condenser 4 which, when a wheel treadle 5 is operated is charged, resistance 6 representing the line resistance The current flowing through the windings 1, 2 on closure of the treadle switch 5 does not sufficiently energize these windings to attract the armature, but when the treadle switch is again opened, the discharge of the condenser 4 through a circuit including the winding 2 and a condenser 7 supplies to the relay a sufficient number of ampere-turns to attract the armature with certainty. In a modified arrangement shown in Fig. 2, the condenser 8 is connected across the switch 5 in series with the relay 9 so as to be discharged when the switch is closed. The charging current on opening of the switch 5 passes through the relay 9 and lasts sufficiently long to cause the relay to attract its armature. A combination of the two methods Fig. 3 (not shown), may also be employed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE448549X | 1934-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB448549A true GB448549A (en) | 1936-06-10 |
Family
ID=6538151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34380/35A Expired GB448549A (en) | 1934-12-12 | 1935-12-11 | Improvements in or relating to electromagnetic relays operated at a low potential |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB448549A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2758201A (en) * | 1952-08-29 | 1956-08-07 | Westinghouse Air Brake Co | Apparatus for coded signaling systems |
| US2886809A (en) * | 1954-02-19 | 1959-05-12 | Bell Telephone Labor Inc | Multiservice type telephone ringer |
| US2928362A (en) * | 1955-06-01 | 1960-03-15 | Pfaff Ag G M | Electrical control system for group stitch sewing machines and the like |
| US3601664A (en) * | 1969-09-05 | 1971-08-24 | Gen Signal Corp | Wheel detector amplifier |
| US4481555A (en) * | 1981-09-24 | 1984-11-06 | Mitsubishi Denki Kabushiki Kaisha | Electromagnetic contact device |
-
1935
- 1935-12-11 GB GB34380/35A patent/GB448549A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2758201A (en) * | 1952-08-29 | 1956-08-07 | Westinghouse Air Brake Co | Apparatus for coded signaling systems |
| US2886809A (en) * | 1954-02-19 | 1959-05-12 | Bell Telephone Labor Inc | Multiservice type telephone ringer |
| US2928362A (en) * | 1955-06-01 | 1960-03-15 | Pfaff Ag G M | Electrical control system for group stitch sewing machines and the like |
| US3601664A (en) * | 1969-09-05 | 1971-08-24 | Gen Signal Corp | Wheel detector amplifier |
| US4481555A (en) * | 1981-09-24 | 1984-11-06 | Mitsubishi Denki Kabushiki Kaisha | Electromagnetic contact device |
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