GB361519A - Improvements in electromagnetic switches as used in telephone or like systems - Google Patents
Improvements in electromagnetic switches as used in telephone or like systemsInfo
- Publication number
- GB361519A GB361519A GB3016330A GB3016330A GB361519A GB 361519 A GB361519 A GB 361519A GB 3016330 A GB3016330 A GB 3016330A GB 3016330 A GB3016330 A GB 3016330A GB 361519 A GB361519 A GB 361519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- earth
- wiper
- operates
- free
- switches
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/241—Differential pressure systems
- B60T13/242—The control valve is provided as one unit with the servomotor cylinder
- B60T13/243—Mechanical command of the control valve, mechanical transmission to the brakes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H63/00—Details of electrically-operated selector switches
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Toys (AREA)
- Structure Of Telephone Exchanges (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
361,519. Automatic exchange switches and systems. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and CHRISTIAN, D. A., Morven, Charlton Road, Charlton, both in London. Oct. 8, 1.930, No. 30163. [Class 40 (iv).] A single drive rotary switch is provided with two wiper sets, one wiper set connecting with inlets and the other with outlets, and is arranged so that in one complete cycle each of the inlet terminals is connected with each of the outlet terminals. The use of such switches as group selectors in a bypath system is described. As shown in Figs. 1 and 2, two ratchet wheels 13, 14, of different size and having a different number of teeth, are operated by pawls 9, 10 connected together and to armature 6 of electromagnet 5. Ten contacts are, for example, provided on the bank associated with ratchet 14 and eleven with that associated with ratchet 13, the eleventh contact being spare. The wipers are arranged so that as one tip leaves a contact bank another tip enters it, and, as both ratchets are stepped together, it follows that one wiper lags behind one step for each complete traverse of the banks and after ten complete traverses, forming a cycle, each contact in one back has been associated with each contact in the other. Instead of making the two ratchets of different sizes, ratchets of the same size can be used provided with teeth of different pitch, lost motion being provided on the pawl of one of the ratchets. Alternately one wiper set can be arranged to move one step for each complete traverse of the other wiper set. Fig. 6 illustrates the use of these switches as couplers in a bypath system, first and second couplers FC and SC, both of this type being provided. The preceding switch tests for absence of earth on c and when this is found earth is connected to p to energize T, operating X and connecting A to the b wire. The impulse train is transmitted from the register controller and A responds, repeating the impulses to VM to step control switch CS. D operates on the first impulse and holds during the train, but when the series ceases, D releases and RM steps the wipers of CS in search of a free first coupler, denoted by earth on wiper 1, and a free second coupler denoted by absence of earth over wiper 2. Relay GP is common to a group of links and is provided to prevent more than one link in a group being marked for use at the same time. Assuming couplers FC and SC are found free and available, TC operates opening the circuit of RM and completing a circuit over wiper 3 for RF and GP in series. RF completes a circuit for DFM which starts FC hunting for the calling circuit, denoted by earth on e and for a free outlet to SC, denoted by absence of earth on r. When these conditions are complied with TF operates and switches through. TF also connects earth to wiper 5 of CS to operate EF which enables RS to pull up. RS completes a circuit for DSM of the second coupler SC and this switch hunts for the calling link, marked by an earth on d and for a free outlet, marked by absence of earth on r, and when these conditions are found TS operates and switches through. Relay ES operates over 6 of CS and K pulls up over its winding (1) and locks over its winding (II) to the incoming p wire. T, X, and A release, relay T removing battery from the a wire to allow the next digit to be transmitted. Relays TC and TD fall away and ZM operates to release the control switch. EF, ES, RF, RS, and GP fall away. The connection is released by the removal of earth from the c wire, releasing TF, TS, and by the consequential removal of earth from the p wire releasing K. In an alternative arrangement the control switch CS also searches for a free link LC, the two couplers then searching simultaneously for the marked link. The links may be preselected and allocated for use in turn by a distributer.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US509856A US2107110A (en) | 1930-10-08 | 1931-01-19 | Power operating mechanism |
US563953A US1903211A (en) | 1930-10-08 | 1931-09-21 | Electromagnetic switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3649534A GB446770A (en) | 1934-12-20 | 1934-12-20 | Improvements in electromagnetic switches as used in telephone and like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB361519A true GB361519A (en) | 1931-11-26 |
Family
ID=10388685
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3016330A Expired GB361519A (en) | 1930-10-08 | 1930-10-08 | Improvements in electromagnetic switches as used in telephone or like systems |
GB3649534A Expired GB446770A (en) | 1930-10-08 | 1934-12-20 | Improvements in electromagnetic switches as used in telephone and like systems |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3649534A Expired GB446770A (en) | 1930-10-08 | 1934-12-20 | Improvements in electromagnetic switches as used in telephone and like systems |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB361519A (en) |
-
1930
- 1930-10-08 GB GB3016330A patent/GB361519A/en not_active Expired
-
1934
- 1934-12-20 GB GB3649534A patent/GB446770A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB446770A (en) | 1936-05-06 |
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