GB673920A - Improvements in or relating to electric make and break switches - Google Patents
Improvements in or relating to electric make and break switchesInfo
- Publication number
- GB673920A GB673920A GB3251349A GB3251349A GB673920A GB 673920 A GB673920 A GB 673920A GB 3251349 A GB3251349 A GB 3251349A GB 3251349 A GB3251349 A GB 3251349A GB 673920 A GB673920 A GB 673920A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- motor
- shaft
- fixed
- pins
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/781—Secondary Surveillance Radar [SSR] in general
- G01S13/784—Coders or decoders therefor; Degarbling systems; Defruiting systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/04—Apparatus or circuits at the transmitting end
- H04L15/22—Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Toys (AREA)
Abstract
673,920. Time switches. FLIGHT REFUELLING, Ltd. Dec. 18, 1950. [Dec. 19, 1949] No. 32513/49. Class 38 (v). A switch for making and breaking a circuit, e.g. that of a radar beacon, a number of times at predetermined intervals, comprises a fixed, conducting cylinder 14 having a number of holes 19 into which contact pins 20 may be placed in any desired arrangement, corresponding for example to a group of morse code letters. The cylinder 14 is fixed to an insulating plate 11 which is fixed to a metal mounting plate 10, carrying an electric motor 12 driving a shaft 22 over gearing 13, 23. Mounted on the shaft is a disc 25 comprising an insulating plate 26 having conducting parts 27, 28 recessed into its opposite faces. The part 27 has a hub 29 surrounding the shaft and a contact 30 which is wide enough to engage pins in two adjacent holes simultaneously, so that there is continuous connection between the member 30 and base 14 while the member 30 is passing over pins in adjacent holes, the connection being broken when it passes over unoccupied holes. The motor is started by a relay energized by an impulse from an electronic control circuit, the motor circuit being maintained over contact springs 45, 46, which bear on the upper conducting part 28. The latter has a radial slot 31 which comes into register with contact 46 to stop the motor after one revolution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3251349A GB673920A (en) | 1949-12-19 | 1949-12-19 | Improvements in or relating to electric make and break switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3251349A GB673920A (en) | 1949-12-19 | 1949-12-19 | Improvements in or relating to electric make and break switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB673920A true GB673920A (en) | 1952-06-11 |
Family
ID=10339746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3251349A Expired GB673920A (en) | 1949-12-19 | 1949-12-19 | Improvements in or relating to electric make and break switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB673920A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2766338A (en) * | 1954-05-11 | 1956-10-09 | William F Jamieson | Dwell rotor for a distributor |
-
1949
- 1949-12-19 GB GB3251349A patent/GB673920A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2766338A (en) * | 1954-05-11 | 1956-10-09 | William F Jamieson | Dwell rotor for a distributor |
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