GB707288A - Improvements in electrical switching devices for effecting timed operation - Google Patents
Improvements in electrical switching devices for effecting timed operationInfo
- Publication number
- GB707288A GB707288A GB159253A GB159253A GB707288A GB 707288 A GB707288 A GB 707288A GB 159253 A GB159253 A GB 159253A GB 159253 A GB159253 A GB 159253A GB 707288 A GB707288 A GB 707288A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switching devices
- electrical switching
- timed operation
- effecting timed
- effecting
- 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
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
- H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
- H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
- H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
Abstract
707,288. Partly electromagnetic switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Aug. 14, 1951 [Aug. 26, 1950], No. 1592/53. Divided out of 707,231. Drawings to Specifications. Class 38(5) The subject-matter of this Specification is included in the Specification 707,231, but the claims differ. Specification 525,840 also is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB159253A GB707288A (en) | 1950-08-26 | 1950-08-26 | Improvements in electrical switching devices for effecting timed operation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB159253A GB707288A (en) | 1950-08-26 | 1950-08-26 | Improvements in electrical switching devices for effecting timed operation |
Publications (1)
Publication Number | Publication Date |
---|---|
GB707288A true GB707288A (en) | 1954-04-14 |
Family
ID=9724621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB159253A Expired GB707288A (en) | 1950-08-26 | 1950-08-26 | Improvements in electrical switching devices for effecting timed operation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB707288A (en) |
-
1950
- 1950-08-26 GB GB159253A patent/GB707288A/en not_active Expired
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