based on the expansion or contraction of a material

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CPC
H01H43/301

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Parent Industries

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES H01H43/00Time 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

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H01H43/301based on the expansion or contraction of a material

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Patents Grantslast 30 patents

Information Patent Grant
2402240
- Patent number 2,402,240
- Issue date Jun 18, 1946
- H01 - BASIC ELECTRIC ELEMENTS