TREA

Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts

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Industry

  • CPC
  • H01H7/00
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Parent Industries

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES

Current Industry

H01H7/00Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts

Sub Industries

H01H7/02with fluid timing means H01H7/03with dash-pots H01H7/04with flies H01H7/06with thermal timing means H01H7/08with timing by mechanical speed-control devices H01H7/10by escapement H01H7/12mechanical H01H7/14electromagnetic H01H7/16Devices for ensuring operation of the switch at a predetermined point in the ac cycle
Industries

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Patents Applicationslast 30 patents