Mechanisms for operating contacts

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES

H01H3/00Mechanisms for operating contacts

H01H3/001Means for preventing or breaking contact-welding H01H3/004for operating contacts periodically H01H3/005making use of superconductivity H01H3/02Operating parts H01H3/0206Combined operation of electric switch and of fluid control device H01H3/0213Combined operation of electric switch and variable impedance H01H3/022Emergency operating parts H01H3/0226operated by a pull cord H01H3/0253two co-operating contacts actuated independently H01H3/04Levers H01H3/06Means for securing to shaft of driving mechanism H01H3/08Turn knobs H01H3/10Means for securing to shaft of driving mechanism H01H3/12Push-buttons H01H3/122with enlarged actuating area H01H3/125using a scissor mechanism as stabiliser H01H3/14adapted for operation by a part of the human body other than the hand H01H3/141Cushion or mat switches H01H3/142of the elongated strip type H01H3/16adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch H01H3/161for actuation by moving a closing member H01H3/162associated with a hinge of the closing member H01H3/163associated with locking or manipulating means of the closing member H01H3/166Self-adjusting mountings, transmissions and the like H01H3/168operated by movement in any direction H01H3/18the movement in one direction being intentionally by hand H01H3/20wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective H01H3/22Power arrangements internal to the switch for operating the driving mechanism H01H3/222using electrodynamic repulsion H01H3/227Interlocked hand- and power-operating mechanisms H01H3/24using pneumatic or hydraulic actuator H01H3/26using dynamo-electric motor H01H3/262using a centrifugal mechanism H01H3/264using a travelling nut mechanism H01H3/28using electromagnet H01H3/30using spring motor H01H3/3005Charging means H01H3/301using a fluid actuator H01H3/3015using cam devices H01H3/3021using unidirectional coupling H01H3/3026in which the closing spring charges the opening spring or vice versa H01H3/3031Means for locking the spring in a charged state H01H3/3042using a torsion spring H01H3/3047adapted for operation of a three-position switch H01H3/3052Linear spring motors H01H3/32Driving mechanisms H01H3/34using ratchet H01H3/36using belt, chain, or cord H01H3/38using spring or other flexible shaft coupling H01H3/40using friction, toothed, or screw-and-nut gearing H01H3/42using cam or eccentric H01H3/44using Geneva movement H01H3/46using rod or lever linkage H01H3/48using lost-motion device H01H3/50with indexing or locating means H01H3/503making use of electromagnets H01H3/52with means to ensure stopping at intermediate operative positions H01H3/54Mechanisms for coupling or uncoupling operating part, driving mechanism or contacts H01H3/56using electromagnetic clutch H01H3/58using friction, toothed, or other mechanical clutch H01H3/60Mechanical arrangements for preventing or damping vibration or shock H01H3/605making use of a fluid damper H01H3/62Lubricating means structurally associated with the switch