Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Retarded or delayed type
Patent
1973-07-26
1976-03-16
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Retarded or delayed type
335200, 335240, H01h 703
Patent
active
039449556
ABSTRACT:
A solenoid switch, particularly but not exclusively for use in a starter motor supply circuit includes a solenoid coil and at least one fixed contact. An armature is movable relative to the coil in response to energisation of the coil and carries a movable contact. The movable contact is urged by resilient means to a rest position relative to the armature and a member is coupled to the armature through said resilient means for movement with the armature in a direction to engage the movable contact with the fixed contact. The switch further includes a delay unit for slowing movement of the member in the contact engaging direction, the arrangement being such that in use when the movable contact engages the fixed contact the armature moves relative to the member and the movable contact compressing said resilient means and thereby increasing the pressure between the contacts.
REFERENCES:
patent: 1604669 (1926-10-01), Valkenburg
patent: 2397219 (1946-03-01), Taliaferro
patent: 2627919 (1953-02-01), Lindahl
patent: 3209180 (1965-09-01), Doyle
patent: 3411117 (1968-11-01), Jencks et al.
patent: 3711797 (1973-01-01), Flanagan
Broome Harold
Lucas Electrical Company Limited
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