Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1988-06-17
1990-01-09
Shoop, Jr., William M.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361142, 361195, 361210, H01H 4700
Patent
active
048932132
ABSTRACT:
The present invention pertains to a multi-stage solenoid in a housing having a first set of electrical contacts and at least a second set of electrical contacts. The solenoid also has at least two coil windings electrically distinct from each other and disposed sequentially in the housing. Additionally, the solenoid uses a timing circuit separately connected through a first set of contacts to each of the coil windings to control when they each receive electricity thereby activating the corresponding magnetically responsive element. The solenoid also uses a plunger having a flange of an electrically conducting material. The plunger is disposed in an original position in the housing in contact with one of the magnetically responsive elements. When electricity is received by the coil windings associated with that magnetically responsive element, the flange of the plunger moves from its original position and into contact with the second set of electrical contacts such that electricity flows therebetween via the flange. At the same time, a different coil winding and its associated magnetic element can be electrically activated by the timing circuit to cause a mechanical displacement in that magnetic element which causes the activation of another device. Thus, the solenoid of the present invention can cause either only an electrical connection to be formed or a combined electrical connection and mechanical displacement.
REFERENCES:
patent: 723119 (1903-03-01), Zweigbergk
patent: 4276631 (1981-06-01), Fujita et al.
R.P.M. Industries
Shoop Jr. William M.
Williams H. L.
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