Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1980-03-31
1982-04-27
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335254, H01F 708
Patent
active
043273440
ABSTRACT:
A mechanically latchable solenoid having a single coil and a single-piece armature or core plunger having a latch pin fixed thereto. The plunger is moved to a first, retracted position by energization of the coil with a pulse of either direct or alternating electric current. A spring-biased mechanical latch latches the plunger in the retracted position. A subsequent energization of the coil with a current pulse unlatches the plunger so that the plunger is returned to its original, unretracted position by a non-magnetic external force, such as that provided by a plunger spring. The latch is in the form of a lobed cam which is mechanically moved out of its normal unlatched position by the latch pin when the coil is first energized to attract the plunger from its unretracted to its retracted position. When the plunger has moved a predetermined portion of the distance to its retracted position, a lobe of the spring-biased cam engages the pin to prevent the plunger from returning to its original position. However, upon the subsequent energization of the coil, the plunger is again moved toward the retracted position to release the latch pin from the lobe and unlatch the plunger, thereby permitting the plunger to be returned to its original unretracted position when the coil is again de-energized.
REFERENCES:
patent: 2340092 (1944-01-01), Wells
patent: 2370038 (1945-02-01), Iglehart
patent: 2515258 (1950-07-01), O'Brien et al.
patent: 2515259 (1950-07-01), O'Brien et al.
patent: 3307131 (1967-02-01), Hook et al.
patent: 3689857 (1972-09-01), Obszarny
patent: 3735296 (1973-05-01), Obszarny
Harris George
Hi-G Incorporated
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