Patent
1977-07-14
1980-06-10
Gellner, Michael L.
354264, G03B 700, G03B 922
Patent
active
042069920
ABSTRACT:
Electromagnetically operated camera shutter includes a pivotally mounted shutter blade actuating ring having a radially directed arm and driven from closed position to open, an electromagnet having an electromagnetically responsive external anchor and mounted for movement from a remote to a proximate position with respect to the electromagnet in response to energization of the electromagnet and disposed to provide a closable gap, and an actuator arm directly interconnecting the anchor with the ring and movable for driving the ring from closed to open position, and with a cylindrical housing arranged to provide an annular space between itself and the ring for disposing the electromagnet and anchor, and with the arm in the form of a curvo-linear actuator arm fixedly carried on the anchor and arranged in the space for acting against the radially directed arm at a displaceable point, and particularly with such actuator arm being of similar curvature to that of the space and sized to permit unhindered movement within the space for driving the ring by impingement against the radially directed arm. The point of engagement between the actuating arm and radially directed arm is constantly displaced in the direction of the ideal pivot axis of the ring in dependence upon the pivotal movement of the anchor to close the gap. It further includes a return spring disposed for driving the ring from open to closed position upon deenergization of the electromagnet.
REFERENCES:
patent: 3455218 (1969-07-01), Eagle et al.
patent: 3466993 (1969-06-01), Fahlerberg et al.
patent: 3492931 (1970-02-01), Racki
patent: 3498194 (1970-03-01), Bellows
patent: 3559547 (1971-02-01), Rentschler
patent: 3696726 (1972-10-01), Lewis
Rittmann Dieter
Theurer Richard
Gellner Michael L.
March Arthur A.
Prontor-Werk Alfred Gauthier GmbH
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