Displacement control device

Details Displacement control device Displacement control device

2005-12-06

2005-12-06

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

C251S129150

Reexamination Certificate

active

06972653

ABSTRACT:
A displacement control device (1) is adapted to move a member (23) relative to a body (7). The displacement control device includes a drive means (2, 3) and an emergency actuator(8) arranged mechanically in series with the member. The actuator includes a housing (16) and a spring (14) arranged to act between the housing and the member. The improvement comprises: the actuator including a toggle linkage (9) acting between the housing and the spring, the toggle linkage having two pivotally-connected links (10, 11) that are adapted to be selectively moved between a collapsed position at which the links are arranged at an acute included angle, and an extended position at which the links are arranged at an obtuse included angle slightly less than 180°. The toggle linkage is arranged such that the spring will be more greatly compressed when the links are in the extended position than when the links are in the collapsed position. The toggle linkage is arranged to be held in the extended position by a magnetically-actuated latching pin.

REFERENCES:
patent: 1692770 (1928-11-01), Eggleston
patent: 3512549 (1970-05-01), Wiegand
patent: 4205820 (1980-06-01), Bray
patent: 4489756 (1984-12-01), Balz
patent: 4899639 (1990-02-01), Seebacher
patent: 15 00 307 (1969-11-01), None
patent: 20 25 300 (1971-12-01), None
patent: 1592467 (1981-07-01), None
patent: WO 02 35123 (2002-05-01), None

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