Electricity: circuit makers and breakers – Special application – Control by direction of rotation of shaft or spindle
Patent
1979-07-16
1981-04-07
Valenza, Joseph E.
Electricity: circuit makers and breakers
Special application
Control by direction of rotation of shaft or spindle
200 6142, H01H 312
Patent
active
RE0305707
ABSTRACT:
An endless-conveyor monitoring switch assembly includes an elongated frame having a shaft journaled for rotation therein and extending longitudinally therealong. A drive wheel is attached to and rotatable with the shaft at a first end of the elongated frame and a detecting switch is attached to the shaft at the opposite end of the elongated frame. A seesaw, U-shaped, mounting member is attached to the elongated frame at a point intermediate the drive wheel and the detecting switch for mounting the elongated frame on an endless-conveyor cable support. The mounting member allows the weight of the elongated frame and its attachments to pivot the frame in a seesaw manner to bring the drive wheel into contact with the endless conveyor. The detecting switch includes a conductive disc mounted on the shaft adjacent to a pendulum having permanent magnets and mercury switches mounted thereon. When the shaft rotates the disc above a predetermined speed, the permanent magnets on the pendulum cooperate with eddy currents in the disc to pivot the pendulum and thereby actuate the mercury switches.
REFERENCES:
patent: 433549 (1890-08-01), Soule
patent: 1973312 (1934-09-01), Hardinge
patent: 2510163 (1950-06-01), Wood
patent: 2589220 (1952-03-01), Buckeridge
patent: 2647966 (1953-08-01), Tornberg
patent: 2928914 (1960-03-01), Gruber
patent: 2951576 (1960-09-01), Buckeridge
patent: 3139217 (1964-06-01), Mell
patent: 3301974 (1967-01-01), Hancock
patent: 3487181 (1969-12-01), Bourgault et al.
MEFCOR, Inc.
Valenza Joseph E.
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