Electricity: motive power systems – Impact – mechanical shock – or vibration-producing motors
Patent
1980-03-07
1983-01-18
Dobeck, B.
Electricity: motive power systems
Impact, mechanical shock, or vibration-producing motors
318128, 198751, 340683, H02K 3300
Patent
active
043693989
ABSTRACT:
An apparatus and method for detecting overstroke, understroke and/or overspeed, underspeed conditions in vibratory equipment includes a vibratory member mounted on the equipment to vibrate therewith and to operate solid-state switches over a large number of cycles. The preferred switches are Hall effect switches operable by a magnet carried by the vibratory member. During normal vibratory motion, a normal stroke Hall effect switch resets a timing means which will operate as a missing pulse detector and will generate an abnormal pulse if it is not reset during a predetermined period of time. If the amplitude is too large, the overstroke Hall effect switch is operated and causes an abnormal condition pulse. A control circuit means is operable by an abnormal pulse to generate an alarm and/or shut down the vibrating equipment. An initial start-up means operates for an initial predetermined time period to inhibit said control circuit from shutting down or alarming due to a transient vibratory condition during the start-up of the equipment.
REFERENCES:
patent: 2935672 (1960-05-01), Ross
patent: 3504250 (1970-03-01), Stevens, Jr. et al.
patent: 3594621 (1971-07-01), Stechman
patent: 4216416 (1980-08-01), Grace
Dobeck B.
Triple/S Dynamics Inc.
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