Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Motor-reversing
Patent
1988-12-16
1990-06-12
Ro, Bentsu
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Motor-reversing
318102, 318266, H02P 158
Patent
active
049336134
ABSTRACT:
A control for a window operator is operable to control incremental movement of a window. The control includes means for developing a command to selectively move the window in a direction to an open or closed position, and means for determining when a plurality of motor drives have moved the window a preselected incremental distance. Means are coupled to the developing means and the determining means for energizing each of the motor drives if a command is developed, until the motor drives have moved the window the preselected incremental distance and thereafter deenergizing the motor drives until another command is received to move the window a subsequent incremental distance in the selected direction.
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patent: 4289997 (1981-09-01), Jung et al.
patent: 4341983 (1982-07-01), Gottliebson
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patent: 4825133 (1989-04-01), Tanuma et al.
patent: 4827195 (1989-05-01), Newell et al.
Berner John M.
Roman Thomas A.
Ro Bentsu
Truth Incorporated
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