Electricity: motive power systems – Positional servo systems
Patent
1987-10-22
1989-07-11
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
318467, 318468, 340310R, E05F 1510
Patent
active
048475424
ABSTRACT:
The present invention is an automatic garage door operator with a two button portable controller enabling a secure mode and control of a load remote from the door operator. In accordance with the normal operation of the secure button, actuation when the garage door is closed toggles a secure mode between secure and non-secure states. In the secure state the automatic gargage door operator does not move the door upon receipt of a door signal. To open the door when in the secure state the operator must first press the secure button to enter the non-secure state and then press the door button to open the door. The secure button has a secondary function when the garage door is open and the secure state is prohibited. Actuation of the secure botton when the door is open toggles the state of a load remote from the automatic garage door operator between an on state and an off state. This control is achieved via a signal modulated on the electric power main.
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Clark John
Martel Brian J.
Murray James S.
Multi-Elmac Corporation
Ro Bentsu
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