Control system for a radio-controlled door operator

• US 4,491,774 A
• Filed: 12/30/1983
• Issued: 01/01/1985
• Est. Priority Date: 12/30/1983
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Schmitz, Charles J.
• Primary Examiner(s): Shoop, William M.
• Assistant Examiner(s): Ro, Bentsu
• Application Number:
  US06/566,941
• Time in Patent Office: 368 Days
• Field of Search: 318/466, 318/467, 318/468, 318/282
• US Class Current: 318/282
• CPC Class Codes: E05F 15/668 for overhead wings
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: H02P 23/24 Controlling the direction, e.g. clockwise or counterclockwise

Abstract

A radio-controlled door operator system includes a reversible AC motor and lamp. Power is supplied to the motor and lamp by a pair of power control relays each having two single-pole double-throw contacts. Actuation of one relay results in clockwise rotation of the motor and lighting of the lamp. Actuation of the other relay results in counter-clockwise rotation of the motor and lighting of the lamp. Actuation of both relays results in lighting of the lamp only. Three different active operating states are thus established by the two relays.

Claims

1. A door operator control system for use in conjunction with a motor driven door operator and light system including a bidirectional motor and a control unit providing door up, door down and light command signals, comprising:

a first control relay having first and second sets of single-pole double-throw contacts;

a second control relay having first and second sets of single-pole double-throw contacts;

interconnection means connecting said first set of contacts of said first relay with said first set of contacts of said second relay to one direction winding of said motor and to said light, and said second set of contacts of said first relay with said second set of contacts of said second relay to the other direction winding of said motor and to said light, the remaining contacts of said motor and said light being connected to said source, whereby upon actuation of said first relay said motor operates in one direction and said light is powered, upon actuation of said second relay said motor operates in the other direction and said light is powered, and upon actuation of both said relays only said light is powered.

2. A door operator control system as defined in claim 1 including control circuit means for actuating said first and second relays, said control circuit means requiring only three conductors connecting to said relays.

3. A door operator control system as defined in claim 1 wherein said motor includes clockwise and counter-clockwise windings, and said first sets of contacts are connected to said clockwise winding, and said second sets of contacts are connected to said counter-clockwise winding.

4. An electric door actuator comprising:

a reversible motor having first and second opposite direction windings;

a lamp;

a pair of power control relays each having a first contact set comprising a first transfer contact, a first normally open contact, and a first normally closed contact, and a second contact set comprising second transfer contact, a second normally open contact, and a second normally closed contact;

of said relay pair, said first transfer contact of one of said relays being connected to said first normally closed contact of the other relay, said first normally open contact of said one relay being connected to one contact of one winding of said motor, and said first normally open contact of said other relay being conneted to one terminal of said lamp, and said first transfer contact of said other relay being connected to one side of the AC line; and

of said relay pair, the second transfer contact of one of said relays being connected to said one side of the AC line, said second normally open contact of said one relay being connected to said one terminal of said lamp, said second normally closed contact of said one relay being connected to said second transfer contact of said other relay, and said second normally open contact of the other relay being connected to one terminal of the other winding of said motor; and

the remaining terminals of said motor windings and said lamp being connected to the other side of said AC line;

whereby upon actuation of one relay said motor operates in one direction, upon actuation of the other relay said motor operates in the reverse direction, and upon actuation of both relays only said light operates.