Door operator pre-warning system

• US 4,821,024 A
• Filed: 08/03/1987
• Issued: 04/11/1989
• Est. Priority Date: 08/03/1987
• Status: Expired due to Term

• Current Assignee: Allan T. Bayha
• Original Assignee: Allan T. Bayha
• Inventors: Bayha, Allan T.
• Primary Examiner(s): Swann, III, Glen R.
• Application Number:
  US07/080,434
• Time in Patent Office: 617 Days
• Field of Search: 340/540, 340/545, 340/679, 340/825.36, 340/309.15, 340/527, 340/528, 49/30, 49/58, 49/506, 49/507
• US Class Current: 340/309.8
• CPC Class Codes: E05F 15/00 Power-operated mechanisms for wings motor-operated accessories in locks for completing closing or initiating opening of a wing E05B17/00
• CPC Class Codes: E05F 15/40 Safety devices, e.g. detection of obstructions or end positions
• CPC Class Codes: E05F 15/668 for overhead wings
• CPC Class Codes: E05F 15/79 using time control
• CPC Class Codes: E05Y 2400/59 Travel display
• CPC Class Codes: E05Y 2400/814 Sound emitters, e.g. speakers
• CPC Class Codes: E05Y 2400/822 Light emitters, e.g. LEDs
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: G08B 21/02 Alarms for ensuring the safety of persons

Abstract

An advance warning system for an automatic electric door operator in which a command signal originating from a remotely located hand held radio transmitter or a wall switch located within the garage is received and processed by a signal receiver and transmitted to a signal delay unit. Upon receipt of the command signal, the delay unit activates a warning light and warning horn to alert persons in the vicinity of the door or operator mechanism that the operator is about to be activated. After a predetermined delay period, the delay unit also generates an operating signal which activates the operator.

Claims

1. An automatic electric door operator including an advance warning system, the door operator comprising:

a door operator assembly for moving an overhead door between an open and a closed position, said assembly including electrically operated power means responsive to an operating signal;

means responsive to a remotely generated command signal for producing the operating signal delayed from the command signal by a predetermined period of time including (i) a first monostable flip-fop means having a predetermined timeout period and being connected to receive the command signal for switching state after the predetermined timeout period as measured from the receipt of the command signal, (ii) a second monostable flip-flop means connected to the first monostable flip-flop means for producing a pulse of predetermined time width in response to a switch in the state of the first monostable flip-flop, and, (iii) a transistor switch means connected to the second monostable flip-flop means for producing the operating signal in response to the pulse of predetermined time width and,

means also responsive to the command signal for emitting a warning a signal to indicate that movement of the door from either position is imminent.

2. An automatic electric door operator including an advance warning system, the door operator comprising:

a door operator assembly for moving an overhead door between an open and a closed position, said assembly including an electric motor responsive to an operating signal and means for interconnecting the door and the motor;

means responsive to a remotely generated electromagnetic command signal for producing the operating signal delayed from the command signal by a predetermined period of time, the means for producing including a time delay unit having;

a first monostable flip-flop means having a predetermined timeout period and being connected to receive the command signal for switching state after the predetermined timeout period as measured from receipt of the command period,

a second monostable flip-flop means connected to the first monostable flip-flop means for producing a pulse of predetermined time width in response to a switch in the state of the first monostable flip-flop, and,

a transistor switch means connected to the second monostable flip-flop means for producing the operating signal in response to the pulse of predetermined time width,

means also responsive to the command signal for emitting a warning signal to indicate that movement of the door from either position is imminent, the warning signal including a warning light and an audible signal; and

,

a portable transmitter for generating the command signal.