US4821024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operator pre-warning system
Assignee: Individual
•
Filing: 1987-08-03
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Granted: 1989-04-11
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Expires: 2007-08-03
Abstract
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.
Inventors
- 👤 Allan T. Bayha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:03
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; E; E05; E05F; E05F15/00; E05F15/40; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/70; E05F15/79; E05Y; E05Y2400/00; E05Y2400/80; E05Y2400/81; E05Y2400/812; E05Y2400/814; E05Y2400/818; E05Y2400/822; E05Y2400/83; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
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.
Claim 2
Dependent Claim
190 words
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.
Claim 3
Dependent Claim
222 words
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.
Claim 4
Dependent Claim
222 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |