Patent US4253042A successfully refreshed from Google Patents.
US4253042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current lampchanger control circuit
Assignee: Tideland Signal Corp
•
Filing: 1979-07-30
•
Granted: 1981-02-24
•
Expires: 1999-07-30
Abstract
Abstract An alternating current lampchanger control circuit for driving a rotatable turret having a plurality of lamps, such as used in a navigational light. An input receives pulsed alternating current signals and is connected to a power circuit including fixed contacts for supplying the pulsed signals to one of the lamps in the turret. A lampout sensing circuit includes a transformer which has a primary in the lamp power circuit and has a rectifier connected to the transformer secondary. Switching means are connected to the rectifier and are actuated to an on position by a lamp failure. An alternating current turret motor is connected to the input or to a continuous source of alternating electrical current through the switching means for rotating the turret upon a lamp failure. The switching means may include a first triac controlling a second triac connected to the motor. Third switching means are included in a feedback loop to provide an alternating current drive for the motor in a continuous mode. A capacitor is connected to and actuated by a current flow to the motor with a fourth switch connected between the capacitor and the first switch which is actuated when a new lamp is rotated into position whereby the charged capacitor turns the power to the motor off. A fifth switch is connected in the motor circuit to stop the motor when all the lamps burn out. A test switch is connected between the lampout sensing circuit and ground causing the motor to run for testing. A peak suppression circuit prevents unwanted actuation of the switches.
Inventors
- 👤 Thomas A. Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:50
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/10; H05B39/105
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a signal input for receiving pulsed alternating current signals, a lamp power circuit connected to the signal input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected in said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, and direct current switching controlled means connected to the rectifier means and controlled by a lamp failure, and an alternating current turret motor adapted to be connected to an alternating current source through the switching means for rotating the turret in response to actuation of the switching means upon a lamp failure.
Claim 2
Dependent Claim
137 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a signal input for receiving pulsed alternating current signals, a lamp power circuit connected to the signal input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected in said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, and direct current switching controlled means connected to the rectifier means and controlled by a lamp failure, and an alternating current turret motor adapted to be connected to an alternating current source through the switching means for rotating the turret in response to actuation of the switching means upon a lamp failure.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein the turret motor is connected to the signal input.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 wherein the turret motor is connected to a source of continuous alternating current for rapidly rotating the turret.
Claim 5
Dependent Claim
48 words
The apparatus of claim 1 wherein the direct current controlled switching means includes a first triac connected to and controlled by the output from the rectifier, and a second triac connected to and controlled by the first triac and controlling the application of alternating current to the motor.
Claim 6
Dependent Claim
159 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a signal input for receiving pulsed alternating current signals, a lamp power circuit connected to the signal input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected to said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, and direct current controlled switching means including a first triac connected to and controlled by the output from the rectifier and a second triac connected to the first triac and to the signal input and controlled by the first triac, and an alternating current turret motor connected to the signal input through the second triac for rotating the turret in response to the actuation of the direct current switching means upon a lamp failure.
Claim 7
Dependent Claim
159 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a signal input for receiving pulsed alternating current signals, a lamp power circuit connected to the signal input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected to said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, and direct current controlled switching means including a first triac connected to and controlled by the output from the rectifier and a second triac connected to the first triac and to the signal input and controlled by the first triac, and an alternating current turret motor connected to the signal input through the second triac for rotating the turret in response to the actuation of the direct current switching means upon a lamp failure.
Claim 8
Dependent Claim
200 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a first input for receiving pulsed alternating current signals, a second input for receiving continuous alternating current, a lamp power circuit connected to the first input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected in said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, a direct current controlled switching means connected to the rectifier means and actuated by a lamp failure, a second switching means connected to the direct current switching means and the first input and actuated by the direct current switching means, an alternating current turret motor connected to the second input through the second switching means for rotating the turret in response to a lamp failure, a feedback circuit including, third switching means connected to and actuated by current flow through the motor and connected to the second input to supply continuous alternating current between the second input and the second switching means for continuously actuating the motor.
Claim 9
Dependent Claim
200 words
A lampchanger control circuit for driving a rotatable turret having a plurality of lamps comprising, a first input for receiving pulsed alternating current signals, a second input for receiving continuous alternating current, a lamp power circuit connected to the first input and including power contacts for supplying power to one of the lamps in the turret, a lampout sensing circuit including a transformer having a primary and secondary with the primary connected in said lamp power circuit, rectifier means connected to the secondary for converting current passing through a lamp to direct current, a direct current controlled switching means connected to the rectifier means and actuated by a lamp failure, a second switching means connected to the direct current switching means and the first input and actuated by the direct current switching means, an alternating current turret motor connected to the second input through the second switching means for rotating the turret in response to a lamp failure, a feedback circuit including, third switching means connected to and actuated by current flow through the motor and connected to the second input to supply continuous alternating current between the second input and the second switching means for continuously actuating the motor.
Claim 10
Dependent Claim
64 words
The apparatus of claim 6 including, a capacitor connected to and actuated by current flow through the motor, a fourth switch connected between the capacitor and the first switching means, said fourth switch actuated when a new lamp is rotated into position with the power contacts whereby the charged capacitor switches the first and second switches to turn the power off to the motor.
Claim 11
Dependent Claim
38 words
The apparatus of claim 7 including, a fifth switch connected in the motor circuit and actuated when all of the lamps have been rotated out of contact with the power contacts for stopping further actuation of the motor.
Claim 12
Dependent Claim
33 words
The apparatus of claim 6 including, a test switch connected between the lampout sensing circuit and ground for causing the motor to run when the test switch is actuated to the closed position.
Claim 13
Dependent Claim
18 words
The apparatus of claim 6 wherein the direct current switching means, second, and third switching means are triacs.
Claim 14
Dependent Claim
44 words
The apparatus of claim 6 wherein the feedback circuit includes a bilateral switch connected to the third switching means for preventing actuation of the third switching means by random noise spikes and a capacitor connected to the bilateral switch for turning the switch on.
Claim 15
Dependent Claim
37 words
The apparatus of claim 6 including a voltage peak suppression circuit connected to the second input including a sixth switch and an RC circuit for actuating the sixth switch by predetermined voltage peaks on the second input.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |