US3601571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating device with a controlled feeding mechanism
Assignee: Park Ohio Holdings Corp
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Filing: 1969-11-12
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Granted: 1971-08-24
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Expires: 1989-11-12
Abstract
Abstract In an induction heating device including an oscillator with a high frequency output circuit, a multiple turn induction heating coil with an internal workpiece-receiving passageway connected in the output circuit, means for sequentially feeding workpieces through the passageway and control means for actuating the feeding means, there is provided an energizable means for actuating the control means only when high frequency current is flowing in the output circuit of the oscillator whereby the feeding means is operable only when heating current is flowing in the coil.
Inventors
- 👤 Edmund N Curcio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
In an induction heating device comprising an oscillator with a high frequency output circuit, a multiple turn induction heating coil with an internal workpiece-receiving passageway connected in said output circuit, means for feeding workpieces through said passageway, and control means for activating said feeding means, the improvement comprising: energizable means for activating said control means of said feed means only when said control means is in a selected condition, and a light source responsive to high frequency current flow in said output circuit of said oscillator for causing said energizable means to be in said condition only when said current flow is present in said output circuit.
Claim 2
Dependent Claim
107 words
In an induction heating device comprising an oscillator with a high frequency output circuit, a multiple turn induction heating coil with an internal workpiece-receiving passageway connected in said output circuit, means for feeding workpieces through said passageway, and control means for activating said feeding means, the improvement comprising: energizable means for activating said control means of said feed means only when said control means is in a selected condition, and a light source responsive to high frequency current flow in said output circuit of said oscillator for causing said energizable means to be in said condition only when said current flow is present in said output circuit.
Claim 3
Dependent Claim
60 words
The improvement as defined in claim 1 wherein said energizable means includes a circuit with a light-responsive element, a power source, a switch-actuating electrical component and a switch means for operating said control means when said switch means is actuated and said light-responsive element being positioned adjacent said light source for actuation thereby so that said switch means is activated.
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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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |