US3895211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic welding apparatus
Assignee: Individual
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Filing: 1973-12-20
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Granted: 1975-07-15
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Expires: 1993-12-20
Abstract
Abstract An electrostatic welding apparatus is disclosed including a discharge circuit made in the form of a series network and including a battery of operating capacitors, a welding transformer, a controllable discharge switch connected to its control unit and to a power mains through a contactless switch, and a rectifier device having a descending outer characteristic. The said control unit comprises devices for setting a voltage level of said battery of operating capacitors including at least two voltage dividers which are connected in parallel to said battery of operating capacitors. In this case the controllable discharge switch is connected in parallel to the output of said rectifier, thereby providing for simultaneous discharge of the battery of operating capacitors through said welding transformer and disconnection of said battery from said rectifier.
Inventors
- 👤 Igor Vladimirovich Pentegov
- 👤 Evgeny Petrovich Stemkovsky
- 👤 Sergei Nikolaevich Mescheryak
- 👤 Dmitry Alexeevich Sheikovsky
- 👤 David Solomonovich Vorona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:13
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
An electrostatic welding apparatus comprising a transformer, a triac, a current limiter and a rectifier; the primary winding of said transformer connected through the triac to an A.C. mains, and the secondary winding of said transformer connected through said current limiter to said rectifier; a controllable discharge switch having a control electrode, a welding transformer, a battery of capacitors and a diode; the anode of said discharge switch connected to the positive terminal of said rectifier and to the anode of said diode and to one of the outputs of the primary winding of the welding transformer, the secondary winding of said welding transformer connected to the workpieces being welded, the cathode of said controllable discharge switch connected to the negative terminal of said rectifier and to one of the outputs of said battery of capacitors, the other output thereof connected to the cathode of said diode and to the other end of the primary winding of the welding transformer; a control unit and a supply source, the control electrode of said controllable discharge switch connected to the output of the control unit which includes at least two trigger circuits comprising dinistor means for stepwise increasing the voltage in the battery of capactiors.
Claim 2
Dependent Claim
203 words
An electrostatic welding apparatus comprising a transformer, a triac, a current limiter and a rectifier; the primary winding of said transformer connected through the triac to an A.C. mains, and the secondary winding of said transformer connected through said current limiter to said rectifier; a controllable discharge switch having a control electrode, a welding transformer, a battery of capacitors and a diode; the anode of said discharge switch connected to the positive terminal of said rectifier and to the anode of said diode and to one of the outputs of the primary winding of the welding transformer, the secondary winding of said welding transformer connected to the workpieces being welded, the cathode of said controllable discharge switch connected to the negative terminal of said rectifier and to one of the outputs of said battery of capacitors, the other output thereof connected to the cathode of said diode and to the other end of the primary winding of the welding transformer; a control unit and a supply source, the control electrode of said controllable discharge switch connected to the output of the control unit which includes at least two trigger circuits comprising dinistor means for stepwise increasing the voltage in the battery of capactiors.
Claim 3
Dependent Claim
111 words
The apparatus as claimed in claim 1, wherein each of said at least two trigger circuits include means for setting a voltage level of said battery of capacitors which means comprise resistor voltage dividers, the inputs of said voltage dividers connected in parallel to said battery of capacitors, while the output of each of said voltage dividers is connected to a respective input of said trigger circuit, the output of one trigger circuit connected directly to the control electrode of the controllable discharge switch, and the output of each remaining trigger circuit fed through a series-connected capacitor and diode to the cathode of said controllable discharge switch through a respective resistor.
Claim 4
Dependent Claim
64 words
The apparatus as claimed in claim 2 wherein said trigger circuit comprises a series-connected capacitor and two diodes oppositely poled through their cathodes, the junction point of said capacitor and the diode connected thereto connected through a resistor to the positive terminal of said supply source of the control unit, the other output of the capacitor connected to the negative terminal of said source.
References Cited (Backward Citations)
SU204458A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |