Patent US3644699A successfully refreshed from Google Patents.
US3644699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser spot-welding machine
Assignee: Individual
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Filing: 1969-09-12
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Granted: 1972-02-22
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Expires: 1989-09-12
Abstract
Abstract A condenser spot-welding machine, comprising: a rectifier unit to charge an operating capacitor bank; two gates one of which ensures the discharge of the capacitor bank, the other one connecting the capacitor bank for charging; a control unit wherein serving as the input is a voltage level setter connected in parallel with the operating capacitor bank, the output being an actuating unit acting on said gates, while said voltage level setter in the control unit consists of at least two voltage dividers to whose outputs there are coupled shaping capacitors alternately connected to the control unit circuits shaping the control pulses.
Inventors
- 👤 Sergei Nikolaevich Mescheryak
- 👤 Evgeny Petrovich Stemkovsky
- 👤 Igor Vladimirovich Pentegov
- 👤 David Semenovich Vorona
- 👤 Vladislav Eduardovich Moravsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:09
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A condenser spot-welding machine, comprising; a rectifier unit for charging a capacitor bank; a welding transformer; two gates, one of said gates being connected to said capacitor bank for charging and the other said gate effecting the discharge of said capacitor bank through said welding transformer; a control unit for maintaining at least a two-pulse welding cycle in which the amplitude of each current pulse exceeds that of the preceding pulse, said control unit including a voltage level setter comprising at least two resistor voltage dividers connected in parallel to said capacitor bank, said voltage dividers having lower arms connected in parallel with capacitors, and diodes for shunting said capacitors in a reverse direction.
Claim 2
Dependent Claim
114 words
A condenser spot-welding machine, comprising; a rectifier unit for charging a capacitor bank; a welding transformer; two gates, one of said gates being connected to said capacitor bank for charging and the other said gate effecting the discharge of said capacitor bank through said welding transformer; a control unit for maintaining at least a two-pulse welding cycle in which the amplitude of each current pulse exceeds that of the preceding pulse, said control unit including a voltage level setter comprising at least two resistor voltage dividers connected in parallel to said capacitor bank, said voltage dividers having lower arms connected in parallel with capacitors, and diodes for shunting said capacitors in a reverse direction.
Claim 3
Dependent Claim
137 words
A machine as claimed in claim 1, including circuits connected in parallel to said diode-shunted capacitors, said circuits comprising; dynistors and a pulse transformer, said dynistors being connected in series to the primary windings of said pulse transformer, decoupling diodes connected to the secondary windings of said pulse transformer and in parallel with each other, a thyristor having a control electrode connected to said decoupling diodes, said thyristor adapted to serve as a discharge gate for effecting the discharge of said capacitor bank, said pulse transformer having third windings connected to said voltage dividers for effecting maximum charge of said capacitor bank, and a further thyristor having a control circuit adapted to serve as a charge gate, said third winding being connected to said control circuit and connected in series to the primary winding of said transformer.
Claim 4
Dependent Claim
86 words
A machine as claimed in claim 2, wherein said control circuit of the charge gate comprises the series connection to a voltage source, a current limiting resistor, a reference diode connected in parallel to the third winding of said pulse transformer and shunted by the normally open contacts of a starter pushbutton, a further dynistor having an anode and a cathode, said anode being connected through a resistor and said cathode being connected directly respectively, to the control electrode and the cathode of said charge gate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |