US3586943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch oscillating system
Assignee: L-Tec Co
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Filing: 1968-09-18
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Granted: 1971-06-22
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Expires: 1988-09-18
Abstract
Abstract A solid-state torch oscillating system for controllably reciprocating the torch about an adjustable reference position in a direction transverse to the direction of welding. The system includes a bridge network which provides a differential pulse output signal, the polarity of which is synchronized to the motor rotation for controlling the direction of a continuous sequence of drive pulses being applied to the motor and means responsive to the distance traversed by the torch for reversing the polarity of the bridge output signal.
Inventors
- 👤 Raymond Joseph Gonzalez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
An electronic welding torch oscillator control system comprising: a. a motor for driving a torch; b. means connected between said motor and said torch for reciprocating said torch along a rectilinear path in response to the direction of rotation of said motor; c. a bridge circuit having a first and second arm connected in parallel to a source of DC potential, said first arm having a predetermined impedance and providing a first DC output signal of predetermined amplitude and polarity, said second arm having a predetermined impedance and providing a second DC output signal of predetermined amplitude and polarity; d. means coupled to said first arm for varying the impedance thereof in response to the movement of said torch thereby varying said first DC output signal; e. a difference amplifier for comparing said first and second DC output signals and an output lead for providing a third output signal representing the difference between said compared first and second output signals; f. means coupled to said second arm and to said third output signal for reversing the polarity of said second DC output signal when the magnitude of said third output signal is essentially zero; and g. means responsive to the polarity of said third output signal for rotating said motor in a direction dependent upon the sense of such polarity.
Claim 2
Dependent Claim
220 words
An electronic welding torch oscillator control system comprising: a. a motor for driving a torch; b. means connected between said motor and said torch for reciprocating said torch along a rectilinear path in response to the direction of rotation of said motor; c. a bridge circuit having a first and second arm connected in parallel to a source of DC potential, said first arm having a predetermined impedance and providing a first DC output signal of predetermined amplitude and polarity, said second arm having a predetermined impedance and providing a second DC output signal of predetermined amplitude and polarity; d. means coupled to said first arm for varying the impedance thereof in response to the movement of said torch thereby varying said first DC output signal; e. a difference amplifier for comparing said first and second DC output signals and an output lead for providing a third output signal representing the difference between said compared first and second output signals; f. means coupled to said second arm and to said third output signal for reversing the polarity of said second DC output signal when the magnitude of said third output signal is essentially zero; and g. means responsive to the polarity of said third output signal for rotating said motor in a direction dependent upon the sense of such polarity.
Claim 3
Dependent Claim
19 words
An electronic welding torch oscillator control system as defined in claim 1 wherein said motor is a stepping motor.
Claim 4
Dependent Claim
92 words
An electronic welding torch oscillator control system as defined in claim 2 wherein said means for rotating said stepping motor comprises: a. means for generating a continuous series of unidirectional drive pulses; b. first gate means responsive to one polarity of said third output signal for directing said drive pulses to said motor for rotating said motor in a clockwise direction; and c. second gate means responsive to the opposite polarity of said third output signal for directing said drive pulses to said motor for rotating said motor in a counterclockwise direction.
Claim 5
Dependent Claim
111 words
An electronic welding torch oscillator control system as defined in claim 3 further comprising; first delay means coupled between said output lead of said differential amplifier and said drive pulse generator means for inactivating said pulse generation means for a first predetermined period of time in response to a positive to negative reversal in the output polarity of said third output signal, and second delay means coupled between said output lead of said differential amplifier and said drive pulse generator means for inactivating said pulse generator means for a second predetermined period of time in response to a negative to positive reversal in the output polarity of said third output signal.
Claim 6
Dependent Claim
38 words
An electronic welding torch oscillator control system as defined in claim 4 wherein said means coupled to said first arm for varying the impedance thereof is a variable potential having a wiper arm mechanically coupled to said motor.
Claim 7
Dependent Claim
50 words
An electronic welding torch oscillator control system as defined in claim 5 wherein said second arm of said bridge circuit includes a variable potentiometer and a switching transistor and wherein the switching mode of said switching transistor iS reversed when the magnitude of said third output signal is essentially zero.
Claim 8
Dependent Claim
39 words
An electronic welding torch oscillator control system as defined in claim 5 wherein said drive pulse generator means is a relaxation type oscillator which includes a speed adjustment control for varying the number of pulses produced per unit time.
Claim 9
Dependent Claim
76 words
An electronic welding torch oscillator control system as defined by claim 3 wherein said output lead of said differential amplifier is connected to a linear amplifier for providing a constant amplifier output signal in response to a predetermined magnitude of said third output signal and wherein said first and second gate means are AND gates which receive said constant amplitude output as one input thereto and which receive said drive pulses as a second input thereto.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |