Patent US3617843A successfully refreshed from Google Patents.
US3617843A
Expired / Lapsed
US
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Slow-motion control for paper-cutting machines
Assignee: H Wohlenberg GmbH and Co KG
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Filing: 1969-09-22
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Granted: 1971-11-02
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Expires: 1989-09-22
Abstract
Abstract Resistor-capacitor timing control circuits are provided to start the back gauge of a guillotine type paper-cutting machine at fast speed following each cut unless a slow speed is specifically required.
Inventors
- 👤 Helmut Neumann
- 👤 Artur Guse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:35
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
In a speed control system for a cutting machine for paper or the like having a drive motor with a machine part, a pair of spaced signal-sensing elements responsive to signals on a relatively moving recording member synchronized with movement of said machine part by said motor, and also having means to control said motor to effect a slow speed of said machine part when a first signal reaches one sensing element and to effect stopping of said machine part when a second signal reaches the other of said pair of said sensing elements, the improvement comprising: a control element means operative to effect resumption of motion of said machine part at fast speed subsequent to stopping thereof, said control element means including at least one capacitive time constant network for switching a transistor into the circuit of a first relay subsequent to said machine part stopping, which responds to energize a high-speed portion of said drive motor, a second capacitive time constant network coupled in parallel with said first time constant network, to speed up the point at which switching of said transistor occurs.
Claim 2
Dependent Claim
185 words
In a speed control system for a cutting machine for paper or the like having a drive motor with a machine part, a pair of spaced signal-sensing elements responsive to signals on a relatively moving recording member synchronized with movement of said machine part by said motor, and also having means to control said motor to effect a slow speed of said machine part when a first signal reaches one sensing element and to effect stopping of said machine part when a second signal reaches the other of said pair of said sensing elements, the improvement comprising: a control element means operative to effect resumption of motion of said machine part at fast speed subsequent to stopping thereof, said control element means including at least one capacitive time constant network for switching a transistor into the circuit of a first relay subsequent to said machine part stopping, which responds to energize a high-speed portion of said drive motor, a second capacitive time constant network coupled in parallel with said first time constant network, to speed up the point at which switching of said transistor occurs.
Claim 3
Dependent Claim
193 words
In a speed control system for a cutting machine for paper or the like having a drive motor with a machine part, a pair of spaced signal-sensing elements responsive to signals on a relatively moving recording member synchronized with movement of said machine part by said motor, and also having means to control said motor to effect a slow speed of said machine part when a first signal reaches one sensing element and to effect stopping of said machine part when a second signal reaches the other of said pair of said sensing elements, the improvement comprising: a control element means operative to effect resumption of motion of said machine part at fast speed subsequent to stopping thereof, said control element means including at least one capacitive time constant network for switching a transistor into the circuit of a first relay subsequent to said machine part stopping, which responds to energize a high-speed portion of said drive motor, a second capacitive time constant network for developing a charge to enhance the switching of said transistor, to provide a bias voltage for said transistor to supplement that provided by said first time constant network.
Claim 4
Dependent Claim
193 words
In a speed control system for a cutting machine for paper or the like having a drive motor with a machine part, a pair of spaced signal-sensing elements responsive to signals on a relatively moving recording member synchronized with movement of said machine part by said motor, and also having means to control said motor to effect a slow speed of said machine part when a first signal reaches one sensing element and to effect stopping of said machine part when a second signal reaches the other of said pair of said sensing elements, the improvement comprising: a control element means operative to effect resumption of motion of said machine part at fast speed subsequent to stopping thereof, said control element means including at least one capacitive time constant network for switching a transistor into the circuit of a first relay subsequent to said machine part stopping, which responds to energize a high-speed portion of said drive motor, a second capacitive time constant network for developing a charge to enhance the switching of said transistor, to provide a bias voltage for said transistor to supplement that provided by said first time constant network.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |