Patent US3725911A successfully refreshed from Google Patents.
US3725911A
Expired / Lapsed
US
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Stop motion device with selective indicator
Assignee: BATSON COOK Co
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Filing: 1971-12-15
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Granted: 1973-04-03
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Expires: 1991-12-15
Abstract
Abstract A stop motion system for multi-thread textile machines includes a number of thread slack-detection switches disposed in parallel and each having an indicator lamp and a diode in series with the switch. A voltage source and a stop motion relay are in series with the switches and the voltage source produces a potential through any closed switch and its associated lamp and diode greater than the breakover voltage for the diode. Each diode, however, is a four layer diode so that its sustaining voltage is very much less than its breakover voltage. In this way, the first diode to conduct reduces the potential available across any of the other diodes to the sustaining voltage so that only the first detector circuit activated will be effective to provide an indication of malfunction.
Inventors
- 👤 H Cook
- 👤 H Lanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:21
CPC Classifications
D; D03; D03D; D03D51/00; D03D51/18; D03D51/20; D03D51/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
In a stop motion system for a multi-thread textile machine comprising in combination: a plurality of normally open detector switches connected in parallel between a pair of common junctions, any one of which switches may be closed in response to slack in a thread associated therewith; electrical energy source means for establishing a selected voltage across said common junctions when all of said detector switches are open; a relay in series with said electrical energy source means and said junctions, said relay including switch means for stopping the machine when any of said detector switches is closed; an indicator device in series with each of said detector switches; and diode means in series with each detector switch and associated indicator device for activating the associated indicator device and decreasing said selected voltage across said junctions to a sustaining voltage value when any associated one of said detector switches is closed, each diode means being a multilayer device providing a break over voltage substantially greater than said sustaining voltage but less than said selected value so that only that indicator device associated with the first-closed detector switch is activated.
Claim 2
Dependent Claim
188 words
In a stop motion system for a multi-thread textile machine comprising in combination: a plurality of normally open detector switches connected in parallel between a pair of common junctions, any one of which switches may be closed in response to slack in a thread associated therewith; electrical energy source means for establishing a selected voltage across said common junctions when all of said detector switches are open; a relay in series with said electrical energy source means and said junctions, said relay including switch means for stopping the machine when any of said detector switches is closed; an indicator device in series with each of said detector switches; and diode means in series with each detector switch and associated indicator device for activating the associated indicator device and decreasing said selected voltage across said junctions to a sustaining voltage value when any associated one of said detector switches is closed, each diode means being a multilayer device providing a break over voltage substantially greater than said sustaining voltage but less than said selected value so that only that indicator device associated with the first-closed detector switch is activated.
Claim 3
Dependent Claim
19 words
In a stop motion system as defined in claim 1 wherein each diode means is a four layer diode.
Claim 4
Dependent Claim
18 words
In a stop motion system as defined in claim 2 wherein each indicator device is a light source.
Claim 5
Dependent Claim
61 words
In a stop motion system as defined in claim 1 wherein said relay includes first and second pairs of switch contacts, one for stopping motion of the associated machine and the other for holding the machine in stopped condition, whereby removal of the fault associated with said first-closed detector switch allows indication by another closed detector switch without restarting the machine.
Claim 6
Dependent Claim
97 words
A slack thread detector and stop motion circuit for multi-thread textile machines, comprising in combination: a plurality of detector circuits connected in parallel; and a stop motion circuit connected in series with said detector circuits, the stop motion circuit including an electrical energy source impressing a selected voltage across said detector circuits; each detector circuit including a normally open detector switch and a multi-layer diode in series therewith so that when any detector switch is closed, said selected voltage iS clamped to a lesser value ineffective to allow conduction of any diode in the remaining detector circuits.
Claim 7
Dependent Claim
97 words
A slack thread detector and stop motion circuit for multi-thread textile machines, comprising in combination: a plurality of detector circuits connected in parallel; and a stop motion circuit connected in series with said detector circuits, the stop motion circuit including an electrical energy source impressing a selected voltage across said detector circuits; each detector circuit including a normally open detector switch and a multi-layer diode in series therewith so that when any detector switch is closed, said selected voltage iS clamped to a lesser value ineffective to allow conduction of any diode in the remaining detector circuits.
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |