US3757831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for monitoring the shuttle flight in a loom
Assignee: Loepfe AG Gebrueder
•
Filing: 1972-05-18
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Granted: 1973-09-11
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Expires: 1992-05-18
Abstract
Abstract An equipment for monitoring the shuttle flight in a conventional loom provided with a shuttle, particularly for measuring and indicating the regularity of such shuttle flight comprising: at least one pair of control coils mounted along the shuttle race and a permanent magnet mounted in the shuttle for generating a control pulse every time the permanent magnet passes over a control coil; a second permanent magnet coupled to the drive means of the loom and tracing a cyclic path per shuttle passage, and at least one further coil arranged near said path for generating a cycle pulse every time the second permanent magnet passes by the further coil; circuitry for measuring time intervals elapsing between two successive of said pulses; and a selector switching device for establishing various operational connections from any pair of said coils to the time measuring circuitry. The equipment allows for adjusting the loom picking mechanism in an optimal manner and is designed for practical use in weaving mills.
Inventors
- 👤 E Loepfe
- 👤 H Theiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:16
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/58
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
224 words
An equipment for measuring and indicating the regularity of the shuttle flight in a loom provided with a shuttle, a shuttle race member, two picking members, and drive means coupled to the picking members for picking the shuttle in passages of alternately opposite directions along the shuttle race member, comprising: means comprising at least a pair of associated control coils mounted along the shuttle race member, and a control element mounted in the shuttle for generating a pair of control pulses every time the control element passes by said pair of control coils; means comprising a cycle element coupled to the drive means for tracing a closed path per shuttle passage, and at least one cycle coil mounted in adjustable relationship along the closed path for generating a cycle pulse every time the cycle element passes by each such cycle coil; circuitry having first and second inputs for measuring the length of the time interval elapsing between any two of said pulses fed to said first and second inputs, respectively; means operatively connected in series with said measuring circuitry for indicating said time interval; and a selector device comprising means for establishing operational connections from two of said control coils to said first and second inputs, or from one of said control coils and one cycle coil to said first and second inputs, respectively.
Claim 2
Dependent Claim
224 words
An equipment for measuring and indicating the regularity of the shuttle flight in a loom provided with a shuttle, a shuttle race member, two picking members, and drive means coupled to the picking members for picking the shuttle in passages of alternately opposite directions along the shuttle race member, comprising: means comprising at least a pair of associated control coils mounted along the shuttle race member, and a control element mounted in the shuttle for generating a pair of control pulses every time the control element passes by said pair of control coils; means comprising a cycle element coupled to the drive means for tracing a closed path per shuttle passage, and at least one cycle coil mounted in adjustable relationship along the closed path for generating a cycle pulse every time the cycle element passes by each such cycle coil; circuitry having first and second inputs for measuring the length of the time interval elapsing between any two of said pulses fed to said first and second inputs, respectively; means operatively connected in series with said measuring circuitry for indicating said time interval; and a selector device comprising means for establishing operational connections from two of said control coils to said first and second inputs, or from one of said control coils and one cycle coil to said first and second inputs, respectively.
Claim 3
Dependent Claim
58 words
The equipment as defined in claim 1, wherein the selector device further comprises cycle selecting means for selecting from two of said control coils the one to be connected to the first input, or the one to be connected with the first input and the one to be connected with the second input of the time measuring circuitry.
Claim 4
Dependent Claim
16 words
The equipment as defined in claim 1, wherein the indicating means comprises a tuning indicator tube.
Claim 5
Dependent Claim
21 words
The equipment as defined in claim 1, wherein the time measuring circuitry and the indicating means form a portable structural unit.
Claim 6
Dependent Claim
28 words
The equipment as defined in claim 1, further comprising means for supressing the time measurement during the passages of the shuttle in either direction of the shuttle flight.
Claim 7
Dependent Claim
61 words
The equipment as defined in claim 5, wherein the suppressing means comprises a trigger device controled by the loom drive means, and a normally open gate switch connected in series with the first input of the time measuring circuitry and operated by the trigger device to be closed only after said control element having passed over one of the control coils.
Claim 8
Dependent Claim
50 words
The equipment as defined in claim 1, wherein the time measuring circuitry comprises a time pulse circuit having a start input and a stop input for producing an output pulse whose duration corresponds to the time interval between two successive input pulses fed to the start and stop inputs, respectively.
Claim 9
Dependent Claim
45 words
The equipment as defined in claim 7, wherein the time measuring circuitry comprises an integration stage connected in series with the output of the time pulse circuit for producing an output sigNal whose amplitude corresponds to the time interval between said two successive input pulses.
Claim 10
Dependent Claim
40 words
The equipment as defined in claim 8, wherein the time measuring circuitry comprises a holding stage connected in series with the output of the integration stage for holding the amplitude of the output signal thereof during a predetermined time interval.
Claim 11
Dependent Claim
67 words
The equipment as defined in claim 1, wherein the time measuring circuitry comprises a count pulse generator, a normally blocked gate circuit having a signal input connected in series with the count pulse generator, and first and second gate inputs, and a circuit operatively connected in series with the gate circuit for counting and registering count pulses passing through the gate circuit during an opening interval thereof.
References Cited (Backward Citations)
US3181573A
Cited
US3326246A
Cited
FR1541187A
Cited
US3565126A
Cited
US3613742A
Cited
US3570550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |