US3677307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement provided with a photo-cell and controlling the detecting means and the stop motion in a loom upon breaking of a thread in the warping, weaving and knitting systems
Assignee: Individual
•
Filing: 1970-06-22
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Granted: 1972-07-18
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Expires: 1990-06-22
Abstract
Abstract In a loom or warping system, a safety arrangement is provided for operating machine-stopping or detecting means whenever a thread breaks. To this end, the sheet of parallel threads is constrained to pass over a braking member, in practice between frictionally acting parallel transverse bars, so that upon breaking of a thread beyond the braking member, said thread may continue progressing to the rear of and towards the latter by reason of the driving action of the adjacent threads. The broken thread gathers thus into a ball adjacent the braking member on the path of a pencil of light grazing the sheet of threads just before it reaches the braking member and sent out by a source of light towards a photo-cell releasing an alarm or the like mechanism whenever a thread breaks. The source of light and photo-cell are advantageoulsy rigid with the braking member so as to make the operation independent of the vibrations of the loom, warping system or the like machine.
Inventors
- 👤 Georges P Fiorucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:39
CPC Classifications
D; D04; D04B; D04B35/00; D04B35/10; D04B35/14; D03; D03D; D03D51/00; D03D51/18; D03D51/20; D03D51/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
In the thread feed of a fabric forming machine, such as a loom or the like, wherein a plurality of substantially parallel threads are drawn from a supply to a beam, in a common plane, and in which a light beam of a photoelectric device is directed across the threads in closely adjacent relation to the common plane to detect thread breakage, an improved safety system comprising a braking member engageable with said threads immediately adjacent said light beam and after the threads have passed said light beam; said braking member, upon breakage of a thread beyond the braking member, stopping advance of the broken thread, by entraining of the broken thread by adjacent threads, to cause the broken thread to form a ball, at said braking member, in the path of said light beam.
Claim 2
Dependent Claim
135 words
In the thread feed of a fabric forming machine, such as a loom or the like, wherein a plurality of substantially parallel threads are drawn from a supply to a beam, in a common plane, and in which a light beam of a photoelectric device is directed across the threads in closely adjacent relation to the common plane to detect thread breakage, an improved safety system comprising a braking member engageable with said threads immediately adjacent said light beam and after the threads have passed said light beam; said braking member, upon breakage of a thread beyond the braking member, stopping advance of the broken thread, by entraining of the broken thread by adjacent threads, to cause the broken thread to form a ball, at said braking member, in the path of said light beam.
Claim 3
Dependent Claim
42 words
A safety system as claimed in claim 1 wherein the thread-braking member operates through friction and includes two parallel bars between which the sheet of threads is adapted to progress the operative surface of one of said bars being lined with felt.
Claim 4
Dependent Claim
40 words
A safety system as claimed in claim 1 wherein the thread-braking member operates through friction and includes two parallel bars between which the sheet of threads is adapted to progress, and means for adjusting the pressure between the two bars.
Claim 5
Dependent Claim
49 words
An arrangement as claimed in claim 1 comprising a support common to the thread-braking member, to the source of light and to the photo-cell whereby the relative position of the braking member with reference to the pencil of light is stationary and independent of the vibrations of the machine.
Claim 6
Dependent Claim
36 words
An arrangement as claimed in claim 1 comprising a screen extending above the path followed by the pencil of light and a common support for the source of light, for the photo-cell and for the screen.
Claim 7
Dependent Claim
21 words
An arrangement as claimed in claim 1 including means for transiently moving the thread-braking member away from the sheet of threads.
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |