Patent US3870511A successfully refreshed from Google Patents.
Patent US1247684A successfully refreshed from Google Patents.
Patent US4660288A successfully refreshed from Google Patents.
Patent US3295733A successfully refreshed from Google Patents.
Patent US3828829A successfully refreshed from Google Patents.
US3828829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft inserting arrangement of fluid-jet loom
Assignee: Nissan Motor Co Ltd
•
Filing: 1973-02-07
•
Granted: 1974-08-13
•
Expires: 1993-02-07
Abstract
Abstract A weft inserting arrangement for use in a fluid-jet shuttleless loom using a solenoid-operated fluid flow control valve so that it is opened and closed in accordance with electric signals generated in synchronism with operating cycles of the loom and also so, that the timing and duration of the weft inserting cycles can be adjusted easily and precisely in accordance with the operating conditions of the loom and/or depending upon the types and counts of the weft yarns woven into cloth. The weft inserting arrangement may further have a fluid accumulator for projecting the weft yarn at a decreasing velocity so that the weft yarn in the shed of warp yarns is under a uniform tension.
Inventors
- 👤 M Gotoh
- 👤 Y Mizuno
- 👤 K Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:20
CPC Classifications
D; D03; D03D; D03D47/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A weft yarn inserting arrangement in a fluid-jet loom, comprising a fluid jet nozzle directed across a shed of warp yarns, fluid pumping means communicating with said fluid jet nozzle for pumping fluid to the nozzle, a solenoid-operated valve positioned intermediate between said nozzle and said pumping means for providing intermittent fluid communication between the nozzle and pumping means when opened and closed, electrical signal generating means for producing a pulse train which is substantially in synchronism with operating cycles of said loom, and a pulse modifier circuit responsive to said pulse train from the signal generating means for producing pulses which are in synchronism with pulses of said pulse train and having pulse widths which are variable at will, said pulse modifier circuit being electrically connected to said solenoid-operated valve for opening and closing the valve in cycles which are substantially synchronized with the pulses supplied thereto from said pulse modifier circuit and haVing durations which are related to said pulse widths.
Claim 2
Dependent Claim
163 words
A weft yarn inserting arrangement in a fluid-jet loom, comprising a fluid jet nozzle directed across a shed of warp yarns, fluid pumping means communicating with said fluid jet nozzle for pumping fluid to the nozzle, a solenoid-operated valve positioned intermediate between said nozzle and said pumping means for providing intermittent fluid communication between the nozzle and pumping means when opened and closed, electrical signal generating means for producing a pulse train which is substantially in synchronism with operating cycles of said loom, and a pulse modifier circuit responsive to said pulse train from the signal generating means for producing pulses which are in synchronism with pulses of said pulse train and having pulse widths which are variable at will, said pulse modifier circuit being electrically connected to said solenoid-operated valve for opening and closing the valve in cycles which are substantially synchronized with the pulses supplied thereto from said pulse modifier circuit and haVing durations which are related to said pulse widths.
Claim 3
Dependent Claim
34 words
A weft yarn inserting arrangement as claimed in claim 1, further comprising fluid accumulating means located intermediate between said pumping means and said solenoid-operated valve for temporarily storing the fluid from said pumping means.
Claim 4
Dependent Claim
29 words
A weft yarn inserting arrangement as claimed in claim 2, in which said fluid accumulating means has an expansible and compressible chamber which is filled with gas under pressure.
Claim 5
Dependent Claim
164 words
A weft yarn inserting arrangement as claimed in claim 1, in which said pulse modifier circuit comprises positive and negative bus lines, first and second transistors each having a collector electrode connected to the positive bus line through a resistor and an emitter electrode connected to the negative bus line, an input terminal connected to the collector electrode of said first transistor and the resistor associated therewith, an output terminal connected to the collector electrode of said second transistor and the resistor associated therewith, a capacitor which is connected at one electrode to said input terminal and at the other electrode to the base circuit of said second transistor, resistors connected to a base circuit of said first transistor and respectively to said negative bus line and to said output terminal, and a variable resistor connected at one end to said positive bus line and at the other to said other electrode of said capacitor and to said base circuit of said second transistor.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |