US3804128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dobby for looms
Assignee: M&T HARSHAW
•
Filing: 1972-11-14
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Granted: 1974-04-16
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Expires: 1992-11-14
Abstract
Abstract A dobby for looms of the type in which an arrangement of actuating members or amplifier relays which is interposed between a reading device and pulling levers is controlled by a common shaft to which in use a cyclic rotary motion is imparted. Each member comprises a profiled cam loosely mounted on the common shaft and provided with a sliding cotter. During periods in which the common shaft is stopped, the cotter can be displaced by either one of two pivoting fingers which are controlled by the reading device. The control is such as to ensure that either the shaft and cam are prevented from rotating relative to each other, or the cam cannot be moved. A moving part is provided which supports a roller held in contact with the periphery of the cam, the moving part being attached to the corresponding pulling lever.
Inventors
- 👤 L Amigues
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
D; D03; D03C; D03C1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
In a dobby for looms of the kind comprising a number of actuating members which are interposed between a common reading device and pivoted pulling levers associated with looms healds and which are controlled by a common driving shaft rotated intermittently through successive advances of 180* in synchronism with operation of the loom, and wherein each of said actuating members comprises a cam loosely carried by said common driving shaft and means under control of said common reading device to angularly connect said cam with said common driving shaft to raise and lower the corresponding one of said pivoted pulling levers, the improvement according to which said each actuating member comprises a cradle which partially surrounds said cam, two opposed rollers rotatably carried by said cradle to peripherically engage said cam, and a first and second connecting rod to support said cradle, said first connecting rod being positively connected with said corresponding one of said pivoted pulling levers.
Claim 2
Dependent Claim
158 words
In a dobby for looms of the kind comprising a number of actuating members which are interposed between a common reading device and pivoted pulling levers associated with looms healds and which are controlled by a common driving shaft rotated intermittently through successive advances of 180* in synchronism with operation of the loom, and wherein each of said actuating members comprises a cam loosely carried by said common driving shaft and means under control of said common reading device to angularly connect said cam with said common driving shaft to raise and lower the corresponding one of said pivoted pulling levers, the improvement according to which said each actuating member comprises a cradle which partially surrounds said cam, two opposed rollers rotatably carried by said cradle to peripherically engage said cam, and a first and second connecting rod to support said cradle, said first connecting rod being positively connected with said corresponding one of said pivoted pulling levers.
Claim 3
Dependent Claim
42 words
In a dobby as claimed in claim 1, said corresponding one of said pivoted pulling levers being pivoted on a fixed pivot and said first connecting rod being in the form of an extension of said corresponding one of said pivoted levers.
Claim 4
Dependent Claim
59 words
In a dobby as claimed in claim 1, said means to angularly connect said cam with said common driving shaft comprising a controlling rod connected with said common reading device to be axially shifted in one and the other directions, and two pivoted fingers connected with said controlling rod on the side of said cam opposed to said cradle.
Claim 5
Dependent Claim
102 words
In a dobby as claimed in claim 3, said cam having a radial aperture and a lateral groove which opens into said radial aperture, and said dobby further comprising a connecting ring driven by the said common driving shaft and having two diametrically opposed notches, an inwardly biased cotter slidably housed inside the said radial aperture and provided with a notch normally disposed in line with said lateral groove, while said two pivoted fingers have a bent end nose engaged into said lateral groove for shifting said inwardly biased cotter and engage same into one or the other of said opposed notches.
Claim 6
Dependent Claim
53 words
In a dobby as claimed in claim 4, said cam having an additional groove outwardly exterior to said lateral groove and concentrically disposed with respect of same, while said connecting ring has a peripherically bent edge which is engaged into said additional groove, said opposed notches being cut into said peripherically bent edge.
References Cited (Backward Citations)
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Cited
US1256644A
Cited
FR1201358A
Cited
US3180366A
Cited
FR1405184A
Cited
US3468347A
Cited
US3724510A
Cited
US3730231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |