US3906876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive for yarn feed roll assembly
Assignee: SPENCER WRIGHT INDUSTRIES Inc A CORP OF TENNESSEE
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Filing: 1974-10-17
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Granted: 1975-09-23
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Expires: 1994-10-17
Abstract
Abstract A variable speed drive for a tufting machine pattern attachment having a yarn feed roller assembly which allows the speed to be varied with the tufting machine inoperative. The yarn feed roller assembly includes a plurality of shafts which are driven at different speeds. The drive includes a variable speed regulator for each different shaft speed. The outputs of each regulator drives the respective shaft through a one-way clutch. The input to all the regulators is through a one-way clutch from the main motor of the tufting machine. An auxiliary motor, which drives in a reverse direction to the main motor, is operatively connected to the input of all the regulators between the regulators and the one-way clutch and free wheels in the direction of the main motor during operation of the tufting machine. To change the speeds of the yarn feed roller assembly shafts, the main motor is shut so as to make the tufting machine inoperative and the auxiliary motor is excited. The variable speed regulators may thereafter be adjusted.
Inventors
- 👤 Nigel S Fitton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:37
CPC Classifications
D; D05; D05C; D05C15/00; D05C15/04; D05C15/08; D05C15/26; D05C15/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
A variable speed drive for a tufting machine pattern attachment having a plurality of yarn feed roll drive shafts with certain of the shafts adapted to be rotatable at different speeds, said drive comprising a main motor, a speed regulating unit for each different feed roll drive shaft speed, each regulating unit having an input shaft and an output shaft and means for varying the speed of the output shaft relative to the input shaft only while the unit is driven, a first drive transmitting means between the main motoR and the input shaft of each regulating unit to drive the regulating units in a first direction, a second drive transmitting means between the output shaft of each regulating unit and corresponding feed roll drive shafts, said second drive transmitting means including means operative to effect a drive coupling only when the regulating units are driven in said first direction, and auxiliary motor operative only when a feed roll drive shaft speed variation is to be effected, and a third drive transmitting means between the auxiliary motor and the input shaft of each regulating unit to drive the regulating units in a reverse direction to said first direction.
Claim 2
Dependent Claim
198 words
A variable speed drive for a tufting machine pattern attachment having a plurality of yarn feed roll drive shafts with certain of the shafts adapted to be rotatable at different speeds, said drive comprising a main motor, a speed regulating unit for each different feed roll drive shaft speed, each regulating unit having an input shaft and an output shaft and means for varying the speed of the output shaft relative to the input shaft only while the unit is driven, a first drive transmitting means between the main motoR and the input shaft of each regulating unit to drive the regulating units in a first direction, a second drive transmitting means between the output shaft of each regulating unit and corresponding feed roll drive shafts, said second drive transmitting means including means operative to effect a drive coupling only when the regulating units are driven in said first direction, and auxiliary motor operative only when a feed roll drive shaft speed variation is to be effected, and a third drive transmitting means between the auxiliary motor and the input shaft of each regulating unit to drive the regulating units in a reverse direction to said first direction.
Claim 3
Dependent Claim
39 words
A variable speed drive for a tufting machine pattern attachment as recited in claim 1 wherein said means operative to effect a drive coupling only when the regulating units are driven in said first direction comprises one-way clutch means.
Claim 4
Dependent Claim
32 words
A variable speed drive for a tufting machine pattern attachment as recited in claim 1 wherein said first drive transmitting means includes means to disengage the first motor from the regulating units.
Claim 5
Dependent Claim
89 words
A variable speed drive for a tufting machine pattern attachment as recited in claim 3 wherein said first and third drive transmitting means include a common shaft, said main motor adapted to rotatably drive said shaft in one direction and said auxiliary motor adapted to rotatably drive said shaft in the opposite direction, said means to disengage the main motor from the regulating units comprise means operative to effect a drive coupling between said main motor and said shaft only when said shaft is driven in said one direction.
Claim 6
Dependent Claim
34 words
A variable speed drive for a tufting machine pattern attachment as recited in claim 4 wherein said means to effect a drive coupling between said main motor and said shaft comprises one-way clutch means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |