US3869759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive means for textile sliver drafting assembly
Assignee: SACO LOWELL CORP
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Filing: 1973-10-24
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Granted: 1975-03-11
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Expires: 1993-10-24
Abstract
Abstract Axially-fixed countershafts mounted beneath and parallel to the rearward drafting rolls are driven from the front drafting roll by gearing disposed to one side of the drafting assembly and including fixed-center change gears and a variable ratio epicyclic gear unit usable in conjunction with a sliver leveler or evener. The rearward drafting rolls are driven from the countershafts by timing belts disposed on the opposite side of the drafting assembly from the aforesaid gearing and having automatically operable tension compensating means associated therewith. Precise changes in the speed and/or position of the rearward drafting rolls may be quickly and easily effected.
Inventors
- 👤 Richard J Savageau
- 👤 Gordon C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
388 words
In combination with a two-delivery textile drawing machine having first and second sliver drafting assemblies each including a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, first and second drive means respectively associated with said first and second drafting assemblies and each interconnecting said front roll and said rearward rolls of the associated one of said assemblies for driving said rearward rolls of said assembly at desired speeds in any adjustive position of said rolls, each said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and underlying said rearward rolls of the associated one of said drafting assemblies and extending in spaced and generally parallel relationship to associated ones of said rearward rolls; gearing means disposed adjacent one side of said one assembly and drivingly interconnecting said front roll thereof and said countershafts, said gearing means including a plurality of sets of change gears all rotatable about fixed axes, one of said sets being adapted to control the speed of all said rearward rolls of said assembly, another of said sets being adapted to control the speed of only one of said rearward rolls of said assembly, and still another of said sets being adapted to control the speed of only another one of said rearward rolls of said assembly; flexible timing belt drive means disposed adjacent the other side of said drafting assembly and drivably interconnecting respective ones of said countershafts and said rearward rolls, said timing belt means including a plurality of timing belts corresponding in number to said rearward rolls of said assembly and each interconnecting one of said rearward rolls and an associated one of said countershafts; and a plurality of tension compensating assemblies corresponding in number to and each operatively associated with one of said timing belts, each of said tension compensating assemblies including a swing arm pivotally mounted adjacent one end thereof, an idler pulley mounted adjacent the other end of said arm for pivotal movement therewith, and spring means adjacent said one end of said arm biasing said arm in a direction urging said idler pulley into tensioning engagement with the associated one of said timing belts.
Claim 2
Dependent Claim
388 words
In combination with a two-delivery textile drawing machine having first and second sliver drafting assemblies each including a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, first and second drive means respectively associated with said first and second drafting assemblies and each interconnecting said front roll and said rearward rolls of the associated one of said assemblies for driving said rearward rolls of said assembly at desired speeds in any adjustive position of said rolls, each said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and underlying said rearward rolls of the associated one of said drafting assemblies and extending in spaced and generally parallel relationship to associated ones of said rearward rolls; gearing means disposed adjacent one side of said one assembly and drivingly interconnecting said front roll thereof and said countershafts, said gearing means including a plurality of sets of change gears all rotatable about fixed axes, one of said sets being adapted to control the speed of all said rearward rolls of said assembly, another of said sets being adapted to control the speed of only one of said rearward rolls of said assembly, and still another of said sets being adapted to control the speed of only another one of said rearward rolls of said assembly; flexible timing belt drive means disposed adjacent the other side of said drafting assembly and drivably interconnecting respective ones of said countershafts and said rearward rolls, said timing belt means including a plurality of timing belts corresponding in number to said rearward rolls of said assembly and each interconnecting one of said rearward rolls and an associated one of said countershafts; and a plurality of tension compensating assemblies corresponding in number to and each operatively associated with one of said timing belts, each of said tension compensating assemblies including a swing arm pivotally mounted adjacent one end thereof, an idler pulley mounted adjacent the other end of said arm for pivotal movement therewith, and spring means adjacent said one end of said arm biasing said arm in a direction urging said idler pulley into tensioning engagement with the associated one of said timing belts.
Claim 3
Dependent Claim
388 words
In combination with a two-delivery textile drawing machine having first and second sliver drafting assemblies each including a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, first and second drive means respectively associated with said first and second drafting assemblies and each interconnecting said front roll and said rearward rolls of the associated one of said assemblies for driving said rearward rolls of said assembly at desired speeds in any adjustive position of said rolls, each said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and underlying said rearward rolls of the associated one of said drafting assemblies and extending in spaced and generally parallel relationship to associated ones of said rearward rolls; gearing means disposed adjacent one side of said one assembly and drivingly interconnecting said front roll thereof and said countershafts, said gearing means including a plurality of sets of change gears all rotatable about fixed axes, one of said sets being adapted to control the speed of all said rearward rolls of said assembly, another of said sets being adapted to control the speed of only one of said rearward rolls of said assembly, and still another of said sets being adapted to control the speed of only another one of said rearward rolls of said assembly; flexible timing belt drive means disposed adjacent the other side of said drafting assembly and drivably interconnecting respective ones of said countershafts and said rearward rolls, said timing belt means including a plurality of timing belts corresponding in number to said rearward rolls of said assembly and each interconnecting one of said rearward rolls and an associated one of said countershafts; and a plurality of tension compensating assemblies corresponding in number to and each operatively associated with one of said timing belts, each of said tension compensating assemblies including a swing arm pivotally mounted adjacent one end thereof, an idler pulley mounted adjacent the other end of said arm for pivotal movement therewith, and spring means adjacent said one end of said arm biasing said arm in a direction urging said idler pulley into tensioning engagement with the associated one of said timing belts.
Claim 4
Dependent Claim
388 words
In combination with a two-delivery textile drawing machine having first and second sliver drafting assemblies each including a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, first and second drive means respectively associated with said first and second drafting assemblies and each interconnecting said front roll and said rearward rolls of the associated one of said assemblies for driving said rearward rolls of said assembly at desired speeds in any adjustive position of said rolls, each said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and underlying said rearward rolls of the associated one of said drafting assemblies and extending in spaced and generally parallel relationship to associated ones of said rearward rolls; gearing means disposed adjacent one side of said one assembly and drivingly interconnecting said front roll thereof and said countershafts, said gearing means including a plurality of sets of change gears all rotatable about fixed axes, one of said sets being adapted to control the speed of all said rearward rolls of said assembly, another of said sets being adapted to control the speed of only one of said rearward rolls of said assembly, and still another of said sets being adapted to control the speed of only another one of said rearward rolls of said assembly; flexible timing belt drive means disposed adjacent the other side of said drafting assembly and drivably interconnecting respective ones of said countershafts and said rearward rolls, said timing belt means including a plurality of timing belts corresponding in number to said rearward rolls of said assembly and each interconnecting one of said rearward rolls and an associated one of said countershafts; and a plurality of tension compensating assemblies corresponding in number to and each operatively associated with one of said timing belts, each of said tension compensating assemblies including a swing arm pivotally mounted adjacent one end thereof, an idler pulley mounted adjacent the other end of said arm for pivotal movement therewith, and spring means adjacent said one end of said arm biasing said arm in a direction urging said idler pulley into tensioning engagement with the associated one of said timing belts.
Claim 5
Dependent Claim
85 words
Apparatus as in claim 1, including sliver leveling or evening devices operable in association with associated ones of said drafting assemblies when correction of variations in the uniformity of the sliver drafted by said assemblies is desired, and wherein said gearing means further includes an epicyclic gear unit driven by said front roll of said one assembly and adapted to also receive an output-modifying input from the associated one of said sliver leveling or evening devices during operation thereof in association with said one assembly.
Claim 6
Dependent Claim
283 words
In combination with a textile sliver drafting assembly having a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, drive means interconnecting said front roll and said rolls rearwardly thereof for driving said rearward rolls at desired speeds in any adjustive position thereof, said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and each extending generally parallel to an associated one of said rearward rolls; gearing means drivably interconnecting said front roll and said countershafts, said gearing means including a plurality of change gears all rotatable about fixed axes; flexible drive means drivably interconnecting said countershafts and associated ones of said rearward rolls; tension compensating means biased into engagement with said flexible drive means and movable toward and away therefrom in response to tension variations therein for automatically maintaining said flexible drive means under proper tension in all adjustive positions of said rearward rolls; said rearward rolls of said drafting assembly including a back roll and two intermediate rolls between said front roll and said back roll, and said gearing means further including a plurality of sets of said change gears for controlling the speeds of desired ones of said rearward rolls, one of said sets being adapted to control the speed of all of said rearward rolls, a second of said sets being adapted to control the speed of only one of said intermediate rolls, and a third of said sets of said change gears being adapted to control the speed of only the other of said intermediate rolls.
Claim 7
Dependent Claim
283 words
In combination with a textile sliver drafting assembly having a driven front bottom roll and a plurality of additional bottom rolls mounted rearwardly of and parallel to said front roll for independent adjustment toward and away from each other and said front roll to vary the spacing therebetween, drive means interconnecting said front roll and said rolls rearwardly thereof for driving said rearward rolls at desired speeds in any adjustive position thereof, said drive means comprising: a plurality of axially-fixed countershafts corresponding in number to and each extending generally parallel to an associated one of said rearward rolls; gearing means drivably interconnecting said front roll and said countershafts, said gearing means including a plurality of change gears all rotatable about fixed axes; flexible drive means drivably interconnecting said countershafts and associated ones of said rearward rolls; tension compensating means biased into engagement with said flexible drive means and movable toward and away therefrom in response to tension variations therein for automatically maintaining said flexible drive means under proper tension in all adjustive positions of said rearward rolls; said rearward rolls of said drafting assembly including a back roll and two intermediate rolls between said front roll and said back roll, and said gearing means further including a plurality of sets of said change gears for controlling the speeds of desired ones of said rearward rolls, one of said sets being adapted to control the speed of all of said rearward rolls, a second of said sets being adapted to control the speed of only one of said intermediate rolls, and a third of said sets of said change gears being adapted to control the speed of only the other of said intermediate rolls.
Claim 8
Dependent Claim
49 words
Apparatus as in claim 3, wherein said countershafts underlie said drafting assembly and said gearing means is disposed adjacent and entirely to one side of said assembly and said flexible drive means is disposed distal from said gearing means adjacent and entirely to the other side of said assembly.
Claim 9
Dependent Claim
20 words
Apparatus as in claim 4, wherein said flexible drive means comprises a plurality of timing belts and associated timing pulleys.
Claim 10
Dependent Claim
89 words
Apparatus as in claim 5, wherein said tension compensating means comprises a plurality of tension compensating assemblies each operatively associated with a corresponding one of said timing belts, each of said tension compensating assemblies including a swing arm pivotally mounted adjacent one end thereof, an idler pulley mounted adjacent the other end of said arm for pivotal movement therewith, and spring means adjacent said one end of said arm biasing said arm in a direction urging said idler pulley into engagement with an associated one of said timing belts.
Claim 11
Dependent Claim
35 words
Apparatus as in claim 3, wherein said countershafts underlie said rearward rolls, and wherein said flexible drive means includes a plurality of timing belts each interconnecting associated ones of said countershafts and said rearward rolls.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |