US3661334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for reducing contact pressure of a bobbin contacting a drive drum of a thread winding arrangement
Assignee: Maschinenfabrik Rieter AG
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Filing: 1969-10-14
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Granted: 1972-05-09
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Expires: 1989-10-14
Abstract
Abstract There is disclosed a device for reducing the contact pressure of a bobbin contacting a drive drum of a winding arrangement for threads or the like. The inventive device comprises a machine frame, a pivotable bobbin support arm and loading spring means cooperating with said bobbin support arm for providing the bobbin contact pressure. A lever is pivotably arranged on the machine frame and a guide element determines the position of said lever. According to an important aspect of the invention, the loading spring means is attached to the bobbin support arm in the vicinity of the bobbin and is hinged to the machine frame via the aforesaid lever, so that the guide element of the bobbin support arm deflects this lever and the loading spring means over a certain distance while the bobbin support arm is tilted.
Inventors
- 👤 Felix Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:13
CPC Classifications
B; B65; B65H; B65H54/00; B65H54/02; B65H54/40; B65H54/52; B65H2601/00; B65H2601/50; B65H2601/52; B65H2601/524; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
273 words
A device for reducing the contact pressure of a bobbin having a bobbin axis and which contacts a drive drum of a winding arrangement for threads or the like wound into a thread package on the bobbin, comprising a pivotable bobbin support arm, means for mounting said bobbin support arm for pivotal movement from a starting position where the empty bobbin contacts the drive drum through a vertical position as the thread package progressively builds-up on the bobbin and into a fully tilted-out bobbin-change position where the bobbin is out of contact with the drive drum, loading spring Means cooperating with said pivotable bobbin support arm for providing the bobbin contact pressure, a machine frame, a lever pivotably attached at said machine frame, said lever being provided with a cam surface, a guide element provided for said bobbin support arm engageable with said cam surface for determining the position of said lever, said spring means being attached at one end to said bobbin support arm at the vicinity of the bobbin axis and at its other end to said machine frame through the agency of said lever, so that said guide element of said bobbin support arm deflects said lever along its cam surface together with said spring means through a certain distance when the bobbin support arm is pivoted, the weight of the thread package initially urging the bobbin support arm against the drive drum as the bobbin support arm moves from said starting position towards said vertical position whereas upon passing through said vertical position the weight of the thread package urges said bobbin support arm away from the drive drum.
Claim 2
Independent Claim
273 words
A device for reducing the contact pressure of a bobbin having a bobbin axis and which contacts a drive drum of a winding arrangement for threads or the like wound into a thread package on the bobbin, comprising a pivotable bobbin support arm, means for mounting said bobbin support arm for pivotal movement from a starting position where the empty bobbin contacts the drive drum through a vertical position as the thread package progressively builds-up on the bobbin and into a fully tilted-out bobbin-change position where the bobbin is out of contact with the drive drum, loading spring Means cooperating with said pivotable bobbin support arm for providing the bobbin contact pressure, a machine frame, a lever pivotably attached at said machine frame, said lever being provided with a cam surface, a guide element provided for said bobbin support arm engageable with said cam surface for determining the position of said lever, said spring means being attached at one end to said bobbin support arm at the vicinity of the bobbin axis and at its other end to said machine frame through the agency of said lever, so that said guide element of said bobbin support arm deflects said lever along its cam surface together with said spring means through a certain distance when the bobbin support arm is pivoted, the weight of the thread package initially urging the bobbin support arm against the drive drum as the bobbin support arm moves from said starting position towards said vertical position whereas upon passing through said vertical position the weight of the thread package urges said bobbin support arm away from the drive drum.
Claim 3
Dependent Claim
35 words
A device as defined in claim 1, wherein the pivot point of said lever is located in the vicinity of the pivot axis of said bobbin support arm between the latter and the machine frame.
Claim 4
Dependent Claim
35 words
A device as defined in claim 1, wherein the points of attachment of said spring means and said lever are located along a straight line when said bobbin support arm is in its starting position.
Claim 5
Dependent Claim
32 words
A device as defined in claim 1, wherein said cam surface is designed such that it deflects said lever and spring means when said bobbin support arm moves through said vertical position.
Claim 6
Dependent Claim
47 words
A device as defined in claim 1, wherein said cam surface defines a quadrant of a circle which at its lower end is directed upwardly in the direction of said bobbin support arm and then at its upper end is directed laterally towards said bobbin support arm.
Claim 7
Dependent Claim
49 words
A device as defined in claim 5, wherein said lever is provided with projection means at the end of said quadrant of a circle, said projection means extending approximately in the direction of said bobbin support arm when the latter is tilted out fully into a bobbin change position.
Claim 8
Dependent Claim
48 words
A device as defined in claim 6, wherein said projection means at the end of said quadrant of a circle prevents said bobbin support arm when in its bobbin change position from tilting back by itself after said guide element has moved into contact with said projection means.
Claim 9
Dependent Claim
19 words
A device as defined in claim 1, further including damping means to which said bobbin support arm is connected.
Claim 10
Independent Claim
272 words
A device for reducing the contact pressure of a bobbin having a bobbin axis and which contacts a drive drum of a winding arrangement for threads or the like wound into a thread package on the bobbin, comprising a pivotable bobbin support arm, means for mounting said bobbin support arm for pivotal movement from a starting position where the empty bobbin contacts the drive drum through a vertical position as the thread package progressively builds-up on the bobbin and into a fully tilted-out bobbin-change position where the bobbin is out of contact with the drive drum, loading spring means cooperating with said pivotable bobbin support arm for providing the bobbin contact pressure, a machine frame, a lever pivotably arranged at said machine frame, said lever being provided with a cam surface, a guide element carried by said bobbin support arm and engageable with said cam surface for determining the position of said lever, said spring means being attached at one end to said bobbin support arm at the vicinity of the bobbin axis and at its other end to said machine frame through the agency of said lever, so that said guide element deflects said lever along its cam surface together with said spring means when said bobbin support arm has moved through a predetermined angle of pivotal movement, the weight of the thread package initially urging the bobbin support arm against the drive drum as the bobbin support arm moves from said starTing position towards said vertical position whereas upon passing through said vertical position the weight of the thread package urges said bobbin support arm away from the drive drum.
Claim 11
Independent Claim
272 words
A device for reducing the contact pressure of a bobbin having a bobbin axis and which contacts a drive drum of a winding arrangement for threads or the like wound into a thread package on the bobbin, comprising a pivotable bobbin support arm, means for mounting said bobbin support arm for pivotal movement from a starting position where the empty bobbin contacts the drive drum through a vertical position as the thread package progressively builds-up on the bobbin and into a fully tilted-out bobbin-change position where the bobbin is out of contact with the drive drum, loading spring means cooperating with said pivotable bobbin support arm for providing the bobbin contact pressure, a machine frame, a lever pivotably arranged at said machine frame, said lever being provided with a cam surface, a guide element carried by said bobbin support arm and engageable with said cam surface for determining the position of said lever, said spring means being attached at one end to said bobbin support arm at the vicinity of the bobbin axis and at its other end to said machine frame through the agency of said lever, so that said guide element deflects said lever along its cam surface together with said spring means when said bobbin support arm has moved through a predetermined angle of pivotal movement, the weight of the thread package initially urging the bobbin support arm against the drive drum as the bobbin support arm moves from said starTing position towards said vertical position whereas upon passing through said vertical position the weight of the thread package urges said bobbin support arm away from the drive drum.
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |