US3940042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control device
Assignee: Individual
•
Filing: 1974-10-24
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Granted: 1976-02-24
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Expires: 1994-10-24
Abstract
Abstract A device for equalizing the speeds at which material moves through different sections of a machine which includes a tiltable structure sensitive to the depth of sag of the material passing from one section to another, a coil having a straight longitudinal axis is attached to the tiltable structure, and a spaced strip is disposed alongside the coil to provide a straight raceway containing a conductive ball, whereby tilting of the structure may allow gravity to move the ball along the raceway and so vary the impedance between the ball and one end of the coil. Another feature involves having multiple balls in the raceway, preferably of different diameter.
Inventors
- 👤 Norman A. Keck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H20/00; B65H20/24; B65H23/042
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
200 words
In a machine wherein a flexible material is passed at varying speeds through one section of the machine and also through another section of the machine with the machine having a device coordinating the speed of said material and each of said sections, the improvement in said device comprising a tiltable structure, means sensitive to the extent of the material's sag between said sections for tilting said structure, an impedance element in the form of a coil about a straight longitudinal axis, said longitudinal axis extending substantially horizontally and radially of the axis of tilt of said structure, a strip of electrically conductive material parallel and spaced from said coil, said strip forming with said coil a straight raceway for a ball, a ball of electrically conductive material in said raceway whereby when said raceway is horizontal said ball is stationary but when inclined downwardly in one or another direction said ball is moved by gravity in said direction, and means sensitive to the impedance between one end of said coil and said ball for changing the speed of said material through one of said sections to bring the speed of said material in said sections more nearly into equilibrium.
Claim 2
Dependent Claim
200 words
In a machine wherein a flexible material is passed at varying speeds through one section of the machine and also through another section of the machine with the machine having a device coordinating the speed of said material and each of said sections, the improvement in said device comprising a tiltable structure, means sensitive to the extent of the material's sag between said sections for tilting said structure, an impedance element in the form of a coil about a straight longitudinal axis, said longitudinal axis extending substantially horizontally and radially of the axis of tilt of said structure, a strip of electrically conductive material parallel and spaced from said coil, said strip forming with said coil a straight raceway for a ball, a ball of electrically conductive material in said raceway whereby when said raceway is horizontal said ball is stationary but when inclined downwardly in one or another direction said ball is moved by gravity in said direction, and means sensitive to the impedance between one end of said coil and said ball for changing the speed of said material through one of said sections to bring the speed of said material in said sections more nearly into equilibrium.
Claim 3
Dependent Claim
38 words
A machine as set forth in claim 1 in which said tiltable structure has an arm which extends transversely of the axis of the tilt of said structure, and in which said coil is mounted on said arm.
Claim 4
Dependent Claim
26 words
A machine as set forth in claim 2 in which said coil is adjustably mounted to allow tilting of the coil with respect to the arm.
Claim 5
Dependent Claim
31 words
A machine as set forth in claim 1 in which said coil has an outer insulation coating having a window therein through which said ball contacts the wires of said coil.
Claim 6
Dependent Claim
64 words
A machine as set forth in claim 1 which includes a second ball within said raceway and in which both of said balls are in electrical contact with said coil and with said strip, and in which an electrical circuit is provided leading from one end of said coil through the ball which is closest said end of the coil and through said strip.
Claim 7
Dependent Claim
16 words
A machine as set forth in claim 5 in which said balls are of different diameter.
Claim 8
Dependent Claim
265 words
In a machine wherein a flexible material is passed at varying speeds through one section of the machine and also through another section of the machine with the machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a tiltable structure, means sensitive to the extent of the material's sag between said sections for tilting said structure, an impedance element in the form of of a coil about a straight longitudinal axis, said longitudinal axis extending substantially horizontally and radially of the axis of tilt of said structure, a strip of electrically conductive material parallel to and spaced from said coil, said strip forming with said coil a straight raceway for a ball, a ball of electrically conductive material in said raceway whereby when said raceway is horizontal said ball is stationary but when inclined downwardly in one or another direction said ball is moved by gravity in said direction, and means sensitive to the impedance between one end of said coil and said ball for changing the speed of said material through one of said sections to bring the speed of said material in said sections more nearly into equilibrium, said tiltable structure having an arm which extends transversely of the axis of the tilt of said structure, said coil being mounted on said arm, and said sensitive means including a member extending in one direction which member contacts said material, and which includes a weight mounted on said arm and slideable therealong to provide a counterbalancing effect to said last mentioned member.
Claim 9
Dependent Claim
265 words
In a machine wherein a flexible material is passed at varying speeds through one section of the machine and also through another section of the machine with the machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a tiltable structure, means sensitive to the extent of the material's sag between said sections for tilting said structure, an impedance element in the form of of a coil about a straight longitudinal axis, said longitudinal axis extending substantially horizontally and radially of the axis of tilt of said structure, a strip of electrically conductive material parallel to and spaced from said coil, said strip forming with said coil a straight raceway for a ball, a ball of electrically conductive material in said raceway whereby when said raceway is horizontal said ball is stationary but when inclined downwardly in one or another direction said ball is moved by gravity in said direction, and means sensitive to the impedance between one end of said coil and said ball for changing the speed of said material through one of said sections to bring the speed of said material in said sections more nearly into equilibrium, said tiltable structure having an arm which extends transversely of the axis of the tilt of said structure, said coil being mounted on said arm, and said sensitive means including a member extending in one direction which member contacts said material, and which includes a weight mounted on said arm and slideable therealong to provide a counterbalancing effect to said last mentioned member.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |