Patent US3890547A successfully refreshed from Google Patents.
US3890547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control device
Assignee: Individual
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Filing: 1972-03-31
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Granted: 1975-06-17
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Expires: 1992-03-31
Abstract
Abstract In a machine where a flexible material is passed consecutively through two sections of a machine, a device for controlling the speed at which the material is passed through one of such sections to correspond with the speed at which the material is passed through the other of these sections, including a series of mercury switches mounted on a structure which is tilted in response to the position of a loop of material between the sections, the tilting movement serving to actuate the switches to affect a network associated with a motor to cause the motor to increase or decrease the speed of the material through the one section of the machine as is called for by the extent of the tilting movement.
Inventors
- 👤 Norman Keck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:46
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H20/00; B65H20/24; B65H23/188; B65H23/192
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
306 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 said material sagging between said sections to form a loop, said machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a titltable structure, a switch on said tiltable structure, said switch being of the type which shifts between making contacts and breaking contacts when its axis is tilted to a predetermined angle with the horizontal, said switch being adjustably mounted on said structure to permit adjustment by tilting said switch with respect to said tiltable structure, means sensitive to the extent said material sags between said sections for tilting said structure, and means sensitive to a shift of said switch upon the tilting of said switch to bring its axis to said predetermined angle 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 mAchine including a plurality of said switches mounted on said tiltable structure each separately tiltable with respect to said structure, each of said switches being separately adjustable to permit tilting of the switch with respect to said structure, said sensitive means being effective to tilt said structure to a predetermined angle to operate one of said switches when said material sags to one extent and to tilt said structure to operate another of said switches when said material sags to a greater extent, and means sensitive to the operation of said other switch for changing by a second increment the speed at which said material passes through said one section to thereby bring the speed of said material in said sections still more nearly into equilibrium.
Claim 2
Dependent Claim
306 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 said material sagging between said sections to form a loop, said machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a titltable structure, a switch on said tiltable structure, said switch being of the type which shifts between making contacts and breaking contacts when its axis is tilted to a predetermined angle with the horizontal, said switch being adjustably mounted on said structure to permit adjustment by tilting said switch with respect to said tiltable structure, means sensitive to the extent said material sags between said sections for tilting said structure, and means sensitive to a shift of said switch upon the tilting of said switch to bring its axis to said predetermined angle 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 mAchine including a plurality of said switches mounted on said tiltable structure each separately tiltable with respect to said structure, each of said switches being separately adjustable to permit tilting of the switch with respect to said structure, said sensitive means being effective to tilt said structure to a predetermined angle to operate one of said switches when said material sags to one extent and to tilt said structure to operate another of said switches when said material sags to a greater extent, and means sensitive to the operation of said other switch for changing by a second increment the speed at which said material passes through said one section to thereby bring the speed of said material in said sections still more nearly into equilibrium.
Claim 3
Dependent Claim
82 words
A machine as set forth in claim 1 wherein each of said switches is a mercury switch, the machine including a band about each of said switches having an opening therein, and including a screw extending through each of said openings and into said structure, each of said screws being seperately turnable one way to loosen one of said switches for tilting the switch about the axis of the screw and the other way to again tighten the switch to said structure.
Claim 4
Dependent Claim
163 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 said material sagging between said sections to form a loop, said machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a tiltable structure, a switch on said tiltable structure, said switch being of the type which shifts between making contacts and breaking contacts when its axis is tilted to a predetermined angle with the horizontal, said switch being adjustably mounted on said structure to permit adjustment by tilting said switch with respect to said tiltable structure, means sensitive to the extent said material sags between said sections for tilting said structure, said means including a roller member which rests on the top surface of said material and in frictional engagement with said material, said titltable structure being mounted on said roller for rotation therewith.
Claim 5
Dependent Claim
163 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 said material sagging between said sections to form a loop, said machine having a device coordinating the speed of said material in each of said sections, the improvement in said device comprising a tiltable structure, a switch on said tiltable structure, said switch being of the type which shifts between making contacts and breaking contacts when its axis is tilted to a predetermined angle with the horizontal, said switch being adjustably mounted on said structure to permit adjustment by tilting said switch with respect to said tiltable structure, means sensitive to the extent said material sags between said sections for tilting said structure, said means including a roller member which rests on the top surface of said material and in frictional engagement with said material, said titltable structure being mounted on said roller for rotation therewith.
Claim 6
Dependent Claim
31 words
A machine as set forth in claim 3 including a guide structure for holding said tiltable structure against movement longitudinally of said material, but permitting said tiltable structure to move vertically.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |