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US3760250A Expired / Lapsed US ⏱️ 0.0 years remaining

Emergency stop control system for cloth spreading machine

Assignee: Cutters Machine Co Inc
•
Filing: 1972-09-11
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Granted: 1973-09-18
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Expires: 1992-09-11
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Abstract

Abstract An electrically driven and controlled cloth spreading machine including means for controlling the high and low speeds, the braking, and reversing of a machine, characterized by an emergency switch system for de-energizing the drive of the machine and actuating the reverse control means, when the switch for shifting the controls from the high speed to the low speed mode fails to function.

Inventors

  • 👤 S Pearsall
  • 👤 N Witthauer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 10:31
CPC Classifications
A; A41; A41H; A41H43/00; A41H43/005

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 235 words
An emergency stop control apparatus for a cloth spreading machine having a frame supported for longitudinal movement over a cloth-laying surface between reversing stations, a spreader unit to spread cloth in layers, and means for supplying cloth to the spreader unit, comprising: a. electrically energized motor drive means for moving said frame longitudinally of said surface, b. electrical speed control means including selector switch means operable to switch said speed control means between a high-speed mode and a low-speed mode to energize said drive means to move said frame respectively at a high speed or a low speed, c. a trigger circuit including a low-speed switch, d. said trigger circuit beiNg operably connected to said selector switch means to operate said speed control means in said low-speed mode upon actuation of said low-speed switch, e. low-speed actuating means on said frame to actuate said lowspeed switch, f. trip means for operating said low-speed actuating means in accordance with a predetermined program, while said frame is moving toward a reversing station, g. emergency switch means on said frame operably connected to said motor drive means and said trigger circuit, h. emergency actuating means for actuating said emergency switch means only after said trip means has operated said low-speed actuating means, i. said emergency switch means, when actuated, being adapted to de-energize said motor drive means only while said speed control means is in its high-speed mode.
Claim 2
Dependent Claim 235 words
An emergency stop control apparatus for a cloth spreading machine having a frame supported for longitudinal movement over a cloth-laying surface between reversing stations, a spreader unit to spread cloth in layers, and means for supplying cloth to the spreader unit, comprising: a. electrically energized motor drive means for moving said frame longitudinally of said surface, b. electrical speed control means including selector switch means operable to switch said speed control means between a high-speed mode and a low-speed mode to energize said drive means to move said frame respectively at a high speed or a low speed, c. a trigger circuit including a low-speed switch, d. said trigger circuit beiNg operably connected to said selector switch means to operate said speed control means in said low-speed mode upon actuation of said low-speed switch, e. low-speed actuating means on said frame to actuate said lowspeed switch, f. trip means for operating said low-speed actuating means in accordance with a predetermined program, while said frame is moving toward a reversing station, g. emergency switch means on said frame operably connected to said motor drive means and said trigger circuit, h. emergency actuating means for actuating said emergency switch means only after said trip means has operated said low-speed actuating means, i. said emergency switch means, when actuated, being adapted to de-energize said motor drive means only while said speed control means is in its high-speed mode.
Claim 3
Dependent Claim 25 words
The invention according to claim 1 in which said trip means is adapted to successively operate said low-speed actuating means and said emergency actuating means.
Claim 4
Dependent Claim 52 words
The invention according to claim 2 in which said trip means is fixed relative to said cloth laying surface, and said emergency actuating means is mounted on said frame a predetermined distance trailing said low speed actuating means in alignment with said trip means as said frame moves longitudinally of said surface.
Claim 5
Dependent Claim 63 words
The invention according to claim 1 in which said trigger circuit generates an emergency voltage signal when said speed control means is in its high-speed mode and generates no emergency voltage signal when said speed control means is in its low speed mode, said emergency switch means, when actuated, being responsive only to said emergency voltage signal to de-energize said motor drive means.
Claim 6
Dependent Claim 55 words
The invention according to claim 1 further comprising electrical means for stopping the frame, said emergency switch means being operably connected to said electrical stopping means so that when said emergency switch means is actuated and while said speed control means is in its high-speed mode, said stopping means is energized to stop said frame.
Claim 7
Dependent Claim 80 words
The invention according to claim 1 further comprising reversing switch means adapted to control said motor drive means to reverse the movement of said frame, when actuated, between forward and reverse directions, said emergency switch means being operably connected to said reversing switch means so that when said emergency switch means is actuated and said speed control means is in its high-speed mode, said reversing switch means is actuated to stop said machine frame and assume a reverse directional mode.
Claim 8
Dependent Claim 43 words
The invention according to claim 6 in which said reversing switch means includes a field coil for said motor drive means, said reversing switch means being adapted to reverse the current through said field coil upon each actuation of said reversing switch means.

References Cited (Backward Citations)

US3344327A Cited
US3406320A Cited
US3443186A Cited
US3470431A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-17 1977-03-19 1977-09-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-17 1981-03-19 1981-09-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-17 1985-03-19 1985-09-18 $7700.00 Window Closed / Lapsed

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