Abstract A variable speed card drive for varying the speed of feed and doffing components from zero to a creep speed suitable for carrying out maintenance operations, such as putting up an end of sliver, to a predetermined operating speed, includes a variable speed mechanism, a movable control arm for controlling the output speed of the variable speed mechanism, and an assembly having a pair of fluid operated cylinders and piston rods connected to the control arm for progressively positioning the control arm in a first position responsive to the action of one of the cylinders for achieving the creep speed, and in a second position responsive to the action of the other cylinder for achieving operating speed so that the card components may be slowly accelerated to creep speed and, following servicing of the carding machine, to operating speed.
For use in a carding machine and the like having means for feeding fibers to a main cylinder and means for doffing fibers from the main cylinder in the form of a web, a drive mechanism controlling the speed of each of said means comprising: A. a frame; B. a drive including variable speed mechanism carried by said frame for driving connection to said feeding means and said doffing means for accelerating said feeding means and said doffing to a predetermined creep speed at a predetermined rate for driving same at a predetermined operating speed; C. a movable control arm controlling the output speed of said variable speed mechanism; and D. first and second aligned fluid operated cylinder and piston assemblies having cylinders rigidly connected to each other, said first assembly being pivoted with respect to said control arm and said second assembly being pivoted with respect to said frame, for progressively positioning said control arm in a first position responsive to the action of one of said cylinders for achieving said creep speed and in a second position responsive to the action of the other of said cylinders for achieving operating speed; E. whereby said feeding means and doffing means may be slowly accelerated to creep speed and following servicing of the carding machine to operating speed.
Claim 2
Dependent Claim
218 words
For use in a carding machine and the like having means for feeding fibers to a main cylinder and means for doffing fibers from the main cylinder in the form of a web, a drive mechanism controlling the speed of each of said means comprising: A. a frame; B. a drive including variable speed mechanism carried by said frame for driving connection to said feeding means and said doffing means for accelerating said feeding means and said doffing to a predetermined creep speed at a predetermined rate for driving same at a predetermined operating speed; C. a movable control arm controlling the output speed of said variable speed mechanism; and D. first and second aligned fluid operated cylinder and piston assemblies having cylinders rigidly connected to each other, said first assembly being pivoted with respect to said control arm and said second assembly being pivoted with respect to said frame, for progressively positioning said control arm in a first position responsive to the action of one of said cylinders for achieving said creep speed and in a second position responsive to the action of the other of said cylinders for achieving operating speed; E. whereby said feeding means and doffing means may be slowly accelerated to creep speed and following servicing of the carding machine to operating speed.
Claim 3
Dependent Claim
33 words
The structure set forth in claim 1, wherein said cylinders are double-acting and including, a valve means progressively controlling the actions of said cylinders and adjustable stop means limiting movement of said arm.