Improvement relating to Tension-devices for Spindle-bands of Spinning-jacks, Twisting-machines, and the like.
Year: 1892

page_text: Date of Application, 25th Apr., 1892-Accepted, 28th May, 1892
COMPLETE SPECIFICATION.
Improvement relating to Tension-devices for Spindle-bands of
Spinning-jacks, Twisting-machines, and the like.
I, THOMAS WALKER, of Warren, Maine, U.S.A. Inventor, do hereby declare
the nature of this invention, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My invention is an improvement in tension devices for the spindle-bands of
spinning-jacks, twisting-machines, and the like. The object of said tension devices
being to ensure an even tension on each spindle, without regard to the number the
band operates.
The object of this invention is to provide a better form of guide for the pulley-.
block, as will be hereinafter set forth and claimed.
The invention is illustrated in the accompanying drawings, in which-
Figure 1 is a plan view, and Fig. 2 is a section on line of Fig. 1.
In the drawings, A represents in general form the spinning-jack, or so much
thereof as is necessary to illustrate my invention, and a indicates the spindles.
On the drum B is wound a band, the loops of which pass alternately around the
pulleys a¹ of spindles a and the drum B, and at each end of the drum the band
passes back to a guide-pulley c. The tension device is applied to the loop between
these two guide-pulleys c. Its general form is that of a pulley mounted in a
block, which slides on an inclined guide.
Heretofore in spinning-machines the guide consisted of an upper and lower
bar longitudinally slotted and the block which carried the pulley was provided
with projections entering the slots, whereby the block was guided in its up-and-
down movement on the ways. The bands require delicate tensions and consequently
easy and uniform movement of the block and pulley. The double and slotted bars
afford a large surface to catch the lint, which tends to obstruct the free and easy
movement of the block and at the same time are more expensive to make, and if
cast add materially to the weight of the jack on which they are carried.
In order to furnish a simpler and less clumsy guide, having less exposed surface,
and at the same time by very simple and inexpensive means provide stops for the
sliding block at the upper and lower limits of its movement, I form the guide of a
single plain bar D. This is bent at its upper and lower ends to form upper and
lower supporting-brackets e, the ends of which are fixed to the frame of the jack.
Upon this bar is placed a block F, carrying a pulley G. The block has a longi-
tudinal slot fitted to the bar, so as to slide freely thereon. The block may
be made of wood or metal, and is provided with a plate underneath, which
holds the block to the bar. It has also an upper plate y, between which and the
upper surface of the block the pulley is pivoted. The loop in the band passes
around the pulley. In this form the apparatus may be made light enough to meet
the requirements of any size of jack. The body of the block may be made of
wood and the upper and lower plates of sheet metal, and thus may be made very
light. With this device it has been found by actual experiment that weight of the
block keeps the tension on each spindle always the same without regard to the
number the band operates.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:

page_text: inclined position on the jack and carrying the sliding-block, substantially as
described.
W. H. MUNNS,
Applicant's Agent.