USRE2928E - Robert w - Google Patents

Description

l @uitrit tutrs' @anni @Hirn ROB-ERT W. ANDREWS, CF STAFFORD, CONNECTICUT.

Letters Patent No. 9.549, 'dated January 18, 1853; extended-seven years; reissue No. 2,928, dated May l2, 1868'.

IMPROVEMENT IN OPERATING THE TREADLBS OF LOOMS.

TO ALL WHOM IT MAY CONCERN: A

Be itknown that I, ROBERT W. ANDREWS, oirStaHord, in the county of Tolland, and State of Connecticut, have invented certain yImprovements in Fewer-Looms; and I do hereby declare that the following is apfull and exact description thereof, reference being had to the accompanying drawings, making part of this specification-- Figure l being a front elevation oi' such partsofa power-loom as are necessary to exhibit my improvement and its action.. I Y

Figure 2, end elevation ofthe same, and

Figures 3 and 4 side views of a. cam and treadle in different relative positions.

Like letters designate corresponding parts in all `the figures.

The loom is operated by means of power applied to a pulley, A, on the main shaft C.- A shaft, B, situated below said shaft C, and driven thereby', through the cog-wheel a a', in turn drives, 'through bevel-'gear b b, a

shaft, c, on which the cams F F,*&c., are placed for. operating a series of. treadles, E E, tc., whose vibratory movements upon a common fulerum, al, operate the harnesses by means of linesl Z, 85o., passingI from their extremities m n around pulleys t k, die., at the bottom and top of the loom to said harnesses, in the usual manner'.

My invention consists partly in operating each treadle, E, by means of a mover, F, having two outwardly; acting cam surfaces, e, r, of unequal lengths, combined in one piece in such a manner that the position ofthe said movervupon its arbor can be reversed for the purpose of doubling its capacity for producing different movements and retentions of the treadle, substantially as hereinafter set forth, and partly in the arrangement of' the cam-wheels upon the outside of the loom-frame/with the levers hung nearly in the vertical plane of the series of cams or cam-Wheels.

The treadles will be moved positively, smoothly, uniformly; and gradually in both directions. Thepermutations in the figure of the fabric woven may be doubled without additional machinery, and the cams and treadles mayA occupy m'uch lessspnce than would be possible by any other means, in the manner hereinafter fully-set forth.

Each treadle is curved so as to embrace its mover, shown in igs. 3 and 4,) and has on the inner periphery of said curved -portion two projections or shoes, hz', whose central points are located on opposite sides of and 'in the same line with the centre of the cam-shaft c, and against which the cam-surfaces of the mover act in vibrating the treadle'. Each mover has a central hub, f, ofthe required thickness, and two cam-plates, e r, outside of thc same, cach being of one-half the thickness of thehub, and both firmly united or forming one solid piece, theouter pcripheries of which plates are ofthe same radius, and respectively act against the shoes i z' of the treadle. TheI plate r forms nearly an entire disk, having only n, gappiin its periphery, of sufficient i width to receive its shoe during the time that the plate e, which is of small extent, is acting against its shoe. The

unequal sizes of the cam-plates, as shown in the drawings, ,and described above, cause the trea-dle to remain at onc'limit of its vibration longer than atthe other; but their relative sizes may be varied at pleasure. They are so arranged, inl reference to one another and the shoes of the trcadle, that, at the moment when one commences the other begins to lessen its action on its shoe, so that one or the other is incessantly operating to draw or keep thc treadle in one or the opposite direction, each during a relative length of time proportional to the length of its outer periphery. v l

As represented in figs. 3 and 4, the small cam-surface e actuates the s hoe h, and the large cam-surface r actuates the shoe if, but both the movers are so constructed that they may be reversed upon their shaft, the cams then operating exactly in the same manner, except that, when so reversed, neither cam-surface acts on the same shoe as before, whereby t-lie movement ofthe treadle is reversed, and a new figure ofthe fabric woven Produced. .l l

This capability of being reversed without'adjustment s'peculiar to my double cam-mover and treadle, not being possessed by any others known to me. I l

A gap in the curved portion of each treadle, above and between the shoes 7i t', wide enough to admit the mover, enables me to reverse the position ofeither mover or treadle without detacliing or disturbing the other movers or treadles. Sets of nger-guides, s and t, embrace respectively the several shoes 7L and 'iof all the treadles, and hold them precisely opposite their respective cam-plates. I

This arrangement also,4 enables me to constructfthe treadles and movers very thin, and thus greatly economize the space which they occupy. Each treadle and its shoes may be of the thickness of each cam-plate of a mover, and one of the shoes be slightly ecurved, sothat the finger-guides s will bring both shoes opposite their respective cam-surfaces of the mover, or each treadle may have the same thickness as the mover, and cach shoe one-half the thickness thereof. I usually employ the former method, as simpler and otherwise preferable.

Each mover may he placed at any angle on the c'anlshaft c,` so that by the permutations of their positions, almost an endless variety of figures may be produced in the fabric woven.` The central aperture of cach cammover may b smooth, and turn freely on the shaft when not tightened thereon; -but I prefer to have it grooved,

(as-shown in gs. 3 and 4,) one of which grooves will always fit over n. longitudinal ridge on the shaft, and thereby prevent the possibility of the mover turning from its position. They are all tightened in contact with one another on the cam-shaft, hy nuts gg, (fig. 2,) which are screwed 4irmly against the two outer movers.

" In cam-looms of this classes heretofore constructed, the` cams have been arranged within the loom-frame,

and the levers on the outer side thereof, the connections of the levers ivith the cams being effected through arms projecting from the levers.`

In myconstruction I place the cams on the outer side of the frame, and hang the levers in vertical line therewith, thereby not only bringing these parts intomore compact position, but enabling the cams and lovers to relatively Work to much hetter'adrantage.

I claim the combination in a. loom -of theharnesslframes and cords with the treadlcs and treadlecams, constructed and operating ,substantiallyasdescribed;

Also the treadles and the movers or'cams, combined, constructed, and arranged so that by reversal of the cams upon the shaft, a reversal of the movements andV retentions of the harness-frames is produced, snhstantially, as herein set forth.

Also in a cam-loom having upright treadles or harness-levers strung to the harness-leaves or frames, and

actuated by n. singleset ofAcam-wheels, the arrangement of the fulcrum-shaft of the harness-levers directly over or within the vertical plane ofthe camwheels, substantially .as described.

ROBERT W. ANDREWS. y

Witnesses:

JOSEPH HYDE, H. E. .CHAMBERLIN

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