US69711A - Improvement in looms - Google Patents

Description

'LEVI SCOFIELD, oF FARMiNG'roN, WISCONSIN,` AssiGNoR. To HIMSELF i Y AND JUSTINB. WAIT, OF THE SAM-E PLACE.

vLaien Pittem No'. 69,711, dates october s, 1867.

IMPROVEMENT IN LOOMS.

TO ALL WHOM IT MAY CGNCERN:

Be it knoyvn that I, LEVI SCOFIELD, oflFarmington, Jeffersoncounty, in the State of Wisconsin, have invented a new and useful Improvement in Looms; and I do' hereby declare that the following is afull and exactdescription thereof, reference being had to the accompanying drawings, making a part of this specification, in which-.- l Figure 1 is a top'vietv. i l s Figure 2 is a back vview or elevation.

Figure 3 is an end view or elevation.

Figure 4 is a view from the front of some' of the inner: parts of my loom.

Figure 5A is similar to iig. 2, but showing the treadle and operating mechanism in a different position; and

Figures 6`and 7 are detail drawings, showing the operation of .the cam-shaft;

The nature of my invention consists in the speciiic construction andarrangement of the operating mechanism of harnesses and trendles of looms, whereby the same are uniformly and eiiiciently operated, substantially as hereinafter described. i I

To'enable others skilled in the art'to make and use my invention, I will proceed to-describe its construction and operation.

i I provide my loom with a suitable support or framework, D D E I, and theV ordinary appendages, as the hand-rail A, shuttle-box B, lay or hatten B, hatten-arms B3, girt--connecting ,hatten-arms' B2, picker-stati' C, picker-swivels F, picker-levers K and K', treadles L, stepping-bar H, guides P P for stepping-bar, arms T attached to batten-arms,and connecting-links U,rfor operating stepping-bar; rack m, cam-shaft R, cams a a a2 as,

harness J J', and shuttles, beams, and other parts not` shown. The sliding bar S vWorks on the outer face of the back girt G, and is retained in position by the clasps g. The double cams t n, on the cam-shaft R work against the arms b b of the sliding bar S, While` the .legs d of the bar' S strike the treadle L. The arm b isset out from the bar so as to cause the cam t to 'Work against it, and the cam n against the arm b, as shown.' The rack m, secured to the stepping-bar, is kept in position by the guide 1o, figs. 1 and 2, and works in the pinion e that plays loosely upon the cam-shaft R. 0n the cam-shaft, immediately in front of the pinion e, is keyed a c ratchet pinion, or the shaft itself may be made ratchet-faced, .as shown at e. Upon this ratchet-face works the gravitating dog or pawl d, figs. 1, 6, and?, that is pivoted on a spur ofthe pinion e, as shovjvn. To prevent themomentum of the cam-shaft R from carrying the cams a al a2 ar beyond the proper ystopping point, and so, by carrying up one of the cams to meet the descending harness,V preventing the full downward movement of the latter, and. a full shed of the warp, (a difficulty hitherto frequently met,) I attach to the forward face of the ltepping-'bar H a hunting or stop-lever, f, figs. 1 and 4, that at the proper time, owing to the movement of the stepping-bar, is interposed to stop'the cams in the desired position, and then is again withdrawn when it is desirable the cam-shaft should revolve. By driving the hatten, hatten-arms, &c.,backward to the position shown by dotted lines in figr the'forward ends of the levers T are driven down, as shown by dotted lines in the same igure,.carrying with them (by means of the connecting-links U) the stepping-har H that in turn drives down both the treadle L and the rack m. This downward movement of the rack revolves the pinion e and carries up the gravitating dogd to the position shown in iig. 7, the latter sliding over the ratchet c. The end of the treadle moving down strikes or carries down the horizontal endofwhe picker lever K', (as shown in ligt 2,) and so, by means of the strap O and the picker-stati' C, operating the shuttle in one direction. By returning the hatten, batten-arms, &c., to the first position the stepping-bar is raised, carrying up with it the rack m and the, treadle L. The rack moving up causes (by means of the pawl'd and ratchet e) the shaft .R to make one-fourth of a revolution, thereby, by means of the cams a a1 a? a3, operating the harnesses J andJ, and by means ,of the cam h. and sliding bar S swinging the treadle L (pivoted tothe treadleswivel M) to the right or opposite `side eE-the loom, as shown in iig. 5. Driving the hatten, hatten-arms, lite., again backward, the rack and treadle are again driven down, theraok revolving the pinion aand carrying up the pawl d, as before, while the treadle this time strikes andjcarries down the horizontal -end of the picker-lever K and operates the other picker-staff` C, so driving the shuttle in the opposite direction or returning it to itaiirst position. Again returning the hatten, hatten` arms, c., to their rst position, the rack m is again driven up and the camfsha'ft revolved, operating again the for the purpose set forth.

nam Q harnesses, and, by means of the cam n and sliding-bar, swinging the treadle again to the left, as shown in fig. 2. The downward movement of the stepping-bar H not only operates the treadle and shuttle but removes the stopbarf from its position in front of the cams a al a2 and a3, as shown by dotted lines in iig. 4, while the return upward movement of the stepping-bar not only revolves the shaft R so as to bring down another of the cams a al aL and a3, but interposes in front of' it at the end of its desired movement the stop-barf, thereby preventing the cam from passing farther, and closing the shed of the warp. It will be seen that after the sliding bar has been operated to the right by the cam h working against the arm b the sliding-bar is prevented from passing farther in that direction than it is driven by the cam by the arm b striking the side of the cam n, and that, after the sliding bar has been operated tothe left by the cam n working against the arm b, the sliding-bar is prevented from passing farther in that direction, also by the arm b striking against the side of the cam h, thereby holding it (the sliding bar) securely during the pauses in its necessary movements, or while the shuttle is being thrown.

What I claim, and for which I desire Letters Patent, ism

l. The stop-bar f, when attached to the stepping-bar H, and used to stop the cams a al a2 and a3 alternately, thereby preventing the momentum ofthe eem-shaft from carrying up too far one ofthe cams that in turn would prevent the descent of the harness and a full shed of the warp, substantially as described.

2. The sliding bar S, when constructed with the arms b and b', the arm b set out from the face of the bar so as to allow the cam n to work against the arm and the cam h against the arm b, and used to operate the treadle L, substantially as end for the purpose set forth.

3. The double cams h and n, when attached to the cam-shaft R, and used to operate the sliding bar S, and at the same time holding the latter and the treadle in position while the shuttle is thrown, substantially as and LEYI sooFIELD.

Witnesses:

S. D. Locus, G. H. WILLrsroN.

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