USRE5905E - Improvement in hemp-hatcheling machines - Google Patents

Description

G. W. PITTMAN.

Hemp-Hatcheling Machines.

` Reissuved June 2,1874.

M i Y N w UNITED STATES PATENT OEEIOE GEORGE w. PITTMAN, OE BROOKLYN, NEw YORK, AssiGNOR, EY MESNE ASSIGNMENTS, To SAMUEL i. THURSRY AND TEE TODD AND RAEEERTY MAOHINE COMPANY.

IMPROVEMENT INv HEMP-HATCHELING MACHINES.

Specification forming part of Letters Patent No. 116,092., dated June 20, 1871,' reissue No. 5,905,V dated June 2,1874; application filed May 11,1874.

To all whom 'it may concern Be it known that I, GEORGE W. PITTMAN, of Brooklyn, Kings county, State of N ew York, have invented certain Improvements in Machines for Hatchelin g and Drawing Hemp, &c., of Which the following is a speciiication:

In hatcheling hemp, the hank or mass ot' ber isusually cleaned and drawn out by hand upon a stationary comb, and then wound upon a cylinder called a lapper, from which it is taken off by hand, still iii the form of a hank. Eii'orts have heretofore been made to devise machinery for these operations capable of delivering the liber in a sliver instead of a hank. For this purpose machines have been xmade for subjecting fiber to the action of belts of gill-bars. Cylinders containing gill-bars have been employed in connectionwith feeding and delivery rollers. Such machines have not proved successful, because of their liability to get out of order, and the inefficiency of their action in openin g and combing the bers sufciently for the purpose required.

My invention relates to that class of hatchelers in which are employed two combing-cylinders revolving with diti'erent velocities, and actin g .in combination with friction-rollers, the cylinders, respectively, and the friction-rollers, being arranged to revolve with successive increments of speed, so as to subject a haiik or mass of fibers fed into the machine to a series of drawing and combing processes in a single continuous operation, whereby the fibers composing the hank are eii'ectually straightened and drawn out preparatory to their discharge from the machine through a suitablyarranged guiding-trough and delivery-rollers in the form of a continuous sliver or roving suitable for use in the manufacture of rope, cordage, Ste. My invention consists in providing the secondary' or quicker-moving cylin der with rows 'of inclined teeth instead of the radial teeth heretofore used, by` which means the eonjunctive action of the comb-cylinders is greatly improved in efliciency, and the sliver is more easily and certainly withdrawn by the delivery-rollers.

y a and a', which may The accompanyingdrawings.are as follows! Figure l, a vertical section of my machine; and Fig. 2, a plan of the same.

A stout frame, A, furnishes bearings for the slower movin g cOinb-cylinder b, provided with rows of'pointed teeth projecting radially from its periphery, and the quicker-moving cylinder c, provided with rows of inclined teeth. A pair of friction-rollers, c and e', are mounted in suitable relation to the quicker moving or second comb-cylinder, and revolve with sufiicient velocity to enable them to act in drawing the bers therefrom and discharging them into a converging trough, d, by which they are guided to the grooved delivery-rollers or sliverrollers f and f. The upper rollers e and f are, respectively, mounted in swinging bearings g and h, so that they may be lifted by means of the bars 7c and l, or weighted, if required, to enable them to exert the necessary downward pressure. At the opposite end of the machine is another pair of friction-rollers, be used when required for regulating the feeding of the hank of iibers which is `to be operated upon. The friction-rollers and the combing-cylinders are to be driven at their proper relative speeds by suitable belts and pulleys or trains of gear. The feed-rollers a. and ci are used when it is required to hold back the haiik and increase the drawing e'ect of the iirst comb-cylinder b. In some cases the feed-rollers may be dispensed with, the` weight of the fibers, andtheir friction in moving across the guide-board a2, aiiording sufficient resistance to the preliminary pulling operation ei'eoted by the initial penetration into them ofthe radial comb-teeth. The comb-cylinder b holds back the fibers from the inclined comb-teeth, andthe rotation of the second cylinder, therefore, effects a second pulling operation. By this means the radialcomb-teeth are made to comb and straighten the libe-rs, y

and at thesanie time the holding back of the hank by the first comb-cylinder causes the inclined teeth to produce a like effect in their initial action upon the fibers. The inclination of the teeth in the secondary cylinder both causes them to penetrate the hanl; easily and quickly, and thus instantly and completelyT engage the fibers, so as to pull them from the primary cylinder, and also facilitates the disengagement of the mass of ibers from the secondary cylinder. The friction-rollers e and e engage the fibers as they pass from the second comb-cylinder7 and revolve with such velocity as to subject them to a .third pulling operation7 and a final combing and straighten- .ing by the inclined teeth.

It will thus be seen that my machine performs several pulling or drawing and combing operations successively. This series of continuous processes effectually straightens out the fibers, and causes them to be delivered by means of the guiding-trough and groovcd rollers in the form of a continuous sliver.

The attenuation of the hanl; by these combing and pulling proccssesis thus eiected Without the risk of the bers being knotted or delivered in masses, as in the gill-bar machines hereinbefore mentioned.

I claim- The cylinder b armed with pointed radial teeth7 and the cylinder c armed with pointed inclined teeth7 the latter revolving at a quicker speed than' the former, so as to comb and draw the ber, in combination with drawing-rollers e e revolving at a still quicker speed, substantially as and for the purpose specified.

GEO. W. PITTMAN.

/Vitnesses:

J. C. TODD, Jol-IN G. UARNEY.

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