US416177A - George mitchell and thomas hargreaves - Google Patents

Description

No Model.)

G. MITCHELL & T. HARGB-EAVES.

SPINDLE DRIVING DEVICE FOR SPINNING MACHINES.

No. 416,177. Patented Dec, 8, 1889.

276,47. F/si2.

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UNITED STATES PATENT OFFICE- GEORGE MITCHELL AND THOMAS HARGREAVES, OF BRADFORD, COUNTY OF YORK, ENGLAND.

SPlNDLE-DRIVING DEVICE FOR SPINNING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 416,177, dated December 3, 1889.

Application filed March 18, 1889. Serial No. 803,924- (No model.) Patented in England August 7, 1888, No. 11,378.

To aZZ whom it may concern I 7 Be it known that we, GEORGE MITCHELL and THOMAS I-IARcREAvEs, subjects of the Queen of Great Britain and Ireland, re siding at Bradford, in the county of York, England, have invented certain new and use ful Improvements in spindle Drivin gDevices for Spinning-Machines, (for which we have obtained Letters Patent in England; No; 11,378, dated August 7, 1888;) and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention is specially applicable to slubbing and roving boxes and similar machines in which tension pulleys are used; and its object is to drive the spindles in such a manner that they revolve with less vibration, at a more uniform speed, and with less tension 011 the driving-bandsg also, to twist the fiber with greater regularity and to drive the machine with less power than hitherto.

\Ve accomplish our object in the following manner: The cylinder or pulleys on the driving-shaft of the machine is or are of the ordinary description. The whirls or pulleys on the spindles are each cut with. two grooves on the circumference, in which the bands are placed, one band driving a pair of spindles. Each driving-band from the cylinder or driving-pulley passes round a spindlewhirl twice, thus obtaining; more frictional contact between the driving-band and whirl, at the same time tending to press the spindles toward each other, thereby steadying them. Each band after leaving the whirls passes over the cylinder or another pulley on the driving-shaft and over a friction or tension pulley mounted in the ordinary manner.

In order that our invention may be fully understood, we proceed to describe it with reference to the drawings annexed, in which- Figure 1 represents a transverse sectional elevation, and 2 a front view, of a portion of a slubbing o1 roving box, and Fig. a plan of a portion of a machine to which our improvements are applied.

A is the driving cylinder or pulleys.

B is the tension-pulley.

G and D are a pair of spindles, each carrying double-grooved whirls, the grooves of which are marked E F G H. The drivingband J passes from the under side of the driving-cylinder or pulley into the groove E of one spindle, thence round the groove G of the other spindle, thence round the groove of the first spindle, and thence to the groove II of the other or second spindle, thence to the upper side of a driving-pulley A, or the driving cylinder, as the case may be, and round it to the tension-pulley B, round which it passes to the driving-pulley A, or the driving-cylinder at the starting-point.

It will be understood that the driving-pulley, cylinder, tension pulley, and doublegrooved whirls are all severally old; but our arrangement is such as to permit of the driving-band J being passed from and to the driving pulley or cylinder and round and round the whirls of the spindles as often as may be desired; hence the whirls may with the same arrangement be treble or 1nultiple grooved in cases where more drivingfriction is required; but we have found that with double grooved whirls arranged as shown the frictional contact is so much increased and the retarding friction so much diminished that a machine containing fifteen pairs of spindles may be easily turned by hand. By obtaining the increased frictional contact, as described, the spindles'are run at a more uniform rate, thereby twisting the fiber with greater regularity and at the same time requiring less tension on the band, so that the weight W on the tension-pulley-frame arm does not require to be so heavy or the ordinary weight have to be placed so far from the fulcrum-shaft S as when the driving-bands pass round the whirls in the ordinary manner.

Vhat we claim is 1. The combination, with the driving cylinder or pulleys A, spindles each having a whirl with two or more grooves out therein, and the ten sion-pulley, of the driving-band. J, passing around the groove E in one whirl, thence round groove G of the other whirl, back to another groove in the first whirl, thence to another groove in the second whirl, thence over the cylinder or a driving -pulley A, pulleys A, substantially as and for the puraround tension-pulley B, to the starting-point, pose described. substantially as and forthe purpose described. In testimony whereof we have signed our 2. The combination of the driving cylinder names to this specification in the presence of 15 5 or pulleys A and two spindles, each having a two subscribing witnesses.

whirl thereon cut with two or more grooves,

with the driving-band J, passing two or more GEORGE MITCHELL.

times around the whirls of both spindles in THOMAS HARGREAVES. the different grooves thereof, as described, lVitnesses:

m and tension-pulley B, engaging a loop of said JNO. GILL,

band extending from the driving cylinder or M. PREST.

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