US142925A - Improvement in electrical stops for looms - Google Patents

Description

G. F. LUFBERY.

Electrical Stops for Looms, M1.

N0. 142,925. Patented September 16,1873.

NI'IED STATES PATENT OFFICE.

IMPROVEMENT lN ELECTRlCAL STOPS FOR LOOMS, 80c.

- Specifioatioii forming part of Letters Patent No. 142,995, dated September 16, 1873; application filed May 1, 1873.

To all whom itmay concern.-

Be it known that I, GEORGE FREEMAN LUFBEBY, of Montargis Department of Loiret, France, have invented a system or device for throwing out of gear stockinet or other machines, of which the following is a speciiication:

My invention consists of a stop-motion for looms, orknitting or other machines, in which an electric current is made the means of stopping the machine when a knot occurs in a thread, the latter is broken, a needle becomes bent, or other part is disarranged.

The invention isrepresented in the drawing as applied to an ordinary ,stockinet-machine, the construction which is too well known to need either description or illustration of any parts other than those'with "which the improved stop-motion is directly connected. v Each thread of the machine, after it leaves.

the bobbin, or warp-beam, passes between the diverging arms of a split bar, 2, thence over a friction-pad, l, of rubber or its equivalent, and over a guide, a. A bent wire or yokefi is hung uponthe thread between the points i) c, the ends of the wire extending into cells 9 g", each of which is partly-filled with mercury, and is connected'by a wire to one of the poles of a battery. Should the thread break or the bobbin become empty, the wire f, no longer supported, will fall and establish a communication between the two cells'and complete the electric circuit, causing the application of a break, and throwin the driving-shaft out of gear, as descri hereafter. Should there be a knot in the thread it will prevent the passage of the same through the split standard 2, so that it will-break and cause the completion of the circuit, as just described. To the guide bara is secured a tame, on which are supported two small'rcckshafts,' u u, having projections c 1:, between which there is space just suflic'ient to permit (Land, E E arms of a toggle-joint connected at one end to the frame 0 and at the other to a strip,P, jointed to any stationary part of the machine. A rod, F, is connected to the center of the toggle-joint and to a trip-lever, G, from the other end of which is suspended a "blade, Q. .A catch, L, arranged tosupport the outer end of the lever G in an elevated position is also the keeper of an electromagnet, K, to which the wires leading from the cells 9 g and plates. 6 l are connected. A spring, M,- tends to draw together the strip 1 and frame 0, and isretracted when the joint is in a horizcntal'posit-iom-the lever G and plate Q are elevated, and the pulley B, operated from the driving-shaft. is iu'i'rictional contact with the pulley A.

When, however, on the breaking of a thread, bending'of a needle, ordisarranging of any important'pa'rt-of the machine, the magnet K becomes active, the keeper is drawn back, and the lever G falls until the plate Q is grasped between'the pulleys B B, by which it will be drawn farther downward until the toggle-joint is raised sufliciently to permit the spring M to draw back the frame 0, a spri l v N, draw ing forward the strip P, and maintaining the pulleys B A in contact-until the blade Q is well depressed. When the frame 0 is drawn back the periphery of the pulley B- is brought in frictional contact with the recessed shoe H, by which the further'rotatioh is arrested.

When the pulleys A B are in frictional contact, a plate, W, on the frame 0 is in contact with a plate, X, and maintains the circuit, the latter being broken when the motion of the machine is arrested, so as to'prevent wasteof material inthc battery.

It willalso be apparent that the stoppirg mechanism described and illustrated in Fig,

5 may be applied to various machines and apparatus.

I claim- 1. The combination, in a. knitting-machine or loom, of a series of wire yokes, f, each hung upon a thread above the separated mercurycups 9 g, forming part of a' circuit, which is completed upon the descent of the yoke, as set forth.

2. The combination of the split bars z, cells 9 g, and yokes j, supported by threads above the cells, as specified.

3.-The combination, with the needles or other part ofthe machine of a lever or levers so arranged as to be strucir by such part when out of position, and to complete or break an electric current, as specified.

4. The combination, with the pulleyA, of the drivingpulley B, the lever G, supported by the keeper L. of a magnet, and devices de' scribed, or their equivalents, by which the pul' -leys are separated on the movementof the keeper.

In testimony whereof I have signed my name to this specification in the presence of two subscribjn g witnesses.

' GEO. F. LUFBERY.

Witnesses A. DELINE,

EMILE RICHARD.

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