US871278A - Brake mechanism for loom warp-beams. - Google Patents

Description

No. 871,278. PATENTED NOV. I9, 1907.

F. JOHNSON. BRAKE MECHANISM FOR LOOM WARP BEAMS.

APPLICATION FILED FEB. 26, 1907.

A TTORNE Y FRANK JOHNSON, OF NEW YORK, N. Y.

Specification of Letters Patent.

BRAKE MECHANISMEFORQLOOMgWARP-BEAMS.

Patented Nov. 19, 1907'.

Application filed February 26. 1907. Serial No. 359.357.

T o-all whom it may concern:

Be it known that I, FRANK JOHNSON, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Brake Mechanism for Loom Warp-Beams, of which the following is a specification.

The invention relates more particularly to looms for weaving Wire fabrics and to the let-off mechanism for such looms.

The object of the invention is to provide simple and positively-acting brake mechanism for automatically lettingoif a prede termined length of warp-wires at proper intervals.

The invention consists in certain novel features and details of construction by which the above object is attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show a preferred form of the invention as applied to a loom, with so much of the feed and weaving mechanism as is necessary to show the relation of the invention thereto.

Figure 1 is a side elevation of a loom equipped with the improved brake. Fig. 2 is an elevation of the opposite side. Fig. 3

is a vertical section partly in elevation showing the controlling means for the let-oif mechanism. Fig. 4 is a faceview of a portion shown in the preceding figure. Fig. 5 is a diagram showing the electric circuit.

Similar letters of reference indicate the same parts in all the figures.

A A are the side-frames of the loom, and B is the batten or lay swung from centers B B at the top of the frames and equipped with a reed and shuttle-throwing means, not shown, but which may be understood to be similar to that described in Letters Patent to me dated A ril 12, 1904, No. 757,121. The lay is causec to swing by double cams E carried on the main shaft E and makes two boats or oscillations to each pick, as in the above patent.

At one end of the shaft E is a bevel gearwheel E meshing with a similar wheel F on the upper end of an inclined shaft F carrying at its lower end a smaller beveled gear- WheelF in mesh with a similar wheel G on a horizontal shaft G extending transversely of the loom parallel with and in rear of the main shaft E and revolving at the same rate.

J is a controller or commutator carried on the projecting end of the shaft G, consisting of a circular disk of metal insulated from the shaft and having a spring contact-piece J on its outer face adapted. to make wiping contact with a fixed contact-point K carried on an arm A of the frame, and connected to a binding-post K. Another fixed arm A carries a spring J in continuous wiping contact with the inner face of the disk and serves to complete an electric circuit through the latter and any electric devices connected to the binding-post K. The circuit is shown in Fig. 5.

The warp-beam is marked C and carries the warp-wires as usual. It has a drum 0 at one end partially encircled by a brake-strap or shoe C attached to a bltliO-lQVOl C held by a weight C in position to hold the drum and warp-beam against revolving, and raised to release the warp-beam by the action of a solenoid M fixed to the frame, and receiving a core M attached to the brake-lever.

The solenoid is in the circuit and when the latter is completed through the spring contact-piece, is energized during such short period of contact and draws in its core M to lift the brake-lever and permit a short length of warp-wires to be drawn oif. The warpwires are led over a guide-roller I) having at one end a pinion l) in mesh with a gearwheel on the warp-beam so as to revolve therewith and at the other a worm-wheel I) engaged by a worm l) rotated to turn the guide-roller and warp-beam by any suitable feed-mechanism, which may be understood for the purposes of this description to be operated electrically.

The warp-wires are led from the inner face of the warp-bcam upwardly beneath and partially around the outer face of'thc guideroller so that the opposite rotation of the beam and roller due to their gear and pinion tends to move them in the same direction as the travel of the warpvires thereovcr.

The electric feeding-device for the worm D is only partially shown D' is a ratchetwheel on the end of the wormshaft, engaged by a pawl, not shown, actuated by connections from a bent-lever l which 13 oscillated by the movement of an armature N toward the cores of an electrmmagnet N energized by the current through the binding-post K and forming part of the circuit.

The binding-post K is set in a concentrically curved slot a in the arm A so that it may be adjusted in the path of the springcontact J and the action of the brake and feed mechanisms accurately timed relatively to the movements of the heddles and lay.

Although I have described the brake as released by the action of a solenoid, and the worm as actuated by an electromagnet, it will be understood that the electric energy may be utilized in either of these forms in either or both situations, or the feed mechanism may be otherwise operated if preferred;

and the brake may serve with looms of other types than the wire loom shown.

I claim In a loom of the'character set forth, a warp-beam, a brake thereon, an electrically actuated releasing-means for said brake, an electric circuit in which said releasing-means is located, and a controller operated by a moving portion of the loom for making and breaking said circuit.

In testimony that I claim the invention above set forth I afliX my signature, in pres ence of two witnesses.

FRANK JOHNSON. Witnesses:

CHARLES R. SEARLE,

M. A. BOND. -..4 v

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