US173888A - Improvement in electro-magnetic stop-motions for drawing or roving machinery - Google Patents

Description

E. 30mm: 2. G. H. PILLSBURY. ELECTRO-MAGNETIC STOP-MOTION FUR. DRAWING 0R ROVING MACHINERY. '3 Patented Feb. 22, ms.

Fig.7. Fl y-a IUI H a mun: rllimlvi W: 6* GD "lilllilllmm H5551: w

ILFEIERS, PHOTO-UTHOGRAPHER. WASH NGTON D C UNITED STATES I PATENT OFFiCE.

ERASTUS BOYDEN AND GEORGE H. PILLSBURY, OF LOWELL, MASS.

lMPROVEMENT IN ELECTRO-MAGNETIC STOP-MDTIONS FOR DRAWING 0R ROVING MACHINERY,

Specification forming part of Letters Patent No. [73,888, dated February 22, 1876; application filed January 12, 1876.

To all whom it may concern Be it known that we, ERASTUS BOYDEN HINIYGEORGE H. PILLSBURY, of Lowell, of the county of Middlesex and State of Mass 1- chusetts, have invented an Electro-Magnetic Stop-Motion for Machinery for the. Manufacture of Drawing or Roving; and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawings, of which- Figure 1 denotes a front elevation, Fig. 2 an end View, Fig. 3 a top view, and Fig. 4 a longitudinal and horizontal section, of our stop-motion.

in carrying out our invention, as shown in the drawings, we make use of an electro-magnet, its armature, and circuit-Wires, which we combine with the roving or drawing guide, and with a latching apparatus of a shipper; the

whole being so that whenever the roving or drawing, may become broken or run out, the guide shall rise and close the circuit, and

thereby cause the magnet to attract and move to close the circuit during the advance of the shipper.' When the guide is depressed and the shipper advanced, the circuit becomes open or broken, and the armature falls away from the magnet, to aid in efi'ecting the latching of the shipper.

In the drawings, the shipper is shown at A as arranged to slide rectilinearly through guides to a, extending from a support-piece, '1, such shipper being provided with a spring, B, for retracting it or forcing it backward, to cause it, when in use, to move the drivingbelt from the fast to the loose pulley of the roving or drawing frame or machine. There is also applied to the said shipper a springlatch, vO, formed as shown, to catch upon the shorter arm of a bent lever, 1), arranged as represented. Over the end of the longer arm of the bent lever is a stud, b, which projects rearward from a gravitating lever or trigger, E, shaped as shown, the shorter arm a ct .which is heavier than the longer arm (1 of it. This trigger is pivoted in a bracket, 0, .its longer arm being extended a short distance underneath the end of a pendulous armature, F, of an electro magnet, G. The armature stands nearly vertical, and turns on a pin, f, projecting from a plate, g. Furthermore, there extends from the upper part of the armature, and over the electro-magnet, a weight or arm, h, \vhich serves tothrowthe armature Otf the magnet whenever the circuit is broken,

being determined by a stop, 1', underneath the arm IL. The roving or drawing guide is shown at H, in the form of a furcated bent lever, having its fulcrum at It. The unfurcated arm of the lever is the heavier, and has a small wire, 1, extended from it, to operate with an anvil, m, connected with one extremity of the electromagnetic circuit-wire n, the other circuit-wire, 0, being extended from a stationary metallic standard, P, connected with the guide by a metallic link, g. If, now, we suppose the sliver or roving to be in the fork of the guide, and intact, and the fork, by the drait on the roving or sliver, to be depressed so as to raise the wire loft the anvil m, the circuit will be broken or open, it being understood that the circuit-wires are to be connected with or applied to a galvanic battery. On advancing the shipper far enough, its latch 0 will catch upon the lower arm of the bent lever,

the retractive force of the spring of the shipper causing the bent lever to be turned on its fulcrum up against the, escapement or stud b of the trigger E, whereby the longer arm of the said trigger will be moved up against the lower end of the armature. Under this condition :of the parts the shipper will be estopped in position, and will remain so while the sliver or roving may hold down the guide; but should the sliver or roving become broken or run out, so as to allowthe guide to rise, its heavier arm will descend until the wire l-may reach the anvil m which having taken place, the circuit will be closed,

and the armature will bedrawn toward the magnet and oi'fthetrigger. This'latter, rising up, will carry the escapement-stud off the bent lever, and allow it to be thrown up clear of the spring latch of the shipper, in which case the spring of the shipper Will force such shipper backward, andby it effect the stoppage of the machine. Over the shipper, and below the electro-magnet, there is a circuit breaker and closer, S, to be actuated by the shipper.

It consists, mainly, of ametallic spring, w,

respectively attached to the two buttons, the

same being asshown in the drawings. The said circuit breaker and closer further consists of a stud, umhich extends up from the shipper, and, while the shipper is being advanced, is carried against the spring 10, so as to move it inward, and its button 8 against the button it, and close the circuit. On the shipper being i'orcedback by its spring, the spring to will be set free, and will. move the button 8 away from the'button t, and thus .the circuit will be open or broken. Thus, while the machine is stopped, the batterywill cease'its action.,

We contemplate the application of our electromagnetic stop-motion to various kinds of machinery used for making drawing, roving, or yarn, or in the manufacturing of textile fabrics, the guide, in its construction, being varied, as circumstances may require.

, We are aware that an electromagnetic stopmotionfor machinery for spinning is not new, such being described in the United States Patent No. 138,993, dated May 20,1873. Our stopmotion, though, like that, containing a mechanism by which, when a thread may brealqtliecircuit will be closed, and the magnet be caused to operate its armature, to cause'it to set free the shipper to enable its spring to actuate it, differs materially therefrom in its construction, arrangement, and operation of its parts, especially in the latching mechanism, and in the arrangement, construction, and mode ofoperation of the circuit breaker and closer S, which is entirely disconnected from the yarnguide lever H, and in no respect aids in moving such relatively to the yarn, as does the device or yoke described and shown in the said patent. Our latching mechanism, as described, produces so little pressure on the armature that a very small amount of electric force is required to operate such armature.

We claim as our invention as follows:

;;l. The electromagnetic stop-motion, substantially as described, composed of the electro-magnet G, its circuit a o, armature F, drawing or roving guide H, shipper A, operative spring B, latch O, and levers D E, all arranged and applied as set forth.

t 2. Weclaim the combination of a circuit breaker and closer, S, (so separated from the yarn-guide lever H as, while in movement, to be incapable of moving it either way on its fulcrum,) with the electro-magnet G, its circuit n o, armature F, the drawing or'roving guide H, the shipper A, its operative spring B, and latch or latching mechanismO D E b all applied and to operate substantially as specifie ERASTUS BOYDEN. GEORGE H. PILLSBURY. Witnesses:

HENRY R. men, A. J. SHEPARD.

Images