US911378A - Stopping mechanism for looms. - Google Patents

Description

T. A. B. CARVER. STOPPING MECHANISM FOR LOOMS.

. APPLICATION FILED FEB. 10. 1908. 91 1,378.

` Patented Feb. 2, 1909.

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T.' A. B. CARVER.v STOPPING MEGHANISM FOR LooMs.

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Patented Feb.2,1909.

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THOMAS ALBERT BRIGGS CARVER, OF GLASGOW, SCOTLAND, ASSIGNOR TO TEXTILE APPLIANCES LIMITED, OF GLASGOW, SCOTLAND.

Y STOPPING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented Feb. 2, 1909.

Application filed February 10, 1908. Serial No. 415,261.

To all whom 't may concern: Y

Be it known that I, THOMAS ALBERT Bniees CARVER, a subject of the King `of Great Britain, residing at Vl 18' Napierhall street, Glasgow, Scotland, engineer, have in vented certain new and useful' Improvements in Stopping MechanismforLooms, of which the following is a specification. y i

This invention relates toV apparatus by which the stoppage of a loom is effected upon any occurrence to the normal working, such as the breakage of a warp thread or of the weft, or upon anv other occurrence which might render the stoppage of the loom `necessary or desirable, Vand which through anyof thewell-known forms of detectors effects theV suoli electric circuit and is particularly de-` signed to be applied to existing looms without alteration of their working parts as usually constructed. Accordingly, by the present invention the coil and the armature of an electromagnet are connected with the ordinary lever controlling the position, in its stepped slot, of the starting handle or shipper lever, preferably by" being` simply" mounted upon the bar which carries the weft fork, and one or other correlated with a reciprocating part of the loom, such as the hammer or the reciprocating lathe, in such mannerthat during normal working one part can be displaced with respect to the other by the movement of the said reciprocating part, but :when the electromagnet -is sulliciently energized both parts andlwith them the lever with which they are connected, are displaced by suoli movement and lcaused to disengage the driving mechanism and so stop the loom.

-One form in which the improved detenty apparatus may be constructedis illustrated in the perspective view of Figure l inthe accompany-ing drawings, Figs. 2 and 3 being similar views of slightly modified cornstrucN tions, and Fig. 4 a longitudinal sectionalview on an enlarged scale, showing a preferredy con struction of el'ectromagnet. Y

v As therein shown, ct is the -ordinary bar which carries the weft fork l) pivotally mounted at one end thereof, c is the bell-crank hammer which actuates the .weft fork and'which is driven, through the arm d'fro'm thecam e on the lower shaft f of theloom, and g'is the pivoted leverwhich is actuated by the bar a, to stop the loom by displacing the shipper lever l; into the elongated slot t. All these `parts are as commonly arranged in looms.

According to the present invention the electromagnet of thedetent apparatus is secured, preferably adjustably on the bar o and the armature c is mounted to be moved freely longitudinallv of the bar a by the hamever, the electricv circuit which includes the magnet is closed by an occurrence to the noi'- mal working, the armature 7c will be clamped Vmagnetically to the bar a and the latter will therefore be moved on the forward stroke of the hammer or lathe to displace the shipper lever 't from driving engagement and the loom will stop.

The electromagnet j is preferably, but'by no 'means necessarily, constructed as shown of a cylinder of iron which is formed with an y annulus to receive the energizing coil y" and is bored to receive the spindle 7c of the springe-returned iron plate or cap armature 7c. The spindle extends rearwardly through the'magnet core and in the construction of Fig. 1 is secured, preferably adjustably, to a block m which is mounted to slide along the bar a and engages the hammer c either directly or through an adjustable finger fm. A spring n is provided to return the armature and its spindle to the position in which they are shown in Fig. 4. 'V

In the modified construction of Fig. 2, tiie armature s indle extends rearward y to a distance su 'cient to cause it to be displaced forwardly during the latter part of the'forward stroke of the lathe o by the engagement ofthe end of the spindle with a platefo suitably secured in any convenient position on the lathe. Alternately, and in some respects preferably, since it obviates the suddenness of the action, the spindle k may be actuated as shown in Fig. 3 by engagement with a lever p fulcrumed at its upper end in a bracket g, which'would usually be fixed, but may in certain instances be formedintegral wit or secured to the magnet j, and driven by a link r, connecting it with any suitable point of the lathe. By suitably proportioning the parts, the action is spread over the full 'L one member is connected with the said other reciprocating part 'from Which it may l be found convenient to derive the motion.

Having thus described the nature oiA this invention and the best means l know oi' carrying the same into practical eliect, l claimz- 1. n apparatus of the character herein described, a starting handle and means l'or shifting the starting handle into an inoperative position, said means being controlled by an electro-magnet having one member mounted to move in an axial direction relatively to the other under the action of a reciprocating part of the loom mechanism When the magnet is normally deenergized, substantially as described.

2. in apparatus oi the character herein described, a starting handle, means for shilting the starting handle into an inoperative position, an electro-magnet mounted to move with said shifting means, an armature i'or said magnet mounted to reciprocate under the action oi"l the loom mechanism and adapted to be clamped to said electromagnet When energized by an occurrence to the normal Working ol the apparatus, whereby the magnet and the armature are moved together to displace the starting handle, substantially as described. p

3. In apparatus oi the character herein described, a lever controlling the position oi' the starting handle oi the loom, an electromagnet and an armature therei'or oi' nich lever, While the other is i'ree to move in an axial direction relatively to the said member i under the action oi any suitable reciprocating part oi the loom mechanism when the 'electro-magnet is normally denergixed,

substantially as described.

4. in apparatus oi" the character described, a lever controlling the position ol' the starting handle ol` the loom, a bar carrying the Weit i'orl; connected with said lever, an

electro-magnet and an armature. therefor ol` which one is clamped to the said bar while the other is mounted to move in an axial direction relatively to the other under the action of a reciprocating part oi the vloom mechanism, vhen the electro-magnet is nornall f dcner -ved substantially as described.

5. in apparatus olI the clntracter described, a starting handle, a lever controlling the position thereof, a bar carrying the welt iorl connected with said lever, an electro-magnet clamped to said bar and normally deiinergizced, an armature mounted to move l'reely to and lro with respect io said electro-magnet, means actuated by a reciproeating` part oi the loon: mechanism to move said armature in a direction anay i'rom the magnet, said armature adapted lo be clamped magnetically to the magnet when energized and to bc moved together f:

with the magnet in the aforesaid direction, substantially as described.

In testimony hcreol' l have signed my name "to this speciiication in the. presence ol' tivo subscribing witnesses.

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