US2378895A - Loom stopping means - Google Patents

Description

June 26, 1945. I Y c. D. BROIWN 2,378,895

LQOM STOPPING MEANS Filed June 2, 1944 2 Shegts-Sheet 1 INVENTOR. CARL D. BROWN ATTORNEY.

June 26, 1945. c. D. BROWN LOOM STOPPING MEANS Filed June 2, 1944 2 Sheets-Sheet 2 /26 filll a FIG. 3. 34 36 or 38 92 Ff: M q 58 P 56 FIG. 4.

INVENT OR.

CARL D. BROWN wym ' ATTORNE).

Patent ed June 26, 1945 UNITE-1D STAT 12s ear em op Carl? Brown, Hopedale; Mass. assignor to Draper: Corporation, Hopedale, Mass, a corporation ofi Maine Application June 2, 1e44,.ser ia1No. 538,477

. 4 Claims, C1. Mil-31?) The present invention relates, generally to looms and, as illustrated herein-,relates more particularly to means. for stopping the loom upon the occurrence of. a. filling failure.

It is common practice to provide means for stopping the l'oom, when there is a filling failure due,, for examplato fillling breakage. Detection .of such failure. takes'plac in. many cases at the filling replenishing side. of the. loom. and. stopping of the loom is accomplished through a filling iork feeler mechanism which operates through con.-

nections tothe; other side of. the loom to. move the shipper handle out of holding position and into stopping. position. to throwpower from the ldom. Such connections,.. however} sometimes fail. to effect. stopping .of"the loom because of excessive lost motionbetween the parts.

One. obj ectof. the. present-invention is to pro- .the use of a great. number of mechanical con.- nections. To this end and in accordance with videastopping. means for. aloom which will avoid one feature of. the invention,. the filling. fork. feeler filling-fork slide. thus closing the solenoid circuitandraising the. knockoff into position to be engaged by a bunter fixed to the lay and thus stop the loom.

With the above and other objects and features carrying electrodes (not shown) "through which the circuit ,is; completed. by usual. drop. wires which normally. are. held. out. of contact with said electrodes by the. warp. threads.

The electrical system can best be describedb y reference to Fig. 3 which shows a diagram of the. circuit. The loom. is. usually provided witha switch. box. 2!]. (Fig. .1) having a. conduit 22 leading ,to. a transformer box 24. The box 24 contains a-transformer [26. having a primary winding 28 and a secondary winding 3:0. The transformer. transforms. from. 119. voltsfto twelve volts. One. of. the. leads 32yfrom the. secondary is grounded on the machine frame 10.. I'heother lead 34. is connected to. one pole of a switch 36 which. opened and closed. upon: manipulation of the shipper 38. to stop and start. the. loom. The other pole: of the switch. 36. is connected to one terminal. ofasolenoidfll having. an armature 42 associated therewith. The other terminalof the solenoid isconnected by a leadto an electrode 44 which is insulated .fromthe machine frame by insulation 46.. The. electrode 48'is grounded on. the machine frame. The circuit so .far de-iscribed is old and well" known in the art.

When a drop wire 45 engages both. electrodes .44 and. 48 thecircuit is. closed and the armature 42 is actuated and through. connections 50 lifts a knock-off finger 52 into the path of movement of a bunter 54 fixed to the rear face of thelay l2. The finger 52 is pivotally secured to the upper end portion ofa knock-01f lever 56 pivoted in view, the invention will now be described with I particular reference to the accompanying drawings which illustrates a preferred embodiment of the invention and in which:

Fig. lfis aview in side elevation of the right hand side frame of the 100m with the filling replenishing mechanism removed:

Fig.2 is a view in front elevation, on a some- What enlarged scale, of the circuit closing mechanism;

Fig. 2A is a view partly in section, taken along line IIAIIA of Fig. 2;

Fig. 3 is a circuit diagram; and

Fig. 4 is a view similar to Fig. 1 but illustrating at 58 to the loomside [0. A rod 60 is pivoted to the lower end of the lever 56 and carries a block 62 arranged to engage a block 64 on a rod 66 pivotally secured to the lower end of the shipper 38 to move the shipper to off position and through suitableconnections disengages the clutch and applies the brake to stop the loom. Whenthe shipper is moved from the on position shown in Fig. 4 to the off position shown in. Fig. 1, the switch 36 is also opened so that no current flows through the circuit when the loom is The above mechanism is effective to stop the loom' only in the event of warp breakage but the loom is also provided with a usual electric warp stop motion which comprises end supports [8 present invention contemplates the use of this mechanism to stop the loom in the event of filling failure thus avoiding the use of the many mel filling failure.

chanical connections necessary between the means for detecting filling failure and the clutch of the loom. To this end, the loom is provided with a usual filling fork detecting mechanism including a filling fork 68, a filling fork slide 10, and the usual mechanism for reciprocating the slide; When the lay moves forwardly the filling fork 68 is engaged by the filling and is tilted to prevent operative connection between the slide and the operating lever 1| therefor. If no filling is present, the fork 68 will not be tilted and the lide 10 will be moved by lever II. The fork 68, slide 10 and lever ll differ from corresponding parts of substantially all domestic single shuttle looms only in the addition of parts hereinafter described.

As shown best in Figs. 2 and 2A, the slide 10 is provided with an upstanding latch 12 mounted on a pin 14 and held in position by a spiral spring 16. The latch 12 is arranged, upon movement of the slide 10, to engage a pin 18 extending laterally from a depending arm 80 formed as a part of a support 82. The support 82 is formed of sheet metal and is formed into a cylindrical shape to receive and hold a mercury switch 84 of usual construction. The support 82 is pivotally mounted on a pin 86 fixed in a holder 88 secured to the loom'frame Ill-by a nut 90. The mercury switch 84 is normally maintained in the tilted position shown in Fig. 2 by a spiral spring 9! but is arranged to be tilted in the opposite direction by engagement with the latch 12 when the slide 10 is moved forwardly upon the occurrence of a V The mercury contained in the switch 84 will then fiowand close the circuit across the electrodes (not shown) which are connected to flexible leads 92, 94. The closing of the circuit is only momentary since the latch 12 will pass from under the pin 18 and the spring 9| will return the switch 84 to its normal position. 011 return 'movement of the slide 10, the latch 12 will yield when it engages the pin 18.

g The lead 92 is connected into the solenoid circuit between the solenoid and the electrode 44. The lead 94 is grounded on the loom frame. Thus, when the switch 84 is tilted, the circuit is closed and the solenoid energized to attract the armature 42 thus raising the knock-off finger 52 and stopping the loom when it approaches back center.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a loom, electric stop mechanism for stopping the m upon warp failure, a filling feeling fork, a slide on which said fork is pivoted, means for operating said slide upon filling failure, a trip member on said slide, and circuit closing means tripped by said trip member upon movement of said slide to close the electric circuit controlling said stop mechanism to stop the loom.

2. In a loom, warp stop mechanism for stopping the loom, electrically operated means for controlling the operation of said warp stop mechanism upon warp failure, a filling fork for detecting filling failure, a slide on which said fork is pivoted and whichis arranged for movement upon detection of filling failure by said fork, and an electric switch member arranged to be tripped to close the electric circuit of said electrically controlled means upon movement of said slide.

3. In a loom, warp stop mechanism for stoppin the loom, electrical means for controlling the operation of said stop mechanism, an electric circuit for energizing said electrical means, means for closing said circuit upon the occurrenceof warp failure, a fillingfeeling .fork, a slide on which said fork is pivotally mounted, means for moving said slide upon detection of filling failure by said fork, trip means on said slide, and a mercury switch in said circuit arranged to be engaged by said trip means and moved into circuit closed position upon movement of said slide.

4. In a loom, warp stop mechanismfor stopping the loom, electrical means for contr0lling the operation of said stop mechanism, an electric circuit for energizing said electrical means, means for closing said circuit upon the occurrence of warp failure, a filling feeling fork, a slide on which said fork is pivotall mounted, means for moving said slide upon detection of filling failure by said fork, trip means on said slide, a mercury switch, and a pivotally mounted bracket supporting said switch and having a dependingarm arranged to be engaged by said trip meansand moving said switch into circuit closed position upon movement of said slide.

CARL D. BROWNJ

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