US1681888A - of millville - Google Patents

Description

D. E. SKEDGELL STOP MOTION FOR LOOMS Aug. 21, 1928.

Filed June 20, 1927 Z I 0 1 I O 1 wi r n p A G m N 27. A 1 D fl B .fi wan. 5

WITNEEQQ notches at different levels is substituted to- Patented Augazl, 1928.

UNITED STATES 1,681,888 PATENT OFFICE.

1) AVID E. SKEDGELL, OF MILLVILLE, NEW JERSEY, ASSIGNOR TO MIIiLVILLE MANU- FACTUBING COMPANY, OF MILLVILLE, NEW' JERSEY, A CORPORATION OF NEW JERSEY.

STOP MOTION FOR LOOMS.

Application filed June 20, 1927. Serial No. 200,122.

This invention relates to stop motions such as are used on Northrop looms, more particularly as modified in accordance. with my co-pending U. S. patent application, Serial No. filed October 17, 1925, wherein, in lieu of the usual single notch constantly-reciprocating hook element, one with two cooperate with the tail loop of the detector tork either in the absenceot' filling or in the presence of an abnormal obstruction, such as an accumulation of lint or fly, before the reed in ell'ecting automatic stoppage of the loom, said hook element being pivotally connected to a vibrating actuator and resting on a support by which'it is confined to movement in a definite horizontal plane.

I In connection with a stop motion operating upon the above principle, I aim to prevent accidental lifting of the hook element above its supporting rest through arring or vibration of the loom, particularly when operated at very high speeds, and thereby to obviate on the one hand, the possibility of damage to the detector, and on the other hand, of maloperation oi": the 100111 stopping mechanism which is dependent upon the hook element for its actuation.

in the orawings herewith, Fig. I is a partial plan view of a loom of the Northrop type with a filling stop motion conveniently em bodving my present invention; and,

' 11 is a fragmentary detail section "ken as indicated by the arrows IIII in IVith reference first more particularly to Fig.- l of these illustrations, the lay of the loom is comprehensively indicated by the numeral 10 and the breast beam by the numeral 11. Secured to the breast beam 11 at one end is the usual lateral guide 12 for the slide 13 or the stop motion, which slide is stationary in the position shown during normal operation of the loom. At its outer end, the slide 13 is operatively coordinated with the belt shipper tripping mechanism,that is to sayit engages a tripping lever 14 that is fulcrumed at an intermediate point to swing horizontally about a fixed pivot 15, and reaches to the belt shipper arm 16 (or clutch arm as the case may be) the latter being normally held locked in active position in opposition to the influence of a spring, not shown. through engagement within a lateral notch 17 of a motion limiting slot 18 formed in anextension bracket 19 on the breast beam 11. At its inner end, the slide 13 pivotally supports a filling detector 20 with depending fil ork-like prongs 21 and a rearward lateral tail loop 22.

This detector 20 cooperates in a well known manner with the grid 23 which is set on the lay 10 in an interval provided for its accommodation between the end of the reed 2d and the shuttle box 25, see Fig. I. The motion necessary to trip the belt shipper mechanism is derived "from an actuator in the form 01 an arm 26 that is continuously vibrated or oscillated about a fulcrum in the lower part of the loom frame by a suitable cam on the cam shaft (not shown) in the customary manner. The upper end of this actuator 26 projects vertically through a central longitudinal opening 13 in the slide 13 to in'ipart movement to a pivotally-attached hook member 27 that is confined to reciprocation in a definite horizontal plane as a consequence of its resting on a web support 28 which extends transversely of the slide opening 13% As shown in Fig. II, the member 27, instead of being of the single book type as is usual in the Northrop filling stop motion, comprises two hook arms 29, 3O whereof the former is straight and horizontal, while the latter: is curved to overhang the first and separated from it by an intervening bight 31. i -The arms 29, 30 ot' the hook element 27 are apparent upon each movement of the lay 10 1 toward the breast beam 11 with filling lying across the reed 24 and the grid 23, that the detector 20 will be swung to the full line position of Fig. II so that its tail piece 22 enters the bight 31 of the hook member 27 above the level of the recess 32 in the lower or horizontal arm 29. In the absence of filling however, the detector 20 will not be effected as just explained with the result that its tail piece 22 will drop into the notch 32 of the lower arm 29 of the hook member 27 as shown in dotted lines in Fig. II, and consequently, as it moves forward, the slide 13 will be carried along, such movement of the slide being thereupon imparted directly to the tripper arm 14 thereby causing'the belt shipper 16 to be displaced from the notch '17 and released to the action of its spring for immediate stoppage of the loom. In-the event of the presence of a more bulky obstruction than the filling before the grid 23, such for example as an accumulation of lint of fly, the detector 20, upon approach of the lay 10, will obviouslybe swung to a greater degree than before and its tail piece 22 lifted to the plane of the upper hook arm of-the member 27-as shown in dot and dash lines in Fig. 11, and thus engaged by the hook notch 33 so that the loom is automatically stopped through the same interposed instrunientalities and in precisely the same manner asbefore.

Now as a consequence of jarring or Vibra' tion of the loom attendant upon the violentthrowing ofthe shuttle from one side to the other, particularly at high speed operation, the hook memberQT, by virtue of resting merely under its own weight upon the support 28 in the usual construction of the stop motion, is sometimes bodily lifted about its pivotal connection with the actuator 26 being thereby liable to cause IHHlFOlDQIZlt lOH of the belt shipping mechanism during its retractive moven'ient, or, as it moves inward, damage to the detector 20. To obviate this difficulty I provide means to yieldingly hold the hook element 27 to its guide support 28, such means being herein shown as having the form of a helical spring 35 in tension between a fixed anchorage 38 on the actuator 26, and a point on said fork element in close proximity to its pivotal center. The spring 35 obviously yields to permit the necessary pivotal movement of the hook element 27 in adjusting itself to the angular swing of the actuator 26,

and at the same time prevents rise of said element from its support so that the action of the detecting mechanism is rendered absolutely positive and reliable under all conditions of loom operation.

Having thus described my invention, I claim:

1. In a filling stop motion for looms, coinprisinga hook element with notches in different planes, said element pivotally connected to a constantly vibrating actuator and con fined by an underlying supporting rest to definite reciprocatory movement relative to the filling detector in readiness to be autoniaticall y engaged by the tail loop of the latter in the absence of filling or in the presence of an abnormal obstruction before the reed, the combination of a spring in tension means to prevent the hook element from being accidentally lifted from its supporting rest and causing IDHl-(JPQlfltiOD of the loom stopping mechanism.

2. In a filling stop motion for looms embodying a hook clement pivotally connected to a constantlyvibrating actuator and confined by an underlying supporting rest to definite reciprocatory movement relative to the filling detector in readiness to be automat-ically engaged by the tail loop of the latter in the absence of filling before the reed of the loom, the combination of a spring in tension between a fixed anchorage on the vibrating actuator aforesaid and the hook element to prevent the latter from being accidentally lifted from its supporting rest and wausing mal-operation of the loom stopping mechanism.

3. The con'ibination in a filling stop motion for looms, of a hook element with notches in different planes, said clement'being pivotally connected to a constantly vibrating actuator and confined by an underlying supporting rest to definite reciprocatory movement relative to the filling detector in readiness to be a'utoniatically engaged by the tail loop of the latter in the absence of filling or in the presence of an abnormal obstruction before the reed of the loom, and a spring in tension between a fixed anchorage on the actuator and the hook elementto prevent the latter from being accidentally lifted from its supporting rest and causing mal-operation of the loom stopping mechanism.

In testimony whereof, I have hereunto signed my name at Millville, New Jersey, this 14th day of June, 1927.

DAVID E. SKEDGELL.

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