US1958112A - Electrical filling stop motion for axminster looms - Google Patents

Description

May 8, 1934- w. w. ROBERTSON 1,958,112

ELECTRICAL FILLING STOP MOTION FOR AXMINSTER LOOMS Filed May l0. 1932 Patented May 8, 1934 uNrre S'fFAS FFHC ELECTRKCAL FILLHNG STOP MOTION FOR AXMINSTER LOGMS Application May 10, 1932, Serial No. 610,415

1 Claim.

rEhis invention relates to means for stopping an Axminster loom on the occasion of a iilling break.

Mechanical stop motions for this purpose have been heretofore devised in which the forward y motion oi the lay was utilized to release the vshipper handle or knock-off mechanism. This form of stop motion has been found somewhat unsatisfactory, as the loom it not stopped until after certain changes have taken place which render it more dimcult to re-set the loom for Ysubsequent operations after the lling break has been repaired.

It is an important object of my invention to provide a lling stop motion for an Axminster loom which will become effective earlier in the loom cycle and which will normally stop the loom with the lay at or near back center and before a pattern change.

To the accomplishment of this object, I provide stopping mechanism operating independently of Athe lay and normally effective to stop the loom prior to the iorward movement of the lay.

In the preferred form, my improved stop motion is electrically operated and is so designed that the loom is stopped immediately upon indication of lling break and without dependence on the movements of any mechanical actuating parts.

My invention further relates to arrangements 30A and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawing, in which Fig. l is a diagrammatic view showing the relation of the parts of my improved stop motion;

Fig. 2 is an enlarged side elevation of parts of the knock-off mechanism;

Fig. 3 is a plan view of certain parts looking 40. in the direction of the arrow 3 in Fig. 2;

Fig. 4 is a front elevation thereof, looking in the direction oi the arrow 4 in Fig. 2, and

Fig. 5 is a detail sectional plan view, taken along the line 5-5 in Fig. l.

Referring particularly to Fig. 1, I have shown the usual iilling cone 10 from which lling F is drawn during the operation of the loom. This filling F passes through a pair of adjacent guide rings 11 and alongside a lling feeler or detector 50v 12.

This lling feeler 12 is shown in the form of a rod, mounted in a hub 13 swinging about a xed pivot 14. The rod 12 extends upward between the two guide rings 11 and is maintained in substantially vertical position by engagement with the lling F as it passes through the rings. When the iilling breaks, the feeler 12 moves in the direction of the arrow a in Fig. l, causing an arm 15 on the hub 13 to engage a contact plate 15 and thus complete a knock-ofi circuit which will now be described.

The contact plate 16 is connected by a wire 20 to the coil of a magnet M, which coil is also connected by a wire 21 through a fuse 22 to the secondary coil 23 of a transformer T. One side of the secondary coil 28 is grounded and the hub 13 which supports the circuit-closing arm 15 is also grounded.

The primary coil 25 is connected between certain poles of a power circuit, and the primary and secondary are so related that a low-voltage current, such as 12 volt, is provided for the magnet M.

A solenoid S is connected by a wire 30 to a terminal 31 and the associated terminal 32 is connected by a wire 33 to one pole of the power circuit. The solenoid S is also connected by a second wire 35 to another pole of the power circuit, so that current at comparatively high voltage, shown in the drawing as 440 volts, is available for the solenoid S.

A lever is pivoted at 41 adjacent the magnet M and is provided with a Contact plate 42 adjacent the terminals 31 and 32.

The operation of the parts thus far described is as follows: On the occurrence of a break in the lling F, the arm 15 engages the contact plate 16, closing the secondary or twelve-volt circuit through the magnet M and causing the magnet to pull the lever 40 upward, thus bringing the Contact plate 42 into engagement with the terminais 31 and 32 and closing the primary circuit, thereby energizing the solenoid S.

The knock-01T mechanism controlled by the solenoid S comprises a solenoid plunger connected by a link 51 to a lever 52 pivoted at 53 0n a fixed bracket 54. A shipper lever 55 is mounted on a xed pivot 56 and is connected at its lower end by a link 57 to an arm 58 on a knock-off shaft 59.

A threaded rod 60 is mounted in the upper end of the link 57 and extends outward at right angles thereto through a slot or opening in the upper end oi the lever 52. A nut 61 is threaded on the rod 60 and provides an adjustable abutment for engagement by the lever 52. A spring 65 (Fig. 4) normally withdraws the lever 52 and plunger 50 to the position shown in Fig. 1.

When the solenoid S is energized, the lever 52 is pressed against the nut 61 on the threaded rod 60,

thus causing the link 57 and the lower end of the shipper lever 55 to exert a toggle action on the arm 58, rocking the knock-02T shaft 59 to release the clutch and to apply the brakes through the usual operating connections, not shown.

It will be noted that the operation of the stop motion is entirely independent of the position or movements of any mechanically-actuated part of the loom, and that the stop motion will operate immediately upon indication of a break in the lling F.

While the operation of the stop motion may take place at any time, it is found in actual operation that breakage of lling almost invariably occurs during the forward movement of the needle by which the lling is carried through the shed. This being the case, the loom is normally stopped during the time in which the reverse movement of the needle is completed and before forward movement of the lay or closing of the shed. All parts of the loom are thus in the most favorable position for the Weaver to repair the break and to resume Weaving operations.

Through the provision of the electrical connections shown and described, a low voltage and harmless current is controlled by the filling feeler, and the relatively heavy current required for stopping the loom is controlled by the magnet-operated switch lever 40, which may be effectively insulated from all parts of the loom.

Having thus described my invention and the advantages thereof, I do not Wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:-

In an Axminster loom, a lling feeler, a knockoff device, and electrically controlled connections between said filling feeler and said knock-off device, said connections including a solenoid coil, a plunger therefor, toggle members actuated by said plunger, and a knock-off shaft rocked by said toggle members to eilect loom stoppage.

WILLIAM W. ROBERTSON.

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