US1353824A - Stop mechanism for looms - Google Patents

Description

T. F. FINN.

STOP MECHANISM FOR LOOMS.

APPLICATION FILED MAY 29. I920.

Patelited Sept. 28,1920.

THOMAS E. FINN, or NORTH n vnovnn, MAssAoHUsnrrrs.

s'ro-r MECHANISM non LOOMS.

Specification of Letters Patent. I

, Application filed May 29, 1920. Serial No. 385,330.

To all whom it may concern:

Be it known that I, THOMAS F. FINN, a citizen of the United States, residing at North Andover, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Stop Mechanism for Looms, of which the following is a specification.

This invention relates to a stop motion for looms. V

The object of the invention is to provide a simple mechanism for automatically stopping a loom in the event' that the filling thread breaks or becomes exhausted.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings: 1

Figure 1 represents aside elevation of a portion of a loom, the lay being shown in section, my improved stop mechanism being embodied therein.

Fig. 2 is a plan View of a portion of the mechanism, the breast beam being broken away to save space in the drawings and to enable both ends of the release rod to be illustrated.

Fig. 3 is a detail front elevation of the release rod.

Fig. 4 is a detail section taken on the line 4-4, of Fig. 2.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 represents one of the side frames of a loom, 6 the breast beam and 7 the lay. Fast tofthe breast beam 6 midway of said beam is a bracket 8 which is provided with arms 9 andlO, and to the arm 9 is adjustably fastened by a bolt 11 a cam 12. Fastto the arm 10 is a stud 13 upon which is. pivotally mounted a tumbler 14, which is normally held by a spr1ng l5 in the position illustrated in Fig. 1, at whlch time an end 16 thereof abuts against a stop 17 provided upon the arm 9, and a portion of said end 16 projects above a topedge 18 of the arm 9. The spring 15 is coiled around the stud '13 and one end ofsaid spring contacts with a projection 19 upon the tumbler 14 while the other end projects into a collar 20 which is adjustablymounted upon the. stud 13. v

Fast to lay 7 is ,a bracket-21 which 1s pro" vided with ears 22 between which'is mount-- ed upon a shaft 23 a rocking member 24 to which are secured a plurality of feeler wires 25. The feeler wires 25 project above a groove 26 provided in the upper surface of the lay. Fast to the shaft 23 is an arm 27 which is connected by a rod 28 with a dagger socket 29 pivoted'at 30 to a portion of the bracket 21. .A dagger 31 is secured to the socket 29 and is bent toproject over the arm 9 and cam 12. A'spring 32' acts to hold the dagger 31 upon the cam 12 and tends to cause the dagger to follow the v curve of the" cam as the lay oscillates.

In stopping the operatlon of the loom, it

is necessary to disconnect the friction driv- Patented se t. as, 1,920.

mg members which transmit the power and 7 also operate a band brake mechanism thereby stopping the momentum of the loom.

Fast to a shaft 33 which extends between the side frames 5 of the loom is a shipper handle 34 which has'fo'rmed integral therewith at its lower'endan arm 35 from which projects a pin 36 which engages'a lever 37 pivoted at 38 to the frame'5. The lower end of the lever 37 has a shipper rod 39 attached thereto, the said shi'pper'rod'being connected with the movable member of the friction driving mechanism not illustrated in the drawings-but well known to those skilled in the art.

The band brake also not illustrated in the drawings is operated by the movement,

of a foot treadle 40, the forward end ofwhich is illustrated in Fig. 1. Attached-to the foot treadle40 at 41 is a treadle rod 42 which has a locking member 43 attached to its upper end, the said locking member constituting a part of said treadle rod and projecting through aslot provided in a guiding member 44 fastened to theframe 5 of the loom. 'A spring 45, the tension of which may be adjusted by a movable collar 46, rests on a bracket '47 fastened to the frame 5 of the loom, and tends to keep the foot treadle 40 in a raised position, at which time the friction band is held tight around 1 means of a key 48'which projects into a notch 49 provided'in the locking. member 43' as illustrated in Fig.4. A flat spring ,50 atthebrake wheel. When the foot treadle 40 is tached to the upper end of the treadle rod 42 contacts with the rear of the guide mem ber 44 when the locking member 43 is lowered and presses the latter forward so that the jar of the loom will not allow the treadle rod to become accidentally disengaged and the brake applied while the loom is running. Fast to the treadle rod 42 is a knockoff cam 51 which is so positioned that when the treadle rod 42 is released it will hit the lower end of the arm 35 of the shipper handle 34 which is then in the position illustrated in dotted lines, Fig. 1, thereby releasing said handle and thus shutting off the power.

All of the mechanism thus far described is old and Well known in the art, being a portion of the equipment of the Knowles loom. The novel feature of this invention lies in the mechanism which is provided for releasing the locking member 43 from the key 48 and thereby simultaneously applying the band brake and operating the shipper handle to disconnect the power. This mechanism is as follows :Extending longitudie nally of the breast beam 6 from a point approximately midway its length to a point adjacent to the treadle rod 42 is a release rod 52 which is supported-in a plurality of bearings 53 which are attached to the breast beam 6. The outer end of the release rod 52 is bent upwardly at 54 and said upturned end is located directly in front of the upper end of the locking member 43. The inner end of the release rod 52 is bent downwardly at 55 and is again bent to terminate in a short portion 56 which is parallel to the main portion of the rod.

The portion 56 has a rod 57 attached.

thereto which has screw-threaded engagement with a member 58 which in turn issecured to the tumbler 14 at 59; By removing the member 58 from the tumbler l4 and turning said member upon the rod 57, the

end 54 of the release rod 52 may be correctly positioned relatively to the locking member 43. When the tumbler 14 is engaged by the dagger 31 causing the tumbler to be rocked upon the stud 13, a rocking movement is imparted to the release rod 52 and the end 54 thereof is caused to engage the upper end of the locking member 43 and force said member out of engagement with the key 48.

The general operation of my improved stop motion is as follows: In starting the loom the foot treadle 40 is pressed downwardly, thereby releasing the hand brake.

- The foot treadle 40 is held in its lowermost to throw on the power. Each time that the lay 7 moves back from the fell of the cloth, or in other words, away from the breast beam 6, the dagger 31 contacts with the cam 12 and acts to lift the dagger socket 29 and thereby raise the feeler wires 25 to a sufficient height for the shuttle to pass therebeneath and deposit the filling thread between the warp threads in a manner well known to those skilled in the art.

When the lay 7 again beats up or moves toward the breast beam 6 the feeler wires 25 will swing downwardly as the dagger 31 moves over the surface of the cam 12, and if the filling thread is unbroken between the warp threads, the feeler wires 25 will be supported by said filling thread above the groove 26 and will hold the dagger 31 above and out of contact with the end 16 of the tumbler 14. If, however, the filling thread is broken or has become exhausted in the shuttle, as the lay 7 beats up, the feeler of engagement with the key 48. The treadle rod 42 being thus released will be forced upwardly by the spring 45 thereby pulling the foot treadle 4O upwardly and applying the brake mechanism. During the upward movement of the treadle rod 42 the knockoff cam 51 will engage the lower end of the arm of the shipper handle 34 thereby forcing the said shipper handle from the position illustrated in dotted lines, Fig. -1 to the position illustrated in full lines, and thereby shutting off the I claim:

1. A stop motion for looms embodying therein a shipper handle adapted to control the power for the loom, a treadle rod adapted to control a brake, means to lock said treadle rod to hold said brake in a released position, a release rod adapted to engage said treadle rod, a tumbler operatively connected with said release rod and means controlled by the filling thread adapted to rock said tumbler and thereby impart a rocking movement tovsaid release rod, whereupon said treadle rod and shipperhandle will be operated simultaneously to stop the loom.

2. A stop motion for looms embodying therein a shipper handle adapted to control the power for the loom, a treadle rod adapted to control a brake, means, to lock said power.

treadle rod to hold said brake in a released position, a release rod, one end of which is provided with an upwardly extending arm adapted to engage said treadle rod, a tumbler, means connecting said tumbler with said release rod and means controlled by the filling thread adapted to rock said tumbler and thereby impart a rocking, movement to said release rod, the upwardly extending arm of said release rod being rocked against said treadle rod to force said treadle rod out of engagement with said locking means, whereupon said treadle rod and shipper handle will be operated simultaneously'to stop the loom. V

3. A stop motion for looms embodying therein a shipper handle adapted to control the power for the loom, a treadle rod adapted to control a brake, means to look said treadle rod to hold said brake in a released position, a release rod, one end of which is provided with an upwardly extending arm adapted to engage said treadle rod, and the other end thereof provided with a down wardly extending arm, a tumbler, means connecting said tumbler wlth said downwardlyextending arm and means controlled by the filling thread adapted to rock said tumbler and thereby impart a rocking move-' ment to said release rod, the upwardly extending arm of said release rod being rocked" against said treadle rod to force said treadle rod out of engagement with said locking means, whereupon said treadle rod and shipper handle will be operated simultaneously to stop the loom.

' 4. A stop motion for looms embodying connecting said tumbler with, said down- Wardly extending arm, means to vary the length of said connecting means and thereby position. said upturned arm relatively to said treadle rod and means controlled by the filling thread-adapted to rock said tumber and thereby impart a rocking movement to said release, rod, the upwardly extending arm of said release rod beingrocked against said treadle'rod to force said treadle rod out of engagement with said locking means, whereupon said treadle rod and shipper handle will be operated simultaneously to stop the loom. I I g a In testimony whereof .Ih-ave hereunto-set my hand inpresence oftwo subscribing wit- THOMAS- F. FINN.

Witnesses: I FRANKLIN E. Low,

HERMAN 'R. HOFFMAN.

Images