US1140063A - Stop mechanism for textile-machines. - Google Patents

Description

1.1;. PRATT.

STOP MECHANISM FOR TEXTILE MACHINES.

APPLICATION FILED FEB. 12, I914.

1,140,063. Patented May 18, 1915.

INVENTOR ATTORNEY THE NORRIS PETERS CO1. F'HOTO-LITHO.. WASHINGTON. D, C.

resents aside elevation of the same; Fig. 3

JOSEPH c. PRATT, 0F IEI-IILAIDELPHIA, PENNSYLVANIA.

STOP MECHANISM FOR TEXTILE-MACHINES.

To all whom it may concern:

Be it known that I, JOSEPH O. PRATT, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Stop Mechanism for Textile-Machines, of which the following is a specification.

This invention relates to an automatic knock-off or stop mechanism for use with drawing machines, gill boxes or like machines wherein a plurality of slivers are doubled and drawn into a single elongated, narrowed and thinned strand or ribbon, which in turn may be drawn with" other similar slivers in a similar manner. In machines of this character as heretofore constructed it is a common happening for a sliver to break during the drawing operation, which, if unnoticed by the operator, causes the resultant strand or combined sliver to be of less weight than required, and where there are many successive drawings this difference in weight may be materially less than the normal estimated weight.

It is an object of my invention to provide a mechanism directly under the control of the sliver or slivers being fed to the machine a and which is positively actuated to cause the machine to stop should one or more of the slivers break, thus preventing further feeding of the'slivers or ends."

It is a further object, of 'my invention to provide a stop mechanism for drawing machines or gill boxes which when actuated by the breaking of a sliver or slivers renders the machine inoperative until the broken strands have been repaired or replaced.

It further consists of other novel features of construction, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at present'preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various, instrumentalities of which my invention consists can be variously arranged and organized and'that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Referring to the drawings: Figure 1 represents a perspective of a knock-0E mechanism embodying my invention; Fig. 2 rep- Specification of Letters Patent.

Patented May 18, 1915 Application filed February 12, 1914. Serial No. 818,303.

represents a plan of the device; Fig. 4: represents one of the detectors in detail; Fig. 5

represents one of the trip armsin detail.

Similar numerals of reference indicate corresponding parts. e

1 designates the frame of a drawing machine .or gill-box mechanism having an upright or standard 2 secured thereto at a suitable point, and carrying a plate 3, the position of which is between the sliver can or source of supply and the machine whose function is'to draw the ends oreslivers into a combined single strand. The plate 3 serves as a guidefor the ends or silvers and is provided with a, plurality of sliver guides 4:,

preferably in the formwof openings which are of course arranged in any desired or convenient manner and serve to pass the. several independent slivers to the drawing frame, Adjacent each of the guides 4- I have, in the preferred form of my invention, mounted-a detector 5 which ispivoted-to the plate 3 in such a position that it Will be held in a raised position by the str'andvor sliverpassing through the adjacent guide. As here shown there are siX guides in the plate 3, each of which has adjacent thereto one oflthe detectors 5 so-that when all of the strands are being. fed to the machine each detector will be supported and ride upon the 7 the'opposite side of the plate, each pair being thus in juxtaposed relation, the object of which construction will be apparent when it is stated thatthefl automatic knock-01f mech anism or means forv stopping. the machine is controlled by a change in positionof any of the detectors. In other words, in the pre ferred form all of the detectors operate and control the same mechanism for bringing the machine to rest. This stop mechanism comprises a rod 7 mounted for sliding movement in suitable guide brackets 8 of the standard 1, and carrying a plurality of trip arms 9, each of which is so' arranged and positioned as to be in the path of movement of one of the detectors 5. In my present construction the trip arms 9 areshown in the form of'a loop member, each side of which movement of; either one of the adjacent pair at 19 to a fixed part.

of detectors and the rod 7, therefore, may be set into operation by the movement of any or all of the detectors.

10 designates a lever arm pivoted at 11 to a suitable part of the machine frame 1 and connected at one end to the rod 7 On the opposite end of said lever there is a counterweight 12, which is accurately adjusted to maintain the rod 7 in substantial equilibrium whereby a slight increase in weight of the rod 7 will cause these conditions to be overcome and result in the rod moving automatically to its lower position. This movement of the rod is utilized to bring a block 13, carried by the end of the rod 7, into alinement with and between a slide bar 14 and a striker or hammer 15'. The striker 15 is continuously reciprocating out of contact with the bar 14, but in such close proximity thereto as to cause its motion to be transmitted thereto should the block 13 be dropped or interposed between the adjacent ends of these members. The striker 15 receives its motion from a side-faced cam 16, mounted upon the main shaft 17 of the machine, through the medium of a link 18 connected at one end to the rod 15 and pivoted A cam roller 20 is mounted on the opposite end of the link 18 and is normally held in contact with the cam by a spring 21. Thus as the cam rotates the lever 18 will shift the striker 15 toward the bar 14 and the return movement will be made under the action of the spring 21. The bar 14 is utilized to transmit movement to the belt shifting mechanism so that whenever the said bar is actuated the belt will automatically be thrown from the driving pulley to the loose pulley, and the machine of course brought to rest.

In the present embodiment of my invention I have preferred to employ the following mechanism for transmitting movement of the bar 14 to the belt shifting mechanism, but I do not wish to be restricted or limited as to this particular mechanism, since it will readily be apparent that various mechanical expedients may be employed for the purpose. 22 designates the main shift rod for throwing the belt from one pulley to another, the same being arranged so that it may be conveniently operated from either side of the machine, thus allowing the machine to be manually stopped according to the position of the operator. 23 designates an auxiliary shift rod connected to the main rod 22 by means of a pivoted bell crank 24. This latter rod is arranged to be operated at either end of the machine and is also utilized to transmit the movement of the bar 14 to the belt shifting mechanism. The bar 14 is pivoted to one end of a lever 25 pivoted at 26 to a suitable part of the main frame, and having its opposite end preferably ofi'-set, as shown at 27 to normally project into the cam and its adjuncts.

path of movement of one arm of a band spring 28. The band spring is normally fixed by one of its members to the main frame 1, and when it is engaged by the end of the lever 25, the said spring is under ten sion and locked against movement. Adjacent the band spring 28 I have, in the present instance, arranged an arm 29 which is fixed to the auxiliary rod 23 and is normally in close proximity to and in the path of movement of the free end of the band spring so that in case the lever 25 is moved out of engagement with the band spring, the latter being released will expand, thus striking the arm 29 and causing the desired move ment of shifting the belt to be transmitted 'to the main rod 22. y

In describing the operation of the device, it will be assumed that the machine is runni-ng and the sliver or slivers are traversing the guides in the plate 3 to be fed into the drawing frame or other machine of like character. Under the foregoing conditions the several detectors 5 are each resting upon one of the ends or slivers and are thus held out of contact with the trip arms 9 as will be understood. WVith the machine thus operating under normal conditions, the rod 7 is balanced by. the control device therefor, and the abutment or striker block 13 is raised out of the path of movement of the striker 15, which is of course continuously reciprocating through the medium of the In case any of the slivers should break or cease to be fed to the plate guide or guides, the detector normally supported by that particular sliver will drop by gravity and its projecting lug strike the adjacent trip arm 9 of the rod 7, thus causing the latter to drop by gravity and bring the block 13 between the bar 14 and striker 15. The block in its new position substantially closes the space between the abutting ends of these two rods, and consequently the striker 15 on its next forward movement impacts with the block 13, transmitting movement to the bar 14 and thus rocking the lever 25. The movement of the lever 25 causes its free end to be shifted to one side of the band spring releasing the latter which immediately springs outward, striking the arm 29, and thereby actuating the auxiliary rod 23 so that the bell crank 24 is rocked and the rod 22 operated to change the belt from the driven pulley to the loose pulley, in consequence of which the machine automaticallycomes to rest.

It will now be apparent that I have devised a complete unitary mechanism for automatically stopping a machine in case one or more of the ends or slivers breaks while being fed, and which furthermore is rendered inoperative until the broken sliver has been repaired or replaced by a new end Attention is further directed to my novel construction of providing a pivoted member or members normally supported by the'moving slivers or strands, but which are inoperative as a part of the knock-off mechanism, until there comes a break in the feeding of one or more of the slivers. F urthermore the mechanism for controlling the stopping of the machine is simple in construction, positive in operation and is effectively controlled by the slivers before they enter the drawing frame, gill box or like machine. It will further be evident that the device is adaptable to substantially all types of doubling, drawing, twisting and roving machines or other machines of like character.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and

of the invention or sacrificing any of its ad vantages.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. In a device of the character stated, the combination of a plate having two rows of openings therein, a detector pivoted adja-.

cent each opening and having a portion projecting between the rows of openings, each of said detectors being normally supported by a sliver passing through the adjacent opening, a rod slidably mounted adjacent said plate and in alinement with the space between said rows of openings, means to normally balance said rod in raised position, a plurality of trip arms carried by said rod and laterally disposed toward said plate, and located respectively in the path of movement of said detectors when released by the breaking of a sliver or slivers, and means controlled by the lowering of said rod caused by the dropping of one or more of said detectors into engagement with said trip arms for automatically stopping said machine.

2. In a device of the character stated, the combination of a fixed plate having a plurality of openings therein, a detector pivoted adjacent each opening and having a portion projecting between juxtaposed openings, each of said detectors being normally supported by a sliver passing through the adjacent opening, arod slidably mounted adjacent said plate and in alinement with the space between said openings, means to normally maintain said rod in raised position, a plurality of laterally disposed trip arms carried by said rod and located respectively below and in the path of move-' ment of said detectors, and means controlled by the lowering of said rod, caused by the release of any of said detectors, for automatically stopping said machine.

of the opening, each of said detectors being normally supported by a sliver passing through the adjacent opening, a rod slidably mounted adjacent said plate and in aline-,

ment with the space between said openings, means to normally maintain said rod in raised position, a plurality of laterally disposed trip arms carried by said rod, each trip arm having a portion located below and in the path of movement of a pair of said detectors, and means controlled by the lowering of said rod, caused by the release of any of said detectors, for automatically stopping said machine.

4:. In a device of the character stated, a fixed plate having a plurality of openings to guide-a number of slivers, detectors pivoted upon said plate respectively above said openings and each having'a laterally disposed extension projecting to one side of the adjacent opening, each detector being normally supported by the sliver passing through the respective plate opening, a rod movably mounted in a position to be controlled by all of said detectors, means to name this 26th of January, A. D. 1914.

JOSEPH o. PRATT.

In the presence of JAS. F. GREEN, R. WALTER ORAMP.

Copies of this patent may be obtained for five cents each, by addressing the -".Gommissioner of Patents,

Washington, D. G. r

Images