US1812206A - Driving and controlling mechanism of looms for weaving - Google Patents

Description

June 30, 1931. J. I -I..-HINDLEVVET AL DRIVING AND 'GQNTROLLING MECHANISM OF LOOMS FOR WEAVING Filed Feb. 19, 1930 5 Sheets-Sheet l June 30, 1931. J. HINDLE ET'AL DRIVING AND CONTROLLING MECHANISM of LOOIIS FOR WEAV'ING Y Filed Feb. 19, 1930 1 5 Sheets-Sheet 2 \NVENTORS.

- 32 Q9. mow mw J. H. HIINDLE' ET AL DRIVING AND CONTROLLING MECHANISM OF LOOMS FOR WEAVING Filed Feb. 19, 1930 s-sheezs-sneei s fi d 4 Patented 7 June .30, 1 931 UNIT-E I HENEYHINPPEJWP more mma mama r reen DRIVING AND com mmmmer or s me F WE V N Application filed rem-mm, 1930, Serial No. 4293726, and in Great Bri tain hpri1 25,'1929 .r v

This invention relates to looms such as are' employed for weav ng heavy wide fabrics of cotton, wool or other-fibres in which the slay 1s mounted on anumber off-intermediate slay e swords and actuated by a cor-responding hum-i ber of cranks and supported by intermediate frames.

In such looms which may be. up to 400 inches or more in Width the mechanism for 11 protecting the warp in case-the shuttle re- 7 mains an the shed consists of a number ofv frogs which automatically come into .actlOIl', agalnst anvabutment if the shuttle ffails to arrive 111 its box, and arrestthe motion 1;? of'the loom abruptly, heavy springsv being employed to take up theshockr Further;

the, driving power actuating the loom only" with the mechanical knocking ofi motion 'ed fcontactors. Y

'lr'zngthwith abreast beam land a slay 2,

supportedon a plurality of slay swords 3;

heretofore employedand to provide an effective electrical drive for the loom, thereby facilitating the "combinationtherewith or an electric warpprotection mechanism,-

which brings the slay-to a standstill without any vmechanical shock whatever in a safeposition to'avoid damage to the cloth, should 9. the shuttle fail to enter theshuttle box, and

I likewise to disconnectthe driving force simulf taneously at the commencement of the' op eration of stopping the loom.

'magnetsH which on being demagnetizedinf r istantly release the shoes G and allow'the;

According to the inventiongthe drivingof i is: the loom is controlled by anelectriccurrent the circuit of which is timed to be broken at each revolution as the shuttle should enter v applied on the shuttle box an auxiliary or bypass cireacl1 shuttle "box, v thereby maint'aining' the circuit of the electriccurrent which actuates brings the loom to rest.

' i i The invention'will be fully describedwith D "driven by the :Figr 1. is an end elevation of loom constructed 1n. accordance wlththe 111VGI1t1OIL- Fig. 2 lsa front elevat on of cam operatf Fig. '3 is a side elevation partlyQ-in section; TF-ig. l isa perspective view of cam shaft. Fig. 5 is a wiring diagram; I V

The loom is constructed of any desired a crank shaft A with any required: number of cranksand a picking motion 5 with picker stick G-at eachend a-1l' of'known construe-f tionv r' A, An electric motor A isimounted on the gable" B and coupled "by a jmagnetic clutch-fl) through suitable gearsd'toa crank'shaft 4: or intermediate shaftfrunning longitudis nally of theloom and to; other-operativeparts of'the loom. The magnetic" clutch D-is of known construction 'andope'r'ated by adi--" rect' currentlfrom a" small 'D. generator main motor A or" other source'ofpower; 1 1

An electromagnetic brake G fittedon the crank Sharer, or ona shaft-e geared therewith, comprises adrum F withtwo shoes G one .at either side drawn together by strongq spring 9 and held off by powerful electrobrake 'to beappliedl The magnetic clutch D and the brakemagnetsHjare 0n thesame 3 electric circuit so that they act simultaneous- 8 ly the brake being released and the clutch engaged on closing the circuit and vice versa l cuit on the entry of the shuttle therein being I closed by two additional switches, one on the clutch being disengaged and the brake A t peningfor breaking of th circuit. 5

TheDLC,currentvrequlredls a compara- 9 tivelyweak current of say' 110 :volts and mayzrj V {be obtained from a small generator'ID- on e i we the loom or *from; an-independe-ntsource io'fi. simultaneously a magnetlc clutch through Y which the power i's'transmitted-eto the loom;

and also. brake magnets which release a-pow erful brake, the'closing of which rapidly power.

:areplaced thefcam m of. which .kisfrotated .i reference to the accompanying drawings :fofthe. loom such as the crank shaft 4.{ The by a chainor-gear's, from any rotarylpart contacts M, M are timed to open alternately after each pick and break the circuit, the contact M as the shuttle should enter the right hand shuttle box and the contact M as the shuttle should enter the left hand shuttle box, and consequently should the shuttle fail to enter either shuttle box the loom is promptly stopped by the disengaging of the magnetic clutch D and the simultaneous application of the electro-magnetic brake G.

The terminals of each of the cam operated cont-actors M, M are connected or short circuited by an auxiliary or bypass circuit N carried to the right hand shuttle box and an auxiliary or by-pass circuit N carried to the left hand shuttle box. The circuits N and N are in parallel. Switches n and n are fitted to the auxiliary or bypass circuits N N on the shuttle boxes respectively. These switches n and n are normally open but are closed by the movement of the swell as the shuttle enters the box and opened as the shuttle leaves the box. Thus at any time only one swell switch it or n is eii'ective in determining whether the loom shall continue to run, and this switch is that to which the shuttle is being sent. If the shuttle does not arrive in the particular box, the circuit is broken, even though the swell of the other box is held out by a broken stick or picker, and the loom is stopped almost instantaneously and without shock, preventing any possibility of damage to the warp, shuttle or reed. As the shuttle enters the box the auxiliary or bypass circuit N or N is closed so that the current in the main circuit N is not broken by the opening of the cam operated contactors LI or M and the loom continues to run.

A starting switch P with a no-volt release is inserted in the main circuit N and additional stop switchesmay be inserted at one or both ends of the loom or other places in the main circuit.

For extremely wide looms a modification of the electrical connections may be adopted, whereby the loom comes to a standstill as the shuttle is discharged from one box and auto matically re -starts when the shuttle arrives at its destination in the opposite box. In such an arrangement the contactors M M are so timed that the circuit is broken and the loom stopped at a predetermined period after the shuttle has left the shuttle box.

Provision may also be made to short circuit the cam contacts or alternatively to short circuit the swell switches to enable the loom to be run without the shuttle picking. across and also the brake may be independently released, by meansof a switch suitably connected.

What we claim as our invention and desire to protect by Letters Patent is 1. A loom constructed with an electric con trolling circuit, a magnetic driving clutch and an electro-mechanically released brake in the same circuit functioning simultaneously, contactors to make and break the circuit, means to operate the contactors alternately at successive boxings of the shuttle timed to break the circuit when the shuttle should enter its respective shuttle box an auxiliary by-pass circuit leading to each shuttle box, and a switch thereon closed by the entry of the shuttle into the box to maintain the circuit intact.

2. A loom constructed with an electric controlling circuit, a magnetic driving clutch and anelectromechanically released brake in the same circuit which function simulta neously, contactors to make and break the circuit, a cam to operate the contactors alternately timed to break the circuit at each successive boxing of the shuttle, an auxiliary bypass circuit leading to each shuttle box, and a switch thereon closed by the entry of the shuttle into the box to maintain the circuit intact.

3. A loom constructed with a magnetic driving clutch an electro-magnetic brake, a main electric controlling circuit passing through the clutch and brake which act simultaneously to start and stop the loom, a cam operated contactor timed to break the circuit when the shuttle should enter a box, an auxiliary by-pass circuit to each shuttle box and a switch thereon ope ated by the shuttle as it enters the box to maintain the circuit.

4-. A loom constructed with a magnetic clutch by which it is driven, an electro-magnetic brake to stop the loom both on the same electric circuit to operate simultaneously, contactors operated alternately from a rotating part of the loom to open and break the circuit at any predetermined position of the shuttle, an auxiliary by-pass circuit to each shuttle box normally open and a switch thereon connected to the swell of the shuttle box operated to complete the circuit on the entry oi a shuttle into the shuttle box.

In testimony whereof we have hereunto set our hands.

JOHN HENRY HINDLE. THOMAS HINDLE.

Images