US1579861A

US1579861A - Driving mechanism for straight-knitting machines

Info

Publication number: US1579861A
Application number: US634911A
Authority: US
Inventors: Eisenschiml Max
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-04-26
Filing date: 1923-04-26
Publication date: 1926-04-06
Anticipated expiration: 1943-04-06

Description

April 6 1926. 1,579,861

M. EISENSCHIML DRIVING MECHANISM FOR STRAIGHT KNITTING MACHINES Filed April 26, 1923 3 Sheets-Sheet 1 April 6, 1926. 1,579,861

M. EISENSCHIML DRIVING MECHANISM FOR STRAIGHT KNITTING MACHINES Filed April 26 1923 3 Sheets-Sheet .2

April 6 1926. 1,579,861

M. EISENSCHIML DRIVING MECHANISM FOR STRAIGHT KNITTING MACHINES Filed April 26, 1925 3 Sheets-Sheet 5 Patented Apr. 6, 1926.

UNITED STATES MAX EISENSCHIML, OF ASCH, GZECHOSLOVAKIA.

DRIVING MECHANISM FOR STRAIGHT-KNITTING MACHINES.

Application'filed April 26, 1923. Serial No. 634,91 1.

To all whom it may concern:

Be it known that I, -MAX ErsmvsoI-nML, a

citizen of the Republic of Czechoslovakia, and resident of Asch, Czechoslovakia, have invented certain new and useful Improvements in Driving Mechanism for Straight- Knitting Machines, of which the following is a specification.

My present invention relates to a driving mechanism for straight knitting machines and has for its object to convert a hand driven knitting machine of such kind into a motor driven machine, at the same time to enable the said mechanism to be applied to a machine of such kind without difficulty, whether the machine is mounted on a frame or stand or on a table, and to adapt the apparatus operatingthe carriage of, the ma.- chine to any stroke i. e. to any width of the straight knitting machine.

For such purpose the unitary driving mechanism comprising an element adapted to stop the machine not only after a predetermined number of revolutions of. the driving shaft but also. in the event that the knitting thread breaks or exhausts, is com: bined with an endless member preferably a chain operated by the said driving shaft, means being provided adapted to be reciprocated by the endless member and further means, whereby the carriage of the knitting machine will be engaged by the first named means and disengaged from the same.

Another feature of the invention consists in the provision of means to ad ust the second named means according to the stroke of the carriage of the knitting machine.

Referring to the accompanying drawings forminga part of thisspecification Fig. 1 is a side elevation of the unitary driving mechanism and Fig. 2 is an elevation partly in section. Fig. 3 is a front elevation ofthe chain gear. Fig. 4 a "plan view of the same.

' Fig. 5 is a cross section'and'Fig. 6 is a detail elevation partly in section. c

The frame 1 of the additional unitary mechanism is secured as shown at 2 to the supporting frame 3 of the well known straight knitting machine, which being heretofore driven by hand is now converted into I a motor driven machine. The frame 1 sup ports in suitable bearings 4 the driving shaft 5, on which is loosely mounted a driving pulley 6 which may be driven by a belt or the like from a source of power not shown.

The hub 8 of the pulley'6 forms theright hand or fixed portion of an ordinaryclaw left hand or a clutch, the movable portion of.

which is formed by a collar 9 which can be ioved along the shaft 5 but will be revolved therewith by a. key 7. A spring 10 tends to move the collar 9 into engagement with the hub 8. On the c'ollar'9 is loosely mounted a toothed or ratchet wheel 11, which is provided at one side with teeth 12 having sloping faces which are engaged by pins-l3 of the collar 9. Normally the wheel 11 revolves withthe collar, the latter engaging the hub 8. "If the wheel is to be checked by a pawl 20 in themanner hereinafter described the pins 13, owing to the fact that the collar 9 is continually revolved by i spring pawllfcngaging a flange '15 of the collar 9. q A handle. 16 enables the pawl let tobe released, so that the collar 9, constituting the movable clutch portion will be moved in engagement with the hub 8 constituting the fixed clutch portion by the spring 10.

The wheel ll'may be checked by a pawl 20 the rear arm Qlof which projects under a' lug 22 of a lever 23. Said lug, is cam shaped at its lower edge and provided there at with two cam portions arranged in different. levels. The lever 23 is connectedby a wire24 or the like with the known thread guard (not shown). If a knitting thread breaks or exhausts the said thread guard by means of the wire 2& moves the lever 23 towards the'left, wherebythe armQl is alprovided. A known ratchet device 26 causes the pattern chain to be stepped at each'revolution of the shaft 5, a retaining pawl 27 preventing the return movement. On the pattern chain 25 one or more buttons 28 may be secured, the positions of which correspond-tothe points at which the pattern changes. Said button 28 acts upon a bell The Y collar 9 is held in disengaged'position by a crank lever 29 which in turn forces the lug 22 and the lever 23 to the left, so that the clutch (8, 9) will be released as hereinbefore described.

l 'he driving shaft 5 transmits its motion as by means of

chain wheels

30, 32 and chain 31 to a shaft 33 mounted in a suitable bearing of a frame 34, which is mounted at the rear side of the knitting machine, of which theangular support of its carriage is illustrated, so that the latter may for the sake of discussion represent the carriage it self. The shaft 33 drives a chain gear which serves for reciprocating the carriage. Said chain gear comprises a chain wheel 36 secured to the shaft 38, av chain wheel 37 secured to a shaft 38 which is mounted in the frame 34 and an endless chain 39. The chain 39 causes the carriage '35 of the knitting machine to be reciprocated in the same manner as has been effected hitherto by the well known crank mechanism.

Since the said chain gear has only reduced height, it may be mounted directly upon the table supporting the entire knitting machine even when the carriage performs the largest stroke. This would be impossible with crank mechanism because the crank would be too long.

The frame 34 carries guiding

rods

40 and 41, on which a slide 4:2 may be reciprocated in a path being parallel to that of the carriage. The chain 39 traversing the slide is provided with a single pin43 which engages two vertical iron bars 44 slidably arranged and held in the slide. Said bars 44 move the slide and distribute the pull exerted by the chain so that jamming of the slide on the guiding

rods

40, 41 will be prevented.

The slide or traveler 42 is providedwit-h a drag bolt 45, which is guided in a vertical direction, a spring 46 tending to move the drag bolt downwards. The bolt 45 being moved by the slide performs a stroke which exceeds the stroke, of the carriage in both directions. The head 47 of the angu-- lar support 35 firmly secured to the carriage is bevelled ofi at both sides as at 48 and is provided therebetween with a hole 49. The bolt moving towards the head 47 rises along the sloped or bevelled portion 48- and then enters the hole 49, whereby the carriage will be dragged. Before the carriage arrives at the end of its stroke the bolt 45 will be lifted and; drawn out of the hole 49 so that the carriage comes at rest at the end of its stroke, whereas the slide 42 and bolt continue theirtravel in the same direction and then return in the opposite direction. 1

The bolt 45 will be released in the following manner:

The frame 34 supports at its top two rails 50' and 51 between which the upper end of the bolt projects beyond such rails. In

the said end a trausversal pin is slidablv mounted, so that it can be moved lengthwise or at right angle to the bolt. In one of the two positions the pin 52 slides only with one of its ends (niche of the rails (for example on 50) and in theother position only with the other end on the second rail (51). On the said

rails

50, 51 brackets 53, 54 respectively are slidably and adjustably mounted, and each of said brackets carries a ram 56 respectively and a curved spring plate 5?, 58 respectively.

it will be assumed that the pin 52 of the bolt 45 runs upon the rail 50. If now said pin rises to the summit of the cam 55 the holtQlfi will be 'aised and then being lifted clear of the hole the carriage (85} will be stopped. The bolt continues its travel in the sai'ne direction, whereby the end 'of the pin 52 will be forced inwards by the spring plate 57, so that said pin will he moved into the reversed position. In the latter position the pin slides on the other rail 51 until it reaches the other cam 56 and then the described operation repeats at the other side of the frame 1. As seen the distance between the two cams and 58 corresponds to the stroke of the carriage, and by changing the positions of the brackets or

cams

55, 56, i. e. by moving the brackets along the rails or by reducing or increasing the distance between the two cams the chain gear may be adjusted according to any width of the knitting machine or to every stroke of the carriage.

In addition'to the advai itages above specified the chain gear allows that for changing the adjustment only the bracketshii, 54 are to be shifted along the

rails

50, 51, whereupon said brackets will be secured in their new positions as by means of a set screw 59, but the operations of separating and 0011- necting two elements (crank and connecting rod) as hitherto practised will be dispensed with.

lVhat I claim is:

1. In a driving system :a' unitary driving mechanism for converting a hand driven straight knitting machine with rectilinearly movable carriage into a motor driven one, said mechanism comprising a driving shaft, a clutch between the drivingshaft and the carriage of the knitting machine, means comprising an element-which after a predeter-' mined number of revolutions of the machine or in the event of a thread rupture will be checked, so as to cause the clutch to, be thrown out of mesh, an endless chain actuated. by the said driving shaft, meansadapted to be re'ciprocat'ed by the chain, means whereby the carriage of the knitting machine will be engaged by the said reciprocated means and disengaged therefrom.

2-, In a driving system a unitary driving mechanism for converting a hand driven straight knitting machine with rectilinearly movable carriage into a motor driven one, said mechanism comprising a driving shaft, a clutch between the driving shaft and the carriage of the knitting machine, an element for throwing said clutch out of mesh, after a predetermined number of revolutions of the machine, or if a knitting thread breaks an endless chain actuated by the said driving shaft, a traveller being moved by the chain and guideson rails parallel to the path of carriage of the machine, a drag bolt on the traveller which bolt is adapted to engage the carriage and means to disengage the drag bolt from the carriage.

S. In a driving system a unitary driving mechanism for converting a hand driven straight knitting machine with rectilinearly'i movable carriage into a motor driven one, said mechanism comprising a driving shaft, a clutch between the driving shaft and the carriage of the knitting machine, an element for throwing said clutch out of mesh, an endless chain actuated by the said driving shaft, a traveller being moved by the chain and guided on rails parallel to the path of carriage of the machine, a drag bolt in the traveller, which bolt is adapted to engage the carriage and having a transverse pin shiftably mounted in the bolt, a bracket at each end of the carriage stroke, each of said brackets being provided With a cam adapted to disengage the bolt from the carriage, and a curved plate adapted to shift the said pin longitudinally, said brackets being mounted adjustablv on fixed rails for the purpose of enabling the stroke of the carriage tobe'advided with sloped faces at both'its ends and with a hole therebetween, a traveller being reciprocated by the endless chain, a spring urged drag bolt on the traveller capable of entering the said hole, adjustable brackets each provided with a cam for lifting the said drag bolt so as to be clear of the said hole and with a curved plate, a transversal pin mounted in the drag bolt and capable of being shifted lengthwise by the said curved plate for the purpose of enabling the drag bolt to cooperate with the cam at the opposite side of the machine.

In a knitting machine with a rectilinearly reciprocated carriage, a driving shaft, an endless chain, a head 011 the car- I riage provided with sloped faces at both its ends and with a hole therebetween, a slide being reciprocated by the endless chain, a spring urged drag bolt on the slide capable to enter'the said hole, adjustable brackets each provided with a cam for lifting the saiddrag bolt so as to be clear of the said hole and with a curved'plate, a transversal pin mounted inthe drag bolt and capable to be shifted lengthwise by the said curved plate for the purpose of enabling th-edrag bolt to cooperate with the cam at the opposite side of the machine.

In testimony whereof I affix my signaure.

' YMAX EISENSC-HIML.