US2952147A - Means for attaching yarn ends in tubular fabric - Google Patents

Description

Sept. 13, 1960 E. R. ZlEMBA 2,952,147

MEANS FOR ATTACHING YARN ENDS IN TUBULAR FABRIC Filed Oct. 22, 1958 '4 Sheets-Sheet 1 Flsl I Flcai 3 INVENTOR. L l 4/ [dwaro x2 Ziemba 5/ 76 5/ Y ld w g Y7 7 Sept. 13, 1960 E. R. ZIEMBA 2,952,147

MEANS FOR ATTACK-KING YARN ENDS IN TUBULAR FABRIC Filed 001;. 22, 1958 4 Sheets-Sheet 2 I N V EN TOR. Edward A. Z/emba Evy/Q6",-

E. R. IZIEMBA Sept. 13, 19 60 MEANS FOR ATTACHING YARN ENDS IN TUBULAR FABRIC Filed Oct. 22, 1958 4 Sheets-Sheet 3 I l E INVENTOR. fo'wom' R Z/emba BY ifl7- E. R. ZIEMBA Sept. 13, 1960 MEANS FOR ATTACHING YARN ENDS IN TUBULAR FABRIC Filed 001.. 22, 1958 4 Sheets-Sheet 4 INVENTOR. I fowara A. Z/emba By Q4 HH HH wua hfl United States Patent MEANS FOR ATTACHING YARN ENDS IN TUBULAR FABRIC Filed a. 22, 1958, Ser. No. 768,869

6 Claims. (CI. 66-43) This invention relates to improvements in circular knitting machines having a plurality of feeding stations for knitting multi-feed fabrics in rotary motion and more particularly to means for controlling the operation of such machines to secure the yarn ends in the fabric when the feeding stations are placed in or taken out of operation. f

In such machines the circle of needles moves through aknitting wave at eachfeeding-station. Yarn feeding means are provided at each feeding station, such feeding means including one or more yarn fingers movable between active and inactive positions to position a yarn to be taken by the needles or to remove it-therefrom, respectively, yarns so removed from action being severed and the yarn end extending from the finger held by clamping means. When one yarn is substituted for another yarn at a feeding station the ingoing and outgoing yarns are usually overlapped on a few of the needles to prevent the free ends of the yarns from pulling out of the fabric. Wherehowever, the machine is knitting multifeed and'a knitting station is taken out of action while knitting continues at one or more of the other stations, the free end of the yarn extends loosely from the last loop formed at the inactivated station. Consequently, when tension is applied to the fabric, as usually occurs in use, the free end will partially withdraw thereby permitting stretching or enlargement of the last or last few loops creating an. undesirable opening in the fabric. A similar defect occurs when a previously inactivated knitting station is put into action in the course of the knitting operation.

The principal object of the invention is the provision of means for operating a circular knitting machine in the production of multi-feed fabric for overcoming the above mentioned and other difficulties.

Another object of the invention is the provision of means for operating a circular knitting machine in multifeed rotary knitting to secure the free end of a yarn moved into or out of knitting action by interlocking said free end with a yarn knitted at an adjacent feed.

A still further object of the invention is the provision of a multi-feed knitting machine having means for controlling the needles at a feed to be inactivated to cause the free end of the yarn removed from knitting action to be caught into the fabric at a point spaced at least one needle wale from the last loop formed at the inactivated feed.

Still another object of the invention is the provision of means in a multi-feed knitting machine having means for controlling the operation of the needles at a feed to be activated or inactivated whereby at least the first or last needle, respectively, operating at that feed takes yarn but does not knit the same, said one needle taking and knitting yarn at a subsequent feed.

With these and other objects in- View, which will become apparent from the following detailed description of the illustrative and practicalembodirnent of the invention shown in the accompanying drawings, the invention comprises the novel elements features of construction and combination of parts in cooperative relationship as hereinafter more particularly pointed out in the claims.

In the drawings:

Figure 1 is a diagrammatic top plan view of a multlfeed knitting machine with the mechanism of the instant invention incorporated therein;

Fig. 2 is a sectional view on an enlarged scale taken on the line 22 of Fig. 1;

Fig. 3 is a sectional view taken substantially on the line 3-3 of Fig. 2;

Fig. 4 is a sectional view on an enlarged scale taken in the direction of the arrows 4-4 on Fig. 3;

Fig. 5 is a top plan view of the mechanism of Fig. 4 taken in the direction of the arrow 5;

Fig. 6. is a view similar to Fig. 5 but with the parts being shown in different positions relative to Fig. 5;

Fig. 7 is a sectional view taken substantially on the line 7--7 of Fig. 2;

Fig. 8 is a developed view of the jack raising and needle cam structure of the machine of Figs. 1 and 2;

Fig. 9 is an enlarged view of a portion of one of the jack raising cams of Fig. 8;

Fig. 10 is a diagrammatic view illustrating the movements of the needles through a cycle at a knitting station when the knitting station is taken out of action;

Fig. 11 is a view similar to Fig. 10 diagrammatically illustrating the movements of the needles when a knitting station is put into action; and

Fig. 12 is a diagrammatic illustration of the loop formation of a piece of knitted fabric illustrating the mode of tying in a yarn end, as viewed looking outwardly from the interior of the needle cylinder of the machine of Fig. 1.

Referring now to the drawings and more particularly to Figs. 1 and 2 there is shown a portion of a multi-feed circular knitting machine of the type disclosed in the copending application of Benjamin Franklin Coile, Serial No. 329,801, filed January 6, 1953, and in the corresponding British Patent 790,141, published February 5, 1958, hereinafter referred to collectively as the Coile disclosure. While, as will be apparent, the instant invention may be incorporated in multi-feed machines of different types, the machine of the Coile disclosure has been selected for purposes of illustration and reference may be made thereto for details of the machine construction and operation not specifically described herein. The machine includes a rotatable needle cylinder 15 having usual slots therein for receiving a circle of independently operated pivoted latch needles 16, the needles cooperating with sinkers 17 in forming courses of a knitted fabric at each of a plurality of knitting stations indicated generally at 20 to 23. While four knitting stations are shown it will be understood that a greater or lesser number may be employed.

Supported adjacent each of the knitting stations are yarn feeding means 25 each suitably including a plurality of yarn fingers 26. Each yarn finger is movable between a lowered active position in which it feeds yarns to the needles 16 selected to knit at such knitting station and an upper inactive position. Also associated with the yarn feeding means 25 at each knitting station is a yarn trapping or clamping and cutter device illustrated diagrammatically at 27 in Fig. 1 which is mounted in fixed position centrally of the needle cylinder 15.

In the machine selected for illustration there is provided one or more jack cylinders 30 in alignment and rotatable with the needle cylinder 15, the jack cylinder, carrying master jacks 31 and pattern jacks (not shown) adapted for vertical movement in aligned slots in the l cylinders- A master jack 3:1 is provided for each needle 16 and between the upper ends of the master jacks and the lower ends of the needles lifters 32 are provided for transferring raising movements of the jacks to the needles. The movements of the needles 16 through yarn taking and knitting waves at each of the knitting stations is caused by needle and jack cam assemblies illustrated more particularly in Figs. 8 and 9, the cam assemblies being carried by portions of the machine fixed relatively to the needle and jack cylinders 15 and 3.0, respectively, as is usual. In the construction illustrated the assemblies are arranged to move the needles through knitting waves in both directions of rotation of the needle cylinder whereby the machine is adapted for both rotary and reciprocatory operation. However, inasmuch as the instant invention is directed to improvement in rotary or round and round knitting, the cams which manipulate the needles and jacks in only one direction of movement of the needle cylinder, namely, the forward direction illustrated by the arrow, need be considered and will be specifically referred to although it is to be understood that cams operating in .a similar manner are provided for the reverse direction of knitting.

Each needle cam assembly includes a center cam 35 having carn faces 36, and a pair of stitch cams 37- having cam faces 40, a cam face 36 and a stitch cam operating on the needles in each direction of reciprocatory movement of the needle cylinder. At the master jack level illustrated there is provided jack raising cams 41 having cam faces 42 and each cam face 42 is provided with a horizontally extending shoulder or step 45 corresponding to step 625 of said Coile disclosure and a lateral camrning surface 44 (Figs. and 6). Jack raising cams 41 are of a height to raise the needles 16 to the latch clearing level at which fabric loops of a previous course held on the needles are moved below the needle latches. Step 45 is so located on the cam 41 that butts 46 of certain of the jacks 31 may be moved from the cam faces 42 when the needles are raised to a yarn taking but not latch clearing level as hereinafter set forth. The jack cam assemblies also include jack lowering or resetting cams 47 adapted to return the jacks to their original lowered positions.

As illustrated in Figs. 2 and =8, jacks 31 are of the type to rock about a fulcrum 50 between a position in which their lower ends are swung outwardly to cause their butts 46 toride up the cam face 42 of cam 41 and an inactive position in which the butts ride in back of the cams and are not raised. thereby. In order to inactivate a knitting station and to maintain it inactive for a desired period, pattern controlledmeans are provided to hold the jacks in their inactive position at the proper times. Such means include guard cams 51 (Figs. 2, 7 and 8) between the several knitting stations each comprising preferably a double lobe to be operative in both directions of movement of the cylinder 15, the lobes being formed at the free end of an arm 52 of a lever 55 which is pivoted for swinging movement on a stud 56. A second arm 57 of the lever 55 is connected through a link to an arm 61 of a lever 62. Lever 62 is pivoted at 65 and includes a second arm 66 having a follower portion 67 adapted to be engaged by one or more cams 70 carried by one or the other of two main pattern drums 71 whereby guard cams 51 may be moved into and out of operative position under the control of the pattern drums. The jacks 31 are rocked in the other direction when permit-ted to do so by withdrawal of the guard cams 51' to move the butts 46 into position to ride up the cam faces 42 of the cams 4-1 through the medium of presser cams, portions of which are shown at 72 in Fig. 2, the presser cams being supported for swinging movement into and out of contact withtheupper ends of the jacks under pattern control. The presser cams and their operating structure are not shown in detail herein butreference may be made to the Coile disclosure for. such details. It may be said however that SllQh cams and their operating mechanisms substantially duplicate the guard cams and their operating mechanisms, the time of the operation of the presser cam being determined by cams similar to cams 70 on the pattern drums 71.

In addition to the jack selecting devices described above, the Coile disclosure provides means at each of the jack levels to select the pattern jacks of individual needles at the various knitting stations during reciprocatory knitting. Also provided at each of the knitting stations are means for engaging the butt 46 of the leading jack .3 1 selected by the jack selecting devices during reciprocatory knitting in the direction of movement of the cylinder 15 to move such butt from the cam face 42 of the cam 41 at the level of the step 45, whereby the needle operated by this jack is only raised to yarn taking level. The means for this purpose includes a knocker lever 75 pivotally. mounted on a pivot pin 76 carried in a bracket 77 which is secured to the cam 41 (Figs. 4, 5 and 6) there being a similar knocker lever for both the forward and reverse directions of knitting at each of the knitting stations. However, in the rotary operation of the machine, with which the instant invention is concerned, the selection of the pattern jacks and the knocker levers. 75 are not required and a detailed description thereof will be omitted.

In the operation of the machine described above for multi-feed rotary knitting the guard and presser cams located in advance of each knitting station are shifted, under the control of one or the other of the pattern drums 71, into inoperative and operative positions, respectively, whereby the jacks 31 are moved to engage and ride up the cam faces 42 of the respective cams 41 at such knitting station and raise their associated needles to latch clearing height to position the previously formed loops below the latches, the jacks then being returned to their lowered positions by the resetting cams 47. The needles 16 then proceed through the remainder of their knitting wave under the control of center cam 35 and stitch cam 37, the needles taking yarn from an activated yarn finger 26 at each such knitting station and forming it into a course of stitches.

From time to time in the formation of the fabric it may be desirable to reduce the number of knitting stations in operation or, if less than all of the knitting stations are in operation, to increase the number. Considering, for example, the case where a knitting station is to be removed from operation, at the proper time and under the control of the pattern drum, the pressure cam 72 associated with such station is withdrawn from operative position and the guard cam 51 is moved into operative position whereby the lower ends. of the jacks 31 are moved inwardly to pass behind cam 41 and the needles no longer are raised to take and knit yarn at the station. At the same time the yarn finger which has been in an active yarn feeding position is raised and, as the cylinder continues to rotate, the yarn extending between the last formed stitch and yarn guide is carried into the clamp of the clamp and cutter device 27 and the cutter is operated to sever the yarn between the clamp and fabric, the loose end of the yarn then being connected to the fabric at the interior thereof. If an inoperative knitting station is to be placed into operation a similar series of events takes place but in reverse order, namely, the guard cam 51 is withdrawn and the presser cam 72 moved into operative position to cause the jacks 31 to ride up the raising cam 41 and at the same time a yarn finger, which has been in inoperative position with the end of the yarn fed thereby held by the clamp, is lowered into operation. Thereafter the needles take andknit the yarn into a course of loops and, as the cylinder continues to rotate, the yarn end is pulled-out of the clamp and is carried with the fabric.

The instant invention now to be described provides a means of tying or locking the loose end of yarn extending ffomihe last knitted loop of a coursein'the case of a knitting station going out of operation or from the'first knitted loop of a course when a knitting station is placed into operation. For this purpose means are provided for causing a terminal group of needles preferably'betwe'eh two and four needles to rise at such knitting station to take yarn without knitting the same, said group of needles however taking and knitting yarn at the next operative 8 and 9, and the needles associated therewith. 'While the mechanisms are identical in structure at the different knitting stations, the control means therefor differ to some extent in order to accommodate certain physical features of the machine. For the present purposes it will be assumed that knitting station 23'is to be inactivated and the mechanism'associated with the station will be. specifically described. A lever 81 pivotally mounted on a stud 82 carried on the bracket 77 for the knocker lever 75 for the forward direction of knitting, is provided with an arm 85 extending inwardly toward jack cylinder 30. Arm 85is provided'with a nose portion 86 which is adapted to be moved along'a path parallel to the inclined cam face 42 of the raising cam 41 to a position in the path of the butts 46 of the jacks 31 to force them from the cam face of the cam at the level of the step 45 in a manner similar to the movement of the jack by-the knocker lever 75. However, where the knocker lever 75 is adapted to engage only the leading one of an active group of jacks 31 to move it from the cam 41 and then is raised to inactive position by the trailing jacks of the group, the nose portion 86 of the arm 85 is moved to position to engage a plurality of the leading jacks or the trailing jacks, the number of jacks being preferably two to four as hereinbefore set forth althougha greater number than four may be engaged depending on the length of time the nose portion is in active position.

The lever 81 and nose portion 86 is moved between an inactive position of Fig. and an active'position of Fig. 6 into the path of the butts of the jacksjlfby-a pin 87 which is adapted to engage between arms 90 of a forked portion 9'1 of the lever (Fig; 4). Pin 87 is carried in one arm 92 of a lever 95 which is pivotally mounted inter-mediate its ends on a stud 96 carried in a fixed position on the machine (Figs. 3 and 4). A second arm 97 of the lever 95 is connected by a link 100 to one arm 101 of a bell crank 102 pivoted at 105 on a post 106 (Fig. 3). A second arm 107 of the bell crank 102 is provided with a follower portion 110 adapted to ride on and off of a cam 111 on a pattern drum 71. Normally the follower portion 110 of the lever 102 is in engagement with a cam 111 to maintain the lever 81 in inactive position and the lever 81 is moved to active position (Fig. 6) when the follower portion drops off of the cam. The lever 95 at knitting station 22 is connected by a link 100 to a bell crank 102 in the same manner as at station 23. At knitting station 20, lever 95 is connected by a link 108 to an intermediate pivoted bell crank 109 which in turn is connected by a link 100 to a lever113 having a follower portion 114 for engagement with a cam or cams 111 on a pattern drum 71. The lever 95 at knitting station 21 is similarly connected by a link 100 to a lever similar to the lever 113. The inactive positions of the levers 81 are determined by engagement. of stop arm portions 112 with pins 115 in the brackets 77 (Fig. 5) and springs 116 connected between the bell crank 102 and lever 113 (Fig. 3) and fixed parts ofthe machine biases the follower portions of the bell cranks and levers toward the pattern drums 71 and to move the levers 81 to active positions against stop pins 117 in the brackets (Fig. 6) when the follower portions drop off the cams 11L I In the operation of the mechanisni of the instant in vention when theknitting station 23 is to be removed from action, the pattern drum 71 is advanced to cause the associated presser cam 72 and guard cam 51 to move out of and into operative positions, respectively, so that jacks passing the guard cam thereafter will miss the raising cain 41. This operation is timed by proper positioning of earns 70 on drum 71 to define a particular point in the circle of needles 16 at which knitting stops. During the same movement ofthe pattern drum a cam 111 is moved from beneath the bell crank 102 and the spring 116 acts to swing lever 81 and move nose portion '86 into the path of the butts 46 of the jacks 31 of the terminal group so that as they are raised by the cam 41 these jacks are forcedoif the cam' at the level of the step 45, this movement of the jacks being aided by the camming surface 44. This action terminates the upward movement of the terminal needles indicated at 118 in Fig. 10. The yarn finger 26 also under pattern control is raised to its inoperative position after it has fed yarn to the last needle of the terminal group, the yarn trailing from the finger, as the cylinder continues to rotate, being carried around the terminal needles to the interior of the needle cylinder 15 where it is clamped and cut. Inasmuch as the group of terminal needles are raised only to yarn taking height by their jacks, the yarn taken by these needles is not knit but lies along the needles of the terminal group and passes around the last needle to the interior of the cylinder. As the terminal needles reach the next active knitting station they are moved through the knitting cycle and the yarn end which passed around the last needle is caught or locked into the fabric by the loops formed at the active knitting station.

The fabric obtained by the above described operation is illustrated in Fig. '12. In said figure the rear or inside face of the fabric is 'viewed. As shown yarn 120 has been knitted at knitting station 23 taken out of action forms its last knitted loop 121 on a needle 122 (Figs. 8 and 10) which is the last needle to be raised to latch clearing level at this station, the trailing end 125 of the yarn 120 lying behind loops 126, 127, 128 and 129 of yarn knitted on the needles associated with the terminal group of jacks 80 at the next active knitting station then passing through a following sinker loop 130 to the interior of the fabric whereby the trailing end is caught into the fabric. It is immaterial whether one or more than one knitting station is taken out of operation as long as one station remains in operation. In the particular setup shown in Fig. 3 the mechanism is controlled so that the group of terminal needles at three of the stations will be removed from operation, the knitting of such groups of needles all taking place at the remaining stations.

As will be apparent the mechanism of the invention operates on the same principle when an inoperative station is placed in operation. In this case the movement of the nose portion 86 to active position and then back to inactive position is timed so that the first two to four of the forward terminal group of needles indicated diagrammatically at 131 (Fig. 11) are raised only to yarn taking height.

It will be understood that the improvements specifically shown and described by which the above results are obtained can be changed and modified in various ways without departing from the invention disclosed and hereinafter claimed.

I claim:

1. In a multi-feed circular knitting machine comprising a needle cylinder and independent needles carried thereby, butted rocking jacks associated with said needles, a plurality of knitting stations including yarn feeding means, a jack raising cam at each of said knitting stations having an inclined cam face for operation on butts at the lower ends of the jacks when the jacks are rocked outwardly, means at each of said knitting stations for selecting jacks including means for engaging the upper ends of said jacks for outwardly rocking the butts at the lower end of said selected jacks, means at each of said knitting stations forinwardly rocking the butts at the lower ends of a terminal group of the jacks selected at said station to disengage said jacks from said raising cam ata point intermediate the ends of said inclined cam face, said last named means including a lever for engaging the lower ends of said terminal group of jacks, means for mount-i ing said lever for movement along a path parallel to the inclined cam face of said raising cam, and means for moving said lever along said path from an inactive posi= tion to an active position in which said lever moves said terminal jacks from said inclined cam face at said inter. mediate point.

2. In a multivfeed circular knitting machine compris: ing a needle cylinder and independent needles carried thereby, rocking jacks associated with said needles, a plurality of knitting stations, a jack raising cam at each of said knitting stations having an inclined cam face for engagement with the lower ends of said jacks when the jacks are rocked outwardly, means at each of said knit-. ting stations for selecting jacks to be raised by said raising cam, said selecting means including means for engaging the upper ends of said jacks foroutwardly rocking the lower ends thereof for engagement with said in: clined cam face, and means at each of said knitting stations for inwardly rocking the lower ends of a terminal group of jacks selected at said stations to disengage said jacks from said raising cam at a point intermediate the ends of said inclined cam face, said last named means including a lever for engaging the lower ends of said ter minal group of jacks, means for mounting said lever for movement along a path parallel to the inclined cam face of said raising cam, means for moving said lever along said path from an inactive position to an active position in which said lever moves the lower ends of said terminal jacks from said inclined cam face at said intermediate point, and means for controlling the operation of said moving means.

3. In a multi-feed circular knitting machine comprising a needle cylinder and independent needles carried thereby, rocking jacks associated with said needles, a plurality of knitting stations, a jack raising cam at each of said knitting stations having an inclined cam face for engagement with the lower ends of said jacks when the jacks are rocked outwardly, means at each of said knitting stations for selecting jacks to be raised by said raising cam, said selecting means including means for engaging the upper ends of said jacks for outwardly rocking the lower ends thereof for engagement; with said inclined cam face, and means at each of said knitting stations for inwardly rocking the lower ends of a terminal group of jacks at the trailing end of the jacks selected to disengage said terminal group of jacks from said raising cam at a point intermediate the ends of said inclined cam face, said last named means including a lever adapted to engage the lower ends of said terminal group of jacks, means for mounting said lever for movement along a path parallel to the inclined cam face of said raising cam, means for moving said lever along said path from an inactive position to an active position in which said lever moves the lower ends of said terminal jacks from said inclined cam face at said intermediate point, and means for controlling the operation of said moving means.

4. In a multi-feed circular knitting machine comprising a needle cylinder and independent needles carried thereby, rocking jacks associated with said needles, a plurality of knitting stations, a jack raising cam at each of said knitting stations having an inclined cam face for engagement with the lower ends of said jacks when the jacks are rocked outwardly, means at each of said knitting stations for selecting jacks to be raised by said raising cam, said selecting means including means for engagingthe upper ends of said jacks for outwardly rocking the lower ends thereoffor engagement with said inclined cam face, and means at each of said knitting stations for inwardly rocking the lower ends of a terminal group of jacks atthe leading end of the jacks selected to disengage said terminal group of jacks from said raising cam at a point intermedi-atethe ends of said inclined cam face, said last named means including a lever adapted to engage the, lower ends of said terminal group of jacks, means for mounting said lever for movement along a path parallel to the inclined cam face of said raising cam, means for moving said lever along said path between an inactive position and active position in which said lever moves the lower ends of said terminal jacks from said inclined cam face at said intermediate point, and pattern means forcontrolling the operation of said moving means.

5. In a multi-feed circular knitting machine comprising a needle cylinder and independent needles carried thereby, rocking jacks associated with said needles, a plurality of knitting stations, a jack raising cam at each of said knitting stations having an inclined cam face for engagement with the lower ends of said jacks when the jacks are rocked outwardly, means at each of said knitting stations for selecting jacks to be raised by said raising cam, said selecting means including means for engaging the upper ends of said jacks for outwardly rocking the lower ends for engagement with said inclined cam face, and means at each of said knitting stations for inwardly rocking the lower ends of a terminal group of jacks selected to disengage said terminal group of jacks from said raising cam at a point intermediate the ends of said inclined cam face, saidlast named means including a lever adapted to engage the lower ends of said terminal group of jacks, means for mounting said lever for movement along a path parallelto the inclined cam face of said raising cam, means for moving said lever along said path between an inactive position and an active position in which said; lever moves the lower ends of said terminal group ofjacks from said inclined cam face at said intermediate point, cam means for operating said moving means to move said lever to inactive position, and means for operating said moving means to move said lever to active position.

6, In a multi-feed circular knitting machine comprising a needle cylinder andindependent needles carried thereby, roeking jacks associated with said needles, a plurality of knitting stations, a jack raising cam at each of said knitting stations having an inclined cam face for engagement with the lower ends of said jacks when the jacks are rocked outwardly, means at each of said knitting stations for selecting jacks to be raised by said raising cam, said selecting means including means for engaging the upper ends of; said jacks for outwardly rocking the lower ends thereof for engagement with said inclined cam face, and-means at each of said knitting stations for inwardly rocking the lower ends of a terminal group of jacks selected to disengage them from said raising cam at a point intermediate the ends of said inclined cam face, said last named means including a lever adapted to engage the lower ends of said terminal group of jacks, means fQl" mounting said lever on said raising cam for movement along a path parallel to the inclined cam face of said raising cam, means for moving said lever along said path between an inactive position and an active position in which said lever moves the lower ends of said terminal group of jacks from said inclined carn face at said intermediate point, cam means for operating said moving means to move said lever to inactive position, resilient means, for operating said moving means to move said lever to active, position, and stop means for determining the active position of said lever.

References Cited in the file of this patent FOREIGN PATENTS 308,421 Great Britain Mar. 28, 1929

Images