US1127769A - Circular-knitting machine. - Google Patents

Description

H. A. & H. VB. HOUSEMAN. CIRCULAR KNITTINC MACHINE.

APIPLIOATION FILED JUNE 16,1913. 1,127,769.

4 SHEETS-SHEET 1.

Patented Feb-9, 1915.

E. A. & H. E. HOUSEMAN.

CIRCULAR KNITTING MACHINE. e

APPLICATION FILED JUNB16,1913.

, Patented Feb.9,1915.

4 SHEETS-SHEET 2.

ANTR/veg f A. se H. E. H'OUSBMAN. CIRCULAR KNITTlNG MACHINE.

Y l APPLICATION FILED JUNE 16, 1913. 1, l 27,769. Patented. Feb. 9; 1915.

4 SHEETS-SHEET 4.

' IIIIIIIIIIII lllllilllllllllilllH-j n we UNITED s'rA'TEsM rarENT oEEloE.

HARRY A. HOUSEMAN AND HAROLD E. HOUSEMAN, OF PHILADELPHIA, PENNSYL` VAN'IA,` ASSIGNORS TO STANDARD MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA. I

CIRCULAR-KNITTING MACHINE.

Specification of Letters Patent.

Patented Feb. i), 1915.

Application led `Tune 16, 1913. Serial No. 773,829.

T0 all luwm 'it may concern.'

Be it known that we, HARRY A. HOUSE- MAN and l-Iauono E. HoUsEMAN, citizens of the United States, residing at Philadelphia, county of Philadelphia, and State of Penn- Sylvania, have invented anew .and useful Improvement in Gir'cular-Knittlng Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

Our invention relates to circular knitting machinesadapted to the manufacture of hosiery in which yarns of different colors or weights are employed in different parts of the stocking.

The object of the invention is to provide means for moving the different yarns into and out of operative relation with the needles and to cordinate said means with the mechanism for effecting the shift of the machine from oscillation to rotation and vice versa. i

The invention comprises a number of novel features which are shown as applied to, and which are particularly adapted for application to, a machine in which the needle cylinder is the rotatable element and the needle actuating cams are stationary, although such novel features are not necessarily -confined to a machine of this type.

The invention also comprises the combination and coordination of these novel features with certainmechanism, including the means for controlling the shift from rotation to oscillation, and vice versa, forming the subject matter of a patent issued to Harry A. Houseman November 18, 1913, No. 1,078,677, in which the needle cylinder is the stationary element and the cam cylinder the rotary element; which'mechanism is also set forth-in a joint application filed by us April 15, 1913, Serial No. 761,199, and is therein shown and described as adapted to a machine in which the needle cylinder rotates and the cam cylinder is stationary.

The invention willbe understood by reference to the accompanying drawings, in which there is shown the independently novel features of the present application as well as certain of the mechanism, adapted from the applications above mentioned, that is coordinated and combined with said independently novel features.

In the drawings: Figure 1 is a side elevation of the machine partly. broken away; Fig. 2 is a partial front view of the mach'lne; Fig. 3 is a section on the line 3 3 of Flg. 2; Fig. 4 is an enlarged plan View of a portion of the machine; Fig. 5 is a rear View of the yarn carrier actuating mechanism; Fig. 6 1s a sectional elevation through the knitting head and yarn carrier mechanism; Fig. 7 is a section on the line 7-7 of Fig. 4 looking in the direction of the arrows; Fig. 8 is a detail perspective view of the clamp and cutter and means for directly actuating them; Fig. 9 is a diagram illustrating a typical stocking which maybe knit on the machine; Flg. 10 is a detail view showing the operating leverk for actuating one of thread carriers and the yarn deiectors operating in connection therewith.

Referring first to Figs. l, 2, 3 and- 6: a .i

is the frame of machine and b the bed plate for the rotatable needle cylinder e, the stationary cam ring t and appurtenant mechamsm. The needle cylinder has secured to its' lower end a driven gear 11, which is driven-from a gear 12 on the clutch shaft 20, on which are slidably mounted the two pinions 21 vand 22, which have sleeves to which are yoked the vertically movable arms 24, 2-1, which are moved up or down in unison as hereinafter described. The clutch 23 is fixed on the shaft 20, between pinions 21 and 22. The upper pinion 2l is constantly rotated and the lower pinion 22 constantly oscillated. When the arms 21 are moved down, thus engaging the'rotary pinion with the clutch 23 and disengaging the oscillatory pinion 22 therefrom, the gear 12 is continuously rotated, thus vrotating the needle cylinder. When the arms '24 are elevated, thus disengaging the rotary pinion 21 from the clutch 23 and engaging the oscillatory pinion therewith, the gear 12 ,is constantly oscillated, thus oscillating the knitting cylinder. The pinion 21 is constantly rotated by means of a spur gear 25 meshing with the pinion 21. The shaft 26 of the spur gear 25 also carries a bevel gear' 27 driven from a bevel pinion 28 on the driving shaft t. The pinion 22 is constantly oscillated by thevfollovving means: On the shaft 26 is a crank 29 connected by a link 30 with an arm 31 turning on a post 32. Extending from the hub of the arm 31 is a quadrant 33 engaging the pinion 22. The arms 24 are secured to a post 60, which has a pair of collars between which extend the forked yends of a lever 62 pivoted between its ends on the frame of thelmachine. The lever is actuated by means of a double cam 63, 64, secured to a sleeve 67 on the shaft 69.

v These cams rotate together and may be integral with one another and are adapted in their rotation to actuate the lever 62,as more fully described in the above mentioned applications, so as to move and hold the post 60 either up or down. When the post 60 is moved down, the rotary pinion 21 is clutched with the clutch 23, thus dictating the rotation of the needle cylinder. When the post 60 is moved up, the oscillatory pinion 22 is clutched with the clutch 23, thus dictating the oscillation of the needle cylinder. The double cam 63, 64:, is caused to turn by means of a pattern ratchet Wheel 68, also secured to the sleevev 67 which ratchet wheel is turned initially by first turning the sleeve 67 and then by means of a pawl 70. Just before it is desired to change from rotation to oscillation, the cam shaft 77, which is geared to the sleeve 67 by means of the intermeshing pinions 78 and 79, is given a partial turn, thereby turning the sleeve 67 together with the dou.- ble cam 63, 64 and the ratchet Wheel 68. The cam shaft 77 is so turned by leverand pawl and ratchet mechanism, set forth in the last mentioned application, but not herein shown, actuated from the pattern chain u. The paWl is constantly reciprocated by being carried on a holder 83 secured to the shaft 69, on which is a bevel pinion 82 driven by a bevel pinion 81 secured to the hub of the oscillatory arm 31. The ratchet Wheel 68' has a number of teeth, all of uniform length except one, which is substantially'longer than the others. During oscillation of the cam cylinder, the pavvl 70 plays upon the long tooth, its extent of movement being insuflicient to cause it to drop backof the same. Consequently, it is inoperative to turn the ratchet wheel 68. But after the ratchet Wheel has been given the initial turn just described, the long tooth is advanced to such position that on the next freciprocation of the pawl 70 it drops back of the long tooth and proceeds toturn the ratchet-wheel, together with the double cam 63, 64. As the pawl 70 engages and pushes the next tooth of the ratchet 63, the double cam 63, 64 lifts the post-engaging end of lever 62, clutching the lower or oscillatory pinion 22 to the clutch shaft 20, and unclutching the rotary pinion 21, and causing the needle cylinder to oscillate. This operation occurs at the beginning of the knitting of the heel and at the beginning of the knitting of the toe. So long as the pawl 70 is in operative relation with the ratchet wheel 68, the latter will turn a distance of one tooth, at each four rotations of the driving shaft. As continued rotation of the ratchet wheel 68 would dictate the premature shifting from oscillation to rotation,

means are provided, not herein shown but set forth fully in said application Serial No. 697,861, to Withdraw the pawl 70 from action after it has turned the ratchet wheel two more teeth. The pawl 70 remains in its inoperative position throughout the knitting of the heel or toe. After the knitting of the heel or toe is completed, the pawl 70 is restored to operative position and immediately turns the ratchet Wheel another tooth, causing the double cam 63, 64 to actuate lever 62 to move down the post 60, arms 24 and pinions 21 and 22, and clutching the rotary pinion 21 with the clutch 20, thereby causing the needle cylinder to rotate. The

4into position to allowl the pawl 70 to drop back of the long tooth and, after actuating it and the next tooth of normal length, again effects the shift from rotation to oscillation as hereinbefore described.

Having now described the mechanism set forth more fully in the applications hereinbefore mentioned, we shall proceed to describe the independently novel features characterizing the present invention.-

.Mounted on the bed plate b of the machine is a frame o carrying a stud on which is fulcrumed a frame 100. The frame carries studs on which are pivoted a plurality of yarn carriers. Any desired num= ber may be provided, but for the purpose of illustrating my invention, we have shown four yarn carriers, 101, 102, 103 and 10i, th'.` first being pivoted on one stud and the other threeon another stud. These carriers arr` provided with end oriiices through which the threads l, 2, 3 and 1 form the cops 1.05, 106, 107 and 108 pass to the needles, as is well understood in the art. l-Vithiu the needle cylinder is a yarn guiding plate 109` which-v` although of peculiar shape, performs in general the Well known-function of guiding any thread (except thread 1 as will be, hereinafter described) that has been moved by its carrier out of operative relation to the needles, from the thread engaging ends of the yarn carriers into operative relation with a cutter 110 and clamp 111 (see particlll.

yarn and clamp' it, as will be hereinafter de` scribed. The thread of anyv given yarn carrier is thus so held that when the yarn carrier is again moved down, it will bring the thread into operativet relation with the needles and cause it to again knit into the. fabric, the clamp being released at `the proper time. -The objectof the mechanism hereinafter described yis to actuateY these yarn carriers and the clamp and cutter at the proper times, and more specifically to actuate them at certain stages in the knitting of the stocking and to that end to control their movements from the pattern chain and the clutclrshiftng mechanism. It will of coarse be understood that the number of thread carriers that will be employed, and the precise points in the knitting of the stocking at which given threadcarriers and the clamp andfcutter will be actuated, are` variable factors, and that our invention is not limited to the provisionof any articular number of yarn carriers or to t eir actuation at any specific stages in the knitting of the stocking. The specific arrangement ofmechanism hereinset forth must therefore be understood to be illustrative merely, being provided to knit a typical stocking, although other stockings with'a greater or a less number of threads and differently posi? tioned in the stocking are equally adapted to be made on lthe machine by rearranging the mechanism in a manner which will be obvious to the skilled mechanic. lVe have deemed it advisable, however, in order to clarify the invention, to assume that it is desired to make one' specific style of stocking, which we shall now proceed to briefly describe. In Fig. 9v is Shown diagrammatically such a typical stocking. In lmitting the stocking, starting say, at the top of the leg, a garter top is first knitted from one thread, say thread 4. To knit this part of the stocking the yarn carrier 104 1s held down in action while the remainder of the yarn carriers are heid up out of action. Next the remainder of the leg down to the ankle part thereof is knit from thread 2. To e'llect this the carrier 102 is moveddown into action and the carrier 104 is moved up out of action. Next the ankle portion of the stocking is knit. In knitting this portion'YY of the stocking the thread-2 is retained and? a reinforcing thread 1 is knit, into the rear half of the ankle. To effect this the carrier 102 remains down in operative position and the carrier 101 is also moved downinto operative position, the thread, however, being caused to knit only'on the rear half of the needles by means to be hereinafter described. Next the heel of the stocking is knit from the thread 3. This portion of the stocking is knit by oscillating the needle cylinder, as before described, and on the shift from rotationto oscillation, the carrier 103 vee 8.

,is moved down into action and the carriers Ythe foot proceeds; the foot being formed,

like the ankle, from thread 2 and reinforcf ing thread 1, thelatter being knitted onlv in the sole, or lower half, 'of the foot.v When the foot' is completed, the machine again shifts from rotation to oscillation, the carrier 103 is'moveddown into action and the carriers 101 and 102 moved up out of action, thus forming thetoe, like` the heel, from thread 3. At the conclusion of the toe, the machine again shifts from oscillation to rotation, the carrier 101 is moved down into action and the carrier 103 moved up out of action, and the knitting of the garter top from thread 4 again proceeds. We shall now describe the means wherebythese operations are automatically effected.

Each carrier 102, 103, 104 is of bell crank shjape, while the carrier lOlis of T shape.;- all, however, being moved down into opera#YY tive position-by means -of springs 11.2', each fastened at one end to one'. arm of the carrier and at the other end to the frame 100. v The carriers are moved up into inoperative position by means of levers 121,122, 123, .124, pivoted at their lower ends on a comlmon stud. Each lever 122, 123 and 124 se actuates its corresponding yarn carrier by directly engaging the depending arm Aof the carrier. The llever 121,'however, Iactuates the yarn carrier 101somew'hat indirectly, by means of the following mechanism: On the same stud on Awhich the carriers 102, 105 103 and 104 are pivoted is pivoted a lever 114, which is normally held back .by a spring 113. This lever is connected, by a bridge rod 115, with a yarn-deflectin lever 110 (the kfunction of which will be erfein-v 11a after described) pivoted on a bracket 117 secured to the ring 99, which constitutes the front parti of the frame 100. The vbracket 117 also carries the clamp 111 and cuttery liereinbefore mentioned. The .bridge 111sv rod has a projection 118 which extends back of a lever 119 pivoted between its ends. One arm of the lever 11,9 extends acrossiunf der the overhangingfront arms ofthe earriers 102, 103 and 104 back of the depending 12o arm of the carrier 101. When the lever 121 is swung forward, rit actuates the lever 114i,l which moves the bridge rod 115k forward in the direction of` its length, causing the prov jeetiony 118 to engage and swing the cross- 125 lever 119, which in turn engages. the carv rier 101 and swings it np into inoperative position.` I y y To actuate the carrier-actuating levers 121, 122, 123, 124 there are provided four 130 i cam disks 131, 132, 133, 134 fixed on a'shaft 135 revoluble in bearings on the frame `c.

Each cam disk is provided with one or two cut away or depressed portions in its periphery. The cams are turned in unison and may be integral with each other. The cams work against projections on the several levers 121, 122, 123, 124. When the high face of a'given cam engages its correspondin lever, the latter is held forward, thus ho ding the corresponding arn carrier up out of operative position. en the cam is turned so as to bring the low or depressed part of its periphery opposite its corresponding lever, the corresponding yarn carrier springs down into operativev position, moving the projection of the corresponding actuating lever into said depressed section of the cam. Adjustable stops are provided for levers 121, 122,', 123 and 124, in their rearward movements, so that the thread carrier 101, 102, 103, and 104 maybe gaged to bring threads 1, 2, 3 and 4 into nice relation with the needles. The se stops are in the form of screws 97, one for each of the thread carrier operating levers. -These screws are held in the clamping device 96, on the frame 100. By tightening bolts 95 this clamping device holds screws 97 securely from turning. It will thus be understood that by giving the shaft 135 a step-by-step motion and by providing appropriately located depressions in the periphery of the cam disks, any given yarn carriers, at any step in the rotation of the shaft 135, may be movedr into or out of operative position. are provided for imparting such a step-bystep motion to the shaft Secured to the shaft is a ratchet wheel 136, which is provided with a number of teeth corresponding to the number of desired ste sin a complete rotation of the shaft 135. n the drawings a six-tooth ratchet is shown. The ratchet is actuated by a pawl 137 depending from one arm of a bell crank lever 138 pivoted on the shaft 135. The other arm of the bell-crank is attached to the upper end of a rod 139 the lower end of which extends through an orifice in the end of a lever 140 pivoted on the main bed plate. A nut 141 is threaded on the rod 139 above the lever 140 and another` nut 142 is threaded on the lower eX- tremity of the rod. A spring 143 is confined between the nut 142 and the lever 140. The

lever 140 is moved up on its pivot once at each turn of the gear wheel 25, the latter carrying a cam 144 having a long gradually sloping face which engages the lever 140 between its ends. As before described, the gear 25 is part of the chain of mechanism which actuates the needle cylinder Vand rotates once at'each .four revolutions of the needle cylinder When'the latter is rotating or once at each complete oscillation back and forth of the needle cylinder when the latter inoperativeby the The following means is oscillating. Thus the pawl 137 has the capacity to actuate the ratchet,` wheel 136 once at each turn of the gear wheel 25, but pattern-controlled mechanism is provided to normally hold up the rod 139 and the arm of the lever 138 connected thereto, so that the paw] will be ineffective to actuate the ratchet 136, this mechanism being rendered attern chain or by the clutch shifting mec anism at such times as it is desired to allowv the pawl 137 to actuate the ratchet wheel 136, and thereby, through the cam-disks and leversactuated thereby, effect a shift of yarn-carriers. The pattern-controlled mechanism Iwill now be described.

A stop lever 145, pivotally supported at its lower end is held, by a spring 146, in such position that its free end rests under and back of a pin 147 projecting laterally from one arm of the pawl-carrying lever 138. Thus the rod 139 is held up so that the lever 140 will not drop when the cam 144 passes beyond it in the rotation Qf the gear 25. `When, however, the stop or lever 145 is moved from under the pin 147, the lever 140 and rod 139 will be free to drop when the cam 144 recedes from the lever 140, thus carrying the pawl 137 back into engagement with the next tooth of the ratchet 136, so that, on the next rotation of the gear 25, the cam 144 will lift the lever 140 and rod 139, thereby turning the lever 138 so as to cause the pawl 137 to actuate the ratchet 136 onesixth of a complete turn. The lever 145 is retracted from engagement with the pin 147 I by means of a lever 150, which has a hooked end engaging a pini148 on the lever 145. The lever 150 is pivoted between its ends ou an arm 151 secured to a shaft 152. The lever 150 is counterweighted so as to hold'its hooked end in engagement with the pin 148. On the shaft 152 is secured an arm 153 which is moved by a spring 154 into posit-ion to turn the shaft 152 so as to move the lever 150 to allow its hooked end to engage the pin 148. The movement of the lever 150 in this direction is limited by a stop 156 against which an army on the lever 150 abuts, which swings 'up the hooked end of the lever 150 and causes it to hook the pin 148. When it is desired to release the mechanism for reciprocating the pawl 137, the arm 153 is moved against the action of its spring 154 so as to turn the shaft 152 and move back'the arm 150, thereby withdrawing the lever 145 from the pin 147. As will be hereinafter described this movement is underrides the lever 140, it and the rod 139 are moved up, thereby turning the lever 138 to cause the pawl to engage said tooth and turn the ratchet 136 one-sixth of a complete turn. It is necessary that at this time the lever 145 should immediately spring into locking engagement with the pin 117, even though at this time the device for actuating the arm 153 has not receded. This is brought about by releasing the hooked end ot the. lever 150 from the pin 148. This release is effected by means of av lever 157 pivoted between its ends, one end being actuated by a stepped cam 158on theshat't 135i to cause its other end to engage a pin 150 on the lever 150 and move the hooked end of the .lever 150 down out of engagement with the pin 148. Thus the lever 1:45 is released and is snapped into locking position as soon as the pawl 137 has completed its forward ratcheting imovement, `and the ratchet 136 and the cam disks on the shaft 135 aro again held stationary until after the device actuating arm 153 recedes from its4 actuating position and is again operated by the pattern mechanism.

The device -for immediately operating the arm 153 is a projection 161 on a link 160. The link 160 is attached at one end to a pivoted lever 1.6'2 and at the other end to a pivoted lever 165. The lever 162 carries a roller 163 which is actuated by a cam 161` on the cam-shaft 77. As before described the cam-shaft 77 is given one complete turn during each completev cycle of rotation and oscillation of the machine. The Atwo `high parts ot' the cam 161 are sopositioned that they engage the cam roller 163 at each shift 'from rotation to oscillation and vice versa. At each engagement of a high part of cam 161 with roller 163 the. lever 162 and link 161 are movedito cause the projection 160 to aetuate the arm 153, thereby, through the mechanism hereinbefore described, releasing the mechanism for locking the pawlcarrying lever 138. Thus, at each shift from rotation.tofyoscillation or vice versa, one or more of the yarn vcarriers may be moved into operation and one or more of the varn carriers may be moved ont of operation, as will hereinafter be more particula rly described with reference to the particular stocking (shown in Fig. 9 and hereinbe- `tore described) which the machine is adjusted to knit.

The lever 165 is pivoted between its ends and carries at its lower end a projection in liuc of travel ofthe lugs 166 and 167 on the pattern chain. which may be actuated by any convenient means. such. for example. as the means set forth in the said application FlerialNo. 697.861. As a pattern lug passes under the projection on level' 165. the latter is swung to impart to link 161 a movement similar to that imparted to it by the lever 162, thereby, through the mechanism hereinbefore described, releasing the mechanism for locking the pawl-carrying lever 138.

.lt has been hereinbctore stated that When any giveuyarn carrier 102, 103 or 104: is moved up Aout of operative position. the thread extending from the last needle which has caught the thread tothe thread-eye of the carrier will be drawn over the upper tace' of the guide-plate 109 and between the lnembers of the clamp 111 and cutter 110. 11s soon as the thread is drawn into this position it becomes necessary to clam small ratchet wheel 173, thereby `turning t-he latter a distance of one tooth. The

teeth of the ratchet 173 also act as cams' to operate one arm 174 of a lever pivoted between its ends, the other arm' 175 ofthe leverextendinff over thc knitting head and connected to tie movable members of the clamp 111 and cutter 110. Then the lever 170, link 171, pawl lever 172, ratchet 173 and arm 171 are so operated, the effect is to lit't the'arm 17a and retract thenpper members of the clamp 111. and cutterllO, thereby releasing any threads that may be4 clamped and permitting any new thread that is moved, by its carrier, out of operative relation with the needles to be drawn between the jaws of the clamp and the knives of the cutter. As soon as the tooth of the ratchet 173 that has so actuated arm 174 rides from under the arm 174, a spring 176 immediately snaps back the arm 17-1 into its original position thereby causing the arm 175 to descend and effect the clamping `and cutting of the newly introduced thread. The pawl-lever 172 remains in its forward posltion so long as the pawl lever 138 remains in its forward position, which it does, as before described, by reason of the action of the locking lever 145, until just before the yarn carriers are again shifted. As soon as the pawl-lever 138 is unlocked, thereby allowing the rod 139 to drop and the pawl-lever to be retracted as before described, the lever 170 is released from engagement with the. pawl-lever 138, allowing aspring 177 to ret-urn the pawllevel' 172 into position to engage the next v tooth ofthe ratchet 173 and into position to again actuate the ratchet when it is again operated by the pawl-lever-lBS.

The peculiar manner ot' actuating ythe yarn carrier 101 has been licreinbefore described. It has also been stated that this l" carrier controls the feed to the needles of yarn l and that this yarn is knitted into only the rear of the fabric or in that partv out of operative position during the next half rotation and must then again be moved into operative position during the next half rotation, and so on. This is accomplished by the following means: When the cam disk 131 is moved to allow the lever 121 to swing back, thereby permitting the carrier 101 to swing into operative position, the lever 119 is swung into such position that a roller 181 on the end thereof is brought into operative relation with a cam '180 extending entirely around the needle cylinder. While the roller 181 rides on the low partof the cam, which it does during one half a revolution of the needle cylinder, the carrier 101 remains in operative position; but when the roller 181 rides on the high face of the cam, which it does during the other halfv of the needle cylinders rotation, the lever 119 is swung to lift the carrier 101 out of operative position. 'Ihus the yarn 1.is in operative relation with only those of the needles that knit the rear half of the stocking. It vwill be understood that when the lever 121 is swung forward by the cam disk 131 so as to actuate the lever 11-'1 to push forward the rod 115, the lever 119 is moved out of operative relation with the cam 180 as well as into position to withdraw thecarricr 101 from operative position.

We have hereinbefore described how the movement of one of the carriers 102, 103 or 101 out of operative position causes the corresponding thread to be drawn over the guide plate 109 intooperative relation with the clamp 111 and cutter 110; but it is obvious that this must be avoided when the carrier 1 01 is moved into operative position` as it would be impracticable to clamp and cut the thread 1 at each rotation of the needle cylinder; and further, a greater waste of yarnwould be caused by so drawing it around the clamp and cutter. 'The most convenient expedient is to allow the thread 1, during the half rotation of the needle c vlindcr that it is out of operative position, to be carried across the stocking from the last needle that it engages on one course to the first needle that it engages on the next course. To accomplish this it is necessary to carry the thread from said last needle under the guide plate 109 just as if the thread carrier were in active relation with the needles during the complete rotation of the needle cylinder. This is accomplished by the deilecting lever 116 hereinbefore described. During the time that the high part of the cam disk 131 rides upon the lever 121 and the latter holds the lever 114 and the rod 115 forward and the carrier 101 out of action, the lever 116 is held in such position that its free extremity entirely overlies the guide plate 109 and it is therefore functionless; but when the low part of the cam disk 101 allows the said parts to move back, thus allowing the carrier 101 to move the lever 119 into operative relation with the cam 180 to cause the carrier 101 to be moved alternately into and out of active position as above described` the free extremity of the deflecting lever 116 extends over the edge of the guide plate 109 into such position that, as soon as the carrier 101 is moved up the thread extending from the same engages the deflecting lever 116 and is thereby carried under the guide plate 109. Of course when the cam disk is again turned to cause its high part to engage the lever 121, the deflecting lever 116 again moves forward and allows the thread 1 to be carried over the guide plate 109 into operative relation with the clamp andcutter.

It has been hereinbefore ystated that the frame'100 is pivoted on the frame c, thus enabling the frame, with all its attached parts, to be swung up so as to permit ready access to the needle cylinder for the transfer-ring operation or for any other purpose. When the' frame 100 is swung down, the nose 98 in front of the ring 99 rests upon a screw 185 threaded in a bracket 186 secured to the bed plate b. By means of this screw, vthe level of the ring 99 and its attached parts may be nicely regulated. When the frame 100 is swung up on the frame c, lthe levers 121, 122, 123, 124. are moved out of operative relation with their respective cam disks 131- 132, 133 and 131, and therefore, withoutmeans to prevent it, the needle engaging ends of all the yarn carriers would move down. It is desirable to avoid this and to retain all the yarn carriers in the relative positions which thev had before the frame 100 is swung up.

This is accomplished by the followiugmeans: A bracket is secured to and extends above the frame c. This bracket at its upper end carries an adjustable stop 191. On the frame 100 is pivoted a hooked lever 192. Each of the carrier levers 102, 103 and 10i and the lever 11-1 has a projection near its pivot. A spring 193 tends to draw the hooked lever down, but this is nor- 194 connected to the hooked lever with the 'stop 191. When, however, the frame 100 is swung back on its pivot, the lug 194 recedes from the stop 1917and the spring 193 draws the hooked lever 192 into engagement with the projections 195 on any of the levers 102, 103, 104l or 114 that have been moved into position to hold the respective threads 2, 3, 4 and 1 controlled thereby out 'of engagement withv the needles. Thus the carriers all'V remain in the same relative positions until the frame 100 is again swung down into its normal position. In order to retain frame 100 in its upper position when raised as just described. there is an arm 94 connected with the frame at its pivot, and a spring 93 connects the end of the armwith the. bed plate b. The arm 94 is so posltioned that in the raising of the frame 100, the arm is swung past its dead center with respect to spring 93. In this manner. the spring holds frame 100 down when 1t 1s 1n operative position and holds it elevated when raised.

Having thus described the construction and operation of our invention, it maybe well to give a brief rsum of the operation of the several thread carriers and their actuating mechanism as arranged to pro-` duce the stocking of Fig. 9. Ey reference to the last named figure,'it will be observed that in the complete cycle of operations necessary to knit a complete stocking each of the threads 1, 2 and 3 is moved into and out of operation twice, while thread 4 is moved into and out of operation once. It will also'rbe observed that six rearrangements ofthe thread carriers are required. Hence the mechanism for operatingthe shaft 135 carrying the cam disks is arranged to'give the shaft six turns in each complete rotation of the shaft. The cam disks 131,

132 and 133 controlling the respective levers 121, 122 and 123, which in turn control `the respective carriers 101, 102 and 103 feeding the respective threads 1, 2 and 3, are cach provided with twoV depressions which dictate the movement into active position of its corresponding carrier twice in a complete cycle of operations; while the cam disk 134 controlling theI lever governing the carrier 104 feeding thread 4, is provided with a single depression which dictates the movement into active position of carrier 104 once in a complete cycle of operations.' YAssuming that the needle cylinder is rotating and that the garter top is being knit. At this stage. lever 134 rests in the single 'depression in cam disk 124 and carrier 104 is in active position. This eontines until the lug 160 on the pattern .chain 'il strikes the lever 165, thereby, through link 160 and projection 101, actuating arm 153 to turn the shaft 152, thus causing arm 151 and lever 150 to withdraw lever 145 from the ygear wheel 25, to actuate the rod 139 and pawl lever 138 to'turn the ratchet wheel 136, thus turning all the cam disks one-sixth of aY complete rotation. to ride out of the single depression in cani disk 134 and lever 122 to move into one of the two depressions in cam disk 132, thus withdrawing carrier 104 fromf'ractive position and permitting carrier 102 to move into activ-e position. This actuation of the pawl lever 138 operates the chain of mechanism (lever 170, linkf171. pawl lever 172, 'ratchet 173, lever 174-7175) controlling the cutter 110 andrclamp '111. It may be here mentioned that the adjustment of the mechanism isfsuch that during the time that the lever 140 is riding upon the cam 144, the

This causes lever 124 i cessive. That is, first, the carrier 102 moves into operativel position, then the carrier 104 moves out of operative position, and then the cutter and clamp are actuated to cut and clamp the thread 4. Thus at all times at least one thread is being knit into the needles, and the clamp and cutter are of course not actuated until after the carrier 104 moves into Yoperative position and the thread is drawninto position to be cut and clamped. In the continued rotation of the needle cylinder the cam disks 131, 132, 133 and 134 remain stationary until the completion of that part of the leg of the stocking above the reinforced rear of the ankle.

At thistime the lug 167 actuates the lever' given another turn, causing lever121` to move into one of the depressions in cam disk 131, thereby permitting carrier 101 to move into operative position. Thereafter both carriers 101 and 102 are in operative position' and the reinforcing thread .2 is caused to knit into the rear of the ankle portion as hereinbefore described. When the end of the Vleg portion is reached, the machineshifts from rotation to oscillation, inwhich movement the shaft 77 is turned to Cause one of the cams 164 to` actuate the lever 162 and link 160, thereby allowing the cam disks to be given another turn,.causing lever 123 to move into one ofY the two depressions in cam disk 133 and levers 121 and 122 to ride onto the high faces of their' respective cam disks 131 and 132; whereby the carrier 103 is moved into operative position A 1 its cam disk, whereby the carriers 101 and yactuate the lever 162 and link 160, and

102 are moved into operative position and the carrier 103 is moved out ofoperative position, the cutter and c'lamp being subsequently operated to cut and clamp thread 3. n

After the circular foot portion of the stocking is completed, the machine shiftsv from rotation to oscillation, in which movement the shaft 77 is turned to again cause the first of the two cams 164 to actuate the lever 162 and link 160, thereby allowing thecam disks to be given another turn, causing lever 123 to move into the second depression in cam disk 133 and levers 121 and 122 to ride onto the high faces of their respective disks 131 and 132, whereby the carrier 103 is moved into operative position and the carriers 101 and 102 are moved out of operative position, the cutter and clamp being subsequently actuated to cut and clamp threads 1 and 2. After the toe is completed, the machine shifts from oscillation to rotation, in which movement the shaft 77 is turned to again cause the second of the cams 164 to thereby allowing the cam disks to be given another` turn, `which restores them to the position at the beginning of the cycle of operations. Lever 124 is thereby allowed to move into the single depression in cam disk 134,' and lever 123 rides onto the high face of the cam disk 133; whereby the carrier 104 is moved into active position and the carrier 103 out of operative position; the clamp and cutter being subsequently operated to cut and clamp thread 3. The machine then again proceeds to knit the garter top, after which the cycle of operations is repeated. While we have disclosed a machine in which the needle cylinder is rotatable and the cam cylinder and yarn carriers are nonrotatable, we do not mean to exclude the application of our invention tothe well known equivalent machine in which the needle cylinder ,is stationary and the needleactuating cams and yarn carriers rotate.

'hile we have herein shown certain features set forth in the prior patent and application hereinbefore mentioned and in other applications heretofore filed by one or both of us, we do not claim herein any such features except so far as they may be claimed in combination with the independently novel features set. forth for the first time in this application. Nor do we claim the subject matter claimed in the application filed by Harry A. Houseman, of even date herewith, Serial No. 773,900, which, although set forth in this application, and

claimed in combination with other elements, is, separately considered, the sole invention of thesaid Harry A Houseman.

Having now fully described our invention,

what we cla-im and desire to protect by Letm ters Patent is: 1. In a circular knitting machine, in combination, a rotary needle cylinder, rotary driving means, oscillatory driving means, shifting mechanism for alternately connecting the two driving means with the needle cylinder, a pattern chain, yarn carriers, means dictating the movementy of certain yarn carriers into operative position in apredetermined order at different stages of the knitting operation and simultaneously with each of said movements the movement of' a yarn carrier out of operative position, means arranged to be operated by the shifting mechanism preparatory tothe shift from rotation to oscillation and vice versa, means arranged to be operated by the pattern chain independently of the shifting mechanism at another predetermined stage in the knitting operation, and common mechanism, operable by either of the two last named means independently of the other, adapted to control the operation of said yarn carrier operating means.

2. In a circular knitting machine, in com- .95 bination, a rotatable needle cylinder, rotary driving means, loscillatory driving means, shifting mechanism for alternately connecting the two driving means with the needle cylinder, a pattern chain, a plurality of yarn carriers, means operable from the driving means controlling the movement of the yarn carriers into and out of operative relation with the needle cylinder, and means arranged to be operated -independently either by the shifting mechanism or by the pattern chain to place the yarn carriers in operative relation with the driving means.

3. In a circular knitting machine, in combination, a rotatable needle cylinder, rotary driving means, oscillatory driving means, shifting mechanism for alternately connecting the two driving means With the needle cylinder, a pattern chain, a plurality of yarn carriers, means adapted to move the yarn 1] carriers into and out of operativef relation with the needle cylinder, mechanism actuated from the driving means adapted to dictate the operation of the yarn carrier actuating means, devices normally rendering the 12 last named mechanism inoperative but adapted to be actuated to render it operative', and two mechanisms for so actuating said devices connected respectively with the shifting mechanism and with the pattern chain and adapted to be independently operated thereby at different stages of the knitting operation.

4. In a circular knitting machine, in combination, a rotatable needle cylinder, rotary 1gdriving means, oscillatory driving means,

shifting mechanism for alternately connecting the vtwo driving means with the needle cylinder, a pattern chain, a plurality of yarn carriers, a clamp and cutter adapted to cooperate to cause the thread of a carrier moving out of 'operative position to* be cut and clamped, mechanism actuated fromthe driving means adapted to dictate the operation of the yarn carrier and clamp andy cutter actuating means, devices normally rendering the last named mechanism inoperative but arranged to be actuatedto render it operative, and two mechanisms so actuating said devices and connected respectively with the shifting mechanism and with the pattern chain and adapted to beindependently operable thereby. y In a circular knitting machine, in combination, a rotatable needle cylinder, 'rotary `driving means, oscillatory drivingy means,

shifting mechanism foralternately connecting the two driving meansV with the needle cylinder, a plurality of yarn carriers adapted to be moved intoand out of operative relation with the needle cylinder, means con trolling the` movementof the yarn carriers into and out of operative relation with the needle cylinder, mechanism actuated from a cutter adapted to coperate to cause the thread of a carrier moving out of operative position to be cut and clamped, means -coni' trolling the movement of the yarn carriers and the operation of the clamp and cutter, connecting mechanism actuated from `the driving means adapted to operate the last named means, a. pattern chain and twolevers one ,connected with the shifting means and adapted to be actuated thereby preparatory to the shift from rotation to reciprocation and vice versa, and the other connected with the pattern-chain and adapted to be actuated independently of said shift at a different stage -in the knitting operation, said levers adapted, when either is actuated by its respective actuating means, to render said connecting mechanism operative.

7. In a circular knitting machine, in combination, a rotatable needle cylinder, rotary driving means, oscillatoryr driving means, shifting mechanism for alternately connectJ ing the two driving means with the needle cylinder, spring actuated yarn carriers normally tending to move into operative relation with the needle cylinder, means adapted to move intoand out of operation to hold 'the yarn carriers out of operative relation with the needleycylinder, connecting mechanism actuated from the driving means to opcrate'. the last named means, a pattern chain, and means arranged to be operable independently either by the shifting mechanism or by the pattern chain to place the connecting mechanism in operative relation with the driving means.

8. i In a circular knitting machine, in combination, a rotatable needle cylinder, rotary driving means, oscillatory ydriving means, shifting mechanism for alternately connecting the two driving means with the needle cylinder, a pattern chain, a plurality of yarn carriers, a'plurality ofvrotatable cams, means actuated by the respective cams controlling the movements of the respective yarn carriers into and out of operative position,

. mechanism actuated from the driving means to turn the cams step by step, devices normally rendering the last named mechanism inoperative but adaptedv to be actuated to render it operative, and two mechanisms for so actuating said devicesconnected respectively with the shifting mechanism and with the pattern chain and adapted. to be independently operated thereby at different stages in the knitting operation. Y

9. In a circular knitting machine, in combination, a. rotary needle cylinder, rotary driving means, oscillatory drivingf means,

shifting mechanism-for alternately connecting the two driving means with the needle cylinder, a shaft turning with the shifting mechanism, a cam on said shaft, a pattern chain, yarn carriers, means dictating the movement of certain yarn carriers into operative position in a predetermined order at kkdifferent stages of the yknitting operation and simultaneously with each of said movements the movement of a yarn carrier out of operative position, a lever, arranged to be operated by said cam preparatory to the shift-from rotation to oscillation and vice versa, a lever arranged to be operated by the pattern chain at another4 predetermined stage in the knitting operation, and common mechanism, operable independently by either lever, adapted to control the operation of said yarn carrier operating means.

10. In a circular knitting machine, in

combination, a rotatable needle cylinder and drivingmeans therefor, yarn carriers, means dictating' the movement of the yarn carriers into and out of operative position, a pivoted stop lever normally engaging said means and -holding itfrom operation,l a second lever pivoted on an axis different from that of the first lever and adapted to withdraw the first lever out of operative position, a pattern chain, a lug thereon, and devices actuated by said lug and connected with the second lever and adapted, in such actuation, to operate the second lever to Withdraw the first lever from its holding position, and means operating independently of the'second lever to return the first lever to its holding position whereby the first lever may be so returned the second lever, permanently in the path of the cam and adapted to be actuated thereby, in the shift from rotation to oscillation and Vice versa, to operate the ysecond lever to withdraw the first lever from its holding position, a pattern chain, and means arranged to' be operated by the pattern chain, independently ofthe shifting mechanism, to actuate the second lever.

V12. In a circular knitting machine, in combination, a rotatable needle cylinder and driving means therefor, yarn carriers, mechanism dictating the movementof the yarn carriers into and out of operative position, means normally holding said mechanism from operation, means adapted to Withdraw said holding .means from operation, pattern controlled mechanism adapted to so operate said withdrawing means, and means, actuated bysaid yarn carrier controlling mechanism when released, adapted to release said withdrawing means from said holding means to permit the latter to move into operative position.

13. In a circular knitting machine, in combination, a rotatable needle'cylinder and driving means therefor, yarn carriers, means dictating the movement of the yarn carriers into and out of operative position, a stop lever normally engaging said means and holding it from operation, a second lever adapted to withdraw the first lever out of operative position, pattern-controlled means adapted to so operate the second lever, and a third lever, actuated by said yarn carrier controlling means when released, adapted to release the second lever from the first lever to permit the first lever to return to operativeposition.

14. In a circular knitting machine. in combination, a rotatable needle cylinder and driving means therefor, yarn carriers, means dictating the movement of the bination, a rotatable needle .cylinder and driving means therefor, yarn carriers, means dictating the movement of the yarn carriers into and out of operative position, a stop lever normally engaging said means and holding it from operation, a pin on the stop lever, a pivoted hooked lever engaging said pin, pattern controlled mechanism adapted to move the hooked lever'and thereby withdraw the stop lever from operative position,

a pin on the hooked lever, a third lever, actuated by said means When released, adapted to engage the last namedv pin and move the hooked lever out of engagement with the stop lever, and a spring adapted to return the stop lever, when released, into operative position.

16. In a circular knitting machine, in combination, a rotatable needle cylinder and driving means therefor, yarn carriers, rotatable cams, means controlled thereby to c0ntrol the movement of the yarn carriers into and out of operative position, means adapted to turn the cams step by step, a stop lever normally engaging said means and holding it from operation, a second lever adapted to Withdraw the rst lever out or holding position, pattern controlled means adapted to so operate the second lever. and means turning with said cams adapted to disengage the second lever from the first lever and permit the latter to return to holding position.

17. In a circular knitting machine, in com`- bination, a rotatable needle cylinder and driving means therefor, yarn carriers, rotatable cams, means controlled thereby to control the movement of the yarn carriers into and out of operative position, means adapted to turn the cams step by step, a stop lever normally engaging said means and holding it from operation, a second lever engaging the stop lever, pattern controlled means adapted to actuate the second lever and thereby Withdraw the stop lever from operative position and thus permit the yarn carrier controlling-cams to turn. a cam turning with the yarn carrier controlling cams, and a lever operated by the last named cam to disengage the said levers and permit the stop lever to return to holding position.

18. In a circular knitting machine. in combination, a rotatable needle cylinder and driving means therefor, yarn carriers, means i lever normally engaging "said vmeans and holding `it.from operation, a weighted hooked' lever normally engaging the stop lever, a shaft, an arm thereon on which the weighted lever is pivoted, pattern controlled mechanism adaptedto turn the shaft and thereby cause the weighted leverto withdraw the stop lever from holding position, and` a. third lever actuated by the carrier controllingwmeansto move the Weighted hooked lever out'of engagement with the stop lever. Y v

y `19.` `In a'circular knitting machine, in combination, a rotatable needle cylinder, rotary driving means, oscillatory driving means, shifting mechanism for alternately connecting the ytwodriving meansy with the needle cylinder, la shaft turning with the shifting mechanism, a. pattern chain, a cam on said shaft, a lever operated by said cam, ,a lever operated by the pattern chain, a link con:-

ynecting said levers, a shaft, an arm on the shaft adapted ,tov be actuated vby said. link, yarn carriers, mechanism operated by the driving means dictating the yshift of the yarn carriers into vand out of operative position, devices normally holding said mechanism inoperative, and means operated from the last named shaft controlling the operation of said devices. n y v Q0. In a ,circular knitting machine, in combination, a rotatable needle cylinder and driving means therefor, yarn carriers, means dictating. the movement of the yarn carriers into and out of operative position, a clamp and a cutter, a lever controlling the operation of the clamp and cutter, a lever actuatable in the movement of the yarn carrier controlling means, alink actuatable by said lever, a pawl actuatable by said link, a Wheel operating asta ratchet actuatable by said pawl and operating as a cam to actuate lthe first lever, a spring adapted to return the second lever, linkfand pawl to their normal position, .and a spring to return the rst lever to its normal position.

21.v In a lcircular knitting machine, in combination, a rotatable needle cylinder and drivingvmeansv therefor, a yarnrcarrier, a

lever adapted to` move :the yarn carrier out rofY operative position, means to retract the lever to so move the yarn carrier, mechanism actuated by the driving `means to actuate the lever-,retracting means, patternl controlled means normallyrendering the last named mechanism inoperative but adapted at intervals to render said mechanism operative, a spring tending to hold the yarn carrier in operative position and advance the lever` ,while said mechanism is inoperative. and a cam turning with the needle cylinder adapted to engage the lever while said mechanism is inoperative and move the yarn carrier alternately into and out of operative position in each rotation of the needle cylinder. i

22. In a vcircular knitting machinefin combination, a rotatable needle cylinder and driving means therefor, a yarncarrier, a spring tending to hold the yarn carrier in operative position, a lever engaging the yarn carrier, a cam turning with the needle cyl inder and adapted duringa part of each rotation thereof to engage the lever and Withdraw the yarn carrier out of operative position, a rody engaging said lever and movable to withdraw the same out of operative relation with the -cam and thereby. move the yarn carrier out of operative position, a second lever adapted to operate the rod, a third lever adapted to operate the second lever, a shaft, means to turn the same` step by step, a cam disk on the shaft adapted in the turning of the shaft to operate the third lever and thereby, through the second lever and rod, operate the first lever and yarn carrier as specified, andaspring adapted, in the further turning of the shaft, to retract the second and third levers and the rod, and

-allow the yarn carrier and the first lever to riers land mechanism coperating therewith carried by the swinging frame, the yarn carriers being pivotally mounted thereon to roo swing into and out ofi'operative position,

means adapted to withdraw and hold the respective yarn Ycarriers out of active position While the swinging frame is in operative relation with the needle cylinder, and independent means adapted, when the swinging; frame is moved out of operative relation with the needle cylinder, to engage theyyar'n carrier or carriers that have been moved into their inactive positions and prevent them from swinging to the level of the. other yarn carrier or carriers.

Q4. In a circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon. a swinging frame pivotally connected with the machine vframe .so as to swing into and out of operative reinto operative relation with the needle cyl? inder when the same are not withdrawn by said withholding means, and independent means adapted,^when the swinging frame is moved out ofy operative relation with the needle cylinder, to engage the yarn carrier or carriers that have-been withdrawn from active position and hold them from being operated by their respective springs.'

25. In a circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon, a swinging frame pivotally connected with the machine frame so as to swing into and out of operative relation with the needle cylinder, yarn carriers and mechanism coperating therewith carried by the swinging frame, the yarn `carriers being pivotally mounted thereon to swing into and out of operative position,` means mounted on th'e main frame and connected with the respective yarn carriers and adapted to beoperated to withdraw and hold the yarn carriers out of operative posi-4 tion while the swinging frame is in operative relation with the needle cylinder and adapted to be rendered inoperative when the swinging frame is moved out of operativeireflationwith the needle cylinder, and independent means adapted, when the swinging frame is moved out of operative relation with the needle cylinder, to engage and retain the yarn carrier or carriers that have been withdrawn from active position.

26. In a circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon, a swinging frame pivotally connected with the machine frame so as to swing into and out of operative relation with the needle cylinder, yarn carriers and mechanism coperating therewith carried by the swinging frame, the yarn carriers being pivotally mounted thereon to swing into vand out of operative position, means adapted to withdraw and hold the respective yarn carriers out of active position while the swinging frame is in operative relation withthe needle cylinder but to be rendered inoperative when the swinging frame is moved outof operativerelation' with the needle cylinder, and a lever pivotally connected with the main frame and adapted, when the swinging frame is moved out of operative relation with the needle cylinder, to engage and retain the yarn carriei or carriers that have been moved into their inactive positions.

'27. In a circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon, a swinging frame pivotally connected with'the machine frame so as to swing into and out of operative relation with the needle cylinder, yarn car riers and mechanism coperating therewith carried by the swinging frame,`the yarn car riers being pivotally mounted thereon to swing into and out of operativeposition, means adapted to withdraw and hold the respective yarn carriers out of active position while the swinging frame is in operative relation with the needle cylinder but to be rendered inoperative when the swinging frame is moved out of operative relation with the needle cylinder, a lever pivotally connected with the main frame and adapted, when the swinging frame is moved out of operative relation with the needle cylinder, to engage and retain the yarn carrier or carriers that have been moved into their inactive positions, a spring so actuating the lever, and a stop on the swinging frame adapted, when `the latter is in operative en gagement with the needle cylinder, to move into position to hold the lever from being actuated by the spring.

28. In a circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon, cams mounted on the machine frame, means to turn the cams step by step, a swinging frame pivotally mounted on the machine frame so as to swing down into operative relation with the needle cylinder and up out of operative relation therewith, yarn carriers pivotally mounted on the swinging frame, springs tending to move the yarn carriers into operative position, means operatively engaging the respective cams and adapted to be controlled thereby to move the respective yarn carriers out of operative position when the frame is swung down but adapted to be disengaged from the cams when the frame is swung up, and independent means adapted,I

when the frame is swung up, to engage the yarn carrier or carriers that have been moved into their inactive positions and prevent them from swinging into their active positions relatively to the frame.

29. In a 'circular knitting machine, in combination, the machine frame, a needle cylinder mounted thereon, cams mounted on the machine frame, means to turn the cams' step by step, a swinging frame pivotally mounted on the axis of the cams so as to swing downv into operative relation with the needle cylinder and up out of operative relation therewith, yarn carriers pivotally mounted on the swinging frame, springs tending to move'the yarn carriers into operative position, means operatively engaging the respective cams and adapted to be controlled thereby to move the respective yarn carriers out of operative position when the frame is swung down but adapted to he disengaged from the cams when the frame is swung up,a lever pivotally connected with the main frame and'adapted when the frame is swung up, to engage the yarn carrier or carriers that have been moved into their inactive positions and prevent them from 'In testimony of which invention, we have lo swinging into their active positions relahereunto set our hands, at Philadelphia, on

' tively to the frame, a spring so actuating this 12th day ofJune,1913.

the lever and a stop on the franie adapted when the, frame is swung down, to hold the l lever from being actuated by the spring but adapted, When the frame is swung up, to vWitnesses: recede from the lever and allow it to be op- WM. P. BROCKERMANN, erated by its spring. RAYMOND FAHRE.

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