US1877086A - Stop mechanism for bobbin strippers - Google Patents

Description

Sept. 13, 1932. w. H..TROGDON STOP MECHANISM FOR BOBBIN STRIPPERS Filed March 24. 195 1 2 Sheets-Sheet 1 Sept, 13, 1932. w H. mosoon STOP MECHANISM FOR BOBBIN STRIPPERS Filed March 24, 1951 2 Sheets-Sheet 2 Patented Sept. 13, 1932 HTE YATES WILLIAM' H, TROGDON, F WORTHVILLE, NORTH CAROLINA, ASSIGNOR TO THE TER- PwELL MACHINE COMPANY, OF CHARLOTTE, NORTH CAROLINA, A CORPORATION OF NORTH CAROLINA STOP MECHANISM FOR BOBBIN STRIPPERS Application filed March 24, 1931. Serial No. 524,914.

The invention relates to bobbin stripping machines, and more particularly to improyed means for automatically stopping the machine by action of a misplaced bobbin.

The invention is especially adapted for application to or incorporation in machines of the character disclosed in United States patem to E. A. Terrell, No. 1,740,128, Dec. 17 1929, or other bobbin strippers in which the structure or mode of operation are analogous.

In stripping machines of the character contemplated, the waste-carrying bobbins are directed by a chute or guideway, having a curved or arcuate portion, and delivered one by one to devices which include means for supporting a bobbin in stripping position, stripping blades which close about the bobbin, and means which push the bobbin-head foremost from between the stripping blades substantially in the direction of its axis, the waste being removed from it during such movement. These machines also have an arcuate guard, parallel to the arcuate chute rails or guides, movably mounted on the chute structure and overlying the heads of thebobbins therein, to prevent or limit outward displacement and overlapping of the heads, so that they will descend accurately into stripping position with the proper zone of their length between the stripping blades so as to insure such blades engaging between the bobbin-head and the residual mass of waste on the barrel and insure clean stripping. A clutch controls the driving of the bobbin-advancing means.

The present inventionprovides means intermediate the movable guard and the clutch, which acts to release the clutch and stop the machine, and especially to stop the bobbinadvancing means, which at the time is acting on the bobbin, when the guard is displaced to a predetermined or abnormal extent, by a bobbin misplaced in its approach to the stripping position. Thus, the mach ne is pre-. vented from continuing to operate after the guard has been displaced to a predetermined extent in excess of the movement imparted to it by any bobbin suitably positioned to be properly and completely stripped.

The characteristics and advantages of the invention are further sufficiently explained in connection with the following detail description of the accompanying drawings, which show preferred embodiments.

In the drawings, r

Fig. 1 is a side elevation of a bobbin stripper of the character above refered to, with mechanism embodying the invention in one preferred form, incorporated therein or applied thereto, parts of the machine which are not essential to an understanding of the invention being omitted.

Fig. 2 is a section at 2-2, Fig. 1. Fig. 3 is a detail view of a lever-and-link connection. 1

Fig. 4 is a plan detail of the front end of the machine, withsome parts in section.

Fig. 5 is a diagrammatic detail of supporting means for the bobbin head in an initial stripping position.

Fig. 6 is a side elevation of a modified feed-chute, including an auxiliary guide, or

bobbin-positioning member.

The invention is adapted or adaptable to stripping machine of the general character disclosed in the above-mentioned patent, which includes, as shown therein, a base, or longitudinal main frame-piece 1, supported on legs 2. Bobbin-supporting and guiding. means are located on the frame-piece, includ ing spaced side-plates or castings 3 having horizontal portions or extensions 4 supporting fiaringly-arranged plates or boards 5, constituting a bobbin-receiving hopper 6. The sideplates 3 provide a generally downcurved or arcuate bobbin-chute or guideway 7, including rails 8 extending from the front ends of the hopper-walls 4 arcuately downward along the upper edges of the chute-walls 3, to support slidingly the bobbin-heads and guide the bobbins to initial stripping positi on. In this movement the bobbin barrels or shanks pass between arcuate barrel-guidestrips 80, supported on the hopper and chute side-plates by rods 9 passing through bosses 10 and secured by set-screws 11, whereby the guide-strips are positioned in accordance with the barrel-diameter. In this movement,

tor or segmental rack 12, terminating in a smooth Vertical guide-face 13 leading to a tip-support 1% consisting of spring-actuated fingers, to support a tip just above initial stripping position.

An arcuate guard-strip 15 is positioned parallel and in spaced relation to the guiderails 8, and is coextensive therewith, outwardly-overlying the bobbins-heads as they move in contact, in an arcuate row, downward in the chute, and acting to prevent outward displacement, overlapping, etc., of the heads. The guard is movably mounted, as by a pivotal or hinge-connection at 16 to a bracket 17 on a side-plate 3, and is urged inwardly, or toward the chute-rails, as by a spring 18 tensioned between it and a bracket 19 on the side-plate.

To limit adj ustably such inward movement, a bracket arm 20 is secured to the guard and lies alongside one of the chute sideplates 3. This bracket arm has a lug 21, and a set-screw 22 passes through a threaded hole in this lug and its end engages a stop-lug on another bracket 23 secured to the side-plate. The screw is held in adjusted position by a locknut 24.

At its lower end the guard is arranged to cooperate with an upper segment of the endface of the bobbin-head in initial stripping position, to position the bobbin in relation to stripping blades 90 and 91, with its head on head-supporting members 32 associated with the blades, and a bobbin tip-receiving socket in a pusher, later referred to. This locating action of the guard-end as here shown is provided for by an end-piece 25 secured to the guard-end, and having an inb ent end or finger 26 constituting a stop, or head-positioning member of the guard, which with the guard is displaced outwardly a moderately normal distance (toward the right, Fig. 1) as the bobbin is advanced in the early part of the stripping action, and then, when freed from contact with the cylindrical portion of the head, returns to normal. position, as shown.

A plunger 27 has a beveled inward face to engage the barrel of a bobbin supported by its head resting on the supporting memhere 32 and its tip restin in the tip-support 14; above mentioned. This plunger is operated by means fully described in the abovement-ioned patent, to force the bobbin-tip downward (with accompanying separating movement of the fingers constituting the tipsupport) to and into a socket 28 on a pusnhead or slide 29, which is mounted in guides on the frame and is reciprocated longitudinally of the machine by means also shown in detail in said patent. The tip is thus placed in front of a pushing face 30 on the slide, and the bobbin-barrel is also properly located in relation to the stripping blades 90, 91. The blades are now advanced to engage the barrel of the bobbin in close proximity to the head thereof, and the push-head is advanced (toward the right in Fig. 1) to move the bobbin in the direction of its axis, and strip the waste therefrom, or move the wast-e relatively toward the tip, by the action of the stripping blades, during which movement the head is grasped by jaws on a pull-head, and the stated bobbin movement, and stripping of waste therefrom, are completed. 7

The machine is driven by an initial driving member such as a pulley 33 revoluble on a shaft 34, under control of a clutch 35. The movable clutch element, or cone, 36 is shifted by a fork 3'? carried by a rockshaft 38 supported by frame-brackets 39, and having a hand-lever 4:0 for normal clutch operation.

For various reasons, including improper location or movement of the bobbins in the guide chute, faulty action of the plunger 27 or guard-finger 26, or especially owing to accumulation of particles of waste, or lint, in the chute, the head of abobbin approaching the lower end of the chute may be retarded and held in an upward position, confronting a lower portion of the guard 15 or its end piece 25, while the tip is placed by the action of plunger 27, in the socket 28 of push-head 29. The next forward movement of the push-head will advance this misplaced bobbin in its axial direction, but at an upwardly inclined angle, and against the guard strip; and since the guard is movably and yieldably mounted to prevent breakage of the guard or of the bobbin, the movement of the bobbin a distance corresponding to the full advancing movement of the push-head will displace the guard to an abnormal degree, and cause displacement of bobbins lying in the chute above the misplaced one referred to, with possible injury or breakage of the bobbin which is ammed between the pushhead and the guard, and usually resulting in tipping up the remaining bobbins in the chute in similar relation.

Tn combination with the known structure described hereinbefore, the invention provides means intermediate the guard and clutch, acting upon advance of such a misplaced bobbin, and movement of the guard to a predetermined extent, or beyond a normal range of movement to disconnect the clutch and stop the machine, and discontinue the advancing movement of the bobbin so as to permit restoration of the disarranged bobbins including the wrongly-delivered one be fore damage shall be done either to the bobbins or to the machine, and also to discontinue the advancing movement of the bobbin.

Such operative connection of the guard to the clutch may vary greatly. As shown, in the structure chosen as one preferred embodiment, a lever i5 is mounted for oscillation at a convenient point on one of the chute-castings or side-plates 3. Desirably, for this lever-mounting, T utilize a suitable one of the rods 9 above referred to, which support the bobbin barrel guide-strips 80. This rod is made of such length that it extends outward considerably beyond the boss 10 in which it is mounted; and on this projecting rod-portion a bushing 46 having an end flange 4.7 is placed and secured as by a screw 48. The lever has a hub formation oscillatably mounted on the bushing, and held against outward displacement by the flange a7.

Lever arm 50 is connected to the guard 15 by suitable means, such as a spring-link 51, or by other means such as a link with a lost-motion device, so as to permit slight or normal movement of the guard without effect on the lever or clutch 35. The efiective length or tension of the spring 51 may be adjustable, as by connecting one of its ends to a screw 52 which passes through the lever-end 50 and is secured in adjusted position by nuts 53, engaging opposite faces of the lever. The other end of the spring may conveniently be connected to the guard, by placing and securing an angle bracket 54 under lock-nut 24: of set-screw 22 above referred to, and securing the spring end to' this bracket. -The upper arm 55 of the lever is connected by a link 56 to an arm 57 secured on the clutch-operating rockshaft 38 above mentioned. Lost-motion means is provided in this linkage, consisting as shown of a slot 58, in which engages the angularly bent end-portion 59 of the link-rod. A cotterpin 60 or the like inserted through the rodend and a washer 61 thereunder, prevent dis-v placement from the slot. By this means the clutch may be released or engaged by'manipulation of its hand-lever 4:0 in the ordinary way, to start and stop the machine, without effect upon the link system operatively con necting the clutch to the guard; The connection of the link 56 to arm 57 may be adjustable, as by providing a screw-thread 63, Fig. 3, on the link-rod, engaged in a block 64-, which has a swivel mounting in the end of the arm.

In operation, whenever a bobbin is misplaced in themanner above referred to, that is, with its end located in front of the pushface 30 and its head in engagement with the member 25 above its stop-finger 26, or in engagement with the guard proper, when the push-head is advanced, the bobbin is moved in the direction of its own .axis and the head engaging with the guard moves the guard outward beyond its range of movement in normal stripping operations, and as'soon as the guard is so moved to an abnormal degree. spring 51 is tensioned sufficiently to oscillate lever 4:5; link 56 having its offset end portion located at the right-hand end of lever-slot 58 (as viewed in Fig. 1) is thus moved rearward, acting on arm 5'? to oscillate the clutch rockshaft 38 and move the avoiding injury to the guard or derangement of other parts of the machine and injury to the bobbin.

After the misplaced and disarranged bobbins have been-put in order, the machine ,is

restarted by reengagement of the clutch and 6 then functions normally without action of the stop mechanism until another bobbin is improperly located adjacentthe stripping position.

Spring 51 may be so adjusted by means of screw 52 and nuts 53 that with the guard in normal position as shown, the spring is practically slack or under only slight tension.

When the guard is moved a slight. distance outward as in normal operation, the spring is then only moderately additionally tensed and its pull is insufiicient to cause clutch release; 3

but when the guard is moved farther, or to an abnormal extent as above referred to by action of a misplaced bobbin, the spring is additionally tensioned sufficiently to release the clutch and this releasing action occurs before the bobbin or the guard is moved far enough to cause damage or derangement.

The spring 51 broadly represents any suitable means or. element in the stop action linkage, or intermediate lever 4:5 and the guard, for permitting a normal guard movement and for effecting the stop action upon occurrence of abnormal guard movement. As briefly referred to above, instead of such a spring or spring-link, I may employ a linkrod with a stop or shoulder arranged to engage the lever-arm 50 with slight lost motion, sufficient to permit normal guard movement, and in case of abnormal movement acting to move the guard lever positively for a releasing action.

Fig. 6 shows a modification in which the main guard 15 is constructed and arranged as'in the previous example, except that its lower end 100 is located substantially horizontally opposite the lower end of the head guide-rails 8, and in such position that bobbin-heads advanced in a normal stripping action will not engage the end of the guard. The clutch-releasing mechanism is connected to this main guard 15 in the manner previously described.

An additional or auxiliary guard or bobbin-head guiding and positioning member 102 in the form of an arcuate strip, is pivotally mounted at 103 on an upwardly-extended portion of bracket 17 which also pivotally sup ports the main guard. The auxiliary guard normally rests against the lower end of the main guard, and is held in this position by a spring 10%, tensioned between it and springbracket 19 to which spring 18 of the main guard is also connected.

The lower end 106 of the auxiliary guard projects below the end of the main guard, serves properly to guide bobbin-heads therefrom to stripping position, and is arranged or adjusted to slightly overlap and engage or confront an upper segment of the outer face of a bobbin-head when in normal stripping position between the blades. The end of the auxiliary guard-strip thus acts as a stop, or positioning member, to locate properly the head and barrel of the bobbin in relation to the stripping blades; and when the bobbin is advanced by the push-head in a stripping action, the bobbin-head passes below the end 100 of the main guard 15, which is not displaced; the head in this movement engages and displaces the auxiliary guard outwardly until its end is freed from engagement with the head, whereupon the guard is brought back to normal position by its spring 10 i, ready to position the next bobbin for stripping.

When a bobbin is misplaced in the manner previously described, that is, located in an outwardly-upwardly inclined position, with its tip in the push-head socket and its head confronting a portion of the main guard 15, themain guard is displaced outwardly, when the bobbin is advanced by the push-head, as in the previous example, and the stop-mechanism acts to throw out the clutch and stop the machine, just as before described.

Since in this embodiment the auxiliary guard serves to position the bobbin which is being stripped, and the main guard is out of range of such bobbin and not moved in any way by the bobbins except when the lowermost one gets out of proper relation, a much closer setting of the spring 51 is possible, serving to bring the machine to rest even more promptly to prevent damage upon a relatively slight movement of the main guard.

The guards of Figs. 1 and 6 are not of my invention, and are claimed only in connection with the features of the present stopmechanism, being dealt with per sein another application.

it will be evident to skilled persons that the present stop mechanism is adapted or adaptable to other stripping machines having asimilar or equivalent organization or mode of operation, and also that in the light of the illustrative embodiment herein shown and described many variations may be made with out departing from the principles disclosed; and l contemplate employment of any structures that are properly within the scope of the appended claims.

ment of the bobbin and stripping means, and

stop mechanism intermediate said guiding member and the driving means and acting to discontinue driving when said member is moved by a misplaced bobbin in a stripping action, the stop mechanism including means permitting normal connection and disconnection of the driving means. 7

A. bobbin stripping machine having in combination driving means, stripping means,

a guide directing bobbins toward stripping position and movable by a misplaced bobbin in a stripping action, an independently-movable positioning member cooperating with the bobbin in stripping position, and stop mechanism intermediate the guide and the driving means and acting to discontinue driving when the guide is moved by a misplaced bobbin.

4. A bobbin stripping machine having in combination driving means, stripping means,

a guide directing bobbins toward stripping I position and movable by a misplaced bobbin in a stripping action, a positioning member extending beyond the guide and cooperating with the bobbin in stripping position, and

stop mechanism intermediate the guide and the driving means and acting to discontinue driving when the guide is moved by amisplaced bobbin.

5. A. bobbin stripping machine having in combination driving means, stripping means,

a movable guide directing bobbins toward stripping position, means yieldably retaining the guide in normal position, a positioning member movable in relation to the guide and adapted to direct bobbins therefrom to stripping position, and a connection from the guide to the driving means acting to interrupt driving when said guide is moved by a misplaced bobbin in a stripping action.

6. A bobbin stripping machine having in combination driving means, stripping means, feeding means, a head-positioning member adapted to be moved during each stripping action by a bobbin properly positioned for stripping, and a second member adapted to receive movement from an improperly positioned bobbin to unship the driving means.

7. A bobbin stripping machine having in combination driving means, stripping devices,

feeding means including a head-guard guiding the bobbins in the feeding, means combi'ning the head-guard and the driving means to unship the latter when a bobbin is pressed against the guard in a stripping action, and means independent of the head-guard to continue the guiding action while the bobbin moves into proper stripping position after leaving the head-guard.

8. In a bobbin stripping machine having in combination, feeding means including a bobbinguiding member, and a stop-motion operably connected to such member to stop the machine when the member is actuated by a misplaced bobbin, such member terminating its guiding function short of strip ping position, and a second bobbin-guiding member continuing the guiding action beyond the range of the first and controlling the bobbin in a stripping position.

9. A bobbin stripping machine having in combination stripping means, a chute adapted to turn bobbins from vertical to horizontal osition therein and to resent them succes-' sively in stripping position, means for causing relative movement between the bobbin and stripping means longitudinally of the bobbin, power driving means, an arcuate guard overlying the bobbin heads in the chute to cooperate in thus turning the bobbins anterior to stripping position, andmeans actuated by a movement of said guard for unshipping the driving means.

10. A bobbin stripper having in combination driving means, stripping means, a movably mounted guide directing bobbins toward stripping position and adapted to be moved by a misplaced bobbin in a stripping action, and a linkage connecting the guide to the driving means to interrupt driving when the guide is so moved and including means permitting interruption and resumption of driving independent of movement of said guide.

11. A bobbin stripper having in combination driving means, stripping means, a movably mounted guide directing bobbins toward stripping position and adapted to be moved by a misplaced bobbin in a'stripping action, and a linkage connecting the guide to. the driving means to interrupt driving ,when the guide is so moved and including means permitting movement of the parts in excess of that necessary to interrupt the driving.

12. A bobbin stripper having in combination stripping means, means for presenting bobbins successively in stripping position, means for moving a bobbin relatively to the stripping means in a stripping'action, driving means, a movable guard overlying the bobbin heads anterior to stripping position, and means including a resilient connection actuated by movement of the guard for effecting unshipping of the driving means to stop the machine.

' 13. A bobbin stripper comprising in combination stripping means, means for present-. ing bobbins successively in stripping position, means for moving a bobbin substantially longitudinally in a stripping action, driving means, amovable guard overlying the bobbin-heads anterior to stripping position, means urging the guard to normal position, and a linkage from the guard to the driving-means acting to disconnect the latter upon movement of the guard due to a misplaced bobbin, said linkage including a spring which accommodates normal guard movements without clutch-release.

' 14. A bobbin stripper having in combination stripping means, means for presenting bobbins successively in stripping position, means for moving a bobbin substantially longitudinally in a stripping action, a driving clutch, a guard movably mounted overlying the bobbin-heads anterior to stripping position, meansurging the guard to normal position, and a linkage connecting the guard to the clutch, said linkage including a spring which accommodates normal guard movements without clutch-release and is tensioned by abnormal movements sufliciently to effect clutch engagement.

15.:In a bobbin stripping machine of the general character described, in combination, a bobbin guide-chute, a movable guard, means for advancing a bobbin in the general direction of its axis from an initial stripping position, and a driver for said advancing means, theguard being normally actuated by properly placed bobbins in the bobbin-advancing action and, abnormally actuated by a misplaced bobbin, and means intermediate the guard, and clutch and acting upon such abnormal movement of the guard to disconnect the driver.

16. A bobbin stripping machine having in combination, a feed-chute, a movable headguard, a head-positioning member movable in relationto the chute and guard and actuated by normally-advanced bobbin-heads, stripping means, bobbin-advancing means, a, driver, and .means intermediate the guard and driver and acting when a misplaced bobbin is advanced against the guard to disconnect the driver.

17. A bobbin stripping machine having in combination, a feed-chute, a main headguard movably mounted on the chute, an auxiliary guard movably mounted on the chute and having a head-positioning member projecting below the main guard, stripping means, bobbin-advancing means, a driver, and means intermediate the main head-guard and driver and acting when a misplaced bobbin is advanced against the'latter guard to disconnect the driver.

18. In a bobbin stripping machine, in combination, stripping means, means for moving a bobbin in relation to the stripping means in a stripping action, driving means, an arcan arcuate feed-chute, a movable guard over i bobbin in a stripping action.

19. In a bobbin stripping machine, in comblnation, stripping means, means for movmg a bobbin in relation to the stripping means 1n a stripping action, driving means,

lying heads of bobbins located along the chute, and a linkage connecting the guard to the drlvlng means to disconnect the latter When the guard is moved by a misplaced bobbin in the stripping action.

20. lln a bobbin stripping machine, in cornbination, stripping means, means for moving a bobbin in relation to the stripping means in a stripping action, driving means, an arcuate feed-chute, a movable guard overlying heads of bobbins located along the chute, and a linkage connecting the guard to the driving means to disconnect the latter when the guard is moved by a misplaced bobbin in the stripping action, the linkage including a spring tensioned by the guard movement, and permitting movement of the guard by a bobbin in a normal stripping action Without disconnection of the driving means.

21. A bobbin stripping machine having in combination driving means, stripping means, a movable guide directing bobbins toward stripping position, means yieldably retaining the guide in normal position, a positioning member movable in relation to the guide and adapted to direct bobbins therefrom to stripping position, and a connection from the guide to the driving means acting to interrupt driving When said guide is moved by a misplaced bobbin in a stripping action, the guide being arranged to permit movement of a bobbin in a normal stripping movement Without contact With the guide, and the positioning member being arranged for engagement and displacement by a bobbin in each normal stripping action.

22. A bobbin stripping machine having in combination stripping means, means for feeding bobbins successively into stripping position, means for moving a bobbin in relation to the stripping means in a stripping action, driving means, a guard overlying and positioning the bobbin heads in advance of stripping position, the guard being movably mounted. and having a moderate movement in cooperation with the bobbin in each nor mal stripping action and also having a greater movement upon engagement by an angularly misplaced bobbin as urged by said bobbin-moving means, and means actuated by such greater movement of the guard for effecting release of the driving means and stoppage of the machine.

28. A bobbin-stripper having in combination stripping means, means for presenting bobbins successively in stripping position, driving means, a movable guard overlying the bobbin-heads anterior to strippingposition, and means including a resilient connection actuated by movement of the guard for effecting unshipping of the driving means to stop the machine, said resilient connection providing for a moderate movement of the guard Without a stopping action and for effecting a stopping action upon a greater movement of the guard.

24. A bobbin-stripper tion stripping means, means for guiding and presenting bobbins successively in stripping position, means for causing relative movement between the bobbin and stripping means longitudinally of the bobbin, power driving means, a guard simultaneously positioning a plurality of bobbin-heads anterior to stripping position, and means actuated by a movement of said guard for unshipping the driving means, the means last named being adapted to permit shipping and unshipping of the driving means Without movement of the guard. I

25. A bobbin-stripper having in combination stripping means, means for presenting bobbins successively in stripping position, means for moving a bobbin in relation to the stripping means in a stripping action, power driving means, a guard overlying bobbin-heads anterior to stripping position, the guard being movably mounted and having a moderate movement in cooperation With the bobbin in each normal stripping action, and also having a greater movement upon engagement by an angularly misplaced bobbin, and means actuated by said greater move ment of the guard for effecting unshipping of the driving means and stoppage of the machine, said last named means comprising a linkage intermediate the guard and clutch providing for said normal movement of the guard Without clutch-release and efiecting clutch-release upon said greater movement of the guard.

26. A. bobbin-stripper comprising in combination stripping means, means for presenting bobbins successively in stripping position, means for moving a bobbin substantially longitudinally in a stripping action, driving means, a guard overlying the bobbinheads anterior to stripping position, the guard being movably mounted, means urging the guard to normal position, a rock-lever connected to the driving means, and a link connecting the rock-lever to the guard.

27. A bobbin-stripper having in combi nation stripping means, means for presenting bobbins successively in stripping position, means for moving a bobbin substantially longitudinally in a stripping action, driving means, a guard overlying the bobhaving in combina- Y its 1 guides between the side-plates, a rod passbin-heads anterior to stripping position, the I guard being movably mounted, means urging the guard to normal position, and a linkage connecting the'guard to the driving means and acting upon movement of the guard caused by a misplaced bobbin in a stripping action to disconnect the driving means and stop the machine, said linkage including a lost-motion device operatively intermediate the driving means and the guard and permitting normal operation of the driving means Without effect upon the guard. V

28. In a bobbin-stripping machine of the character described, a'feed-chute including spaced side-plates, spaced bobbin-barrel ing through one of the side-plates and supporting one of the barrel guides and having an outwardly-extending portion, a stripper, a movable guard overlying bobbin-heads located along the chute, driving means, a lever pivotally mounted on said outwardlyextending rod portion, a link connecting the lever to the guard, and a link operatively connecting the lever to a movable element of the driving means to effect stoppage of the machine upon movement of the guard caused by a misplaced bobbin.

29. In a bobbin-stripping machine, in combination, stripping means, means for moving a bobbin in relation to the stripping means in a stripping action, driving means, an arcuate feed-chute, a movable guard over-v lying heads of bobbins located along the chute, and a linkage connecting the guard to the driving means to disconnect the latter When the guard is moved by a misplaced bobbin in the stripping action, the linkage including a spring tensioned by the guard movement.

WILLIAM H. TROGDON.

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