USRE9262E - Stop mechanism for paper feeding and cutting machines - Google Patents

Description

G. KEEBLE. Stop Mechanism for Paper Feeding and Cutting Machines.

Reissued June 22,1880.y

Wmeaeee UNITED STATES t PATENT OFFICE.

GEORGEl KEEBLE, OF LQ'VVELL, MASSACHUSETTS.

i STOP MECHANISM TOR PAPER FEEDING AND CUTTING MACHINES.

SPECIFICATION forming part of Reissned -Letters Patent No. 9,262, dated June 22, 1880.

Original No. 58,563, dated October 2, 1866.. Application for reissue iilcll April E, 1880.

To all whom it may concern:

Be it known that I, GEORGE KEEBLE, of. Lowell, county of Middlesex, and Stateot' Massachusetts, formerly a resident of Brnndish, county of Suffolk, and Kingdom of. Great Britain, have invented a new and useful Improvement in'Stop-Cutters for Paper-Mills, of which the following is a specification. My inventionrelates to machines which are used tocut continuous sheets ofpaper imo shorter sheets for reams or bundles.

The object of my invention is .to provide a stop-motion certain, quick and positive inits action, and one that shall be-easy of adjustment and of great durability. I attain this object by the mechanism illustrated in the accompanying drawings, in which similar-letters of reference indicate like parts. y

Figure 1 is a top-plan view. Fig. 2 is an end elevation of an ordinary stop-cutter'for papermills with my improvement as' applied thereto, partly in section. Fig. 3 isa reverse view of wheel 1c of Fig. 1. lFig. 4 isa, side elevation of a part ot my improvement, considerably. larger than that shown in section in Fig. 2.

In the ordinary stop-cutter for paper-mills the continuous sheet of paperis moved forward by the drum g, and when the proper length has passed under the' cutter the drum stops untilthe cutter cuts off the'sheet. This intermittent action is produced by the wheel k,- which is driven with a continuous `motion by the other. machinery of the mill, and is provided with the unge or camp and the seg-f ment l, which engages with the pinion m, which is attached to the shaft of the drum g, upon which is also'placed the wheel f, having teeth' in its periphery, into which there engages the dog c, having an end made to tit between the teeth. This dog is placed on amok-shaft, I1, to which is also attached an arm, d,vwhose position in relation to the dog is such that when the arm is depressed the dog is taken'out of engagement with the teeth of wheel'j', and its `position in relation to the segment land Hangep is' such that just before the segment'l comesl into engagement with the pinion m the ange p will depress the arm d, and s soon as the last tooth of the segment has cleared itself of the pinion the ange 11 releases the arm d, and

the rock-shaft and dog are free to move, s0

that' the dog will return into engagement with the teeth out' whcei f. This return hasbeen commonly effected prior to this my invention by the use of a. tlat spring secured to some portion ofthe frame and extending along beneath .the arnLd, with its en d in contact with the arm,

arc of movement, requires a spring of great I stil'ness and consequently of little sensitiveness and of limited durability.

In order to avoid this-objection able construction and attain the object of my invention I dispense with the spriugattached and operating as described, or any spring operating directly against the arm d or dog c, and attach to the rock-shaft b the arm or lever h, which is extended from the rock-shaft. on substantially the opposite side from the arm d. Attached to this arm and below it is the spring D, connected with the lever h by the rod E and strap or link fi.

B is a tube, in which the rod E moves up and down. This tube is attached to the stand A, which is fastened to the floor under the end of the lever h, and is provided apart of its length with a slot,rF,vthrough which a key, 0, can be inserted ina hole near the end of rod E. 0n top of this key I place a. collar, G, and attached to the top of the tube the cap C. Between the cap and the collar l place the springD, which, pressing down upon the collar, acts upon the rod, and through it upon the lever h. The tube B serves the purpose of a guide to prevent the spring D from twisting, knuckling, or throwing its middle portion out of line with the rod E, and thus permits the use ot' along spring, or one acting through a great distance, and consequently one requiring lighter tension and of greater scnsitive ness; and as thev lever h can be' made as long as desired without interfering with the other .Q ansa IVs mechanism. the strap can beattached at such a distance fromlthe rock-shaft as will permit the use ot' such spring. As the spring has no direct bearing.,1rv on the arm (1,1111 friction bei tween the spring,r and other parts is avoided. Besides this, the weight of the lever hr and rod E, balancing the weight ofthe arm d and dog c, or a little cverbalancing it, leaves the spring,

only the inertia of the parts to overcome and greatly assists in the quick engagement of the dog`r c with the wheelf, on which depends the accuracy with which the sheets are cut, because it' the dog fails to quickly engage with the wheel the momentum'otl the drum: will carry forward under the cutter a greater length of thel continuous sheet.

Besides Vthese advantages the tension ofthe spring 'can be altered by the operator, without the useof tools. hyfshorteniug up the strap i by means of its buckle, and when it is desiredl to disconnect thc spring, so that the machine can be used on rolls instead of sheets, it can be readily done by `disengaggungg' the same,

lnstendnf a spiral spring;` I sometimes use an elliptic or iat spring, which may be applied` `to the tube B, and operated in substantially the same manner'as t'he spiral spring, las shown in Fig'. 2. l

It "will becbserved that in place of the old unbalanced mechanism, difficult to adjust and' ope'rating'in opposition to wellknown natural laws, and of inconvenient.arrangement, I have substituted'a well-balanced though simple device, which can be readily adjusted to answer t-he`d'creut requirements which the machine is` called upon to meet.

1:. The combination of the drive-wheel k, provided with the cam pand segment l, which engages with the pinion m, the wheel f, and rockshat't Vb, provided with the arm d, doge, and

l'cve'r h, to which is connected the spring D,

substantially as described. Y

2. The combination, in a stopcutter for paper-mills, of a rock-shaft provided with a dog and an arm, ot' a spring, lever, and connecting devices,substantially as described.

3. In combination, in a stop-cutter, the drum g, wheel f, wheel m, wheel k, provided with the segment l, rock-shaftv b, provided with the arm d, doge, and balance -lever h, the spring D, strap i, and tube B, substantially as described.

GEORGE KEEBLE.

Witnesses v LEPINE C. RICE, E. G. RICE.

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