US362674A

US362674A - Eichaed smith

Info

Publication number: US362674A
Authority: US
Publication date: 1887-05-10
Anticipated expiration: 1904-05-10

Description

2 SheetsSheet 1.

(No Model.)

B. SMITH.

AUTOMATIG GUIDE ROLL ATTACHMENT.

No. 362,674. Patented May 10, 1887.

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N PETER$ Pluto-Lithographer. Waihmgtcn. D. c.

(No Model.) 2 Sheets-Sheet 2 R. SMITH.

AUTOMATIC GUIDE ROLL ATTACHMENT.

No. 362,674. Patented May 10, 1887.

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A A SMAWT 1 "r STATES PATENT Trice.

RICHARD SMITH, OF SHERBROOKE, QUEBEC, CANADA, ASSIGNOR OF ONE- HALF TO THE FALL MOUNTAIN PAPER COMPANY, OF BELLOXVS FALLS,

VERMONT.

AUTOMATIC GUIDE-=ROLL ATTACHM ENT.

SPECIFICATION forming part of Letters Patent No. 362,674, dated May 10, 1887. I Application filed Drcelnher 6, 1886. Serial No, 220,966. (No model.)

To all whom, it may concern.-

Beit known that I, RICHARD SMITH, a citizen of Canada, residing at Sherbrooke, in the county of Sherbrooke and Province of Quebec, Canada, have invented certain new and useful Improvements in Automatic Guide-Roll Attachments; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the acco1npa nying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to guides, so called, by which the direction and path of travel of a continuously-traveling endless band or apron are regulated and controlled. This guidebelongs to that class termed automatic, since any great deviation in the band from its proper path of travel causes activity in its mechan-.

ism to oppositely shift the position of the guide-roll, and thus the band is caused to return and resume its normal path. Hence it will be seen that the band controls its own path of travel.

The essential feature in this automatic guide consists in journaling the guide-roll at one end upon a carriage mounted upon a sleeve-shaft which is disposed above a screw-shaft. Rota tions of the guide-roll communicate continuous rocking motion to a shaft furnished with pawls, while the activity of the latter is dependent upon the position of the continuouslytraveling endless band. The lower part of the carriage contains a nut, which engages the screw-shaft, while a toothed wheel is affixed to one end of thelatter. Thus rotation of this toothed wheel effected by the action of the pawls causes the nut to travel to and fro upon the screw-shaft, shifts the carriage, and thereby adjusts and maintains the guide-roll in the position required to control the direction and path of movement of the endless band or apron to prevent it diverging therefrom.

This invention may be considered an improvement upon that shown and described in Letters Patent of the United States No.

339,703, and issued to myself on the 13th day of April, 1886.

The drawings accompanying this specification represent, in Figure 1, a side elevation of an automatic guide apparatus embodying my invention. Fig. 2 is an end elevation of the same. Fig. 3 is aver-tical transverse section on line or a: in Fig. 1. Fig. 4 is a part plan view of the stop-lever mechanism.

In the above drawings 1 have represented a stand, A, adapted to be bolted to the frame of a paper-making or other machine at a point where the guide-roll B of the endless band is to be located. This stand or bracket A supports one end of the guide-roll with its controlling and actuating mechanism, to be hereinafter described, while the opposite end of 6 said roll is journaled in a fixed bracket at the rear or back side of the machine-frame. (Not shown.) This guide-rollis, as usual, mounted transversely of the machine, and likewise of the path of travel of the endless band, which is shown at C.

The front stand, A, is formed with two vertical posts, (t a, which furnish bearings for a stationary tubular shaft, D, horizontally dis- I posed and vertically aligned above a rotary 7 screw-threaded shaft, E, to which is affixed a y toothed wheel, F. This latter may be rotated in either direction by means of two gravitypawls, G G, which, suspended above it, are at times permitted to drop,and thus engage therewith. Thus they become alternately active or inactive, dependent upon the divergence of the endless band. Then the latter continues in its proper path of travel, both the pawls are maintained inactive. The lateral and opposite edges of the endless band bear against and wipe two feather-bars, b b, at the time when the felt has diverged and it is desired to change its course of travel. These feather-bars are adj ustably secured upon an arm, 0, which extends across the machine and beneath the felt or endless band. (See Fig. 2.) This arm is connected with a rocking plate, H, pivotally disposed in and surmounting the post a. Said plate is furthermore vertically aligned above 9 5 the toothed wheel, and is constructed with two oppositely-disposed lateral arms, (I d, which interconnect with the extremities of the pawls, preferably by chains, to permit said pawls to drop readily and engage the toothed wheel upon rocking of the plate H. A counterbalance-weight, I, is also attachedto this plate and hangs below its pivot, to render the return of the plate to a normal position more positive, and thus hold and retain both pawls inactive so long as the felt continues in its normal path of movement. These pawls G G, above mentioned, are loosely hung upon ahub, s, securely affixed at the extremity of a shaft, e, preferably rectangular in cross-section, which is located within the sleeve-shaft D and adapted to oscillate in order to actuate the active pawl and shift the position of the toothed wheel. The mechanism for effecting the oscillation of the shaft e is arranged as follows: At the end of the journal f of the guide-roll B is attached a face-plate, 9, provided with a crank-rod, J. The lower extremity of the latter is connected with a cross-head, K, sliding in a boss, L, cast on acarriage, M, which is mounted and reciprocates on the shaft-D, slotted at t. This carriage carries the adj ustable journal of the roll, and is formed with an upper and lower hub and an interconnecting webpiece. The upper hub is slotted at h, while the lower one is adapted to receive ascrew-threaded nut, t. The latter is firmly attached to the carriage and engages the screw-shaft E.

As before premised, constant rotation of the guide-roll by means of the endless band C actuates the crank-rod J and cross-head K,which, through interconnecting mechanism, produces continuous rocking of the pawlcarrying shaft 6. This mechanism consists of a connectingrod, N, which is secured at its lower end in a slot, 00, formed in the cross-head, while its upper end is attached to the extremity of a leverarm, j, extending from a hub, P, which is capable of endwise travel thereon with the carriage, as occasion requires. The slot-s h t, provided, respectively, in the upper hub of the carriage M and the sleeve-shaft D, are to permit reciprocations of the lever-army. The slot 2. performs the further office in permitting endwise travel of the arm j upon the shaft 0, as be fore explained.

A safety attachment to control excessive travel endwise of the sliding carriage in either direction is further employed, and consists of a rod, Q, provided with adjustable hubs k 10 and supported in the posts a a. This rod is aligned in the path of travel of the carriage and passes loosely through the latter. Thus when said carriage has advanced to the extreme limit of travel desired it shrugs the rod Q by means of the hubs endwise a short distance. This actuates a rod, R, which is pivotally united with it. The rod R is furthermore swung in a bracket on the post a, and is furnished at each end with lugs m m, having inclined faces which engage similar but oppositely-disposed lugs, n n, on the rear side of I and rendered inactive.

the pawls. Hence, presuming the carriage has been advanced by the rotations of the screwshaft E until it contacts with the lug 7c, the rod Q is shrugged endwise in direction of arrow 1, while the lug m is advanced to engage the lug n on the pawl G, which is now raised Reverse movement of the carriage to the other extreme similarly thrusts the lug m against the pawl-lug n, to render the pawl G inactive. Thus excessive travel of the sliding carriage M in either direction is prevented and. injury to the several parts of the apparatus avoided, which would be liable to happen were not means taken to control and render the pawls inactive when desired.

The operation of this guide mechanism is as follows: Presuming the endless band is traveling continuously in the course indicated by arrow 3, but trending in the direction of arrow 2 or against the feather-bar b, the continuous rotations of the guide-roll B actuate the crankrod J by means of the face-plate on its journal f and reciprocate the cross-head, Whichin' turn communicates, bymeans of the rod N and lever-arm j, oscillating motion to the pawlshaft e; hence it will be readily observed that the latter is continuously active, while the pawls engage the toothed wheel F only when the endless band bears against one of the feather-bars b b. I

In the present instance the bar I; is the one employed,.and the rod 0 and rocking plate H are tilted upward, permitting the pawl G to drop until it rests upon the wheel F. The latter is now advanced indirection of arrow 4, (see Fig. 2,) while the shaft E is rotated. By this latter motion the sleeve-nut z, secured to the carriage M, is compelled to advance in direction of arrow 6, and carries with it the carriage,which slides on the tubular shaft 1) in conformity with the endwise travel of the nut on its actuatingshaft. sition of the axis of the guide-roll and causes the divergence of the endless band to be reversed.

Oonverse trend of the endless band will produce pressure against the opposite bar, I), depress the bar 0, and lower the pawl G, which will now engage the wheel F and reverse the movement of the carriage with the guide-roll j ournal f. The counterbalance weight I causes both pawls to be held in a state of idleness as soon as the pressure from the endless band on the feather-bars is removed. c

When the carriage has reached the extreme point desired in the act of adjusting the guideroll, the carriage M shrugs the rod Q, and the pawl then active is at once reduced to a state of inactivity,when the carriage is stopped.

I claim- 1. The combination, with a continuouslytraveling guide-roll provided with a fixed and movable j ournal,the carriage in which the movable journal is mounted, and the hollow slotted shaft on which said carriage travels, of the This changes the popawl-carrying rod within said shaft and continuously oscillated by the guide-roll to shift the latter axially, substantially as set forth.

2. The combination, with a guide-roll and the endless band travelingthereomof the frame with the hollow fixed slotted shaft and the 1'0- tating screw-shaft, said shafts being interconnected by a sliding carriage, which is actuated at intervals of time by the guide-roll, caused by divergence laterally of said band, substantially as stated.

8. In combination with the guide-roll, the crank-rod, cross-head, and lever-arm operated thereby to oscillate the pawl-shaft, the rockin g gravity-plate with its featherbars actively induced by a continuously traveling band,and the screw-shaft rotated by pawls to move the journal-carriage of the guide-roll, as and for purposes herein described.

4. The endless band C, disposed between the feather-bars b b, thetiltinglever c, and the gravity-plate H, actuated by the latter, in combination with the pawls G G, mounted on the continuously-oscillating shaft 6 and cooperating with the toothed wheel Fand screw shaft E to move the carriage M and axially shift the guideroll, substantially as described.

5. In mechanism for controlling the path of travel of an endless belt, the guide-roll B, its journal-carriage M,supporting tubular shaftD, and actuating pawls G G, with lugs a a, combined with the movable rod Q, adapted to be shrugged by the carriage, and the pivotal rod It, with its lugs m m, adapted to engage the pawls singly, as and for purposes herein set forth.

6. The combination, with the slotted sleeveshaft D, the screw-shaft F, and the carriage M, reciprocating thereon, of the lever-arm j,with its hub P, movable endwise upon the shaft 6 within the sleeve D, said shaft being connected with and rocked by the guide-roll, its rod J, and erosshead K, substantially as stated.

In testimony whereof I affix my signature in presence of two witnesses.

RICHARD SMITH.

Vitnesses:

H. E. LODGE, F. (loans.