US404709A

US404709A - Driving and belt-shifting mechanism

Info

Publication number: US404709A
Authority: US
Publication date: 1889-06-04
Anticipated expiration: 1906-06-04

Description

3 Sheets-Sheet 1.. E. R.HYDE. DRIVING AND BELT SHIFTING MECHANISM. .709. Patented June 4, 1889.

(No Model.)

- wuewto o N4 PETERS, PhnIo-Liihogmpher, Wnhinghzn. D C.

(No Model.) 3 sheets-sheet z. E. R. HYDE. DRIVING AND BELT SHIFTING MEGHANISM.

Patented June 4, 1889.

N. PETERS. Phnloiilhographer, Washingiom n. c

(No Model.) 3 Sheets-Sheet a.

E. R. HYDE. DRIVING'AND BELT SHIFTING MECHANISM. No. 404,709. Patented June 4, 1889.

N. PETERS. Phalmulhognphnr. Washinglon. [7.0.

' UNITED STATES PATENT OFFICE.

ELVVIN R.- HYDE, OF SPRINGFIELD, MASSACHUSETTS.

DRIVING AND BELT-SHlFTING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 404,709, dated June 4, 1889.

Application filed cthrnary 1, 1888. Serial No. 262,608. (No model.)

To aZZ whom it may concern.-

Be it known that I, ELWIN R. HYDE, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Driving and Belt-Shipping Mechanism for Machinery, of which the following is a specification. The present invention relates to a mechancal movement particularly designed for use in connection with a machine capable of use for grinding shafts by one or more rotatable grinding wheels thereof, although, as will be apparent from the description hereinafter given, the said mechanical movement is applicable for employment in a variety of situations other than as hereinafter particularly illustrated and described, the object of which is to secure automatic successive reversals in the direction of movement of a traveling carriage within given limits under a continuous speeding of a driving belt or bolts, and without any appreciable loss of time or motion, and in an even and steady manner without arring or wavering; and the invention consists in the construction and combination of parts, all substantially as will hereinafter more fully appear, and be set forth in the claims. I

In the accompanying sheets of drawings mechanisms comprising the present invention are illustrated, and in Figure 1 is illustrated a shaft-grinding machine partially in side elevation and partially in longitudinal vertical section. Fig. 2 is aview similar to Fig. 1 and essentially of the same machine as therein shown, but illustrative of some modifications in detail, as will hereinafter appear. Fig. 3 is an end elevation of Fig. 2. Fig. 4 is an enlarged cross-sectional view of the machine on line a: on, Fig. 2; and Fig. 5 is a horizontal sectional View of a portion of the machine on the plane indicated by line 3 y, Fig. 2. Fig. 6 is a detail view hereinafter referred to.

The hereinbefore-mentioned shaft-grinding machine comprises the bed or frame A, supported on suitable standards B, and having head-stock O and tail-stock D, each having a mandrel for supporting and rotating a shaft, and the former is provided with speed-pulleys E, to be driven by a belt from a pulley on an overhanging shaft, all as usual in lathes and similar machines. Traveling longitudinally upon the bed A, in suitable ways thereof, is a carriage G, provided with suitably guided transverse slide blocks or carriages H, in suitable j ournal-bearings of which are emery or other grinding wheels or disks L L, adapted through pulleys K on their axes to be driven by belt-connections with a 1011- gitudinally-arranged drum P, mounted on an overhead shaft.

A feed-screw J, suitably mounted in the ends of the bed A and extending longitudinally thereof, engages with an extension or part of the longitudinallyraveling carriage G, and under the rotation of said feed-screw the said carriage G is caused to move lengthwise of the bed in one or the other direction, according to the direction of rotation of said feed-screw; and it will be observed that with the transverse carriages H so moved and set as to present the peripheries of the grindingdisks L L against the periphery of the centered shaft, and under the rotation of the said shaft and of the grinding-wheelsin relatively reverse directions, a rotary and concentric grinding of said shaft is secured at the place of contact of the grindin g-wheels therewith; and in practice the grinding-wheels are caused to travellongitudinally on the shaft being ground as great a distance as desired, and then, under the reversing mechanism to be described below, said grinding-Wheels are caused to retraverse the shaft, such back and forth longitudinal movements of the grinding-Wheels being continued along the shaft until a uniform grinding thereof has been effected, or otherwise, as desired; and it is to the mechanism for securing the driving of the feedscrew and a reversal of its rotation that the most particular description will I be given herein and as follows: The said feed-screw, at its one end portion a, projects beyond the end of the frame or bed, and, 'as seen in Fig. 1, has mounted thereon two loose pulleys 10 and 12 and a fixed pulley 11 intermediate thereof, all of uniform diameter. Two driving-belts l3 and 14, the former open and the latter a crossed belt, are driven from an overhead shaft, as shown, and engage with the pulleys 10, 11, and 12 in the usual manner of arranging two belts, a tight and two loose pulleys side by side, for imparting a reciprocating rotary motion to a shaft on which said pulleys are placed by so shipping said two belts simultaneously as to bring first one and then the other of said belts onto said tight pulley 11. There is also, as shown, mounted upon one end of said feed-screw shaft a balance or fly wheel 15.

As it will be frequently found desirable and preferable in constructing certain machinery embracing the features and essentials of the present invention, and for purposes of mechanical convenience and economy, in lieu of mounting or connecting the pulleys and balance-wheel directly upon or to the said main feed-screw shaft J, as described, and shown in Fig. 1, a disposition of said pulleys and balance-wheel maybe made as illustrated in Figs. 2, 3, and 5, which, as will be obvious, is in substance and effect the same as the application thereof shown in Fig. 1, and this latter-mentioned disposition and connection of the pulleys and balance-wheel is as follows:

An independent longitudinal shaft 8, par allel to the screw-shaft J, is suitably mounted for a free rotation in jom'nal-bearings of the bed and extends outwardly therefrom, and upon this shaft 8 are placed the loose and fixed pulleys 10, 12, and 11 and the fixed balance-wheel 15, and the belts 13 1 are arranged in relation thereto as before described, and said shaft 8 is provided with a piniongear 7, which meshes with. a gear 6, which is secured on the end a of the feed-screw shaft .T; and from the above it is plain that any effect produced through the action of the belts, pulleys, and balanceavheel upon the independent shaft 8, connected to the feedserew J by gearing, substantially as described, is in substance and effect the same as if said pulleys and balance-wheel were placed directly on the shaft J and there operated by the belts, as shown in Fig. 1..

Firmly secured upon a shaft 16, capable of a longitudinal slide, and guiding in suitable bearings, as at b l), of the bed, and moving with said shaft, are belt-shifting hooks or dogs 17 and 18, embracing or in contact with the said

belts

13 and 14. The said belt-shifter shaft 16 is constrained to move longitudinally without rotation by being provided with an offset parallel shaft or red 19, also playingthrough the guides I), as shown, or the beltshifiier shaft may be splined or squared.

M represents a longitudinal rod capable of a lengthwise slide along the side of the bed through the bearing-lugs (Z (I, and on this rod M are adjustable dogs f f, one located at either side of the carriage G and projecting into the plane of travel of some portion thereof. A horizontal shaft 20 extends transversely of the frame A under the headstock and below the beltshifter shaftld and longitudinal dog-carrying rod M, and has suitable bearings in the frame for a partial rotation, which is secured at the time of longitudinal movement of the shaft M by the means of a crank-arm 21, secured on the said shaft 20, projecting upwardly therefrom and receiving through its upper slotted end a pin 22 of a collar 23, secured on said dog-shaft M, and said shaft 20 is also provided with an upward]y-extending crankarm 24, firmly secured thereto, its upper slotted end 25 receiving a pin 26 of a collar 27, secured on the belt-shifter shaft 16.

Intermediate of its height the crank-arn'i 2 1 is provided with a right-angled lug 28, having beveled or converging ends, as shown, which lug 28 will be hereintermcd an arrow head, and located in the same horizontal plane therewith is another arrow-head 30, similarly pointed or angular at its end, adja cent to ,that of the arrow-head 28, and by its other end it plays through a horizontal hollow barrel 32, supported on a standard 31 against a comparatively stiff spring 33,whcreby it is kept to a firm bearing upon and against the arrow-110M128 on the crank-arm In the operation of the machine, for instance, with the uncrossed belt 13 shifted upon. the central fixed pulley 1.1. and speeded in amanner either directly or through the gearing described to turn the feed-screw J so as to cause the travel of the main grinding-wheel carriage G from right to left, such right to left travel will continue until the carriage G or some portion thereof has reached and abuts against one of the dogsf on the shaft M, when the latter is moved longitudinally with the carriage, and, through the crank-arm engagement between said shaft M and the horizontal shaft 20 and the crank-arm engagement between said shaft 20 and the belt-shifter shaft 16, before described, the latter is moved longitudinally, carrying the outerbeltl3 off from the fixed pulley 11 onto the outer loose pulley 10 and the inner crossed belt onto the said fixed pulley, and there is an instant at this period of the operation of the machine when the inner belt 14; is just as far on the fixed pulley as the outer belt 13- is off the same, and therefore the said belts exert counter forces upon the fixed pulley; but the mon'icntum of the parts, or the increased momentum secured by the balance-wheel .l 5, insures a continuation of the described rotation of the fixed pulley until the said outer belt 13 is forced entirely ollt the same, which is hastened by the operation. of the arrowheads 30 and 29, before described, it being understood that the said arrow-head 28 is so adjusted that during the right to left feed of the carriage G it lies inside or to the right of the arrow-head 30; but at the time the belt shifter shaft has reached the point to place the said drivii'lg-belts to exert the equally counter forces on the said fixed pulley described the apex of the arrow-head 28 has been carried just past the apex of arrow-head 30, when, under the action of its spring, said arrow-head 30 is projected into the position seen in the drawings, Figs. 4 and 5, the result of which is that the said crank-arm 24, on. which said arrow-head 28 is secured, is still further swung, carrying the belt-shifter shaft 16 still farther lengthwise and sufficiently to throw the belt 13 entirely off and the belt 14 entirely on the fixed pulley 11 against the decreasing momentum of the balance-wheel, and securing an instantaneous reversal of the rotation of the feed-screw and of the travel of the carriage until the same in its then left to right travel reaches the dog f at its righthand side, when, as will be now clearly understood, an automatic reversal of the movements of the operating parts is secured, and so on alternating as long as desired.

WVhile under some construction s and weightings of the parts of the herein-described machineas, for instance, of the fixed pulley 11, or of the gearing 6 7 when employedsuch pulley or gears, or both, might be made to constitute in themselves and perform the f unctionsof a balance wheel or wheels in addition to those required of them as driving-pulleys or motion-transmitting gears, and an independent balance-wheel might in such instances be dispensed with, it is preferable to employ same, as it secures, in addition to certainty of operation of the parts, increased steadiness thereof.

The provision of the crank 21, longitudinal movable dog-shaft M, engaging therewith, and the extension of the carriage G to abut against the dogs on said shaft render the reversal of the travel of the carriage automatic; but such parts may be dispensed with and yet leave the machine capable of operation, for, as will be evident, a partial rotation of the shaft 20 in the proper direction will secure such reversal, and such movement of the shaft 20 may be effected at the hands of an operative from time to time as maybe advantageous for certain work.

In Fig. 6 an obvious modification of the arrangement of the pulleys is shown, which consists in making the two outer pulleys 11 12, the fixed pulleys, and the intermediate pulley 10 the loose or idler, theeffects under similar engagement or shifting of the belts being the same as before described in connection with the arrangement of the pulleys shown in Figs. 1 and 2.

\Vhat I claim as my invention is- 1. In combination, a bed having slideways, a carriage capable of a reciprocatory movement thereon, a feed-screw shaft engaging said carriage, provided with loose and fixed pulleys 10, 12, and 11 and having a fixed momentum-wheel 15, the reversely-speeded

belts

13 and 14, and a belt-shifter engaging said belts, substantially as described.

2. The combination, with a reciprocating carriage and a suitably-journaled feed-screw engaging therewith, having loose and fixed pulleys 10, 12, and 11 and'a balance-wheel, of a belt-shifter shaft engaging said belts, a horizontal transverse shaft 20, provided with a crank-arm 24, engaging said beltshifter shaft and having the arrow-head 28, and an independent spring-actuated arrow-head 30, substantially as and for the purpose described.

3. The combination, with a suitably-journaled feeding-screw shaft J, provided with a gear, and a reciprocating bed engaging said shaft J,a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11, and

reverselyspeeded belts

13 and 14, of a belt-shifter shaft engaging said belts, a horizontal transverse rotatable shaft 20, provided with a crank-arm 24, engaging said belt-shifter shaft, which has the arrowhead 28, and an independent spring-actuated arrow-head 30, substantially as and for the purpose described. P

4. The combination, with a suitably-journaled feeding-screw shaft J, provided with a gear, and a reciprocating bed engaging said shaft J, a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11 and abalancewheel, and reverselyspeeded belts 13 14, of a belt-shifter shaft en-- gaging said belts, and a transverse rotatable shaft 20, provided with a crank-arm 24, en-

gaging said belt-shifter shaft, substantially said belt-shifter shaft, and having the arrowhead 28, and an independent spring-actuated arrow-head 30, substantially as and for the purpose described.

6. The combination, with a bed or frame, a suitably-journaled feeding-screw shaft J, provided with a gear, and a carriage engaging said feed-screw shaft and adapted to travel along said bed, the shaft M, provided with the dogs ff, a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11, and reversely-speeded belts 13 14, of a beltshifter shaft engaging said belts, a horizontal transverse shaft 20, provided with a crankarm 21, engaging said dog-shaft M, and a crank-arm 24, engaging said belt-shifter shaft, which has the arrow-head 28, and an independent spring-actuated arrow-head 30, substantially as and for the purpose described. 7. The combination, with a bed or frame, a

,suitably-journaled feeding-screw shaft J, provided with a gear, and a carriage engaging said feed-screw shaft and adapted to travel along said bed, the shaft M, provided with the dogs ff, a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11 and the balance-Wheel 15, and the reversely-speeded belts 13 14, of a beltshifter shaft engaging said belts, a horizontal transverse shaft 20, provided with a crankarm 21, engaging said dog-shaft M, and a crank-arm 24;, engaging said belt-shifter shaft, which has the arrow-head 28, and an independent spring-aetuated arrow-head 30, substantially as and for the purpose described.

8. The combination, with a bed or frame, a suitably-journaled feeding-screw shaft J, provided with a gear, and a carriage engaging said feed-screw shaft and adapted to travel along said bed, the shaft M, provided with the dogs ff, and the adjustable collar 23, having lug 22, a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11 and the balance-Wheel 15, and the reversely-speeded belts 1.3 14, of a boltshifter shaft 16, engaging said belts provided with the adjustable collar 27, having lug 26, a horizontal transverse shaft 20, provided with a slotted crank-arm 21, engaging said lug 22, and a slotted crank-arm 24, engaging said lug 26, provided with the arrowhead 28,

and an independent spring-actuated arro\v-' head 30, substantially as and for the purpose described. it

9. The combination, with a bed or fra1ne,a suitably-journaled feeding-screw shaft J, provided with a gear, and a carriage engaging said feed-screw shaft and adapted to travel along said bedythe shaft M, provided with the adjustable dogs ff, a rotatable shaft having a gear meshing with said feed-screw gear and having mounted thereon loose and fixed pulleys 10, 12, and 11 and the balance-Wheel 15, and the reversely-speeded belts 13 14, of a belt-shifter shaft 16, having belt-shifting hooks 17 1.8, and the supplemental parallel guiding-shaft 19, ahorizontal transverse shaft 20, provided with a crank-arm 21, engaging said dog-shaft M, and a crank-arm 24, engaging said belt-shifter shaft, the latter having the arrow-head 28, and an independent spri n actuated arrow-head 30, substantially as and for the purpose described.

ELWIN R. HYDE.

itnesses:

WM. S. ,HELLOWS, G. M. CHAMBERLAIN.