US1036737A - Shifting device. - Google Patents

Description

E. 0. SMITH.-

SHIFTING DEVICE.

APPLICATION FILED NOV. 0, 190a.

Patented Aug. 27, 1912.

3 SHEETS-SHEET 1.

lllllllll INVENTOR WITNESSES:

COLUMBIA PLANOGRAPH c0., WASHINHTON, D. c.

E. 0. SMITH.

' SHIFTING DEVICE.

APPLIOATION FILED NOVPG, 1908.

Patented Aug. 27, 1912.

3 SHEETS-SHEBT 2.

INVENTOH.

WITNESSES.

COLUMBIA PLANOGRAPM c0., WASHINGTON. D. c,

E. G. SMITH.

SHIFTING DEVICE. APPLICATION FILE-2D Nov, 9 1908.

1,036,737, Patented Aug. 27, 1912.

3 SHEETS-SHEET 3.

AI Q

F/y UT WIT/VESSESI lA/Vf/VTO/Z' COLUMBIA PLANDORAPH C0,, WASHINGTON, u L

EDWIN 0. SMITH, 0F SEEKONK, MASSACHUSETTS.

SHIFTING DEVICE.

Application filed November 9, 1908.

To all whom it may concern:

Be it known that I, EDWIN C. SMITH, a citizen of the United States, residing at Seekonk, in the county of Bristol and State of Massachusetts, have invented a new and useful Shifting Device, of which the following is a specification.

My invention relates to belt shifters, and particularly to that class known as pull belt shifters in which the movement of the belt shifter fork in alternately opposite directions is effected. by pulling the operating handle and always in the same direction.

The following specification with the accompanying drawings fully discloses my invention, the drawings representing respectively:-Figure l, a front elevation of the.

preferred embodiment of my invention. Fig. 2, a plan view of the same in part section on the line o;a, viewed in the direction of the arrow Z) Fig. 1. Fig. 3, a sectional detail of the wheel 2, showing the mode of mounting the pins i and 5. Fig. 4, a part view of the cover 35 showing the shaped guide 36, and devices for locking the member 3 against displacement. Fig. 5, a front elevation of a modification. Fig. 6, a plan view of same, sectional on the line 0 0, but showing the wheel in section on the line (Z-d. Fig. 7 a detail of the wheel 60. Figs. 8 and 9, details of the slide 50. Figs. 10, 11 and 12, further modifications. Fig. 13 is a view of the head of member 3 looking in the direction of the arrow at of Fig. 2. Fig. 14; is a view of the same looking in the direction of the arrow at of Fig. 13. Fig. 15 is a view of the same looking in the direction of the arrow 0 of Fig. 13.

My invention comprises essentially a wheel 2 which is capable of oscillation through substantially a half rotation, a reciprocating member 3, preferably in the form of a connecting rod or pitman, and two pins or pawls. 4 and 5 which alternately engage the reciprocating member 3 and coact therewith as crank pins. The result of this action is to shift the member 3, together with whatever parts or apparatus are therewith connected, alternately from one extreme to the other of its extent of travel. The reciprocating member 3 is connected with the cross head 6 which in turn is secured to the shipper .rod 7 by the set screw 8, and there is also secured to the shipper rod 7 whatever belt guide may be employed, represented Specification of Letters Patent.

Patented Aug. 27,1912.

Serial No. 461,819.

here by the finger 9. The shipper rod 7 is prevented from turning, with resultant dis placement of connected parts, by the forked arm 10 which engages the guide 11 on the frame 12. The extremity of the reciprocatlng member 3 is shaped substantially like the head of a hammer, and in the face of this head portion which is opposed to the face of the wheel 2, is a groove or channel that roughly approximates in form an inverted L, see Fig. 13.

Starting from its extreme left hand position (Fig. 1) the reciprocating member 3 is shifted by engagement of the pin 4 with the edges 14 and 16 of the channel in the head of said member. As the pin 4 revolves about the axis of the wheel 2, the latter turning in the direction of the arrow f Fig. 1, it carrice with it the member 3, the head of the latter describing an orbit corresponding to that of the pin 4. This is best shown at E- Fig. 1, where the member 3 is indicated by broken lines. The action.is essentially that of a crank and connecting rod or pitman.

'VVhen the pin 1 has traveled through half a revolution it has carried the reciprocating member 3 to the extent of its travel in which position its exposed portions are represented by full lines in Fig. 1. As the pin 4 returns to its initial position, it engages the edge 14 and raises the head of the reciprocating member 3 but recedes from it, passing out through the lateral of the L shaped channel. This is best illustrated at G in Fig. 5, where, though the details of construction differ from the preferred construction, the action is the same. As the head of the reciprocating member 3 traveled from left to right under action of the pin t it was raised above and away from interference with the pin 5 which was concurrently moving in the direction of the arrow h Fig. 1. In returning to its own initial position. the pin 5 encounters the head of the member 3 but it engages the beveled surface 17, see Fig. 15 over which it rides and enters the L shaped channel. When the wheel is again turned forward 2'. a. so the pin t travels in the direction of the arrow f and the pin 5 in the direction of the arrow hthe pin 5 engages the edge 15 of the L shaped channel. By means that will be later disclosed, the reciprocating member 3 is withheld from depression below the position indicated by full lines in Fig. 1. Its head cannot follow thelll orbit of the pin as it'does-that of the pin 4, and the pin 5 therefore acts on it with the same action as that of a crank pin, with a slotted cross-head. This is best shown at K in Fig. 1, where the pin 5 and thehead of the reciprocating member 3 are shown at near mid position between extremes of travel. The movement of the pin 5 is con tinued to the extreme of its halfrevolution and then returned to its initial position by a; reverse movement of the wheel 2;, 0 Gone currently, the pin t returns to its initial position but as it approaches the same, it encounters the head of the reciprocating L member 3 at thebeveled surface 18, see Fig.

14' over which it rides and again enters the L shaped channel in. saidhead.

The form and disposition of the surfaces 17 and 18 may be best understood by reference to Figs. 13, 14 and: which show the head of the member 3 on an enlarged scale. The pins 4' and 5- are mounted in the wheel 2 in the manner indicated by Fig. 1 and Fig. 3. Springs 91 and 19: project the pins from the wheel 2, to enter the L shaped,

channel. 01? the head ot the reciprocating member 3. Referring toFig. 3 which shows I changed. The only other alteration, re-

the pin 5, eachpin has an enlarged body 20 which is tubular and within which is the projecting spring 19. The body ot the pin is slid able in the bore 21 of the wheel 2, and; is held thereinby the Washer 22which is secured by; two screws 23, formingan abutment for the; shoulder 24:,

The wheel 2- is operated by thehandle 25 on the cord 26, which latter lies in agroove 27 of said Wheel and issecured" toathe wheel at any convenient and suitable point at 28. The wheel 2 is prevented from turning more than a half rotation'by the stop 29 which. encounters; the seat 30 at one extreme of its movement and the seat 31 at the other extreme, It is, returned; after operation, by the return, spring- 32 which is connected with the wheel 2 by the cord 33 and is anchored to the framelQ, by theearor lug 34, Intront oi; the wheel is a cover 35 on which is a, guide 36: 0t arcuate form, whose functionis to. sustain the reciprocating member 3:, it by chance the pin! 4 should be disengaged' therefrom; before completing; its action, For this purpose a, projection 37 is provided on. the, reciprocating member 3 which, over-rides the'arcuate guide afore said, the latter being conformed to; the path of travel of the projection. 37. jAlso there is. a guide or track 38 which both supports the reciprocating member in its horizontal position and prevents its; depression below that position, thus compelling the-pin 5- to act' with theisame. effect on the'said member 3, as that of, a crank pin on a, slotted crosshead. Butgasthe pin 5 nears the-end of. its

travelit'is rising. and; tends-to raise the re:

'ciprocating member 3, which tendency. is

joined parts, is restrained and locked from self movement beyond the extremes of its designed extent of travel by suitable abut ments 10 and 41 which are opposed to the projection 37. Movement inward, toward bore 21.

the axis of the wheel-2 is prevented when the reciprocating member 3 is to the right, as indicated in Fig; 1, by engagement of the edge 16 with the pin 5. At the opposite extreme of itstravel, to the left in Fig. 1 a

lock 42 is formed on the cover 35, behind which the projection 37 drops as indicated at 37 To provid'eclearance tor the projection 37 as it rides overthe stop 12, the straight guide is'inolined slightly at its eX- treme end; 413, to conform to theinclination of thestop 42.

It isv possiblerto arrange this devi'ceso as to secure'difierent extents of throw witln the same device and withbut little modification In:- Fig. 3 I have shown a second bore 21 closer to the axis of the wheel 2:than the Obviously, with such a change in location, of the pins, their extent of action is quired is a substitution for the cover used :with the longer travel, of a different one ;with the arcuate guide ofdifierent dimenlsion to accommodate the shorter extent of. *travel. 'Because such a. cover would differ onlywit-hrespect to its dimensions and not in form from the cover shown, it 18 1101;

' illustrated.

The curvature of the edge 16; of the- L' :fshaped channel in, the headof: the recip.ro-: "eating member 3, isof sutficiently'small; 11a ;dius toipermit the pin, 5;to leave the-chan radius of action;

nel when set at its closest! positiontothe axis of the wheel 2;, e; in; its position of least To recapitulate,,the action ofthe device is as follows: Assuming thatthe'reciprocatingmember'is to the left in, Fig.1, on, pulling the handle 25, the wheeli2- is turned; the tiwo pins 4 and 5'revolving about; its axis in the= directions ofthe twoarrows f; and 7:; respec tively. The pine; picks up the head? of the reciprocating membenB'; and carries it" above and overthepin 5 togits extremeof travel,

the two 'coacting asa crank and; connecting rod. The handle 25 being: releasedxthe wheel 2 is returned to-its init'ialipositionbythe return spring 32; acting through the agencies-already'described. As the pins 1 and 5\return to theirinitial positions, the pin 5, encounters and" rides up. thefinclined surface 17 of the head of, the reciprocating member 3, and; enters the- L shaped channel thereof. 'At-the next'pulls of the handle 25, the pin 5, carrie.dby the wheel 2,. revolves about the wheels axis, in the directionof the arrowh, the pin 4 concurrentlymoving' in the direction of the arrow f and above the member 3. Under coaction of the pin 5 and head of the reciprocating member 3 as of a crank and slotted crosshead, the reciprocating member 3 is propelled to the extreme of its travel from which it originally started. l/Vhen the handle 25 is this time released, the two pins 4 and 5 return to their starting points, this time the pin 4 encountering and riding over the inclined surface 18, into the L shaped channel aforesaid.

Obviously, the corporeal embodiment of my invention may be variously modified.

Figs. 5 and 6 illustrate one form of such modification. Here, that element which corresponds with the reciprocating member 3 is a slide 50, and it is slidably mounted in the crosshead 51. In this case, there is no crank and connecting rod action, but in both cases the act-ion is that of a crank with a slotted crosshead, the slide 50 moves on the crosshead 51 and the wear and friction of action occurs practically between the two latter members alone. In the return action, the slide 50 is stationary with relation to the crosshead 51, and the friction and wear of action occurs almost entirely between the pin 53 and the slide 50. In this form of construction the slide 50 is prevented from falling below its proper osition by engagement of the pinv 54 of the slide 50 with the end of the slot 55 in the crosshead 51. The return spring 56, acts through the cord 57 which, to insure suitable ran e of spring action with compactness of structure, is led over an idler sheave 58 to the hub 59 of the wheel 60. The two pins are retained in the wheel 60 against action of the springs 61 and 62, by nuts 63 and 64: in stead of by the washers of the preferred construction shown in Fig. 8. As indicated in Fig. 7, the cord 57 may roll up on a plain une'rooved hub.

lfims. 8 and 9 show more clearly the form of the slide 50, Fi 8 showing more exactlv the form of the l. shaped channel, so called, and Fig. 9, the beveled or inclined surface 65 which corresponds to the surface 18 on the head of the reciprocating member 3 in the preferred construction of Fig. 1.

Figs. 101l and 12 show a further modification in which the shipper rod is arectangular bar and therefore requires no crosshead to prevent it from rocking over. The reciprocating member 71 is mounted directly thereon and prevented from excessive movement by the projections 72 and 73 which encounter a projection 74 on the shipper bar. The pins 7 5 and 7 6 move in the direction of the arrows 00 and 3 respectively and are mounted in the wheel 77 which is simply shown in part in Fig. 11, but which has the same general form and arrangement as has the wheel. 2 of Figs. 1 and 2 or the wheel 60 of Figs. 5 and 6 and 7 Further,

the pins 75 and 76 are projected by flat springs as indicated in Fig. 11 by 78, the corresponding pin being prevented fromgoing through the wheel 77 by its head 79.

In all these constructions a manifest advantage lies in that each pin operates from the dead center thereby starting the reciprocating member with a gradual acceleration. Likewise, both pins engage the reciprocating member initially at the same point.

Therefore, without limiting myself to the precise form and arrangement of parts, I claim:

1. In a shifting device, the combination with a wheel that is oscillatable through substantially a half rotation, and a reciprocating member, of two pins carried by the wheel that alternately engage the reciprocating member to shift the latter in alternately opposite directions.

2. In a shifting device, the combination with a wheel that is oscillatable through substantially ahalf rotation, and a reciproeating member, of two pins carried by the wheel that alternately engage the reciprocating member to shift the latter in alternately'opposite directions, one pin concur rently lifting and propelling the reciprocating member, the other pin only propellingthe reciprocating member.

3. In a shifting device the combination with a wheel and a reciprocating member, of two pins carried by the wheel that alter'nately engage the reci rocating member in alternately opposite directions, one pin engaging the reciprocating member and coacting therewith in crank and connecting rod fashion to propel it, the other pin coacting with the reciprocating member in crzink and slotted crosshead fashion to prope it.

4:. In a shifting device the combination with awheel and two pins carried by the wheel, of a reciprocating member alternately engaged by the two pins and thereby shifted in alternately opposite directions, and having a projection 32, and a stop 4K2 fixed to engage the projection to lock the reciproeating member against movement.

5. In a shifting device, the combination with a wheel and two pins carried thereby, of a reciprocating member alternately engaged by the two pins and thereby shifted in alternately opposite directions, and having a projection 37, and a guide 36, conformed to the path of travel of the projection 37 6. In a shifting device, the combination with a wheel and two pins carried thereby, and a reciprocating member alternately engaged by the two pins and thereby shifted in alternately opposite directions, with a projection 37, of a cover 35, formed with an arcuate guide 36, two abutments 40 and 41,121 stop-B and 'a' ledge 3,8 t0 uphold the the commencement of eachvpropulsion as the reciprocating member, all said fonna-tibns other, and means-t0 operate-the oscillating beingmade to engagethe projection- 37. 1 member. 7. In a, shifting device, thdcombinati oni In-testimony whereofll affixmysignature 5 with a refiiprczcatiqgnemlczler, t10f an oscillffl'a presence of twd Witnesses;

1ng-mem er,. WG 111 epen en' plus carme M bytbeoscillatingmember to propel the re EDWIN SMITH ciprocating member in alternately opposite, 1 directions, each engaging the reciprocating: 1:0 member at substantially the, same point: at: x

Witnesses:

CROWNJNSHIELD, FRANK J; ROWSE.

Gopdesot flfisp atenf-my beobtgihedfor fivqcents each, by ac mressing the c'ommissioner of Patents,

' w'alhi'ngton, D. C.

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