US843471A - Gearing. - Google Patents

Description

PATENTED FEB. 5, 1907. W. J.`LLOYD.

GEARING.

APPLICATION FILED JULY lz. 190e,

1HE Nanni: sums co.. wa'smycrau. D. c.

No. 843,471. PATBNTED FEB. 5, 1907. W. J. LLOYD.

lGrEARING. APPLIOATION FILED JULYm. 1906.

3 SHEETS-SHEET 3.

Witnesses y lwmom 1ML Nam-us PErrRs co., wAsmNcfaN, :L l:4

drive from the principal or driving shaft to .of the motor-car, showing the improved driv- WALTER Jer-1N Litern, or `veiiiiirncanin, ENGLAND.

GEARING.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed July 12,1908. Serial No. 325.923.

To a/ZZ whom, it may con/cern,.-

Be it known that I, VALTER Jol-inv Libri, a subject of the King of Great Britain, residing at Quadrant Cycle Vorks, Sheepcote street, Birmingham, England, have invented certain new and useful Improvements in i Gearing, of which the following is a speciiication.

The said invention consists of the improvements hereinafter described in the driving and reversing mechanism of motor roadvehicles and other motor-propelled bodies such, Jfor example, as motor-boatsthc said improvements having for their principal objects to dispense with ordinary spur-wheels, pinions, and bevel-wheels commonly eniployed in the said driving and reversing mechanism; to obtain a gear which is practically noiseless when working as well as when changes in the gear are being effected and which is free Jfrom backlash, to prevent inadvertent or accidental extreme changes of speed-that is, a change from the .lowest to the highest speed or the reverse wlnle the vehicle is in motion-and to obtain a direct the secondary or chain-wheel shaft with all speeds as well as when reversing.

I will describe the sald invention as arranged for the driving of a motor road-vehicle in which four different forward speeds and a single reverse ofthe same speed as the slowest `forward speed are provided; but l wish it to be understood that more or :fewer than iiour forward speeds may be used without increasing the numb er of gear-wheels employed I will describe the said invention in connection with the accompanying drawings, Figure 1 of which illustrates a portion of the frame ing and reversing gear in side elevation. Fig. 2 is a plan of the same. Fig. 3 is a cross-section on the dotted line X X, Fig. l. Fig. 4 represents a portion of the arrangement in side elevation with the parts in their unlocking positions. Fig. 5 is an .endvelevation of certain ofY the parts at the right-hand end of Fig. 1 looking in the direction of the arrow in the said Fig. l.

The same letters oi` reference indicate the same parts in the several figures of the drawings.

d is the driving-shaft of the gear, which shaft is in line with and is connected directly to and disconnected Jfrom thc motor-shaft l (not shown) by means of a clutch, as is usual. l

B b are pin or lantern wheels on a square portion of the shaft a. The said pin or lantern wheels B l) are connected together by means of the depending arms c c and tube or sleeve d on the guiding-rod e parallel with and below the driving-shaft a.

By sliding the tube d in one direction along the guiding-rod e by the means hereinafter described the forward-driving lantern-wheel B can be brought into gear with one or other of the four concentric circles of roller-pin teeth on the large disk or wheel j, keyed to the secondary shaft g, and by sliding thc said tube d in the opposite direction on the rod c the reversing .lantern-wheel l) can be brought into gear with the outer circle of roller-pin teeth on the large disk oi' wheel f.

On a preferably square or angular portion of the second ary' shaft g is a sleeve or hollow shaft zf, having upon it a chain-wheel fi and brake-drum r. 'lhe chain-wheel "i is geared by means of a driving-chain Z (indicated in dotted lines in Figs. l and 2) to thc chainwheel fm, of the ordinary balance-gear on the back or driving axle 71y of the motor road-vehiclc.

The lantern-wheels B f), the teeth of which have the form of conical rollers, are at such a distance apart that in one position to which they can be brought by the turning of the hand or operating lever o neither of the said wheels B gears with the large rollercarrying pin-wheel f of the secondary shaft g, the inotor-car in this position of the parts of the gear being permitted to iun independently of the driving mechanism, or, as it is commonly called, with a free engine.H ln the positions of the parts of the gear represented in the drawings the driving mechanism is arranged for forward driving at its slowest speed, the wheel B for forward driving being in gear with the outer circle of roller-carrying pins of the wheel f. By bringing the pin-wheel B into gear with one or other of the inner circles of roller-carrying pins the speed of the large wheel f and its shaft g can be increased to the desired eX- tent. F or the reverse or backward driving of the vehicle the two connected gear-wheels B l) are moved in the direction of the dotted arrow in Fig. l until the wheel l) is brought into gear with the outer circle of roller-carrying pins of the wheelf.

On each operation of the mechanism for changing the speed or direction of motion of IOO the car the secondary shaft g is first moved endwise by the means hereinafter described, so as to take the large wheel f out of gear with the forward-driving wheel or pinion B or reversing wheel or pinion l).

I provide for giving motion to the tube -or sleeve d and wheels B b, connected thereto, the ordinary hand-lever o, with locking rod or bar p, working over the notched quadrant 7, and in addition thereto a foot-lever s. The tubular shaft or spindle t, to which the handlever o is keyed or fixed and which is partially rotated in one or other direction on the turning 4of the hand-lever 0, has near its middle a depending arm 14, the lower end of which is connected through the connectingrod 15 to the tube d. Also on the said shaft t is a second arm u, the outer'e'nd of which is of a quadrant form and carries a series yof equidistant or nearly-equidistant rollers or teeth o. y

With one or other (or one of the pairs) of rollers or teeth o a locking projection w on the nearly-horizontal arm Qc of the bellcrank lever y normally engages and renders irnlpossible the turning of the hand-lever o. The locking projectionw is partially withdrawn, as is represented in Fig. 4, so as to permit the movement of the operating-lever 0 by pressure of the foot on the foot-lever s, the said lever s being ,forcedv into the dotted position indicated in Fig. 1 for effecting the endwise movement of the secondary shaft g, hereinbefore referred to. The angular motion of the foot-lever s effects, through the connecting rod z and crank or arm 1, the partial rotation of the cross-shaft 2 and turning of the crank or Aarm 3, to the outer end of which is rconnected the spring-pressed lifting-rod 4 with toggle or link arrangement 5 at top. The f pair of links of the toggle arrangement 5 in the normal positions of the parts-occupy the position represented in full lines in Fig. 3, but on the raising of the lifting-rod 4 the links take the position indicated in dotted lines in the said Fig. 3, and thereby effect the endwise motion of the secondary shaft g.

Jointed to the crank-or arm 1 is a rod 6, supported at or about its middle by the rearwardly-inclined link depending from the frame of the car. rl`he front part of 'the rod 6 is of elastic steel and has near its extreme end a hook 8, (see Figs. 1 and 4,) with which engages the hooked end 9 ofthe arm y ofthe bell-crank lever x y. l/Vhenthe arm or crank 1 is turned by the pressure of the foot on the foot-lever s, the rod 6 is forced forward, and thereby effects the turning-of the bell-crank lever x y into the position represented in Fig. 4, which results in the freeing or unlocking of the operating hand-lever o. Inthis position of the parts the depending link 7 is practically vertical and exerts a downward force, tending to disengage the hooks 8 9. Consequently on the movement in one or other direction of the operating hand-lever the rollertooth n of the arm u in passing over the projectionweffects a movement of the bell-crank lever x y independent of the rod 6, the said bell-crank lever ly taking the position indicated in dotted lines in Fig. 4 and the springarm of the rod 6 dropping under the pressure of the depending link 7 until the hook 8 is clear of the hook 9. On the roller-tooth v passing the projection w the spring 10 causes the engagement lof the projection w with the space between lthe next pairof rol'lerift'eeth v.

In the way-described it will be understood that when the vehicle is in motion the speed can only be changed gradually, or by step-bys'tep increments ordecrements, vand `the accidents which frequently happen from time 'to time by a sudden and too excessivechange of speed are averted. To permit the gear 'to be changed when the'car 'is not in motion from any speed to which it may 'have been yset when the vehicle 'came 'to rest to 'a'ny -o't-her speed or to free engine, I provide a handlever 11, connecting-rod 12, and secondary lever 13, the latter being lso arranged that'one of its arms will effect 'the rturning of the `Ibellcrank lever x y when the lhandlever 11 Eis operated into its non-locking position.

The hand-lever 11 Vand `parts in'connecftion therewith are for the following purpose: Assuming that :the motor-'car has been brought to 'rest 'with Ithe driving-pinion B in gear with one of the innermost 'circles of roller-teeth on Athe disk f and 'it is desired to start the vehicle at the slowestspeed'orto reverse, it is only 'necessary to actua'fte the hand-lever 11 with one hand and to put tthe foot ofthe operator on 'the lever S, whenthe hand-lever o ycan be moved to fan'ydesired extent, the pinion B being'carried through several gears at-one operation.

Having now described'my invention, what I yclaim as new, and desire to secure by Let'- vters Patent, is-

1. A mechanism ofthe class described, consisting of a driving-shaft, pinions slidable in unison on said shaftand rotative withthe latter, a secondary slidable shaft, ad-iskc'arried by said shaft and fh'aving'a series fof-concentrically-arranged rollers thereon, means associated with the slidable shaft `and driven thereby to impart motion to 'a vehicle, means for shifting the pinio-ns to Ebring 'one o'f -ithe same in position for vengagement with 'the disk, and means for imparting sliding motion to the secondary shaft.

2. A 'mechanism of the-class described, consisting of a driving-shaft, gpinionsslida'ble in unison'on'said shaftand rotative with the rlatter, a secondary slidable shaft, fa diskcarried by said shaft and having a series offconcentrically-a-rrangedfjro'llers thereon, means associated 'with the `slidable shaft and driven thereby to impart lmotion toa vehicle, means for shifting the pinions to bring ione lof the TOO ISO

saine in position 'for engagement with the disk, means for imparting sliding motion to the secondary shaft, and means ilor locking the means 'for shifting the pinions against movement of the latter with respect to the disk.

3. In a mechanism of the class described,

a driving-shaft, a pair of lantern-Wheels retatable therewith and slidable longitudinally on said shaft, a shiftable secondary shaft, a disk having a series oi concentrically-arranged rollers thereon, said secondary shalt being at right angles to the driving-shaft, a driven Wheel associated with and actuated by said driving-shait for imparting motion to a vehicle, a foot-lever having connection with the secondary shaft, means having connection with the lantern-Wheels to move the same in unison, and means for locking and releasing the latter means.

4. In combination With a vehicle, a driving-shaft, a pair of lantern-wheels slidable longitudinally on. the shalt and rotatable with the same, each of said lantern-Wheels having connection and lbeing adapted to move in unison, a secondary shaft having a disk carried thereby, a series o'f rollers arranged in circles concentrically on said disk, a foot-lever associated with said secondary shaft for moving the same toward and from the driving-shaft, a lever having a segment provided with spaced rollers and having connection with the lantern-wheels, and a handoperable lever having means for engagement in the spaces between the Wheels carried by the segment to lock the Vfirst-mentioned lever against movement.

In testimony whereo'l I have hereunto set my hand in presence oi two subscribing Witnesses.

WALTER JOHN LLOYD. Witnesses:

RICHARD SKERRETT, WILLIAM JAMES BOWKER.

Images