US1391343A - pttlliam - Google Patents

Description

Patented Sept. 20, 1921.-

W/T @M A TTORNEYS UNITED STATES OSWALD S. PULLIAM, OF NEW YORK, N. Y.

TRANSMISSION.

Specification of Letters Patent.

Patented Sept. 20, 1921.

Application filed. July 28, 1919. Serial No. 313,766.

To all whom it may concern:

Be it known that I, OSWALD S. PULLIAM, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Transmission, of which the following is a full, clear, and exact description.

This invention relates to new and useful improvements in power transmission mech anism, and it pertains more particularly to a driving mechanism for vehicles of the self propelled type.

It is the primary object of the invention to provide a driving mechanism for motor vehicles in which various speeds may be obtained without the use of the transmission mechanism commonly employed.

It is a further object of the invention to provide means for supporting the propeller shaft in such a manner as to permit of the foregoing operations. 7

Referring to the drawings in which like characters of reference indicate corresponding parts in all the figures,

Figure 1 is a side elevation partly in section of the rear portion of a motor vehicle showing one form of the present invention;

Fig. 2 is a fragmentary top plan view thereof;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a horizontal sectional view taken on the line H of Fig. 3.

Referring more particularly to the drawings, the reference character 5 designates one of the side frames of a motor vehicle chassis; 6 one of the rear wheels, and 7 the rear axle.

In the present form of the invention, the side frames 5 of the chassis are connected by means of angle irons 8, and supported by said angle irons 8, is a plate 9, which is provided with a slot 10, the specific construction and utility of which will be hereinafter referred to.

The reference character 11 designates the propeller shaft leading rearwardly of the machine from its motor and the rear end of said propeller shaft is squared as designated by the reference character 12. The squared end 12 of the propeller shaft 11 is connected to the rear end of the propeller shaft 11 by means of a universal joint 12. The reference character 13 designates a connecting shaft, which shaft has its forward end 14: socketed as at 15, said socket being rectangular in cross sectional form and adapted to receive the squared end 12 of the shaft 11. Secured to the socket 15, as at 16, is a shiftlng lever 17, and said shifting lever projects upwardly through the slot 10 of the plate 9 and is provided on its upper end with an operating knob or handle 18. The lever'17 is pivotally connected as at 16, to a ring 16, which surrounds the socketed end 15 to pen mit of rotation of said socketed end relative to the lever 17. Mounted on opposite sides of the ring 16 are collars 17, which are immovably carried by said socketed end and which prevent movement of the ring 16 longitudinally of said socketed end 15.

Suitably supportedby means of resilient members 19, swung in shackles 20 carried by the side frames 5 of the chassis, is a bracket 21, said bracket being secured to the resilient members 19 by means of clips or the like 22. This bracket 21 has an enlarged lower end 23, which is provided with an elongated slot 2d, and in its bottom wall, said slot 24 is pro vided with a groove 25.

The shaft 13 is adapted to project through the enlarged portion 23 of the bracket 21, and said shaft is rotatably mounted within a block 13, which block is adapted to slide transversely of the enlarged portion 23 of said bracket. This block 13' is provided with a pin 26, which is adapted to engage in the groove 25 in a manner to be hereinafter more specifically described.

Carried by the rear axle 7 is a gear wheel 27, and said gear wheel 27 is provided on the opposite sides of its peripheral edge with teeth 28 and 29.

Carried by the rear end of the connecting shaft 13 is a plurality of gear wheels 30, 31 and 32, said gear wheels being adaptedto engage the gear teeth 28 of the gear wheel 27 to drive the same at different speeds.

The operation of the device is as follows:

With the several parts in the position shown in Figs. 1 and 2, it will be apparent that the rear axle will be driven at its lowest speed, owing to the fact that the smallest gear wheel 30 is in mesh with the teeth 28 of the gear wheel 27. When it is desired to increase the speed of rotation of the axle 7, the gear wheel 31 is engaged with the teeth 28 of the gear wheel 27 in the following manner: The slot 10 in the plate 9 is provided with a straight portion 30*, which terminates in a step 31 which in turn terminates in a straight portion 32, said straight portion 32 terminating in a step 33, which latter terminates in a straight portion 34:. On the opposite end of the straight portion the slot is provided with a step which terminates in a straight portion 36, which lies parallel to the straight portion 30.

By reference to Fig. 4, it will be seen that the slot 25 in the enlarged portion 23 of the bracket 21, is formed with a straight portion 30, a step 31, a straight portion 32, a step 33, and a straight portion 34, all'of which communicate-in the same manner as their relative parts 'in'the slot 10 of the plate 9. The opposite end of the straight portion 30 terminates in a step portion 35, and said step portion 35 terminates in astraight portion 36.

By this construction it will be seen that as the operating lever 17 is moved through the various angular portions of theslot 10, the pin 26 of the block 13 will be moved through the corresponding annular portions of the groove 25 in the enlarged head 23 of the bracket 21. v

Vith the parts in the'pos'i'tion shown in Figs; land "2, when it is desired to increase thespeed of the driving axle 7, the operating lever '17 is moved into thestep portion 31 of the'slot 10 and through the action of the pin 26 carried by the block 13, 'the'shaft 13 is moved both transversely and longitudinally of the chassis to permit of engagement of the gear wheel 31 with the teeth 28 of the gear wheel 27.

If it isdesired to still further-increase the speed 'ofrotation'of the axle 7 the operating lever '17 is moved through thestep portion 34: and this action through the engagement of the pin 26 of the step portion 31 and straight portion 3 1 of the groove 25,"causes the larger gear wheel 32 to engage the teeth 28 of the gear 27, the said shaft 13 moving longitudinally and transverselyofthe chassis to permit of thisoperation taking place.

When it is desired to reverse the rotation of the axle 7, the operating lever 17 is brought backwardly through the slot 10 in the plate 9, until it is in the step portion 35 thereof. With the lever in this position, the gear wheel 30 will be out of engagement with the teeth 28 of the gear wheel 27, and the shaft 13 will be free to move transversely of the chassis in order that when the lever 17 is moved through the step portion 35 and into the straight portion '36of said slot, the gear wheel 30 will engage the teeth 29 on the opposite side of the gear wheel 27 to give the reverse direction of rotation thereto.

Claims: Y

1. A driving member, a driven member, a shaft connecting the driving member with the driven member, aplurality of gears carried by the shaft and adapted to individually engage the driven member, means for moving the shaft longitu'dinally'to cause individual engagement of said gears, and means for moving the shaft transversely to 'perinit'of one of the gears carried by said shaft engaging the driven member'up'on its opposite side to reverse the direction of travel thereof.

2. Adriving -member,'a driven member, a shaft 'connectingthe' driving member with the driven member, a pluralityof gears carried by said shaft and adapted to individually engagethe driven member to vary the speed thereof, means for permitting longitudinal movement of said shaft to cause individual engagement of said gears with the driven member, means providing lateral movement of said shaft to permit of one of said gears being moved to the opposite side of said driven member to drive the same in reverse direction, and meahs for o crating said shaft longitudinally and trans= versely.

OSWALD S. PULLIAM.

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