US1155368A - Reversible variable-speed drive. - Google Patents

Description

R. B. OMAN. REVERSIBLE VARIABLE SPEED DRIVE.

,APPLICATION FILED IAN. II. I913. 1,155,368. Patented Oct. 5,1915.

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R. B. OMAN.

REVERSIBLE VARIABLE SPEED DRIVE.

APPLICATION FILED JAN- II. I913.

Patented Oct. 5, 1915.

2 SHEETSSHEET 2.

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REUBEN B. OMAN, or WILLMAR, MINNESOTA.

REVERSIBLE VARIABLE-SPEED DRIVE.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Application filed January 11, 1913. Serial No. 741,481.

To all whom it may concern:

Be it known that I, REUBEN B. OMAN, a citizen of the United States, residing at Villmar, in the county of Kandiyolii and State of Minnesota, have invented certain new and useful Improvements in Reversible Variable-Speed Drives; and I do hereby declare the following 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.

My invention has for its object to provide an extremely simple and highly efficient reversible variable speed drive; and to such ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claim.

A reversible variable speed drive of the character disclosed and claimed in this application is especially adaptedfor use in connection with automobiles or motor propelled vehicles, but may be found serviceable for other uses. 8

In the accompanying drawings which illustrate one embodiment of the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view of the transmission mechanism; Fig. 2 is a side elevation of the parts shown in Fig. 1, with some portions broken away;

Fig. 3 is a transverse section taken approximately on the line :0 03 on Fig. 1; and Flg. 1 p

is a plan view with some parts sectioned and some parts broken away, the said view being supplemental to Fig. 1.

The numeral 1 indicates a rectangular framework having a depending yoke 2. This framework is adapted to be suitably secured to the chassis of an automobile. The numeral 3 indicates a transverse shaft suitably journaled in the framework 1 and adapted to be connected either directly or indirectly to the traction Wheels of the automobile. Said shaft 3 carries a pair of laterally spaced thin metal disks 4: that are rigidly secured thereto.

The numerals 5, 6 and 7 indicate three shafts, which, at their outer or front ends are journaled in bearing blocks 8 pivotally connected to the front end portion of the frame 1. The inner or rear ends of these shafts 5, 6 and 7 are journaled in the inter mediate portions of presser bars 9, 10 and 11, respectively, the lower ends of which said bell crank lever 13. The three shafts 5, 6 and 7 are provided with intermeshing gears 17 of the same diameter, and which are preferably keyed thereto, close to the front bar of the frame 1, and hence, as close as practicable to the axes of the pivotal connections between the bearing blocks 8 of the said frame 1.

The center shaft 5, which is the driving member, is, asshown, connected to the engine crank shaft 18, by a jointed shaft 19 having knuckles 20. y

' Keyed for rotation with the shafts 5, (3 and 7, but free for sliding movements thereon, are sleeves 21, 22 and 23, the rear ends of which are provided with small friction wheels 2%, preferably having wood fiber or other suitable frictional facings for direct engagement with the disks l. The said disks 4, it will be noted, particularly by reference to l ig. 1, are interposed between the said friction wheels 24. The sleeve 21 is provided with a grooved collar 25 that embraces simplecollars 26 on the sleeves 22 and 23. In "this way, the sleeves 21, 22 and 23 are connected for common sliding movements on the respective shafts in a direction radially toward and from the aXis of the disk shaft 3.

The sliding movement of the said collars and friction wheels is adapted to be controlled by a shipper lever 27 pivoted at one end to one side of the frame 1 and provided with a stud or projection 28 (see Fig. 3) that works in the annular groove of the collar 25.

As is evident, the shafts 6 and 7 will, through the gears 8, be caused to rotate both in the same direction, but in a direction re verse to the direction of rotation of the driving shaft 5. The central friction wheel 24 is adapted to be engaged with either of the disks 1, and one or the other of the outer friction wheels 24: will always cooperate therewith to tightly grip one or the other of the driven friction disks or wheels 1 be tween them. To illustrate, and directing attention to Fig. 3, let it be assumed that the shafts 5, 6 and 7 are constantly driven in p the direction of the arrows marked thereon.

cause the automobile to move ahead or forward. When, however, the free end of the lever 13 is presseddo-wnward, the friction wheels 24 of the sleeves 21 and 23 will be caused to frictionally press the other disk 4, and the counter shaft 3 will then be driven in a direction reversefrom that indicated in Fig. 2 or in a direction to cause the automobile to move backward. This highly important feature should be noted, to-wit, that in this transmitting action, there is no lateral thrust, whatever, put upon the disks 4 and consequently, no endwise thrust put upon the shaft 3. In all of the driving actions, one or the other of the disks 4 are simply frictionally clamped with a vise-like action between a pair of cooperating rotating'friction wheels, hubs or rollers. Otherwise stated, the clamping pressure on the disk is in all cases neutralized. V The very slight lateral movements of the friction wheels 24 toward and from each other does not materially move the gears 17 in respect 7 to .each other.

' The reversing action has now been made clear, and it will, of course, be understood that the variable speed is controlled by movements of the friction wheels 24 toward and from the axis of the shaft 8. With the Copies of this patent may be obtained for shaft 5 acting as a driving member, and the shaft 4 as the driven member, relatively greater power and slower speed is attained when the wheels 24 are moved outward toward the peripheries of the disk 4, and conversely, greater speed and less power is obtained when the said wheels 24 are moved inward toward the aXis of said driven shaft 3.

This driving transmission mechanism,

' while very simple and of small cost, is very noiseless in action, strong, durable and generally efficient for the purposes had in view.

hat I claim is:

In a transmission mechanism, the combination with a shaft having twolaterally spaced disks, of three shafts geared together and provided with friction wheels slidable thereon. but rotatable therewith, the said disks being interposed between said wheels, connections applied to said shafts for imparting angular movement thereto to cause the intermediate friction wheel and one or the other of the outer friction wheels to clamp one orothe other of said disks between them, according to the direction of rotation desired, a grooved collar on said intermediate friction wheel, single collars on the other two of said wheels working in said grooved collar, said collars connecting said friction wheels for a simultaneous sliding movement ontheir respective shafts, and a shipper lever having a stud working in said grooved collar.

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

' REUBEN B. OMAN.

Witnesses N. S. SW'ENSON, EDWIN SELvIG,

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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