US730678A - Friction-gearing. - Google Patents

Description

-No."'730,678. I PATENTED JUNE 9, 19os.'

L. MAURER. FRICTION GEARING.

APPLICATION FILED MAY 16, 1902.

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UNITED STATES Patented June 9, 1903.

PATENT OFFICE.

LUDWIG MAURER, OF NUREMBERG, GERMANY, ASSIGrNOR TO NURNBERGER MOTORFAHRZENGE FABRIK UNION, G. M. B. I-I., OF NUREMBERG, BA-

VARIA, GERMANY.

FRICTION-GEARING.

SPECIFICATION forming part of Letters Patent No. 730,678, dated June 9, 1903. Application filed May 15, 1902. Serial No. 107,446 (No model.)

To all whom/it may concern.-

. Be it known that I, LUDWIGMAURER, asubject of the Emperor of Germany, and aresident of Nuremberg, Bavaria, Germany, have invented certain new and useful Improvements in Friction-Gearing, of which the following is a specification.

A double fiat-disk friction-wheel gearing in which two friction-wheels are compressed between two opposed friction-disks is already known. The double fiat-disk friction-wheel gearing which forms the object of the present invention has, however, many advantages over those already known.

In the improved double flat-disk frictionwheel gearing which forms the object of the present application only one of the fiat disks is driven from the motor, and the change of gear is efiected by the displacement of only one of the friction-wheels,whereby the whole gearing is considerably simplified and the force necessary for adjusting the frictionwheel is rendered comparatively light in spite of the double driving of the latter. lowing arrangement, one form of construction of which is shown in the accompanying drawing, is adopted for obtaining this action.

In the drawing the figure is asectional plan view.

A fiat disk b is fixed on the inner end of a motor crank-shaft a. In front of this disk and parallel to it a shaft d is mounted on the carframe a, which shaft is to be driven with a variable speed and on which shaft a frictionwheelfis longitudinally adjustably mounted by means of a key engaging in a groove 6. On the same shaft a friction-wheel h is revolubly mounted between set rings or collars g, which wheel, like the friction-wheel f, is in contact with the flat disk b. On the other side of the shaft (1 a second flat disk 2 is revolubly mounted opposite the first-named flat disk b and bearing with its friction-surface also on the peripheries of the friction-wheels f and it. While the friction-wheel is, as already stated, axially adjustable between the two fiat disks Z) and o, the friction-Wheel h, which is immovably mounted and faces the The fol friction-wheel), is always at the outer end of the flat disks.

The rotation imparted by the motor to the flat disk 71' is transmitted directly to the adjustable friction-wheel f and also, by means of the non-adjustable friction-wheel h, to the flat disk 1;, which imparts this rotation also to the friction-wheel f. As both flat disks 1) and 'i always rotate at a similar speed, but in opposite directions, the adjustable frictionwheel f, clamped between the two disks, is driven at two diametrically opposite points uniformly and in similar directions of rotation, so that also even in the case of low gears-that is, to say, when the friction-wheel f approaches the center of the flat disks-the transmission of movement to the shaft (1 to be driven takes place with certainty. According to the position of the friction-wheel f between the disks the shaft 61 transmits the motion of the motor-shaft aby means of chainwheel gear is or the like with a greater or smaller speed of transmission to the drivingaxle of the vehicle.

The two fiat disks 1) and i may be pressed against the friction-wheels f and h from the drivers seat by pulling a rod Z, which acts by means of link-bars m and n on the one hand on the end of a lever 0 and on the other hand on the end of a lever 19. The lever 0 engages with a collar or the like on the motor-shaft a, and the double lever 19 similarly acts upon the rotary axle q of the disk i in such a Way that when the rod Z is drawn back the shaft a and the axle q are pushed inward, and consequently the fiat disks 1) and i are pressed against the peripheries of the friction-wheels f and it, while when the pull on the rod-Z ceases the pressure ceases, and thus the transmission of movement is interrupted.

The axial displacement of the frictionwheel f may also be effected by means of an arm .9 pivotally engaging the hub r of the friction-wheel, which arm .9 is firmly connected with a screw-spindle t. On this screwspindle a nut to is seated, which is revolubly mounted on the car-frame c, and which nut may be rotated from the drivers seat-for second wheel splined on said shaft and hav"- ing its periphery in contact with the faces of both said disks, and means for moving said second wheel on the shaft and means for moving the disks into and out of contact with the wheels, substantially as described.

In witness whereof I have hereunto set my 20 hand in presence of two witnesses.

LUDVVIG MAURER.

Witnesses:

ANDREAS STIOH, OSCAR BOOK.

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