US140690A - Improvement in gearings - Google Patents

Description

UNITED STATES PATENT OFFICE.

FRANK EMMERIGH, OF NEW YORK, N. Y.

IMPROVEMENT IN GEARINGS.

Specification forming part of Letters Patent No. 140,690, dated July 8, 1873; application filed June 5, 1873.

vTo alt whom it may concern:

Beit known that I, FRANK EMMERICH, of the city, county and State of New York, have invented an Improvement in Gearing, of which the following is a specification:

Figure 1 is a face view, partly in section, of my improved gearing. Fig. 2 is an edge view of the same.

Similar letters of reference indicate corresponding parts.

The object of this invention is to produce a new gearing, by which a continuous bearing of the teeth of one wheel upon those of the other can be obtained, and all back-lash or loss ot' motion during reversing avoided.

This invention consists in making each Wheel of two or more toothed disks, whose teeth are constructed on the same pitch-1ine, but with ditlerent pitches, so that where two or more such disks of two gear-wheels mesh into each other, not only the continuous bearing is obtained, but also all loss of motion or back-lash during reversion avoided. In fact,

` under this construction, two disks for each wheel will be fully as effective as three or more when constructed on the principles of ordinary step-gearin g.

In the accompanying drawing, the letter A represents one and B the other of two shafts to be connected by gearing. Upon the shaft A is mounted the gear-wheel C, and upon the shaft B the pinion or gear-wheel D. The

wheel C is composed of two toothed disks or gear-wheels, a and b, and the wheel or pinion D of two toothed disks or gear-wheels d and e, as shown in Fig 2, the said disks being s0 placed that a gears into d and b into e. The pitch-lines of the wheels a b are alike, as are also those of d c, but the pitches of the teeth a b vary, and so do those of the wheels d e. This makes the teeth of a differ in size and number from those formed on the wheel b, and consequently also an equal variation exists between the teeth of d and e. The varying size, thickness, and number of teeth produces such a disposal of contact surfaces that continuous bearings will be obtained when these wheels are in gear, and all back-lash prevented, as aforementioned. The disks a and b may be connected by a set-screw, f, passing through a slot of one of the disks, so that they may be properly adjusted with reference to the disposal of their teeth whenever necessary.

I claim as my invention, and desire to secure by Letters Patent- The gear-wheels C D, constructed each of two or more toothed disks, the teeth of each pair being formed on the same pitch-line, but

with different pitches, substantially as described.

FRANK EMMERICH. Witnesses:

FRED. HAYNEs,

MICHAEL RYAN`

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