US1370742A - Toy-aeroplane-motor winder - Google Patents

Description

C. H. GRANT AND C. B. WERTZ.

TOY AEROPLANE MOTOR WINDER APPLICATION FILED SEPT. 29, 1919.

Patented Mar. 8, 1921.

Fig. 2

WITNESSES: M rfi' Hymn/ UNITED STATES PATENT OFFICE.

CHARLES H. GRAN T AN D CHARLES B. WERTZ, OF DAYTON, OHIO.

TOY-AEROPLANE-MOTOR WINIDER.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed September 29, 1919. Serial No. 327,013.

To aZZ whom it may concern:

Be it known that we, CHARLES 'H. GRANT and CHARLES B. WVERTZ, citizens of the United States, residing in the city of Dayton, county of Montgomery,- and State of Ohio, have invented certain new and useful Improvements in Toy Aeroplane Motor Winders, of which the following is a specification.

The principal object of our invention is to provide a simple and eflicient winder for the motors of toy-aeroplanes. These motors usually consist of singleor double strands of rubber which must be'wound tight togive the best results. Only with a winder of our design can the proper and equal tension in double motors, such as we employ, be obtained. Accordingly, the veriest amateur,

by the use of our winder, can quickly wind both propellers at the same time, with no danger of the winder failing to operate after the strands have been placed under a certain tension, as in the case of many improvised winders.

The preferred form of embodiment of our invention is illustrated in the accompanying drawings, of which Figure 1 is a perspective view of our motor winder, and F ig. 2 is a side elevational view thereof, partly in section.

Throughout the specification and drawings, simllar reference characters denote corresponding parts.

In a detailed description of the preferred form of embodiment of our invention, the numeral 1 designates a piece of sheet metal whose lower end is bent in the form of a loop riveted at its upper portion, to provide a handle 2. Above its handle portion, the metal piece 1 is bent outwardly and then upwardly to provide a vertical portion which tightly receives in a hole therein, a bolt 3 whose head has a preferably reduced inner portion a which forms a spindle fora disk 5, the inner end of the bolt receiving a nut 6.

A short distance above the bolt 3, the metal piece 1 terminates in a horizontal U shaped portion 7 whose free end projects over the top of the disk 5, with a down wardly curved flanged portion 8 for a purpose to be hereinafter described.

In the top portion of the U shaped portion 7 of the metal piece 1 are provided two holes spaced a short distance apart to receive two short winding arbors 9, 9 whose lower ends are tapered for support in tapering holes provided in the lower arm portion of the U shaped portion 7 of the piece 1. At its upper end each arbor 9 terminates in a hook 10 adapted to receive the strands of rubber comprising one of the toy-aeroplane motors.

The arbors 9, 9 are turned by the following means, quickly to place the rubber strands comprising both motors, under equal and suflicient tension to propel the plane. Riveted to that portion of each arbor 9 which is between the horizontal arms of the U shaped portion 7 of the metal piece 1, is the neck portion 11 of a gear 12. The gears 12 are in mesh, so that when one is turned, the other will be rotated by it.

The teeth of the gear 12 nearest the disk 5, enter apertures 13' which preferably have the form of radial slots provided around the disk 5 near its marginal edge; The flange 8 on the outer end of the metal piece 1, serves to limit the outward movement of the disk 5 beyond a point where the apertures in the disk would passthe teeth in the gear without engaging them. Therefore, the disk and gear nearest it, will always be in engagement no matter how strong the tension may be come in the rubber strands. In many improvised motor winders, when the tension of the strands reaches a certain point, which is short of that required to efiiciently operate the plane,.the gears of the winder will slip out of mesh, rendering the winder inefiicient for proper service. In our winder, the gear and disk will always remain in engagementduring the winding operation.

Riveted to the face of the disk 5, between the circumferential row of apertures 13 and the bolt 3, is a crank 14 by means of which the disk may be turned with no great effort to make the turning ratio between the arbors and disk a little over four to one. Accordingly, the rubber strands may be wound quickly by the arbors 9, 9, and since they turn in the same ratio, an equal tension will be placed upon the double motors to make the flight of the aeroplane a perfect one.

If desired, the device may be equipped with just one arbor, for winding a single motor, without departing from the spirit of the invention. Other changes and modifications may be made in the device within the scope of the subjoined claims.

Having described our invention, we claim:

1. In a device of the type described, the combination with a handle piece, of an apertured disk pivotally secured to the upper portion of said handle piece, a crank for turning said disk, a bearingportion formed on the top of said handle piece, a windlng arbor supported in said bearing portion, a

gear on said arbor adapted to be turned by the apertured disk, and a' flange terminal on the upper portion of said handle piece for preventing said gear from slipping out of mesh with said disk, for the purpose specified. v

2. In a device of the ty e described, the

combination with a hand e piece, of an apertured disk pivotally secured to the upper portion of said handle piece, a crank for turning said disk, a horizontal U shaped bearing support on the upper end of said a handle piece, a winding arbor vertically dis- .an outwardly and'upwardly extending portion of said piece of metal above the handle part, an apertured disk pivotally secured to the upwardly extending portion of said metal piece, a horizontal U-shaped bearing portion integral with the upwardly extending part of said metal piece and provided with holes, a pair of arbors projecting downwardly through the holes in the top arm of said U-shaped portion, into the holes in the bottom arm of 7 said U-shaped 7 member, a hook on-the upper end of each arbor, its bottom end being tapered to rest in one of the last mentioned holes, a gear :East on each arbor within the U-shaped inclosure, said gears meshing with each other, while the outer one is engaged by the apertured disk, a crank for turning said disk, and a flange on the outer end of said U-shaped portion, engaging the outer face of said disk to hold it in engagement with the gear nearest it, for the purpose specified.

In witness whereof we have hereunto set our hands this 26th day of September, 1919.

CHARLES H. GRANT. CHARLES B. WERTZ.

Witness: HOWARD S. SMITH.

Images