US2795894A

US2795894A - Double propeller wind driven spark producer

Info

Publication number: US2795894A
Application number: US184238A
Authority: US
Inventors: Thomas E Hughes
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-09-11
Filing date: 1950-09-11
Publication date: 1957-06-18
Anticipated expiration: 1974-06-18

Description

June 18, 1957 T. E. HUGHES 2,795,894

DOUBLE PROPELLER WIND DRIVEN SPARK PRODUCER Filed Sept. 11, 1950 mvsmom:

United States Patent DOUBLE PROPELLER WIND DRIVEN SPARK PRODUCER Thomas E. Hughes, Miami, Fla.

Application September 11, 1950, Serial No. 184,238

3 Claims. (Cl. 46-48) The present invention relates to an improvement in double propeller Wind driven spark producers, reference being made to application for Letters Patent filed in the United States Patent Oflice by this inventor, Thomas E. Hughes, dated August 16, 1950, Serial No. 179,699, but which has since been abandoned.

The main object and purpose of this invention in double propeller wind driven spark producer is to provide a toy and an attachment for toys which is suitable for use at night.

One advantage found in this new invention is the simplicity of construction. it is composed of four simple parts, and may be assembled by a child. There are many possible uses for it such as attached to a rubber ball as shown in Figure 2 and as a propeller for a toy airplane. The turning of the propellers of this new invention causes sparks to be made, and the flight of a toy airplane equipped with this new invention may be followed by sight even at night. This will also hold true if this new invention is attached to a kite. When attached to a kite that is flown at night it gives the appearance of a shooting star. On a two stick kite one or three of these double propeller wind driven spark producers may be used, while on a three stick kite four or two may be used.

This new invention may be installed on almost every type of motor driven toy. It may be attached to toy boats, toy automobiles, and may even be attached to bicycles and motorcycles where it will provide an additional safety feature when used at night.

The sparks which are created by the movement of the propellers of this new invention may be viewed from a distance of approximately one-quarter mile. If the propellers are translucent or transparent and are made of colors the sparks created behind the propellers will assume the color of the propellers. Therefore if the propellers are red the sparks will appear red when viewed from the front. Wind will not blow the sparks out and tests have proven the flints will last approximately fortyfive minutes When used constantly. Thus, this invention may also be used for a signalling device.

An even further use for this new invention is found in its attachment to a stick, rod or ball. By whipping the stick, rod or ball through the air sparks are caused to fly from the invention with each whipping action.

Apart from its attractiveness, one of the most important features of this new invention is the safety of its use. Although the rotation of the propellers cause sparks to fly there are no harmful efiects. Many tests have been made on toy airplanes, sticks, kites, balls, and other toys and it has been found to be safe in every respect.

With these and other advantages to be pointed out as we proceed I refer to the drawing in which like parts are denoted by the same reference characters throughout the several views, wherein:

Figure 1 is a side elevational view of the double propeller wind driven spark producer.

Figure 2 is an end elevational view of same, shown as being attached to a rubber ball.

Referring more particularly to the figures:

19 represents the pin shaft upon which all the other parts are assembled. As shown in the drawing, the propeller 35 and the propeller rotate opposite one to the other, said opposite rotation of the propellers being due to the opposite pitch thereof. Either propeller may be the counter-rotating one, but to simplify the explanation, propeller 15, as viewed from the bottom of Figure l, rotates counter-clockwise while propeller 35 rotates clockwlse.

At point 36 the emery disc pad 17 is glued, or other- W186 attached to the propeller 35. A flint holder 16, having flints 21 and prongs 20 attached thereto, is placed on the pin 19 to allow the flints 21 to be in a position to contact the flint pad 17, while the propeller 15 is placed on the pin 19 between the prongs 20. The assembly of the parts on the pin 19 is as follows: First the propeller 35 is placed on the pin 19 adjacent the head 22, which prevents its removal thereof, then the flint holder is placed, and lastly the propeller 15. The prongs 20 are for the purpose of causing the flints 21 to rotate opposite in direction to the emery pad 17 thus causing a double movement of the flints 21 against the emery pad 17. The additional friction supplied by the rotation of the propellers in opposite directions greatly increases the efliciency of the invention and creates more sparks.

The rubber ball 37, shown in Figure 2, is provided with a string 38 which allows the ball to be swung in a circle or in other ways, if desired. This embodiment of the invention is shown as being attached by pressing the point of the pin 19 into the ball.

By making the pin shaft 19 longer, more than one of these double propeller wind driven spark producers may be placed on the one pin shaft, with a resulting increase ,in the spark display.

What I claim is:

1. A wind driven spark producer having a pin shaft; two propellers, said two propellers constructed to rotate in a direction opposite one to the other; an emery pad attached to one of the said propellers; a U-shaped flint holder; flints attached to one side of the said flint holder; prongs attached to the opposite side of the said flint holder, said prongs fitting one on each side of the other of said propellers; and said propellers, emery pad, and flint holder having means receiving the pin shaft therethrough.

2. In a wind driven spark producer, the pin shaft, one clockwise rotating propeller; one counter-clockwise rotating propeller; an emery pad attached to the clockwise rotating propeller; a flint holder; flints attached to the flint holder; prongs attached to the flint holder on the side opposite to the flints there being one prong on each side of the counterclockwise rotating propeller; means provided in the propellers, the emery pad, and the flint holder receiving the pin shaft therethrough.

3. In a wind driven spark producer, a pin shaft; one end of said pin shaft having a point, the other end of said pin shaft having a flange; a clockwise rotating propeller mounted on the pin shaft adjacent the flange; an emery pad glued to the center part of the clockwise rotating propeller on the side facing the pointed end of the said pin shaft; a flint holder mounted on the said pin shaft adjacent the said emery pad, flints attached to the side of the said flint holder adjacent the said emery pad, prongs attached to the said flint holder on the side opposite said flints, and a counterclockwise rotating propeller mounted on the said pin shaft between the said prongs.

References Cited in the file of this patent UNITED STATES PATENTS 1,481,826 Brown Ian. 29, 1924 1,554,065 Blair Sept. 15, 1925 1,619,689 Aronson Mar. 1, 1927 2,035,629 Wing Mar. 31, 1936 FOREIGN PATENTS 469,266 Germany Dec. 11, 1928