US1614961A - Hot-air motor - Google Patents

Description

HOT AIR Mo'ron Filed Oct, 4. 1924 -iev l, -Jnsrap'rl 15 Patented Jan. 18, 1927.

UNITED STATES JOSEPH KOENIG, OF TWO EHVERS, VISCONSIN.

I-IOTwAIR MOTOR.

Application filed October 4, 1924. Serial No.. 741,634.

This invention relates to hot air motors and although it may be used for a variety of purposes, nevertheless is intended kprimarily as a! toy.

In heat engines it has beenthe usual practice to employ steam and an alcohol flame. This, as is well known, is a dangerous expedient and to provide a toy adapted for yuse for children, it is necessary to provide a simpler means for employing the heat for motive power.

Objects of this invention arel to provide a hot air motor which is extremely safe in its operation, which may be either driven by an electric heater or, if desired, from some other source of heat, which does not require any manipulation of valves o-r other adjustments, which is free from fragile parts, which employs no valves whatsoever in its construction, and which is of sturdy, rugged and simple design particularly adapting the device for use as a toy although, as stated, it may be used for other purposes.

An embodiment of the invention is shown in the accompanying drawings, in which Figure 1 is a side elevation of the device.

Figure 2 is a horizontal sectional view of the structure shown in Figure 1, the section omitting` the crank shaft, cranks and wheels.

The device comprises a working cylinder 1 in which a working piston 2 accurately lits. This piston is provided with inwardly directed lugs 3 which carry a. pin 4 connected to a pit-man 5, suitable spacing means being employed, as shown in the figure. This pitmanA connects with a crank pin 6 mounted upon a iy wheel 7, such fly wheel being in turn rigidly secured to a shaft 8. It is preferable to provide la pair of spaced supports 9 for this shaft such supports extending upwardly from the bed plate 10. rlhe other end of the shaft 8 is provided with a crank disk 11 which carries a crank pin 12.

A second relatively large cylinder 13 is provided and its rear end is connected by mea-ns of a conduit 14 with the rear end of the work cylinder 1. This relatively large cylinder has an inwardly projecting front end having an end wall 15 and a cylindrical wall 16 spaced, as shown, from the wall of the cylinder 13, as may be clearly seen from Figure 2 to provide a more extended heating surface. The portion of the cylinder 13 at the front end and for a material Vdistance rearwardly is provided with radiating tins or ribs 17 which keep this end of the cylinl integrally and 2 of the drawings) and is adapted to be connected to any suitable source of electric energy, for instance the lighting circuit. 1t will be seen that the rear end of the main cylinder 13 is the hot end thereof.

A piston rod 23 projects through the wall 15 and preferably through a stuiiing box 2li. The rear end of this piston rod slides within a small sleeve 25formed as a continuation of the wall 18. If desired, this sleeve may be provided with a rear end provided with a small aperture 26 to permit the escape of air,

confined between the end of the rod 23 and the vend of the sleeve 25, suitable grooves 27 being provided in the piston rod to prevent loss of gases from the main cylinder 13. This piston rod 23 is connected by means of a pitman 28 with the crank pin 12 and it will be noted that the crank pin 12 is set 90 from the crank pin 6. The piston rod 23 carries a heat insulating piston 29 which in turn carries a cylindrical member provided with forwardly and rearwardly eX- tending portions 3() and 31, respectively. These portions tit between the outer wall of the cylinder 13 and the inner walls 16 and 19, respectively, although they are free from contact with such walls, being bodily supported by the piston rod .3 which in turn is guided at each end, as stated. It is preferable to carry the cylinders 1 and 13 by means of o-ne or more supports 32 projecting upwardly from the base plate or bed plate 10.

Any suitable type of metal may be used in the construction of this device, for instance a cast aluminum member may be used for the cylinder 13 and flanges 17 may be formed therewith. Further the end members may be also of any suitable metal, aluminum lending itself very readily, however, to this construction due to its lightness, cheapness and great ability to radiate and conduct heat. .1t is, however, to be distinctly understood that other metals may be employed and that the mechanical construction, as illustrated in the drawings, may be changed without departing` from the spirit of this invention.

In opera-tion, assuming that the parts are in the positions shown in the drawings, and the working` piston 2 is traveling rearwardly, it will he seen that the air discharged from this cylinder will be shielded from contact with the heating;- memher 2O by means of the member 3l ot the inain piston, and that this air will he directed in a sheet towards the 'forward end ot the main cylinder, thus hecon'iingl chilled as it passes the cool sur- YFaces thereof and consequently contracting. However, upon 'further rotation, the main piston 29 moves 'iorwardiy and displaces the air from the forward end ot' the main cylinderl?, and causes such air to pass over the heating nnit 20 thus expanding the air. T he working` piston 2 is now in a position to move outwardly to accommodate this eX- panded air. This cycle of operation continues indefinitely as lonl as heat is supplied the rear end of the main cylinder.

It will be seen, therefore, that a very simple type of heating` invention has been provided which is free 'rom valves, delicate parts and mechanism, which is not likely to get out .of order, which is extremely simple in its construction and operation, and which may he cheaply manufactured.

Although the invention has been described in considerable detail, it is to be understood that the invention may he variously einbodied and is, therefore, to be limited only as claimed.

I claim:

A toy comprising a crank shaft having a pair o1 cranks thereon, .a flywheel carried by said shaft, a working,` piston connected to one of said cranks, a working cylinder enclosingl said piston, an air conditioning cylinder, a. detiector mounted therein and consisting oit a disc like member ot heat insulating` material and provided with a metallic cylindri al shell spaced .trom the inner wall of said air coinditioning cylinder, a piston rod carried by said delector, a link connectmg said piston rod and the other of said cranks, said air conditioning` cylinder having a recessed front end provided with means for conducting;` heat away from such end, said air conditioning cylinder having a recessed rear end spaced inwardly o't' said cylindrical shell and an electric heating element surrounding` such inwardly recessed rear end and mounted within the interior of said cylinder, said recessed ends formingsupports or said piston rod, and a pipe connecting said air conditioning cylinder with said working cylinder.

ln testimony that l claim the foregoing` I have hereunto set my hand at Two Rivers, in the county of Manitowoc and State of lVisconsin.

JOSEPH KOENIG.

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