DE93317C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention relates to an open one Hot air machine, in which the air in an invariable amount in one of the working cylinder separate device is heated.

The. Drawings illustrate the subject matter of the invention, and is

Fig. Ι a longitudinal section through the machine, Fig. 2 shows a basic outline,

Fig. 3 is a rear view;

Figures 4 and 5 are two side elevations and

Fig. 6 shows an embodiment of the heater. ....'- '■

The . The machine contains a cylinder AB with a differential piston C, which is arranged at the rear end of a guide piston D running in the narrow cylinder B.

The body D carries the pin E which receives the push rod F in order to transmit the movement of the piston to the shaft G.

The annular space A ¹ serves as a pump. It has two at its front end. Valves H and /. Valve H allows the air to be sucked in and into the annular space A ¹ ; it is operated by the rod H ¹ on which the thumb H ^ of the shaft G acts. The other valve I is automatic, and lifts when the air trapped in the annular space Α ^{Λ is} compressed by the piston C to a certain pressure, which z. B. is higher than two atmospheres. The valve / is connected to the heating coil J of the heating room.

The cylinder A carries two valves K and JL; the one valve K is an outlet valve and remains during the whole. When the piston C falls open, the other valve L is connected to the heating coil J and allows the heated compressed air to enter from the coil /. This valve remains open only during half the process of piston C; the air introduced during this time then expands in the cylinder until the moment when it is expelled through the valve K into the atmosphere.

The opening and closing of these valves is regulated by an eccentric M, which is keyed onto the shaft G. This eccentric divides a back and forth through the intermediary of the push rod iV of the rod O. Movement with, on the outer end of which the two stops P and Q are attached. These act alternately on the pawls R and 5, which sit on the shafts T and U. Each of the shafts U and T carries a second pawl Fund W, which at the rotary. movement the rod of the valve, which is located opposite, alternately push back.

As soon as the latch stops acting on the valve stem, the valve closes immediately under the action of his pen.

The heater can have any suitable device; as shown in Fig. 6, it may consist of a heating coil J which is mounted inside any cooker Y or any other device of the same nature.

This hot air machine works as follows:

It is assumed that the piston is at one end of the stroke and its Decline begins. The posterior part of the

Piston C will drive the expanded air, which has given up its heat and work power, out of space A ^{2 in} front of it and expel it through valve K , which during the entire time the piston is retreating as a result of the encounter of the stop P and the pawl R. remains open.

At the same time the front part of the piston with a smaller surface sucks the annular space A ^{1 of} the cylinder full of air. from the atmosphere, since ..valve H remains open during the entire decrease.

When the piston has reached the end of the stroke, the outlet valve K closes, because at this moment the stop P, which is guided forward by the eccentric M, moves the pawl R , but the second stop Q. meets itself the latch S and causes the opening of the valve L and consequently the entry of the heated compressed air from the coil / into the space A ² . The piston C then goes back forwards and transmits its force to the shaft G by means of the push rod F.

As soon as the piston goes back to the front, it leaves. Thumb H ² the rod H '; the suction valve H closes immediately and the air is then compressed in the annular space A ^1.

When the piston is in the middle of its stroke, the stop Q, which has been brought back to the rear by the eccentric M, leaves the pawl S, and the valve L for the entry of the hot compressed air falls back onto its seat and thus lifts the Connection between the queue / and room A ² .

At this point the pressure in annulus A ^{1 is} high enough to lift valve / and this pressurized air is then admitted into coil J.

The air trapped in space Ä ² expands and piston C continues its forward motion. As soon as it has reached the end of the stroke, the valve J closes and removes any connection between the annulus A ¹ and the snake /; the piston then goes backwards and causes the escape of the air which has acted and the suction of a new charge into the annular space A ¹ .

For the entire duration of the piston in reverse, and that is what it consists of Peculiar to the invention, the compressed air remains trapped in the queue, without connection to have with the cylinder, neither with the front part, which acts as a pump serves, still with the rear part, which is used for work.

Claims (1)

Patent claim: Open hot air machine, characterized in that the compressed air heated in a heater in a constant volume is fed through a controlled valve into the working cylinder (A ² ) . and moves the piston up to half of the stroke, during which time the air sucked in at the previous exhaust stroke in the front annular space (A ¹ J of the differential piston is compressed here, until the completion of the supply path of the hot air to the working space and during the expansion effect that now follows the compression becomes so strong that the inlet to the boiler room is opened and the compressed air passes into it, in order to remain exposed to the heating during the following full return stroke (suction and exhaust stroke) of the piston after the connection paths have been completed. For this purpose 2 sheets of drawings.