Patent GB-424546-A (GB)
Title: Improvements in or relating to fluid-reaction propelling apparatus
IPC: F02K5/00
Filed: 1934-08-15
Abstract: 424,546. Fluid-jet reaction apparatus. ENDRES, H., 116, Kullerstrasse, Solingen, Germany. Aug. 15, 1934, Nos. 23562, 23563, and 23564. Convention dates, Aug. 15, 1933, Nov. 9, 1933, and April 3, 1934. [Classes 4 and 114] Applicable for propelling aircraft, ships, and motor vehicles and for power generating plant generally and comprises apparatus in which a stream of pressure fluid is discharged from a jet and into the atmosphere through the outlet of a nozzle, arranged co - axially to the jet, so that a partial vacuum is produced in the nozzle which vacuum aids the production of a stream from the jet. As shown in Fig. 1 a jet 13 is arranged at the end of a cylinder 3 and coaxially therewith are a series of nozzles 2, 26 .. 29 so arranged that the areas of their outlets and of the annular spaces between the nozzles are greater towards the outermost nozzle. The nozzles are secured to a casing 1 mounted in the cylinder 3. Within the cylinder 3 is a piston 18 dividing the cylinder into a compression and a suction chamber and the piston is pressed forward normally by a spring 22. Ports 20 in the piston coincide with a groove 8 in the cylinder with which grooves the pressure pipes communicate while on the suction side, ports 7, 21 are in communication and further ports 66 in the piston and 6 communicating with ports 5 in the cylinder are provided. A make-up valve 15 is provided as shown. In operation pressure fluid admitted through pipes 9, 10 issues from the jet 13 and through the nozzles to the outer air creating a vacuum of high value in nozzle 26 and so exhausts the suction chamber 5 through ports 7, 21. Piston 18 then moves against the spring 22 cutting off the pressure fluid and shutting off the suction chamber S from the vacuum in casing 1. Air is drawn into the compression chamber through the make-up valve and also through the ports 5, 6, 66 which are in register. The spring 22 immediately forces the piston forward compressing the air in the compression chamber which issues from the jet and the cycle is repeated, the pressure fluid from the pipes 9, 10 being throttled to such an amount as is necessary. Fig. 5 shows another arrangement in which the cylinder 3 is provided with a number of pistons and partitions dividing it into a number of compression and suction chambers. These pistons are mounted on a hollow piston rod 38 pressed by the spring 22 and having a portion 42 engaging in a cylinder 41. Connected to this cylinder is an inner cylinder having a spring-pressed piston 46. Ports 55, 60, 6 connect the suction chambers with the atmosphere through the ports 5 while ports 7a ... 7d connect the suction chambers with the vacuum jacket 32. In operation the pressure fluid from pipes 9, 10 issues from the jet 13 and the vacuum caused in the first nozzle 26 is transferred to the vacuum casing 32 by ports 34, 35. These pistons 18 &c., on the piston rod are moved under the pressure of the fluid shutting off the pressure fluid allowing air to pass into the compression chambers C<a> ... C<d> by the ports 44, 49, 50, 57, 57a and cutting off the suction chambers from the vacuum casing. Air is admitted into the suction chambers through ports 55, 60, 63, 6 and the spring 22 urges the pistons forward compressing the air in the compression chambers. This action closes the ports 49, 50 by reaction on the piston 46, and causes a stream of air to issue again from the jet. In Figs. 9, 11 and 12 the control of the air to the suction and compression chambers is by a pair of co-axial cylinders 80, 84 having ports the outer rows of which are in register while the inner rows are not. The cylinders are rotated relatively when necessary by means of a toothed cam 95 co-operating with pins 98, 99 on one of the pistons.