Patent GB-190808956-A (GB)
Title: A Process and Apparatus for the Production of a Vacuum.
Inventor: BENKOE STEPHAN
Filed: 1908-04-24
Granted: 1908-10-29
Abstract: 8956. Benk÷, S. April 24. Exhausting.-A process for the creation of a vacuum consists in gradually closing a vessel during the generation of pressure therein by an explosion or combustion taking place in the vessel or in a vessel connected therewith, the closure being completed when equilibrium of pressure obtains. Fig. 1 shows a simple form of apparatus for the purpose comprising a cylinder having openings 2 in the ends to which are attached closing-disks, mounted on a spindle 5 and having corresponding openings 4. Pressure is generated in the cylinder by the ignition of a liquid hydrocarbon or other substance, the disks leaving the ports 2 open ; as the combustion proceeds, the disks are turned in unison so that the ports are finally closed. Valves, slides, bolts, &c. may replace the rotary disks. Suction tubes may be attached to the vessel so that it may be used for driving motors, pumping water, ventilation, dust abstraction, &c. The vacuum may be alternately used and re-created automatically, auxiliary means, such as a motor operated by an electric current, a spring, a weight, a turbine, or a motor driven by the vacuum, being used to open and close the ports and supply combustible material ; ignition may be electrically effected. Fig.5 shows an arrangement in which the cylinder is in communication with a cylinder 6 having a spring- pressed piston 8, which is pushed out by the spring when the vacuum falls to a predetermined stage. The piston - rod may operate an atomizer, an igniting-arrangement, and valves for the combustible liquid, and may close the vessel. Fig. 6 shows a cylinder containing a piston 13 on a hollow spindle carried in bearings on the supports of the apparatus. The turned portion of the cylinder, in which the piston works, has two rows of holes 15<1>, 15<11> which are alternately uncovered in the terminal positions of the piston. Springs 16<1>, 16<11> bear on surfaces in the supports and in the hollow spindle. The piston is reciprocated by means of compressed air, a weight, or an eccentric, or otherwise. The two chambers formed by the piston are connected by pipes 19<1>, 19<11> to a motor. Valves 20', 20<11> are open to the two ends of the cylinder and to pipes 21<1>, 21<11> leading to a gas generated, and are provided with electric ignition apparatus. The piston being moved to the left uncovers the holes 15', while simultaneously a gaseous mixture is introduced through the pipes 21<1> into the valves 20<1> and the space I. As the spring 16<11> is set free and returns the piston, the gas in the valves 20<1> and the space I is exploded, and air and combustion products are driven out of the holes 15', the remaining gases being rarefied ; the piston then moves to the right until the spring 16<1> is compressed, while at the same time air enters the space I from the motor through the pipe 19', and the valves 20<11> supply a gaseous mixture to the space II. When the apparatus is used on a vehicle, air may be introduced into the motor and so to one side of the piston from the front end of the vehicle under pressure. The pressure may be increased by concentrating the air by a funnel-shaped wind scoop.