US973820A - Cooling attachment for explosive-engines. - Google Patents

Description

S. S. SCOTT. COOLING ATTACHMENT EOE EXELosIvE ENGINES.

v APPLICATION FILED JULY 24, 1909.

Patented 0011.25, 1910.

SEMPLE S. SCCT'1,OF CHICAGO, ILLINOIS.

COOLING ATTACHMENT FORv EXPLOSIVE-ENGINES- A Specification of Letters Patent.

Patented oet. 25, 1910.

' Application led July 24, 1909. Serial No. 509,256.

To all whom 'it may concern:

Be it known that I, SEMPLE S. SCOTT, a citizen of the United States, and a resident of Chicago, `in thecounty of Cook and State of'Illinois, have' invented certaink new and. useful Improvements in Cooling Attachments for Explosive-Engines; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in explosion motors and more particularly to means attached to such a motor for delivering air to its cylinder to cool and thoroughly clean the same during the operation of the engine.

The invention consists in the matters hereinafter set forth and more particularly pointed out in the appended'claims.

The drawing is a view in vertical crosssection of an engine embodying my invention. e i,

In the said, dra\ving,` the parts relating to this invention are shown as aiplied to an engine of the horizontal, oppositely disposed cylinder, four cycle type. Briefly described, said engine comprises two' horizontally arranged opposed cylinders 5 and G attached to and opening into a crank casing 7. Said crank casing contains the crankshaft Sand valve operating gears 9 and "10.

The gear 9 is attached to the crank-shaft 8 and t-he gear 10 is secured to a rotating shaft 11 in the upper part of the crank casing. Mounted upon said shaft 11 4is a. cam 12 which, in the rotation. ofsaid shaft, alternately engages the inner ends of operat- - ing rods 13, 13 which are operatively conbetween the ends of the' 'cylinders 5 and 6 and open through. the walls thereof.

Intake valves 17v casing which is preferably cylindrical in,

shape is provided through its side wall with ports or openings through which air enters said casing. The valve 31,-which is of the ordinary mushroom type, bears against a seat formed upon the inner face of the upper wall of the crank casing and forming a` port opening into the valve casing 30. The valve stem 32, which is attached to the valve disk 31 projects outwardly. through a guide passage formed in the upper end of the valve casing 30 and is' provided at its outer end with an actuating coil spring 33 which is adapted to close the valve. The valve thus arranged is opened by the suction or vacuum created during the compression and scavenger strokes of the piston and is closed by the action of the spring thereon during the impetus and intake strokes of the piston. 'lhe air thus taken into the crank casing during the opening of the intake valve is compressed in the crank casing during the impetus and intake strokes of the piston and is forced into a storage tank 3G which is mounted upon said crank casing. Said casing is carried upon the upper end of a tubular neck 37 which opens into said crank .casing and communication between the two is controlled by means of Aan upwardly opening check-valve, the disk 3S of which is adapted to bear upon a seat formed in the upper end of said neck 37 at its junction with the storage tank 3G. Below said valve seatA is provided a downwardly extending guide stem 39 through which lthe stem 40 of the valve extends; said stem being 4surrounded by an actuating coil spring 41 which is adapted to close said valve in the usual manner. yAs will be seen from this construction, t-he check-valve controlling the which the air intake valve is closed, and as automatically opened simultaneously with the opening of the exhaust valve. As shown in the drawing` each of these valves for delivering. the air into the engine cylinders comprises two chambers 44 and 45, the chamber 44 being connected with the storage tank 36 by a pipe 46 and the chamber 45 chamber 44.

with the engine cylinder by means of a pipe 47. Said pipe 47 is connected at its upper end with said chamber and at its 'lower cnd with a chamber 48 which is formed integrally with the engine cylinder and which opens into the interior thereof through a series of ports 50, 50, said ports being arranged in a row, along the head end of the cylinder equal to the length of the piston stroke. The chambers 44 and 45 are separated by a wall 51 provided with a port opening 52 adapted to be closed by a valve disk 53. A valve stem 54, attached to said disk, projects outwardly from the chamber 44 through a guide passage formed in a lug located upon the outer side wall of the Said lug extends toward the crank casing and is surrounded bv a spring 60, the inner end ot which bears against the outer wall of the chamber 44 and the outer end of which bears against'a pin Glv extending transversely through the outer end of the valve stem 54. The valve disk 53 is moved inwardly to permit the air from the storage tank 36 to enter the engine cylinder bymeans of an arm 65 which is secured to and extends upwardly from the exhaust valve operating rod 13. Said arm is provided onits upper end with an inturned portion which is adapted to engage the outer end of -the valve stem 54 to open the air control valve simultaneously with the opening of the exhaust valve. While the valve for controlling the delivery of air from the storage-tank into the engine cylinder is yherein shown and described as mechanically operated, same may be operated as a check valve by the suction created by theA .plston in the scavenger stroke.

As will be seen from this construction, the air which 1s contained in the storage tank will, upon the scavenger stroke of the engine, be forced into the engine/'cylinder just ahead of the This fresh cool air will drive the burned gases out through the exhaust port of the cylinder 66 and will thoroughly clean the cylinder and at the same time will cool the cylinder, piston and valves.

The arrangement herein shown Aand de-` scribed for cooling and cleaning` thel engine cylinder may .be applied to any style or type of explosive motor and, when used,

water cooling accessories may be. dispensed with, inasmuch as the air thus introduced into the cylinder maintains its parts at a sutliciently low` temperature 'to insure an ehcient operation of' the engine.

I claim as my invention rl l. In an explosion motor, in combination with the crank casing, the power cylinder, the exhaust valve, and the rod for -opening said exhaust valve, a check valve through which `air is taken into the crank casing,- a Storage tank adapted t0 receive air from the crank casing -a pipe connection between said storage tanland the power cylinder, av valve casing in said pipe connection provided with two chambers opening into each other, a valve adapted toclose the openingbetween said chambers, said valve having a stem projecting through the wall of said valve casing, and an arm attached to the exhaust valve operating rod adapted to engage said valve stem to open the valve in the pipe connection.

2. In an explosion motor, the combination with a crank casing, a power cylinder which is provided near oneend with a longitudinally arranged row of ports, an exhaust valve for said cylinder and operating mechanism for sai valve, of a checkrvalve through which air is taken into the crank casing, a storage tank adapted to receive the air fron'rthe crank casing, an air vchamber formed integrally with the power cylinder and covering the longitudinally arranged row of ports therein, a pipe connection adapted to deliver air from the storage tank into the air chamber upon the cylinder wall, and a valve located in said pipe connection and adapted to be opened simultaneously with the opening of the exhaust valve of .the engine.

3. In an explosion motor, in combination with the power cylinder, the exhaust' valve Yand operating mechanism for said exhaust 'on one side thereof, a storage tank containing compressed air, and means controlled by the operatin mechanism of the exhaust valve for de ivering air from said storage chamber Vto said ports in the side of the cylinder upon the scavenger stroke y'of the engine.

4. In an explosion motor, in combination with the crank casing, the 'power cylinder, the engine piston, the exhaust valve andthe valve controlling mechanism, an intake valvein the crank casing which is opened by the vacuum created in the crank casing at the outer stroke of the piston, an ,air storage tank opening into said crank casing, a valve controlling the inlet opening of said tank, said valve being opened by the pressure of air in the crank casing, a re exhaust port located ,near the inner end of the cylinder, and means controlled by the exhaust valve operating mechanism for delivering ainffrom the tank into lthe power cylinder in advance of the piston as it travels toward the outer end of the cylinder on its scavenger stroke.

5. In an explosion motor, in combination Withy the crank casing, the power cylinder, theuexhaust valve for said power cylinder and the operating rodforopening said exhaust valve, a fire exhaust port located near the inner end of said cylinder, a check-valve through which air is drawn into the crank casing, a storage tank which receives the air lfrom said crank casing, a pipe connecting said tank With'said power cylinder at a point or pointsinterrnediate of the ends of said cylinder, a control valve in said pipe em- 15 bracing a valve and stem therefor, and an arm securedto the exhaust valve operating rod adapted 'to engage the end of said valve stern to open said control Valve.

In testimony, that I claimthe foregoing 20 as my invention I aflix my signature in the presence of two Witnesses, this 21st day of July A. D. 1909.

y SEMPLE s. sooTT.

Witnesses: CLARENCE E. MEHLHOPE, GUYM. CAMPBELL.

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