US1438067A - Cooling and heating system for internal-combustion engines - Google Patents

Description

F. 'W. SPRINGER.

COOLING AND HEATING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. I2. I9II.

1 43,967 I Patented Dec. 5, 1922..

2 SHEETSSHEET I.

F. W. SPRINGER.

COOLING AND HEATING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APRB 12, 1917.

1,438,067.. Patented Dec. 5, 1922..

2 SHEETS-SHEET 2- Patented Dec. 5, 1922.

warren YES TENT OFFICE.

ERANKLIN WESLEY SPRINGER. OF MINNEAPOLIS, MINNESOTA.

Application filed April 12, 1917. Serial No. 161,685.

T 0 all w from it may c'oncem Be it known that I, FRANKLIN IVEsLEY SPRINGER, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and useful Improvement in Cooling and Heating Systems for Internal-Combustion Engines, of which the following is a specification. v

My invention relates to cooling and heating systems for internal combustion engines and has for its object to provide a device for quickly bringing the cooling or heating fluid to a desired temperature and for maintaining the cooling or heating fluid at a substantially constant temperature. In carrying out my objects I employ an expansible thermostatic member responsive to changes in temperature which is connected by a system of multiplying levers to a valve positioned within the outlet pipe of the cooling system leading from the engine. This member and lever system is so connected as to cause an opening of the valve suitable to throttle the flow of fluid, an amount suflicient to cause the same to be quickly heated and to maintain a substantially constant temperature about the engine cylinders. Another object of my invention is to provide a device which can readily be applied to existing forms of motors without reconstruction. A still further object is to construct the valve casing and operating mechanism so that the same may bereadily removed or inserted from or into the containing housing for the purpose of inspection or readjustment.

Still another use of my invention is in connection with the heating system of a carburetor of an internal combustion engine wherein the carburetor or the pipe leading from the carburetor to the engine is heated by the" engine exhaust or by the heated cooling fluid from the engine cylinders. In such a case the thermostatically controlled valve may be placed in the outlet pipe of the carburetor heating system and so arranged that the carburetor may be quickly brought to the desired temperature and automatically maintained at that temperature. It is well known that both engines and carburetors function best at certain temperatures, and not so well when either hotter or colder than those respective temperatures.

The only difference between this use and that in connection with the cylinder cooling system is that the thermostatic valve shall be initially open instead of closed, its opera tron being the same; in fact it is entirely possible to use the same valve for either purpose in some cases.

The full objects and advantages of my invention will be found in the detailed description thereof and are particularly pointed out in the claims.

In the drawings illustrating the application of my invention in several somewhat different forms in which my inventive idea may be embodied:

Figure 1 is an elevational view of an internal combustion engine showing the application of my invention thereto.

Figure 2 is a vertical sectional view of one form of the valve, with the valve in the closed position, and operating mechanism of my invention drawn to a larger scale.

Figure 3 is a view similar to Figure 2 with the valve open.

Figure 4 is a. sectional view through a valve casing taken on line l of Figure 2 wit-h the valve and its operating mechanism appearing in top plan.

Figures 5 and 6, are views similar to Figures 2 and 3, respectively. of modified forms of my invention.

The application of my invention to an en gine will be comprehended from Figure 1. An ordinary engine 10 is shown. which is provided with a liquid cooling system of ordinary construction having inlet and outlet pipes 11 and 12, respectively, leading to and from the engine. These pipes are connected to the top and bottom of a radiator 13 which is cooled by a fan 14: in the usual manner. In the engine shown a thermo syphon cooling system is employed. This system lends itself readily to the adoption of my invention. As the valve member of my invention is positioned in the outlet pipe of the system it becomes evident that the same can not be employed where a positively acting circulating pump is used. When however a nonpositive centrifugal pump or'another form of pump is used wherein sufficient slippage may occur the same results may be obtained as in the above specified system. In the case of an air cooled engine, the cooling fluid actuated by a fan would also permit the necessary slippage so that a similar valve of large size would operate in the same way in the air outlet pipe from the engine.

The valve and operating mechanism of my invention is shown in detail in Figures 2. 3 and 1. A casing 15 is formed to receive the same and is provided with a cover member 16. which is secured thereto by screws 17. On the cover 16 is formed a tubular extension 18 by which the device may be connected at one end to the outlet pipe 12. A similar extension 19 formed on the side of casing 15 opposite to extension 18 serves the same purpose. The connection to pipe 12 may be made by. a pair of hose couplings 20 and 21, which are held in place by hose clamps 22 of ordinary construction. In this manner a continuous passageway is formed through the pipe 12 which is enlarged at 23 to re ceive the valve and operating mechanism. The longitudinal passageway through the pipe 12 thereafter continues longitudinally through the casing and the casing in effect constitutes a pipe section which is preferably somewhat larger in diameter than the main .portion of the pipe.

The valve proper is of the butterfly type and consists of a disc 21 which is formed with ears 25 and 26 raised above the plane thereof and situated on opposite sides near the periphery of said disc. A pair of screws 27 and 28 constructed with pivots 29 at the ends thereof are screwed into a pair of bosses 30 formed in casing 15 and engage corresponding sockets 32 in ears 25 and 26. thus forming the axis of oscillation of the disc 21. lVhen these screws are screwed up tight a sutficiently tight. arrangement is secured by means of which the valve disc 21 is permitted to oscillate freely. 'hen in the closed position as is shown in Figure 2. disc 21 engages the lower wall of casing 15 and also a lip 33 formed on the upper portion of said casing and inclined at about an angle of 15, the disc having the same obliquity.

Fpon the center of disc 21 is secured an expansible hollow member 31 by means of a threaded lug which screws into a boss 36 formed on said plate. Member 31 comprises two corrugated disc pieces 37 and 38 which are soldered together at the periphery thereof and which have inclosed between the same a volatile liquid having a suitable boiling point. Disc 37 is secured to lug piece 35 and disc 38 has secured to it a similar piece 39 which is formed with a wedge or protrusion 10.

lfpon the upper portion of disc 21 is formed an arm 11 to which is pivoted a lever 12 extending across the wedge or protrusion and towards the lower portion of the disc; This lever is formed with a similar wedge or protrusion 11 which engages another lever 15 pivoted to an arm 16 on the lower portion of disc 21, which lever extends above the first. named lever and engages by direct contact a lug 17 cast on the under side of the portion of case 15. As will be noted the levers are so arranged as to cause a relatively large movement of the end of the lever 15 for a small movement of the point 10 relative to disc 21. If desired the member 31 may be simply loosely positioned upon the plate 21 without direct attachment thereto, being held in place by the lugs 25 and 26 and the ears 11 and 16.

To hold the valve in the closed position I employ a spring 18 which is secured at. one end to the arm 11 and at. the other end to a slideable rod 19 extending through the casing 15. Rod 19 is manipulated from without by a knurled head 50 and is held in place by a set screw 51. The operation of the device is as follows. \Vhen the engine is cold valve 21 is positioned as shown in Figure 2. After the engine is started the heated fluid from the cylinders rises to the top and comes in contact with the expansible member 31. As soon as the cooling fluid becomes heated sufliciently said member commences to expand and the wedge or projection 10 acts upon lever 12 forcing it outward. At. the same time lever 12 acts in a similar manner upon lcver 15, which being relatively deprived of motion in the direction imparted through lever 12 by stop or lug 17 or wall 15 causes the whole device or the member 31 and disc 21 to oscillate relative to the casing and open the valve. This permits the cooling fluid to flow and become cooled by the radiator. By supplying a proper gas within member 31 and by properly adjusting the tension of spring 18 the device can be made to operate within small limits of temperature and can hence maintain the temperature of the cooling fluid coiistant within a variation of a few degrees.

To prevent the valve from passing the horizontal position when the heat from the cooling fluid is excessive I provide a thumb screw 52 which engages the lower side of plate 21 and serves as a stop. thereby preventing movement of the valve beyond the fully open position. This screw is provided with a stuffing box 53 which serves to prevent leakage and also hold the screw set after .the correct position of the same is determined. A similar screw and stuffing box 51 and 55 are used to raise the valve by hand so as to render the device inoperable when desired and also to adjust for a desired small initial opening of the valve.

Another form of the invention is shown in Figures 5 and 6. In this modification 21 different form of expansible member is used which is shown at 56 and which is constructed so as to expand almost entirely from one side of the plane of the union of the disc elements thereof. This member also serves as the valve proper and is formed with suitable sockets 57 in its periphery in which the aforementioned pivots 29 may be screwed. Upon the movable face or member 56 is mounted a plate 58,

, ders is attained. The fully opened position of the valve is shown in Figure 6.

The advantages of my invention are manifest. An extremely simple device is provided which is positive in action, cheap to construct and install. The space occu-' pied bythe device is relatively short so that the same may be installed on existing engines without reconstructing or" greatly changing the same. The parts arequite accessible and may be *readily exchanged and readjusted. In all of the forms of my invention herein disclosed the arrangement of the thermostatic disc is such that its peripheral plane extends longitudinally of the passageway when the valve is in open position whereby the thermostatic disc offers the least possible obstruction when free flow of fluid is desired.

I claim:

1. In a fluid circulating system means for regulating the flow of fluid responsive to temperature changes comprising a swinging valve member, a thermostatic member mounted on the valve member and means associated with a fixed part of the device for oscillating the valve and thermostatic member from the movements of the thermostatic member.

2. In a fluid circulating system, means for'regulating the flow offluid responsive to temperature changes comprising a swinging thermostatic disc member, and means connected therewith and actuated by-the movement of said member for oscillating the same to regulate the flow of fluid thru the system.

3. In a fluid circulating system, means for regulating the flow of fluid-responsive to temperature changes comprising a rotatable valve,'a thermostatic member mounted on said valve and movable therewith, and a system of levers mounted on said valve and having a member thereof anchored to a fixed portion ofthe system and adapted to transmit oscillatory movement to the valve and thermostatic member from the moveand adapted to oscillate with it, a lever pivoted to said disc, extending across said thermostatic member and adapted to be oscillated by the movement of the same a second lever pivoted to the disc extending above the first lever and adapted to be oscillated by said last named lever and having a free end engaging the casing so that an oscillatory motion is given the disc as the thermostatic member expands.

5. In a fluid circulating system, means for regulating the flow of fluid responsive to temperature changes comprising a casing having a passageway, a valve in said casing adapted to open and close said passageway, a thermostatic member mounted on said valve for movement therewith, and means for operating said valve by expansion and contraction of said thermostatic member.

6. In a fluid circulating system, means for regulating the flow of fluid responsive to temperature changes comprising a casing having a longitudinal assageway therethrough, a swinging va ve in said casing, a thermostatic disc member mountedon said valve for movement therewith, means for mounting said valve and thermostatic mem, her so that thtfy occupy an inclined position when said valve is closed and a longitudinal position when said valve is open, and means for oscillating said valve and thermostatic member by expansion and contraction of said thermostatic member.

Witnesses: FRANK CLEWORTH,

Geo. W. MILLER.

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