US1536810A - Primer and choke - Google Patents

Description

May 5, 1925.

c. 5. REDDIG PRIMER AND CHOKE 2 Sheets-Sheet 1 Filed Oct. 19 1921.

f/idrfzri by K wry C. E. REDDIG PRIMER AND CHOKE Filed Oct. 19, 1921 I 2 Sheets-Sheet 2 Fig. 4,

May 5,1925. v 1,536,810

,1, llllllllll" m l kiforj' c/zw'zastifmg Patented May 5, 1925. I

;.;umT:DSTATESPATENT F C -q [CHARLES E. REDDIG, 0F RICHMOND-HILL, NEW YORK, ASSIGNOR TO WESTERN ELEC- "rare COMPANY, INCORPORATED, or'nnw'yonx, N. Y., A CORPORATION or NEW PRIMER -AND CHOKE.

Applicationjfiled October 19, 1921. Serial No. 508,771;

7. 0 allaciwm it may concern: a 7

Be it known that I,v CHARLES E. Rnnnio, ajcitizen of the United States, residing at RiclnnondI-Iill, in the county of Queens, State of; l\ ew York, have invented certain new. anduseful Improvements in Primers andgChokes, ;which the followingis a full, clear, concise, .and'exact description.

This invention relates to improvement in devices for priming and choking internal combustion engines and relates particularly to a single unit wl ichservesboth as a primerand choke. I f t a Theobject ofthe inventi0n is,.in general, toprovide means for accurately regulating the amount of air deliveredto themanifold of an-internalcombustion engine,v and to provide a simple rugged 'means, whereby ..1raw.fuelmay. be injected in the manifold forpriining'theengine, a In accordance with the general features of this invention, the air intake pipe of an internal combustion-{engine is arranged to deliver air through. an jorifice'in a flat sur- 25 face and the manifold;isarrangedto receive air from another orifice in the same flat surface. .In sliding. engagement with the flat surface is a hollow-cup-like member having 2 orifices, and arrangedso that -it can be-rotated to effect any degree of registration between its two orifices and the orifices leading from the air-intake and to theenginemanifold. In thisway the volume of air deliveredto the manifold, can be regulatedw I v In order -to provide for priming the engine, the rotatable member is provided with separate compartment. having anaperture which canbebrought into registration with the orifice-leading to the manifold. An, opening allows raw fuel to be poured into this separate compartment, from which it runs through the aperture into the mani- "fold.

Referring to the drawings:

Figurel is afragmentary vertical section showing the invention in connection p in place by a cotter pin 21, serves to keep with an engine cylinder and a special type of electrically regulated.carburetor., Figure 2 is a topfplan view, partially in section, showing the carburetor regulator with the cover removed.

Figure 3 is a side elevation of a prime "mover dynamo plant in which the prime position for priming purposes.

' needle valve mover is an internal combustion engine equipped with the present invent on, and showing the relative position of thecarburetorregulator, the intake manifold and the L combined primer and choke.

F ig. 4 is a fragmentary elevation showing the combined primer and choke device. Fig. 5 is a vertical sectional View of the primer and choke device in position for air regulation.

Fig. (iisa vertical sectional view of the combined primer and choke mechanism in Referring now to the drawings in detail, an internal, combustion engine cylinder 1,

- having heat radiating flanges 2 (Fig. 1)]is provided with an overhead valve 3.-tlirough, which an explosive charge is admitted." An intake manifold 41, having communication with the valve chamber has a constricted neck portion 5. Integral with said manifold and located above said constricted neck portion is a valve housing 6 containing a I threaded so that it may be. adjusted by rotation within said housing. A helicalspring 9 rests upon said housing, serving'as'a frictionalresistance to holdthe valve in placei Beyond the opening of the needle valve and located in a wider portion of the manifold 1,. is a butterfly valve. 10, rotatably mounted upon a ball-bearing pivot-{11, so thatit may be easilyrotated to anyangle desired. The butterfly valve is secured to a e ste1n12, which is an extension of the axis of an electromagnetic regulator,13.- v Accurate achustmentofthe amount of air oassin throu 'h an air assa 'e;14= lead the intake manifold l- ,A helical spring 19 compressed by a washer 20, which is held the'cup 17 fluslragainst the walls of the intake manifold i. v v

The end 22 ofthe intake manifold 4 beyond the butterfly valve 10 is open, as is the adjacent side 23 0f anair chamber 16 which "is in communication with the upper end of the stem 8 v of which is the air passage 14 (Figs. 5 and 6). The combined priming and choke cup 17, com prising an'annular rounded chamber 63 and a base portion 64, is pressed against the end of the manifold 4 and the side of the chamber 16 by the spring 19 so as to cover both of the openings and 23. The base 64 of the cup 17 is provided with two diametrically opposite openings and 25, which are equal in diameter to the openings 22 and 23. By rotating the cup 17, the openings 24 and may be brought into partial or total reg istration with the end of the manifold 4,

and the side 3 of the chamber 16, thus pern'iitting air to pass from the chamber 16, through the annular chamber (53 of the priming cup 17; and into the manifold 4. The outer surface of the cup 17 has integral therewith'two lugs 26 and 27 located at an angle of approximately 90 from each other which engage a flange 28 of the electromag netic regulator casing 13, which lugs serve to limit the rotation of the cup 17 to a one quarter turn in each direction. The face of the cup between the lugs 26 and 27 is graduated for accurately regulating the amounts of air passing therethrough.

The interior of the cup 17 is provided with a partition 31, which forms a separate chamber 66 within the cup for priming purposes. The priming charge is introduced through a hole (Fig. 4) located between the lugs 26 and 27, and is permitted to pass into the intake manifold through a small orifice 32in the base 64 of the cup 17.

Electromagnetic control of the needle valve 7 andthe butterfly valve 10 is obtained by the action of regulator 13. The regulator 13 is contained within a housing, the base ('37 of which is made integral with the intake manifold 4. Circular field laminations 37" riveted together at 68 and having pole pieces 36, and 37 integral therewith fit into an annular recess 69 in the base 67. Surrounding the laminations 37 is a split cylindrical shell 70 which is clamped to the field lan'iinations 37 by means of a bolt 71 which passes through 'ears 72 formed integral with the regulator casing. A cap portion 73 fits securely upon the shell 70.

Regulator field coils 34 and 35. are wound upon the field poles 36 and37 respectively. A rotatable armature 38 is mounted on the shaft 12 and is supported by a washer 74 held in place by a cotter pin 75. A nut 40 fitted over the threaded end of the axis 12 looks armature 38 against washer 74, causing armature 38 and shaft 12 to rotate together. An arm 39, integral with the armature 38 is provided with hooks 41 and 42, which serve to hold two helical springs 43 and 44, respectively. The springs 43 and 44, which serve to retard the motion of the armature 38 are rigidly held at their opposite ends by ears 45 and 46 integral with the regulator through the needle valve 7.

casing 13. Adjustable threaded lugs 46 and 47 are fitted into the regulator casing 13 and engage lugs 147 and 48 respectively, which are integral with the armature 3S, limiting the motion of the armature to about 30. A second arm 49 mounted on a pivot 50 is connected with the bifurcated end of the arm 35) through a pin (57 and is rotated thereby through an angle equal to that through which arm 39 is free to move. The needle valve stem 8 is attached to the arm 49 and is rotated in response to movements of the regulator. The needle valve 7 is made adjustable relative to the arm 49 by means of a serrated knob 58 which is attached to the upper portion of the stem 8 and is kept from rotation by means of a lug 51, which is fitted into a recess 52 in the arm 49, and kept in engagement with arm 50 by means of a compression spring 53. The axis, or stem, 12 of the regulator 13 extends through intake manifold 4 where the butterfly valve 10 is attached for rotation therewith.

The coils 34 and are energized through a cable leading from an electric dynamo (58 (Fig. 3), which is driven by the prime mover, and are responsive to the voltage of the dynamo circuit. An increase in voltage in the dynamo circuit causes the arn'iature 38 to turn against the action of the springs 43 and 44, closing the butterfly valve 10 and limiting the amount of fuel which is permitted to pass through the needle valve 7; whereas a decrease in voltage, such as occurs when a number of translating devices are addedto the dynamo circuit, permits the springs 43 and 44 to contract, turning the armature 38 in a clockwise direction and opening the butterfly valve and simultaneously permitting more fuel to pass from a low level tank through a feed pipe 57 and 'If the prime mover dynamo system be employed to charge a battery, then the electromagnetic regulator will serve to give the battery a tapering charge as the back C. M. F. from the battery increases and the engine gradually slows down. This method of charging prolongs the useful life of the battery.

The, improved construction enables the engine cylinder to draw its entire air supply from the engine crank case 15 and to control the amount of air taken up in this manner by means of the manually adjustable choke 1'7 and the automatic air valve 10. The air drawn from the crank -a se is warm and more readily forms a combustible mixture with the fuel. This air also contains unexploded vapors which have leaked by the piston and these vapors are utilized in forming a new explosive mixture. In priming, choke 17 permits a small amount of air to pass from the atmosphere into the intake manifold through orifice 32 together with the priming velocity through the constriction 5, where the decrease in pressure resulting from the rapid passage of the air causes fuel to be drawn directly from low level fuel tank 56 t0 needle valve 7., At no point in lhe fuel feeding system is a ravity reservoir or a float controlled cham er employed, but the fuel, on the other hand, is fed directly from the low level tank to the mixing chamber.

The fuel rising in supply pipe 57 enters the needle valve casing 6 at a point 58 and passes through screen 59 before entering the needle valve proper. The screen 59 is placed within a short tube 60 having orifices 61,

, through which the fuel is fed. A threaded plug 62 permits the tube .60 to be removed, together with the screen 59so that the screen may be cleaned. I

Although the invention is disclosed and described in connection with an internal combustion engine which is employed to drive a dynamo electric machine, it is to be understood that the invention is not limited in this respect, but is to be defined solely by the' ed into two chambers, a baseplate having diametrically opposite orifices therein com municating w th one chamber, an mtake manifold having an opening in its end adjacent said cup, a crank case, an air passage from said crank case to saidvpriming cup havlng an opening in its end ad acent said cup, said cup being rotatable'so that the openings therein may be placed in registration with the openings in said air passage and said manifold.

2. In an internal combustion engine a hol-' low member provided with an orificed surfacewhichis in sliding engagement with second surface having two orifices leading from an air intake pipe, and to the engine manifold respectively, said member being rotatable to regulate the amount of air delivered to the engine 'manifold. 3. In an internal combustion engine, a hollow member provided with a surface in sliding engagement with a second surface having an orifice leading to the engine cylinder, and a partition dividing said member into an apertured compartment and an orificed con'lpartment, said member being rotatable so as to place either of said compartments in communication with the engine cylinder. 4. In an internal combustion engine having a manifold, a plane surface having a pair of orifices, the first leading to the engine 'manifold; anair intake pipehaving connection in the crank case of said engine and arranged to deliver air through saidsecond orifice; a shutter having perforations disposed to register with said orifices and movable for regulating the amount of air de-' livered through said orifices to said engine manifold and means for indicating the position of said fices.

5. Ina primer for an'interna'l combustion engine having an explosive chamber; a surface having an orifice in communication with said, explosive chamber; another orifice in said surface connected to an air intake pipe; an apertured hollow member for receiving liquid fuel and for establishing communication with said orifices; said member being movable to cause registration between an aperture in said hollow'member and the first mentioned orifice; whereby the engine may be primed with liquid fuel, means to prevent the movement of said member in one direction when the hollow member is in mg istry with one of said orifices for priming said engine, and means to prevent the movement of said member in another direction when the path through the hollow member and the orifices is established.

In witness whereof, I hereunto subscribe my name this 13th day of OctoberA. D., 1921.

CHARLES E. REDDIG.

shutter with respect to said ori--

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