US1135544A - Carbureter. - Google Patents

Description

R.' P.' NORTON.

CARBURETER.

APPLICATION FILED IuIY 22, 1912.

Patented Apr. 13,1915.Y

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R. P. NORTON'.

CARBURETER.

APPLICATION FILED JULY 22. 1912.

Patented Apr.. 13, 1915.

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RAYMOND I. NORTON. 0F MARSHALLTOWN, IOWA', ASSIGNQR OF ONE-THIRD T0 W. A. NORTON, 0F MRSHALLTO WN, IOWA.

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T0 all whom 'it may concern Be it known that I, RAYMOND 1P. Non'roN, a citizen of the United States, residing at Marshalltown, in the county of Marshall and State of Iowa, have invented a certain new and useful Carbureter, of 'which the following is a speciication. I

rlhe .object of my invention is to provlde a carbureter of simple, durable and inexpensive construction, provided with mechanism whereby the air inlet openings and the throttle valve to the engine may be controlled by a single lever.

A further object is to provide such a carbureter provided with means for adjusting the size of the air inlet opening with relation to the size of the discharge opening at the point where the throttle valve is located.

A further object is to provide the said carbureter having means whereby gasolene may be admitted to the mixing chamber by the operation of the same lever which ricontrols the throttle valve, and the air. inlet opening.

A further object is to provide in such a carbureter a simple and easily regulated means for adjusting the mechanism which controls the flow of gasolene into the mixing chamber.

A further object is to provide in such carbureter a new and novel adjustable device for regulating the size of the air inlet opening.

Still a further object is to provide a carbureter having mechanism for controlling the opening in the carbureter shell around the gasolene ,feed nozzle, a valve which coacts with said nozzle in unison in such manner that air is permitted to flow upwardly through the carbureter around the gasolene feed nozzle for producing a uniform mixture.

My invention consists in certain details, in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth,

pointed out in my claims and illustrated in the accompanying drawings in which- Figure 1 shows a side elevation of the carbureter embodying my invention. Fig. 2 shows a vertical, centra-l, sectional view of the same. Fig. 3 shows a vertical, central,

Specification of Letters Patent.

and for controlling Fatented Apr. 13, 1915.

Application led July 2:2., 1912. Serial No. 711,013.

sectional view of the mixing cliamberand adjacent parts taken on a line at right an` gles tothe View shown of Fig. 2. Fig. 4- shows a top or plan view of my carbureter. Fig. 5 shows a. top or plan view of the movable .segmental plates whereby the air inlet openlng is formed. Fig. 6 shows a plan view of the circular plate just above the segmental plates shown in Fig. 5. Fig.

shows a detail view of part of the plateshown in Fig. 6, and of the link attached thereto, and Fig. 8 shows a detail view of part of the actuating levers for operating the carbureter.

ln the accompanying drawings, I have used the reference numeral 10 to indicate generally the casings containing a float feed. Screwed into the bottom of the casing 10 and communicating with the interior thereof, is a gasolene inlet tube 11, the upper end of which forms a valve seat for the needle valve 12. The upper end 13 of the casing 10 is a detachable plate and is provided with a central opening in which isreceived an externally and internally screwthreaded cylinder 14. Formed on the lower end of the cylinder 14, within thecasing 10 are a collar 19. On the stem 17 between the collar 19 and the screw plug 16, is an extensible coil spring 20, designed to exert yielding pressure to hold the valve 12 in its v seated position.

ln order to control the valve 12, and the position of the fioat 18, l secure to the upper side of the float 18, on opposite sides thereof, bell crank levers 21. One arm of each bell crank lever 21 is pivoted to the upper surface of the float 18, and is also so mounted thereon, as to permit a slight horizontal sliding movement of the end of the lever with relation to the float. The other arm rests just below thecollar 19. Each of the bell crank levers 21 is centrally pivoted on from the lower one of the bracket arms 15, so that when the float is at thelower limit of its mo vement,l

its weight acting against the spring 20, will raise}the valve 12.

When sufficient gasolene has been admitted to the interior ofthe casing 10 to raise the float 18, the inner ends of the bell crank levers 21 will be lowered and the spring 20 will force the valve 12 to its seated position.

Formed on the lower portion of the cas-A ing 10 is a laterally'extending casting 23. The casting 23 extends into and through a hollow cylinder 24. Within the cylinder 24 and extending upwardly therein, from the casting 23, is a tube 25. Formed in the casting 23, is a passage way 26, which leads portion of the interior'of the casing 10, to the lower end of the tube 25. Extending downwardly from the passage 26 within the cylinder 24 is a short tube 27, in the lower end of which is a pet-cock 28, for draining the passage way 26 and the tube 25.

Approximately at the level of the upper end of the tube 25, the cylinder 24 is provided with a circumferential annular flange 29, which terminates in a vertical circumferential annular flange 30, which is externally screwthreaded. Above the cylinder 24, is a cylinder 3l, somewhat smaller in diameter than the cylinder 24. The cylinder 31 has on lits lower end a horizontal circumferential annular flange 32, designed to rest on the upper surface of the flange 30. For securing the cylinders 24 and 31 together, I provide an internally screwthreaded ring, 33, having at its upper end an annular inwardly extending flange 34. The ring 33 is designed to be set down over the flange 32, and to be screwed on to the flange 30. It will thus be seen that a space is left between the flange 2.9 and 32. To prevent rotation of the cylinder 31 and the ring 33, with relation to the cylinder 24, when the parts are assembled, I provide a pin 35, which is received in the corresponding openings inthe flange 34, the flange 32 and the flange 30.

At its upper end, the cylinder 31 is provided with laterally extending flanges 36, by which the carbureter is mountedV on the enine.

g In the upper end of the cylinder 31, is mounted a butterfly or throttle valve 37, the stem 38 of which extends to position outside the cylinder 31. Fixed on the outer end of the stem 38 is a segmental plate 39 on Iwhich is formed a lever handle 40. By the movement of the lever handle 40, the throttle valve 37 may be controlled.

For controlling the air inlet opening around the upper end of the gasolene inlet tube 25, I have provided the following mechanism: Extending upwardly from the flange 29 at regular intervals are pins 40. Pivoted slots.

-slots 44 and the Fig. 5. Above the plates 41, I place a flat. disk 43 which is provided with a plurality of slots 44 designed to receive the upwardly extending lugs 42. The slots 44 are elongated on radial lines of the plate 43 to permit sliding movement of the lugs 42 in said At oneside, the plate 43 is provided with a horizontal extension 44 which is re- 'ceived in an elongated slot 45 in the flange 33. When the plates 4l are in their outward position, as shown in Fig. 5, the extension 44 is at the right hand end of the slot 45, as said slot is shown in Fig. 6. When the extension 44 is moved to the left hand end of said slot, the lugs 42 slide inwardly in the plates 41 reduce the area of the central air inlet opening as shown by the dotted lines in Fig. 5. On the upper side of the extension 44 is fixed a block 46, the upper surface of .which is approximately level with the upper side of the flange 34. Pivoted to the upper side of the block 46 is a horizontal link 47. Fixed on the cylinder 31 is a bracket 48. Detachably and ivotally mounted at a point between its en s on the bracket48 is a lever 49. Pivotally mounted on the plate 39 at a point spaced apart from the longitudinal axis of the lever arm 40, is a rod 50. The rod 50 is pivotally and slida- .bly mounted on one end of the lever 49 as shown in Fig. l. On the other end of the lever 49 is detachably fixed a curved arm 51, and adjacent to the convex surface thereof, is a flat spring 52, one end of which is secured to the link 47. The spring 52, the arm 51 and the lever 49 are so arranged with relation to the link 47, that when the end of the lever 49 to which the arm 51 is fixed is raised or lowered, the link 47 will be moved in such a manner as to rotate the plate 43 and thereby operate the plates 41 for opening the air inlet opening or closing it. By means of the rod 50, the plates 41 and the throttle valve are operated in unison by means of the lever 40.

The rod 50 is mounted on the lever 49 in the following manner: On the lever 49 is slidablv mounted a block 53 which may be adjusted in any position of its movement by means of a set screw 54. Rotatably mounted on the block 53 is a collar 55 which'is provided with an opening in which the rod 50 is slidably received. A set screw 56 may be used' for fixing the collar 55 in any position of its movement on the rod 50.

By means of the mechanism just described, the relative movements of the throtinstaat lene from the tube 25 into the lower part of the cylinder 31, which forms a mixing chamber, by means of the lever 40, l have provided the following mechanism: A cross rod or brace 57 is mounted within the cylinder 31 above the upper end of the tube 25 in the following manner: In one side of the interior of the tube 31 is a recess 58 in which one end of the rod57 is received. ln the opposite side of the tube 31 is a screwthreaded opening in which is received a screw plug 59, in the inner end of which' is a recess which receives the other end of the rod 57. lin the rod 57 is a central vertical opening 60. A. bell crank lever 61 is centrally pivoted at a point vjust above one edge of the slot 60 with one arm extending downwardly into said slot and with the other arm extending horizontally above said slot. ln the last mentioned arm of the bell crank lever 61 is an opening in which is received a valve stem v62. On the upper end of the valve stem 62 is a head 63 by which said valve stem is prevented from sliding.

downwardly through the opening in said. bell crank lever. On the lower end of the stem 62 is a valve 64 which coacts with the upper end of the tube 25. 0n the stem 62, just above the valve 64 is a ball 65 which serves to scatter the gasolene vapor which is discharged into the mixing chamber from the tube 25. Mounted on the stem 62 between the ball 65 and the rod 57, is an extensible coil spring 66. lin the end of the rod 57 adjacent to the downwardly extending arm of the bell crank lever 61, is a longitudinal openingwhich registers with an opening in the tube 31. In the openings just described, is slidably mounted a yrod 68,

the inner end of which stands adjacent to the downwardly extending arm ofthe bell crank lever 61. Pivotally mounted on the outer side of the tube 31, above the outerend of the rod 68, is a swinging lever 69.- Centrally pivoted on the lower end of the lever 69, is a lever arm 70, the lower end of which is received in a slot 71 in the inner side of the bracket arm 48. Secured to the inner side of the plate 39, near the point where the rod 50 is pivoted thereto, is a flat spring 72. The other end of the flat spring 72 is designed to normally rest adjacent to the opposite side of the inner surface of the plate 39. Mounted in the plate 39 are screws 73 which extend from the outside to a point beyond the inner surface of said plate 39 and are designed to engage the side of the spring 72 which is adjacent to said I- plate 39 thereby holding the free end of the of which is flat.

spring 72 away from the plate 39. Mounted in the upper end of the lever 70, is a roller 74 designed to engage and travel along the flat spring 72 when the lever 40 and the plate 39 are moved. It will be seen that when the roller 74 travels from the fixed .end toward the free end of the spring 72, the upper end of the lever 70 will be .moved inwardly toward the tube 31. 'llhe outer end of the rod 68 stands in the path of the lever 70 and is pushed inward when said lever is moved toward the tube 31. Mounted in the bracket arm 48 is a rod 75 on the inner end of which is a head 76, one' side of which is convex and the other side rllhe head 76 is between the lower end of the lever 70 and the bracket arm 48 and the lower end. of the lever 70 rests-against said head. rlhe position of the lower end of the arm 70 maybe regulated by turning the rod 75 to present either the flat side or the convex side of the head 76 to the lower end of the lever arm. Connected with the rod 76 by means of the universal joint, is a controlling rod 77 by means of which the rod 75 and the head 76 may be operated.

In the practical operation of my improved carbureter, gasolene is drawn through the carbureter and is admitted through the tube 11 into the casing or receptacle 10. rll`he weight of the float 18 raises the valve 12 and permits the intake of gasolene. When a certain predetermined liquid has accumulated within the casing 10, the float 18 is raised and the valve 12 is seated by the ac- .tion of the spring 20. Gasolene is fed from the casing 1() through the passage-way 26 to the tube 25. When the engine is started, the lever 40, as shown in Fig. 1 is moved to the right, thereby opening the throttle, moving the plates 41 to increase the size of the air opening and unseating the valve 64 to admit gasolene into the mixing chamber. By means of the screws 73, the spring 72 may be adjusted, thereby regulating the operation of the lever 70 and the valve 64. 'llhe operation of the valve 74 may also be regulated to some extent by means of the rod 75 and the head 76. By moving the bl'ock 53 longitudinally on the lever 49, and by rnovingthe collar 55 longitudinally on the rod Y -able to thoroughly and completely adjust the gasolene intake, the air intake, andthe throttle valve with relation to each other.

Itwill, of course, be understood that the parts of my improved carbureter are so arranged that a suliicient quantity of air passes the upper end of the tube 25 at a sufficient velocity to draw more gasolene from the tube 25 than will be needed and that the valve 64 prevents flooding the carbureter. It is advisable in a 'carbureter of this kind that the flow of air past the upper end of f the tube 25 should be so controlled and regulated at the nozzle and with reference to the needle valve as to produce as nearly as possible a uniform mixture. This advisable condition I am able to accomplish by regulating the size of the opening around the upper end of the tube 25 in unison with the movement of the throttle valve 37 and the needle valve. In view` of the facts just mentioned it will be seen that the flow of gasolene is regulated by the valve 64 but the relative amount actually taken up by the air is regulated by the velocity of the air, the volume thereof and the courseof travel of the air past the deflector ball 65.

I have found by a great many experiments that by controlling the size of the air opening immediately around the discharge end of the gasolene intake, usually called the nozzle, I am able to regulate quite accurately the mixture for. keeping it uniform. This is especially true where the needle valve is regulated in unison with the iris valve. The carbureter may be adjusted so that when the engine is run at low speed the proper mixture is secured. Assuming this to be accomplished, then if the speed of the engine increases the suction through the carbureter is increased, thereby increasing the flow of air and carrying with it an increased amount of gasolene. It is usually true, however, when this happens, that the gasolene increases more than the proper `amount in proportion to the increase in the air. This is true because with the usual carbureter the construction is such as to provide a greater vacuum than in my device. As will be seen in the=drawing the air opening around the nozzle is of considerable size even when the iris valve is closed. The construction and regulation of my carbureter is such that the vacuum pressure is borne by the throttle and not by the air valve. With my device, the air flows comparatively freely around the nozzle at all times and therefore the variation in the speed of the engine, while it does increase the suction and therefore increases the supply of air and gasolene, does not increase the gasolene supply out of proportion.

. Assuming the proper mixture of gasolene and air to be approximately 1 to 11, and assuming the throttle to remain in fixed position while the engine is run at low speed, and

meter is such that there assuming that the pro er mixture is then secured, if the speed o the engine then increases and the construction of the carbuis considerable vacuum at the nozzle, then both air and asolene will increase but the proportionate increase of gasolene is too great.

With my device Where the opening around the nozzle is comparatively large, a comparatively small degreeof vacuum is created b increase in engine speed without throttle change and under such conditions the increased supply of gasolene and air occurs in approximately the proper fixed proportions. When it is desired to control the increase of fuel supply, the construction of my carbureter is such that when the throttle is opened, the aii` opening is enlarged and the needle valve is slightly raised and the uniformity of the mixture is thereby maintained. I have taken it to be a fact, however, that to regulate the flow of air and to control the inflow of gasolene by means of a valve alone is not sutlicient to produce a perfect mixture which will be uniform at all times.

In order to effect a complete admixture of the gasolene and air and to complete the vaporization 'of the gasolene I have provided on the stem 62 the deflector ball 65. In this connection it may be noted that with a comparatively restricted opening around the upper end of the tube 25, and a comparatively small inflow of gasolene, the gasolene and air will properly mix. When, however, the valve 64 is raised and the opening around the upper end of the tube 25 is enlarged, the tendency would be for the gasolene to pass upwardly with the air, and in the absence of some deflector the mixture in the center of the tube 30 would be very rich and the gasolene would not be thoroughly vaporized, while the mixture around the outside of the tube 3l would be poor. That is to say in the center of the tube 31 there would be an excess of gasolene, and around the outside there would be very little gasolene. By means of the ball 65 the gasolene passing upwardly is deflected outwardly and driven 'toward the side walls of the tube 31 so that the gasolene is drawn into the upwardly passing current of air, and thoroughly mingled therewith. It will be seen that at 1 in the size of the air opening around 'the nozzle and the opening of the needle valve, While it causes an increase in air supply and gasolene supply, does not maintain the forming a valve seat at its discharge end,

an adjustable closure device surrounding said nozzle near its discharge end and adapted to vary the size or the opening in the shell around the nozzle, a needle valve arranged to c'oact with said seat, and provided with an upwardly extending stem, a valve raising device slidably mounted on the said stem, a deiiector device on 'said stem above said valve, and a yielding device arranged between said deflector and said valve raising device.

2. In a carbureter, a shell having an air inlet opening and a discharge passage, a fuel feed nozzle extending into said shell to a point between said opening and passage and forming a valve seat at its discharge end, an adjustable closure device surrounding said nozzle near its discharge end and adaptl ed to vary the size of the opening in the shell around the nozzle, a .needle valve arranged to coact with said seat, and provided with an upwardly extending stem, a valve raising device on the said stem, slidably. mounted, adefle'ctor device on said stem above said valve, a yielding device arranged between said deiiector and said valve raising device, a throttle valve in said discharge passage, and means for simultaneously controlling said throttle valve, said closure device and said needle "vr-rive controlling means 3. ln a device et the class described, a carbureting chamber having a discharge outlet, a throttle valve in said discharge outlet,

a stem thereon extending outside said chamber, a fuel inlet tube extending intok said Chamber, the upper end of said tube forming a valve seat, a valve arranged to coact with said seat, an upwardly extending stem thereon, a centrally pivoted bell crank lever having one end pivoted to said last named stem, a rod slidably mounted in the Wall of said chamber and designed in one position to engage the freev end of said bell crank lever for opening said second valve, an arm centrally pivoted to the outer end oit said rod, adjustable means for limiting the outward movement of one end of said arm, means mounted on said throttle stem tor engaging the other end of said arm and moving it inv wardly when said throttle stem is moved to a certain position of its movement, and a link pivoted to said chamber and to said arm for supporting it.

4. 1n a device of the class described a carbureting chamber having a discharge outlet, a throttle valve in said discharge outlet, a fuel inlet tube extending into said chamber, the upper end of said tube forming a valve seat, the valve arranged to coact with said seat, a rod slidably mounted in the wall of said chamber and operatively connected with said valve, said valve being arranged so that it is normally seated and is raised by the inward movement of said rod, an arm pivoted to the loutside ot said shell, and extending roln position above te position below the outer end of said rod, means whereby said arm and said throttle valve may be operated in unison, and means whereby the limit of the outward movement of the lower end of said arm may be regulated, said iJneans comprising a rod rotatably mounted, and having a at side adjacent to the lower end of said arm..

Des Moines, llowa, d une 27, 1912.

RAYMND P., NRTGN.

Witnesses:

G. A. More, W. A., Nonnen

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