US2028937A - Gas mixer - Google Patents

Description

M. LEFEERE Jam, 2%, 3.93%.

GAS MIXER Fi-led Jan. 26, 1934 INVENTOR.

Maurine lefabra.

ATTORNEY.

Patented Jan. 28, 1936 UNI TATE PATiitii 1 Claim.

This invention relates to gas mixers and the object of the invention is to provide a device for thoroughly mixing the gas with the air as it flows from the carbureter and through the intake manifold of an internal combustion engine.

One of the particular objects of the invention is to provide a sheet metal device mounted between the carbureter and intake manifold and arranged to give the air and gas mixture a whirling action to more thoroughly mix the same and also arranged to break up the air stream and produce sufficient turbulence as to prevent raw gasoline from being drawn from the carbureter into the engine.

Another object of the invention is to provide a single stamping arranged with twisted arcuate portions shaped to give the air stream a whirling action and each portion being provided with an aperture to assist in producing turbulence within the air stream.

A further object of the invention is to prevent raw gasoline from being drawn into the engine thus preventing the resultant waste of gasoline and the dilution of the oil in the crank case caused by the gasoline flowing down past the pistons into the engine oil.

These objects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred form of construction by which these objects are attained is shown in the accompanying drawing in which- Fig. 1 is an elevation of a carbureter partly in section to show one type of installation of the device.

Fig. 2 is a face view of the gas mixer.

Fig. 3 is a section taken on line 3-3 of Fig. 2.

Fig. 4 is a face view of an alternative of the device.

Fig. 5 is a section taken on line 55 of Fig. 4.

Fig. 6 is an enlarged vertical section through the mixing tube.

The device comprises a sheet metal plate I, shown more particularlyin Fig. 2. This plate is shaped to conform to the manifold and carbureter flanges and is provided with apertures 2 through which the connecting screws 3 may be threaded. In making the device, an aperture 4 is punched out of the center of the plate and a series of smaller apertures are punched out and arranged circumferentially about the central aperture 4. A slit extends from each aperture 5 radially toward the center of the aperture l thus leaving a series of arcuate or wedge-shaped lugs 6 which are each provided with an aperture 1. Each lug 6 is twisted to extend at an angle to the plane of the plate I and, at the same time, each lug 6 is turned upward so that the series of lugs are arranged in a form somewhat similar to a truncated cone. This device is then mounted between the carbureter l4 and intake manifolds l5, as shown in Fig. 1, with the lugs 6 extending into the intake manifold. With this device in position, the gasoline and air mixture from the carbureter is drawn through the device in passing into the intake manifold. The lugs 6 which are given a slight twist as hereinbefore described produce a spiral whirling action of the gasoline and air mixture and, at the same time, portions of the air stream may pass through the apertures 5 between the lugs 6 and through the apertures 1 in the lugs 6. This gives a whirling action to the air stream which whirling action converges toward the center of the intake manifold and the apertures 5 and 7 assist in breaking up the air stream and producing a turbulence which thoroughly mixes the gasoline with the air so that the gasoline is taken into the engine (not here shown) as a vapor which is free from gasoline globules.

An alternative form of the device is shown in Figs. 4, 5 and 6 in which a tube 8 is positioned as shown more particularly in Fig. 6 and this tube 8 is provided with a series of apertures 9 and I0 and each aperture is provided with a depression H on one side thereof. This tube 8 is also provided with a series of three legs I 2 which, as shown in Fig. 4, are spot-welded to three of the lugs 6 so that the tube 8 is supported in vertical position, as shown in Fig. 5. With this form of the device, the spiral air stream and mixed gasoline vapor produced by the lugs 6 converge on the tube 8 and the air stream may pass in and out through the apertures 9 and In, as indicated by the arrows shown in Fig. 6 and may also pass through the tube 8 as well as about the tube. This tube in effect separates the air stream into inside and outside portions which again mix together beyond the end of the tube and which portions are further mixed in passing through and about the tube. In either form of the invention, the gasoline is thoroughly mixed with the air stream before passing to the engine so that no gasoline in the liquid state is drawn into the engine and thus maximum mileage is attained from the gasoline and, at the same time, dilution of the engine oil is prevented as there is no gasoline residue to pass downwardly about the pistons into the oil in the engine crank case. Due to the fact that all of the gasoline is thoroughly mixed in a form to be completely burned,

.there is no gaseline wastage and consequently 7 provides a device which accomplishes the objects described.

Having thus fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is V In a gas mixer, a sheet metal plate having central aperture and a series of smaller apertures spaced circumferentially thereabout, the plate 7 being provided with a slit extending radially from the central aperture to each smaller aperture an 7 tour of a truncated cone andeach lug being provided with an aperture therethrough and a tube supported on the ends of the lugs and extending in axial alignment with the central aperture of the plate, the tube being provided with a series of apertures and a depression formed in the tube adjacent each aperture, the depressions extending parallel with the longitudinal axis'of the tube.

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