US1611424A - Automobile heater - Google Patents

Description

Dec. 21 @1926. 1,611,424 |T N ELY AUTOMOBILE HEATER Original Filed March 2. 1925 Invanfnr.

\ (Ii/w. I J9 g flap/ Patented Dec. 21, 1926.

UNITED STATES IVAN N. ELY, or MINNEAPOLIS, MINNESOTA;

AUTOMOBILE HEATER.

Application filed March 2, 1925, Serial No. 12,788. Renewed October 22, 1926.

My invention relates to automobile heaters of the manifold type in which the manifold and heater are cast integral.

My invention has as its object to provide a heater especially adapted to deliver a cur rent of .warm air immediately after the starting of the engine to which it is attached.

More particularly, it is my object toprovide a heater in which the ordinary manifold is provided with an air tube extending through it from one end'wall to the other and positioned to receive directly the'exhaust gases from the engine, and to be en tirely surrounded by such exhaust gases.

A further object is to provide means for conducting the air current to the aforesaid air tube,.and conducting it fromsaid tube to the interior of the automobile, said means also serving to provide an auxiliary air passageon the exterior of the manifold in order to increase the capacity of the heater.

A further object is to provide a heater which is cast entirely in one integralcasting, and is at the same time of simple, durable and inexpensive construction.

With these and other objects in view, my invention cons'sts inthe construction, an rangement and. combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my'claim, and illustrated in the accompanying drawings,'in which:

Fig. 1 is an elevation of an engine to which my heater is attached, a portion of the floor boards of the automobile being shown in section.

Fig. 2 is a vertical transverse section through the heater, taken on th e line 22 of Fig. 3. v

Fig. 3 is a vertical longitudinal sectional view through the heater, taken on the line a 3 of Fig. 2.

Fig. 4 is a plan View of the heater, partly in section, taken on the line 4 4 of Fig. 3.

Fig. 5 is a side elevation of the heater.

I have used the reference character 10 to indicate generally an engine of. a common type of automobile, which has the intake manifold, 11 ,and' the exhaust ipe, 12. The, dash of the automobile is in icated at 13, and the foot boards at 14. The ordinary exhaust manifold comprises a longitudinal tube member, 15, having the four elbows, 16. which serve to connect the manifold with the exhaust ports of the engine. The rear end. of the manifold tube, 15, is bent rear- Wardly and downward as at 16, and threaded at 17 to receive the packing nut, 18, conmeeting the manifold with the exhaust pipe, 12. 4 v p In order to remedy the objections of the heaters now in use, the integral heater cast in one piece with the manifold has been provided, which has the advantage of serving to heat the air on all sides instead of on one. That is, the heat from the manifold is conducted almost instantly by conduction throughout the metal walls of the air duct, and the current of air'is thus surrounded on all sides by heated metal walls and absorbs more heat in passing.

Another objection which may behad against the heater which attaches around the old manifold is that the currents of air tend to absorb disagreeable odors from the surface of the manifold and engine block. caused by accumulations of oily material thereon. The integral construction does away with these objections.

My invention is aimed, primarily, to improving the integral type heater by employing an air tube whichis situated within the manifold itselfand exposed directly to; the exhaust gases on all sides thereof. There I are certain problems in'construction of a manifold embodying such a heati which my invention solves.

The size which may be given to the inner heating tube is limited since it is desirable ng tube to maintain the general proportions of the manifold about the same, andat the same time not obstruct the flow of the gases on the interior thereof.

I have used the reference character, 19, to indicate the inner air tube, which is of seamless steel tubing, having its ends cast ifnig the end walls, 20 and 21, of the mani In casting the manifold the sand core used to form the hollow interior thereof is-baked around the steel tube, 19. The ends of the, tube, 19,'are allowed to project beyond the core a walls, 20 and 21, so that whenthe manifold is cast around the core, the tube will become united integrally with the manifold casting. Upon removal of the sand of the core, the interior of the manifold will have the construction shown in Fig. 3.

The manifold is enlarged somewhat in width to preserve practically the same pproximately the thickness of the cross-sectional area between its Walls and the tube, 19, as formerly was had in the old type manifold.

In order to provide sufficient circulation of air, the auxiliary air duct, 22, is formed on the outer side of the manifold. The air duct, 22, follows the general contour of the tubular portion, 15, of the manifold, but does not cover the elbows, 16. This is illustrated in Fig. 5.

The current of air passing through the inner air tube, 19, will, especially during the first fifteen minutes or so of the running of the engine, deliver a much hotter current of air than the outer air duct, 22, and as a result it is desirable that the air from the air duct, 22, be mixed thoroughly-with the heated air from the tube, 19, before-it is discharged into the interior of the car. The air duct, 22, is therefore continued around the rear end wall, 20, of the manifold, as at 23, and thence continued along the plane of the manifold proper, as at 24-.

The portion, 2%, which may be called the neck of the heater, is aligned with the tube, 19, as illustrated in Fig. 41, and the air current from the duct, 22, will thus first strike the air current from the tube, 19, in a transverse direction so as to tend to break up the current from'the tube, 19, and will then tend to completely envelop what remains thereof so as to most completely mix therewith.

A simple butterfly valve, 25, may be provided in the discharge end of the neck, 24, to regulate the flow of air therefrom. At the forward end of the manifold the air duct, 22, is spread around the end of the manifold to form a somewhat ball-shaped receiving cup, 26, to receive the current of air from the fan of the car.

It will now be seen that the tube, 19,will receive the direct heat from the exhaust when the engine is started and will almost immediately commence to discharge a warm stream of air into the neck, 24-. Sullicient heat will be given off thereby to warm the current of air passing through the duct, 22, so that the heater will not discharge a current of cold air into the car when the car is started. After the engine has operated for some time the manifold will become heated to a high degree of temperature, and the walls of the duct, 22, will become heated in the same way by conduction. The current of air passing therethrough will therefore be considerably hotter than that produced in the ordinary attachable type heater.

and it is my intention to cover by my claim any modified forms of structure or use of mechanical equivalents which may be reasonably included within its scope.

I claim asmy invention:

In a (ombined exhaust manifold and vehicle heater, a manifold proper in the form of an elongated tube having a rear downwardly bent exhaust pipe and a rear wall forming part thereof, and having a front wall; a longitudinal air duct formed on the side of the manifold and integral therewith, said air duct extending around the rear wall of the manifold and having a dis charge neck extending rearwardly from the manifold and having its axis disposed substantially in the same vertical plane with the vertical axis of the manifold, said air duct having an intake bell at its forward end extending substantially across the end of the manifold, and an interior air tube having its ends unitedwith the forward and rear walls of the manifold, spaced from the sides of the manifold and extending longitudinally thereof, said tube communicating at its ends with the bell and the disi'harge neck, respectively, of the air duct, being positioned to receive directly against the outer surface the exhaust gases passing through the manifold, and the discharge mouth of said air tube being positioned centrally of said discharge neck.

Signed at Remsen, in the county of Plymouth and State of Iowa, this 3rd day of February, 1925-.

IVAN N. ELY.

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