US1781731A

US1781731A - Automobile heater

Info

Publication number: US1781731A
Application number: US226550A
Authority: US
Inventors: Quintin G Noblitt
Original assignee: Indianapolis Pump & Tube Compa
Current assignee: Indianapolis Pump & Tube Co; Indianapolis Pump & Tube Compa
Priority date: 1927-10-17
Filing date: 1927-10-17
Publication date: 1930-11-18
Anticipated expiration: 1947-11-18

Description

Q. G. NOBLITT AUTOMOBILE HEATER Filed Oct. 17, 1927 INVENTOR.

QU/NT/N G. N EL 7 BY g g 1 TORNEYS.

Patented Nov. 18, 1930 UNITED STATES PATENT OFFICE QUINTIN G'. NOIBLITT, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO INDIANAPOLIS PUMP & TUBE COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION AUTOMOBILE HEATER t This invention-relates to a heater construcion.

The chief object of this invention is to provide a heater construction which is associated with an elongated conical muffler of an automobile and which heater is-adapted to supply heated air to a lurality of. compartments if and when desired:

The chief feature of the invention consists in the particular construction of the heater,

whereby air is heated by the exhaust gases passing thru the mufiier of a particular shape and is subsequently supplied to one or more compartments of a vehicle including the en- 1gline supplying the exhaust gases to the muf- The full nature of the invention will be understood from the accompanying drawings and the following description and claims: In the drawings Fig. 1 is a central sectional view thru a portion of a motor vehicle with the engine, muflier, exhaust pipe, heater and supply and discharge conduits thereto shown in elevation. Fig. 2 is an enlarged central section thru the heater, the muflier and exhaust pipe being. shown in elevation. Fig. 3 is a transverse sectional view taken on line 3-3 of Fig. 2 and in the direction of the arrows. Fig. 4 is a view similar to Fig. 2 and ofa modified form of the invention. Fig. 5 is a transverse sectional iew taken on line 55 of Fig. 4 and in the direction of the tured as at 24 and mounted therein is a regulating register 25 (in the forward compartment and 26 in the rearward compartment). A conduit 27 connects the forward compartment register 25 with the heater (indicated generally by the numeral 30) and the rearward compartment register 26 is connected by the conduit 28 to said heater. The heater 30 includes an outlet or discharge 29 to which conduit .27 connects and a discharge 32 to which conduit 28 connects. An intake 31 is connected by a flexible conduit 33 to a flared mouth or funnel 34 which constitutes the air intake and the conduit 33 extends upwardly so that said funnel or intake is positioned adjacent the radiator and is supplied with relatively clean and fresh air.

In the resent form of the invention the heater casing 30 is substantially conical and is herein shown comprised of a pair of semiconical sections, one section including the intake 31 at the forward end and the other section including the discharge outlet 32 at the rearward end and the discharge outlet 29 in the forward end. Herein the conical casing 30 is concentric and coaxial with the conical muffler 14. Conicalmuflier 14 has its intake head 13 substantially bell-shaped and its discharge portion 15 is also bell-shaped. Each end of the casing 30 includes an inturned end for embracing the mufiler adjacent the bell-shaped head. Herein the forward end of the heater casing has the central opening 49, while the rear end of the casing includes the central opening 50. The two mating sections of the casing have abuttable longitudinal flanges 33 and are maintained in conical relation by the encircling clamps 51 secured by the bolt and nuts 52, or if desired, a modified form of clamping arrangement may be employed such as shown in Figures 4 and 5 hereinafter described.

' Positioned substantially midway between the front and rear ends of the heater casing is a circular diifusing bafile or partition in the form of a plate 43 having a suitable number of apertures 45 therein and centrally apertured as at 46. Aperture 46 is sufficiently large to clear the lower end of the muffler and the size of the aperture determines the position that the partition plate assumes upon the muflier. It is mounted thereon by a drive fit. Partition plate includes the conical flange 44 and said flange serves as a support midway between the ends of the casing and for the same. Suitably secured to the forward end of the casing and herein the upper half thereof, are a pair of longitudinal dividing and deflecting partition plates 41 and secured to the casing by the flange portions 42 (see Fig. 3). The air admitted through intake 31 passes along the lower portion of the heater casing toward the baffle 43 beneath the bafile 41 and since baflie 41 terminates ahead of baffle 43 a part of the air passes upwardly and thence forwardly toward the front endof the heater casing to discharge outwardly from discharge 29. The remainder of the air (and the effective baffling area determines the proportion passing through the bafile), passes jrearwardly through the heater casing in surrounding relation to the mufller and outwardly through the discharge 32. Thus, the mufller is adapted to supply heated air to the front and rear compartments 17 and 21, respectively and substantially air tight joints are obtained by the clamping constructions employed. At least the leakage is of relatively minor amount.

The invention shown in Figs. 4 and 5 includes a frusto conical heater casing 130 simfl ilar to heater casing 30 and in this form of the invention the intermediate or transverse bafile is omitted. The intake 131 is at one end of the heater casing and the discharge is a

compound discharge

129 and 132 which has a common opening 200 at the upper rear end of the heater. The two portions or sec tions of the conical heater casing have longitudinal flanges 133 extended to constitute a butt joint and receive the clamping constructions in the form of bolts 137 and nuts 138. The front and rear ends of the heater are closed upon the junction of the muffler with its bell-shaped intake and outlet 13 and 15, respectively, said casing having the central aperture 149 at its forward end and a similar aperture 150 at its rearward end.

The length of air passage through the heater casing in the form of the invention shown in Figs. 4 and 5 is from the front end to the rear, or substantially the length of said casing. The air passing through opening 200 is divided and passes through V the discharge outlet to the several conduits.

The air passing into the heater casing in the form of the invention shown in Figs. 2 and 3, by way of intake 31, passes to the partition 43 and that part which passes therethrough passes outwardly through the discharge 32 and thus the length of air passage is substantially the full length of the heater casing. Similarly, that portion of the air which is deflected forwardly and upwardly and passes out of discharge 29 also traverses a length of passage substantially equal to the full length of the casing.

In the type of heater having an outlet at either end as shown in Figs. 1, 2 and 3 it is desirable that the air leaving the two outlets be heated to approximately the same temperature. It is, therefore, desirable that the air supplied to the two outlets pass over the heating surface at approximately the same velocity with the air to the outlet at the hottest end of the mufller travelling at a slightly higher rate of speed. If the heater casing is made cylindrical, the area open to flow of gas to the rear outlet 32 is so much larger than that open to flow of gas to the front outlet 29 that the air to the rear outlet travels at a much slower rate than that to the front and is, therefore, heated to a higher temperature. The provision of a conical heater casing reduces the area of flow tothe rear outlet and hence tends'to equalize the rates of flow of air. The equalization of rates of flow is not complete however since the entire area within the casing is open to rearward flow while only the ,upper half is open to forward flow. Since the forward end of the mufiler receives the hot gases direct from the engine. it is heated to a higher temperature than the rearward end and, therefore, tends to equalize the eflect of the unequal rates of ow. It has been found that substantially equal discharge temperatures are obtained when the heater casing substantially parallels the mufiier casing.

The invention claimed is:

1. In combination with a conical mufller, a heater casing surrounding the same, an air inlet for said casing, and an air outlet at each end of said casing, said casing being shaped with a smaller diameter adjacent the smaller end of said muffler and having a substantially longitudinal partition in the end thereof adjacent the larger end of said muflier for reducing the cross sectional area of the path of flow to the outlet at that end whereby delivery of air at a substantially equal temperature from both of said outlets is secured.

2. In combination with a conical muffler, a heater casing surrounding the same, an air inlet for said casing, and an air outlet at each end of said casing, said casing being conical in shape, coaxial with said mufiier and having a substantially longitudinal partition in the end thereof adjacent the larger end of said mufller for reducing the cross sectional area of the path of flow to the outlet at that end whereby delivery of air at a substantially equal temperature from both of said outlets is secured.

- 3. In combination with a muffler, a heater casing surrounding the same, an air inlet for said casing, and an air outlet at each end of said casing, said casing being shaped to provide a path of flow of less cross section to the outlet at the hotter end of the mufiier' than to the oulet at the cooler end of the mufiler, whereby delivery of air at a substantially equal tem erature from both of said outlets is secured I In witness whereof, I have.hereunto afiixed my signature.

- QUINTIN G. NOBLITT