US 2419575 A
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April 29, 1947.
B. LEONARD HEATER Filed March '5, .1945
INVENTOR- amw LEONARD A TTORNEYS Patented Apr. 29, 1947 UNITED STATES PATENT OFFICE HEATER I Byram Leonard, Eldorat loJOhio Application March 5, 1945,:sr1a1 N4. Lsi,no
' 3 Claims. (01. est-2 40f) (Granted under the act ornate; s, 1883, as amended April 30, 1928;370 0. G. 757) The invention described herein may be manufactured and used by orfor the Government for governmental purposes, without the payment to me of any royalty thereon.
This invention relates generally to heaters and more particularly to water heaters for a vehicle used in combination with a combustion engine.
All devices of this character, made according to the teachings of the prior art, and with which I am familiar, have provided no means for utilizing the heat in the exhaust gases with any degree of efiiciency. Heretofore, any heating system used with the exhaust gases has produced excessive back pressure on the exhaust system which caused engine valve trouble. The cost of these prior systems has been prohibitive,
It is, accordingly, an object of my invention to overcome the above and other defects in hot water heating boilers for vehicles utilizing the exhaust gases Of an internal combustion engine and it is more particularly an objector my invention to provide a hot water heating boiler which is simple in construction, efficient in operation, easy to install, and economical in cost.
Another object of my invention is to provide a hot water heating boiler in which a maximum of heat is extracted from the exhaust gases before being passed to a muflier or other device after it leaves the boiler.
Another object of my invention is to provide novel means for reversing the fiow of gases in a water heater.
Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawing, in which:
Figure 1 is a perspective view of my hot Water heating boiler;
Figure 2 is a perspective view of the inner shell of my novel hot water heating boiler;
Figure 3 is a diagrammatic view showing the direction of flow of gases through the tubes.
Referring now to the drawing, Figures 1, 2 and 3 show a series of tubes I disposed in vertical alignment and in horizontal alignment rolled into tube sheets 2 and 3 on the ends thereof, Threaded stud bolts 4 extend outwardly from the tube sheets 2 and 3 to secure box-like members 5 and 6 to the sheets 2 and 3 by means of threaded nuts I. An inlet tube 8 extends into a chamber formed by the box-like member 5 and is disposed in the extreme upper left hand corner in order to provide better distribution of the gases in passing through the first bank of tubes I. An outlet 9 is disposed in the lower right hand corner of the box-like member 6 andleads to a muffler (not shown). A water inlet and outlet I0 and II; is shown extending from the top of an outer shell I2 surrounding the tubes I. Inlet and outlet I0 and I I lead to a heating system (not shown) disposed in a vehicle. A drain I5 is provided for draining the closed container formed by the tube sheets 2 and 3 and the outer shell I2,
Tube sheet 2 has welded thereto a baflle member I 3 which divides the first vertical row of tubes I and the second two vertical rows of tubes I. A
baflle I4 extending from tube sheet 3 divides the first two vertical rows of tubes and the third row of tubes,
In operation, the exhaust gases from the exhaust manifold of an engine (not shown) pass to the inlet tube 8 and to the first vertical row of tubes I and reverses itself through the second row of tubes I because of the bafile I 4 and again reverses itself in the third row of tubes as shown in Fig. 3 because of baffle I3 and then passes through outlet 9 to a mufller (not shown) with a minimum amount of back pressure resulting.
In my novel boiler there is no danger from monoxide gas since exhaust gases are carried away from the vehicle and more complete combustion occurs. The operating efficiency of the engine is not impaired in that the area of the boiler tubes is greater than the area of the exhaust pipes.
It will be evident from the foregoing that I have provided a novel water heater which may be used in conjunction with an internal combustion engine utilizing the exhaust gases therefrom to heat water with a maximum of efliclency and a minimum of back pressure set up. My novel heater may be insulated.
Various changes may be made in the specific embodiment of my invention without departing from the spirit thereof or from the scope of the appended claims.
What I claim is:
1. A water heater for vehicles adapted to utilize the exhaust gases from an internal combustion engine, comprising an elongated shell, tube sheets in said shell spaced from the ends thereof and forming with the walls of the shell a chamber at each end of the shell and an elongated liquidtight compartment between said sheets, a plurality of rows of equally spaced vertically and horizontally aligned tubes carried by said tube sheets and extending through said compartment with their ends opening into said chambers, a vertical baflle in each of said chambers between the tube sheets and the walls of the shell vertically comprising an elongated shell, tube sheetsat each end of the shell and closing the ends of said shell and forming an elongated watertight compartment between said sheets, vertically and'horizontally aligned gas tubes carried by said tube sheets and extending through said compartment with their ends opening through said sheets; box-like members disposed on the tube sheets and forming alchamberhateach end of the sh'elL vertical baffle plateslinthe chamber and so positioned relative tolrthe-op'en' ends of thetubesas to reverse-the fiow-of'gas through said tubes, a gas inlet'opening 4 at one end of the heater in substantial alignment with the uppermost tube in the first row of tubes, and a gas outlet opening at the other end of the heater in substantial alignment with the lowermost tube in the last row of tubes.
3. The invention of claim 2 characterized in that thetube sheets areprovided with threaded bolts cooperating with holes in :the box like members, and nuts, whereby a gas and watertight connection may be effected between the tube sheets, shell, and box-like members.
REFERENCES CITED The following references are of record in the file ofthis patent:
UNITED STATES PATENTS Number Name Date 667,809 Taege Feb. 12, 1901 817,458 Wheeler et a1. .Apr 10,1906
2,065,708 Keirle Dec.':29 1936 1,057,485- Knollmann Apr. 1,- 1913 1,414,751 Rumery et a1, May 2,1922