US 1466406 A
Description (OCR text may contain errors)
Au 28, 1923. I 1,466,406
' J B. M DONALD v PREHEATEB AND MI-XER Filed Jan. 23, 1922 3wenbot Jack 5. Mafia/Yaw Patented Aug. 28, 1923.
UNITED STATES JACK B. MACDONALD, or OAKLAND, CALIFORNIA.
rnnnna'rnn AND MIXER.
Application filed January 23, 1922. Serial No. 531,030.
To all whomit may concern:
Be it known that I, JACK B. MACDONALD, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Preheaters and Mixers, of which the following is a' specification.
My invention is an improved preheater and mixer for the intake charge of internal combustion engines.
The object of my invention is to'provide a preheater which is inexpensive and efficient in operation, and may be readily attached to any engine without replacing any of the standard equipment.
The preheater is formed in the same shape as the manifold flange and is positioned be tween the intake manifold and the carburetor. Referring to the annexed drawing: Figure 1 is a side ,view of my improved preheater in position, with parts broken away to show details of construction.
Figure 2 is a diagrammatic view of the wiring and electric control.
In the drawing. the numeral 1 indicates my preheater positioned between the intake manifold 2 and the carburetor 3. The outer casting-4 comprises the top and sides of the preheater. An inner casting 5 forms the bottom of the preheater and extends centrally upward to the top and isv flanged in the casting 4. A central bore 6 ofthe casting 5 conforms in size and position to the outlet of the carburetor and the intake manifold.
A plurality of beating paddles 7 are positioned in the bore 6, and are journaled' on a shaft 8 which is secured in spiders 9 and.
10 at the top and bottom respectively of the preheater. Adjacent paddles rotate in on posite directions, and are actuated by the gas passing upward into the intake manifold 2. The gas passing through the bore '6 and engaging the paddles 7 is thoroughly mixed and agitated, and is thrown outwardly against the heated walls of the bore, as will be described.
The central stem of the casting 5 is en-' sistance wire 12 is wound. The resistance wire heats the walls of the bore 6 and thus preheats the gas charge, which gives increased power andflexibility to the engine.
Cap screws 13 and 14 pass through the intake manifold flange, the upper wall of the casting 4, the lower wall of the casting 5 and into the carburetor 3, thus securely and removably joining these members together.
A thermostatic controlled switch 15 is secured to the casting 4, and comprises an expanding metal bar 16, which receives its heat from the walls of the casting 4 and in expanding is adapted to engage one leg 17 of the electric switch, forcing it upwardly to break the contact 18. Current is supplied to the coil 12 from a battery, 20, through lead 21 to a switch 22, lead 23 to the thermostat 15, and lead 24 to the coil.. The coil is grounded through lead 25 on the casting 4. A lead 26 grounds the battery.
Having described my invention, I claim:
1. 'Apreheater and gas mixer comprising an outer casting, an inner casting having a central bore, means for heating said inner casting, and rotatable agitating means in said bore.
2. In combination with a carburetor and an intake manifold, a preheater and mixer comprising an outer casting, an inner casting, said inner casting having a central bore in alignment with the carburetor and manifold, a resistance coil surrounding said bore,
means for automatically controlling the current flowing through said coil, beating paddles journaled in said bore, and means for securing the preheater to the manifold and the carburetor. I
3. In combination with a carburetor and an intake manifold, a preheater and mixer comprising an outer casting and an inner casting, said inner casting having a central bore in alignment with the carburetor and manifold, and a resistance coil wound on said inner casting around the central bore.
4. In combination with a carburetor and an intake manifold, a preheater and mixer,
comprising an outer casting and an inner casting, a'mica jacket surrounding the inner casting, said inner casting having a central bore in alignment with the carburetor and manifold, and a resistance coil wound on said mica jacket around the central'bore.
In testimony whereof I aflix my signature.
I JACK B. MAGDONALD.