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US Patent: 231,168
Drying Kiln
Edward Holmes - Buffalo, NY
Britain Holmes - Buffalo, NY

USPTO Classifications:

Tool Categories:
specialty machines : kilns
trade specific : cooper
woodworking machines : specialty machines : barrel making machines


Not known to have been produced

James Sangster
M. D. Field
E. Hurley
H. Sangster

Patent Dates:
Applied: Apr. 20, 1880
Granted: Aug. 17, 1880

Patent Pictures:
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E. & B. Holmes Machinery Co./ Forgotten Buffalo
E. & B. Holmes Machinery Company Building
E. & B. Holmes Machinery Company / Buffalo Architectural History
"Vintage Machinery" entry for E. & B. Holmes Machinery Co.
James Sangster - patent attorney

The object of the first part of our invention is to produce a continuous rapid circulation of air through the material to be dried and through a thin condensing-space, as will be more clearly hereinafter shown, so as to effect a more thorough and rapid separation of the moisture therefrom, and to prevent the condensing of vapor and the consequent dripping of water within the kiln, which would be again converted into vapor by absorbing more heat therefrom; and it consists of a drying-kiln the sides of which are provided with an outer shell or wall, so as to leave a thin air-space between them, and having a suitable steam-heating device arranged horizontally at the bottom, in combination with a series of cold-water tubes arranged vertically within the said air-space outside of the kiln or drying-chamber, and adapted to any suitable water-forcing device for keeping up a constant current or flow of cold water through the condenser, the inner wall or side of the kiln of said air-space having an opening below to allow the air, after its moisture has been condensed on the cold pipes within it, to pass again into the bottom of the kiln, where it is again heated and passes up through the lumber and kiln, and an opening at the top, through which the air passes, after being again charged with moisture, into the condensing air-space, where it parts with its moisture and passes out, as before. The water on the condenser drips therefrom at the bottom of the air-space into a suitable receptacle, from which it is conducted away. The space in which the condenser is placed, being thin, but having a large area, confines the air within it very close to the cold condensing-tubes, so that it cannot radiate or expand outward from them, as it would if the condenser were placed in the kiln, thereby contracting the cold space without diminishing its area, and causing a more thorough and rapid condensation, as the warm moist air passes through it, than could be otherwise produced, and consequently an increased circulation, the said air-space being outside of the influence of the heat which rises from the kiln. It is obvious that the colder the air is in the condensing-space the more rapid will be its descent through it, and that when warmed after it passes out it will again ascend through the lumber and kiln. The second part of our invention relates to the heating apparatus; and it consists in a peculiar arrangement of the steam-coils at the bottom of the kiln, as will be more clearly hereinafter shown.

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