File:Appletons' cyclopaedia of applied mechanics- a dictionary of mechanical engineering and the mechanical arts (1880) (14593446038).jpg

Identifier: appletonscyclopa02dapp (find matches)
Title: Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts
Year: 1880 (1880s)
Authors: D. Appleton and Company Benjamin, Park, 1849-1922
Subjects: Mechanical engineering -- Dictionaries
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University

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pentry. HULLERS, COFFEE AND RICE. Coffee Hullers are machines for removing the husk or hullfrom coffee grains. Browns Huller.—In the apparatus constructed by Messrs. W. A. Brown & Co., of Lynn, Mass.,represented in Fig. 2329 a, the hulling is accomplished by drawing the grains on an endless chain orapron consisting of a series of corrugated iron pads, which are made to pass underneath a series ofsteel keys or fingers held in place by coiled steel springs, causing them to adjust themselves to thesize of the beans which pass under them, so that a small bean cannot pass through unhulled and alarge bean passes through unbroken; thus hulling both small and large beans. The coffee and thehulls fall from the hulling plates, or pads, on to a set of sieves, which are so arranged that they arecontinually in motion and keep the hulls and coffee in line of the current of air produced by the fanwhich is located in the front part of the machine, and is arranged so as to blow out the hulls and
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allow the coffee to fall through the sieves on the chute, which conducts it into the receptacle placedto receive it. The coffee being free from hulls, it is necessary to give it a thorough cleaning and polishing,thereby removing the fine silver skin which closely adheres to the beans. An improved device forthis purpose by the above-named makers consists of a heavy perforated brass cylinder arrangedhorizontally in a heavy wooden frame. Through the cylinder passes a shaft on which are a numberof hard-wood floats. The shaft rotates at the rate of about 100 revolutions per minute. By meansof the floats the coffee is thoroughly agitated, and thus cleaned and polished. Guardiolas Huller.—The coffee-hulling and polishing machine devised by Sr. Jose Guardiola, ofGuatemala, consists essentially of a mortar and pestle, the construction being such that the coffee iscleaned and polished by the friction of one grain against the other moving in the broken chaff. Thepestle is a sieve having on its

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