US436309A - Ice-cream freezer - Google Patents

Description

(No Model) J. G'. PALLS.

ICE GREAM PRBBZER.

No. 436.309. Patented-se t; 9, 1890. v

'IJV VENTOR I WITJVESES &WM 06) .dttorney UNITED .STATES PATENT OFFICE.`

JESSE GILBRETH FALLS, OF MEMPHIS, TENNESSEE.

ICE CREAM FRETEZERT.

SPECIFCATION forming part of Letters Patent No. 436309, dated September 9, 1890.

Application filed July 5, 1890. Serial No. 35'7,857. (No model.)

To aZ whom it may concern:

Be it known that I, J ESSE GILBRETH FALLs,

a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented certain new and useful Improvenents in Refrigerators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the I same.

My invention relates to inprovements in refrigerators ot' the class known as revolving cylinder ice-cream freezersg and it consists in various details of Construction whereby I am enabled to eifect the freezing more rapidly and economically than has heretofore been accomplished.

The objects of my invention are to supply a machine compact in form, inexpensive to manufacture and operate, and which will enable any person possessed of the requisite materials to prepare ice-cream, frozen custard, sherbet, dac., Without delay, such as is involved in the manipulation of an ordinary ice-Cream freezer, and with very little effort or labor; to make a machine especially adapted to the use of families and small parties, where rapid action and little preliminary trouble in making preparations would be considered the most Valuable features of the device. These objects I attain by means of the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the machine with the side of the case partly broken away to show the parts within. Fig. 2 is an end elevation With a portion of the case removed to show the cylinder and scraper. Fig. 3 is a reverse side elevation showing the drive-gear ing. Fig. 4 is a plan with the cover of the case removed. Fig. 5 is a perspective view of the scraper.

The cylinder A is made of sheet metal and is intended to hold the refrigerating mixture of ice and salt, dac., which is introduced through the opening c until the cylinder is substantially filled. It is supported on suitable journals b b', resting in bearings in the sides of the case B, and is rotated by means of a gear-wheel C, journaled in the lower or bottom half of the case and actuated by a `crank c', as best shown in Figs. 3 and 4. The

materiaLto be frozen is poured into the pan D, which is for convenience in this operation partially withdrawn through the open end of the' case, and after being filled is returned to the position shown. I am' thus enabled to dspensewith a funnel for introd ucing the material and to avoid an opening in the case. The device is best operatedby setting it upon a table with the open end projecting slightly over the edge thereof, and the material removed by the scraper is caught in a vessel held on the knees of the operator, or the pan D maybe partiallywithdrawn through the case so that the frozen material will fall back into it as it is removed by the scraper.

The operation is as follows: The cover of the case is taken off and the cylinder removed from the case, the cap unscrewed and the cylinder filled with crushed ice and common salt,

the cap replaced and tightly screwed up and the cylinder carefully freed from all traces of salt which may have adhered to its surface, and is then replaced in the case, the cover secured and door G closed. In this condition it can be kept in readness for instant use, and the ice unmelted for several hours. In using, the door G is raised and Secured, the pan D partially drawn out through the open end of the case, the cream or other material introduced, and the cylinder slowly rotated by turning the crank, the Cream at once freezing in a layer on the surface of the cylinder, and is removed by the scraper E, falling into the receptacle provided for the purpose, as heretofore explained. in position by wire springs e, fixed in the end of the case, one of these being shown in Fig. 1. These springs are independent of each other, and their inturned ends e' take into lugs on the sides of the scraper and press its sharp edge against the cylinder, and its down- The scraper E is held wardlyv-extending side pieces against the end 5 of the bottom of the case, so that it is yieldingly pressed against the face of the cylinder and readily detachable when the cylinder is removed from the case, Whence it results that all parts may be easily removed for the pur- IOO pose of cleansing them. The side extensions of the scraper are separated, so that the pan can be withdrawn between them, and the space below the scraper and above the pan is such that the operator can while at work inspect the pan and see when the contents require renewal or when the process is completed. The door Gr, hinged to the end of the case, is to be kept closed when the machine is not in use, and is fitted over the scraper and springs, so as to form a close joint. The cover is also made to fit closely, so that there are no openings to admit air when the device is not being used.

The bottom of the case is shorter than the sides and top thereof,tl1us giving the sera-per a Vertical position nearly tangential to the cylinder. By this Construction. I avoid the troublesome clinging of masses of frozen material to the scraper, as results when the latter is inclined, and the material falls freely, clear of` all parts of the machine, into the receptacle provided for the purpose.

The gear-wheel' C and journal b' will preferably be cast in one piece, and I propose making it of brass or Zinc, so that t can be soldered directly to the side of the cylinder; but it may be made of cast-iron and galvanzed and soldered or riveted to the cylinder. The journal b may in like manner be made space between the arms of the scraper and adapted to being part-iall y Withdrawn through said space, as and for the purpose specified.

3. In a refrigerator of the character described, the scraper having the lug-bearings, in combination with the springs, whereby the scraper is removably held in place against the cylinder, as shown and described.

In testinony whereof I affix my signature in presence of two witnesses.

JESSE GILBRETH FALLS.

lVitnesses:

J. M. POLLARI), M. A. AUSTIN.

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