US637078A - Ice-cream freezer. - Google Patents

Description

No. 637,078. Patented Nov. 14,1899. F. P. BURR.

ICE CREAM FREEZER.

(Application filed Dec. 29, was. (N o M o d e I x lily a a I W/ TNESSES INVENTOI? V By W ATTORNEYS UNITED STATES v PATENT OFFICE.

FREDERICK PIERC BURR, OF MIDDLETOWN, CONNECTICUT.

ICE- RE F EEzEFi.

SPECIFICATION forming we of Letters Patent No. 637,078, dated. November 14, 1899. Application filed December 29, i898. Serial No. 700,631. (No model.)

; ed a new and Improved Ice-Cream Freezer,

of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved ice-cream freezer which is simple and durable in constructiomvery effective and economical in operation, and arranged to require but a slight effort on the part of the operator to bring the matter to be frozen to the desired condition in a very short time.

Theinvention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement on the line 1 l in Fig. 2. Fig. 2 is a plan view of the same with part broken out. Fig. 3 is an enlarged sectional side elevation of the upper bearing for the receptacle, and Fig. 4 is a like view of the bottom bearing for the receptacle.

The improved ice-Cream freezer is provided with a vessel A in the shape of a pail .or the like, supporting on its bottom a step B, engaged by a bearing B on the under side of the bottom of the receptacle 0, preferably in the form of a can, having a removable cover C. The said cover has fixed on its upper surface apulley 0 formed with an upper flange 0 and a central bearing 0 the latter being adapted for engagement with a pin D, secured to the cover or bridge A for the vessel A, said cover or bridge being removably secured to said vessel by suitable fastening devices E. The flange O of the pulley C fits into a recess A 011 the under side of the cover or bridge A, and a cord, band, chain, or like flexible strip F is secured to the pulley and is adapted to wind on and unwind from the latter. This flexible strip F is secured at its inner end to said pulley, and after winding around the same extends through a guideway A to the outside of the vessel A, and is proposite direction to the last.

Vided at its outer end with a handle F, preferably in the form of a ring adapted to be taken hold of by the operator. It will be seen that the uppersurface of the can-cover 0 forms practically a lower flange for the pulley, the strip F being thereby guided between the flange C and the said upper surface of the cover. It is evident that when a pull is exerted on the ring F and the strip F a rotary motion is given to the pulley G the cap 0, and the receptacle 0, so that the strip F unwinds, and as the receptacle keeps on rotating the strip is again wound upon the pulley, but in a reverse direction, and when the receptacle finally comes to a standstill at the time the strip F is nearly wound up then another pull is given to the strip by the operator pulling the handle F a second time, so that the receptacle is again rotated, but in an opposite direction. The strip F again unwinds and is rewound in an opposite direction to the last winding, so that when the next pull is exerted on the strip a rotary motion is again imparted to the receptacle 0 in the op- Thus it will be seen that by the consecutive pulls given to the strip F the receptacle 0 is alternately rotated in opposite directions.

In the vessel A is arranged a perforate guard G in the form of wire-netting, separated at its lower end to form outwardly-extending feet G for supporting the guard on the bottom of the vessel A. The guard G fits snugly to the external surface of the receptacle O,Without, however, touching the latter, the guard serving to keep the ice H in the vessel between the wall thereof and the guard.

from coming in Contact with the revoluble receptacle C. The freezing or saline liquid mixture H can readily pass through the meshes of the guardG and come in Contact with the external surface of the receptacle 0.

The operation is as follows: When the receptacle O is filled with the matter to be frozen and the ice H, with the freezing mixture H, is placed into the vessel A, as described, and the said receptacle is rotated alternately in opposite directions, then the liquid matter within the receptacle is caused to travel in the receptacle and to flow up on the innerwall thereof to form a hollow center, and at the same time the liquid freezing mixtoo ture H is caused to travel in the vessel A and to move up on the external surface of the said receptacle to insure a thorough cooling and final freezing of the contents of the receptacle, it being understood that the freezing mixture is several degrees colder than the ice, and consequently a rapid freezing of the contents of the receptacle takes place, especially as but a thin layer of the liquid matter within the receptacleis opposite the layer of freezing mixture on the outside of said receptacle.

It is understood that by rapidly changing the direction of the rotation of the receptacle, its contents, and the freezing mixture H,

the contents, as well as the freezing mixture, are constantly agitated to cause a very quick freezing of the contents of the receptacle. As the freezing mixture H is agitated it searches through the ice,, thereby causing a rapid melting of the ice and a consequent taking up of heat to insure a very quick freezing of the contents of the receptacle. As the contents of the receptacle 0 revolve with the receptacle and as the receptacle is not hindered in any way in its rotary motion during the freezing operation, it is evident that very little power is required from the beginning to the end 'of the operation. Thus the freezer works just as easily at the beginning of the operation as when the contents of the receptacle O are frozen harder than the ice.

As the can has a tight-fitting cover, when the cover is in place there is no opening through which the saline solution can gain access to the interiorof the can and spoil the contents, and also the contents of the can will not escape if the can is rolled about or upset.

As the contents of can 0 have a rapid centrifugal motion, as well as a pulsating upand-down motion, which motions are instantly reversed at very short intervals by the ever-reversing motions of the can, the contents of the can are in a state of elfervescence until solidified. Consequently no scraper or agitator is required. Without this reverse motion and with the centrifugal force exerted constantly in one direction the more solid or creamy part of the contents of the can would seek the periphery, while the watery or more fluid portion would take the center, and consequently make a mixer or scraper necessary for freezing a uniform cream or ice.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent An ice-cream freezer, comprising a receptacle for the freezing medium, a reticulated cylindrical guard in said receptacle having its lower end separated and bent outwardly whereby to form supporting-feet, the freezing medium being adapted to be placed between said guard and the walls of the receptacle, a can mounted to turn in said receptacle and within the guard, being close to but spaced from the latter, a closed cover tightly held on the said can and having a pulley rigidly secured to its upper face, the said pulley being provided with an upper flange and a central recess, a flexible strip adapted to wind on and unwind from said pulley, and a bridge detachably secured to said receptacle and extending across the top thereof, the said bridge being provided with a pin adapted to enter the recess in the pulley, as and for the purpose set forth.

FREDERICK PIEROE BURR.

Witnesses:

ELISHA T. SAGE, Gno. A. PALMER.

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