US2159450A - Frozen cream machine - Google Patents

Description

May 23, 1939. J, PARCELL ERozEN CREAM MACHINE Filed Dec. 2, 1956. 2 Sheets-Sheet l May 23, 1939' J. PARcELL l FROZEN CREAM MACHINE Filed Dec. 2, 1936 2 Sheets-Sheet 2 L ma my. mm Mm i www I. N E ,NH/WA m w Ww u .W m

f PatentedL May 23, 1939 PATENT- orricla:

2,159,450 FRolzEN CREAM MACHINE i 'Y y John Parcell, New York, N. Y.

A,Application December 2, 1936, Serial No. 113,883

' 5 claims. y (c1.l A25a-66) This inventionconcerns thev machinetor apparatus for manufacturing ice cream,; frozen .custards or the like.

In .the pastv machines and apparatus of this 5 kind, when serving to prepare larger quantities of frozen produce, have been extremely unwieldy and heavy inr weight, since they are called upon to answer very stringent hygienic -requirements, since they have `to be` Well'insulated in order to yieldthermal eiciency, and since they have to beruggedand strong in order to'stand the strain of a continuous slow drive by .a.motor. l.

It hasbeen the object of athis invention to improve upon maohinesor apparatus ofthe kind in question, reducingtheir .volumeon one hand, and their kweight onthe otherhand, -so that they can be readily transferred from one location tov another, do Inot. require much room, and even may beset upon counters,y or the like, as it may be desired. y l

In spite of such improved departurethe apparatus or machine of my invention even exceeds apparatus of theY prior art in respect to hygiene, thermal efliciency, stability, durability, compactness and mechanical strength.A

Some of the objects concern various improvements of the mixer or rotorwhich serves to agitatethe mixture to be frozen, so that it may be evenly frozen.v Still other objects concern the arrangement ofthe freezing compartment proper, the' cooling chamber, themotor compartmentand the saidchambers vand compartments in` combination with peach; other, as itfwill be better understood from the following exemplary descriptionA in thel lighty of the accompanying drawings, inl which l Fig. 1 is an elevation of a partly sectionedaway and partly cross-sectioned apparatus or machine of my invention in a partly schematic ,m presentation. y

Fig. 2 shows a modification of the stirrer or rotor of the device lof myinvention.

Fig. 3 shows a detail in a sectioned top view, this section being taken in Fig. 2 indicated b an arrow and the numeral 3. i

Similar numerals refer to similar parts throughout the various views.k i i In the cross-section to the right of Fig. 1, we nd'numerous applications of heavy sheet metal 5f, or tubing, or'the like, which are all shown in solid heavy black elevation and cross-section.

In order further to facilitate the understanding of the drawings, sheet materials are not shown in abutment where they are welded or'soldered together, but they are shown slightly spaced apart, :and the letters W and S indicate in connection with points, where the sheet materials 'are sealedly interconnected, a welded or soldered joint respectively, in a preferred execution of the instant invention.

The base II of the apparatus of Fig. l has the shape of an inverted bell and may preferably be stamped or spun in heavy sheet material. The lower edge thereof is reenforced by a seam beaded around a reenforcing rod I2.

Near the top of the base II various contracted steps, like I3 and I4, coact in facilitating the concentricarrangement of the apparatus.

kvThe top shelf I5 of the base is perforated where necessary for interconnecting the top and bottomeof the apparatus, e. g., for the bearing I6 surroundingl the shaft I1 interconnecting the motor 22 with vthe stirrer, mixer or rotor 23 in the freezing compartment 24; or the intake of conduit I8 serving for the discharge of the frozen .L

produce,V through opening 25 in the side of the base II, to a valve 26 at the one end of the said conduit I8; or the waste pipe I9, which is opened or closed-by a handle 2U rotatably extending throughthe sides of the base II, said waste pipe serving to drain the cooling compartment 21 which cylindrically surrounds the freezing compartment 24; or there are perforations for means assembling thetop part with the base of the apparatus. soldered onto the bottom 38 of the cooling compartment 21, their threaded ends extend through clearance openings in top I5, and are secured from below upon the base by nuts 28.

The freezing compartment 24 comprises the following parts:

The convex bottom 29 of the freezing compartment 24 is suitably perforated to allow the shaft I'I to interconnect therethrough, and also in order to ,permit discharge into the elbow 3I of the conduit I8, which by way of a nipple 32 anda coupling 33 connects with the dispensing valve 26. The elbow 3| and the bearing I B are shown in the drawings to be executed in one unit, whichis suitably attached by way of a gasket 30 to theconvex bottom 29 of the freezing compartment. f

The convex bottom 29 is sealed to the cylindrical shell 34 of the freezing compartment 24, `an overlapping seam being shown for the purpose, and vi'tmayfbe reenforced by welding, as indicated,'in order to provide'a permanent seal.

A skirted. cover 35 fits snugly over the top of the shell 34, and bolts 36'are suitably fastened pppn shelly 34,by rivets for instance, and ex- The heads of bolts 2I are for instance Lio' tend through clearance openings in the cover 35, so that the wing nuts 31 may be applied to the top of said bolts 36, and screw the cover 35 down tightly onto the can or shell 34 of the freezing compartment 24.

An annular disc 38 is the bottom for the cooling compartment 21, which serves to receive the freezing mixture, e. g., ice. The inner circle of the bottom 38 is flared up into the beaded rim extending down from the freezing compartment 24, and is shown to be connected thereto by soldering. In order to reenforce the freezing compartment 24 in its upright position, I may provide at suitable angular distance the braces 38, which are indicated in the drawings toy be sol--V dered to the outside of the freezing compartment 24, as well as to the bottom 38 of the cooling compartment 21, thus rendering the freezing compartment 24 very stable.

The outer rim of the bottom 38 of the cooling compartment 21 is turned down in ring fashion and engages in and is soldered into a fold 4| at the lower end of the cylindrical outer wall 4.8 of the cooling compartment 21.

The said soldered fold 4| at the bottom of the outer wall 48 of the cooling compartment 21 snugly fits over the top step I4 of the; space II, and concentrically aligns the cooling as well as freezing compartment upon the base. sulating material 42 may be placed between the bottom 38 of the cooling compartment 21 and the top shelf I5 of base Il, in order to prevent dissipation of heat from the base into the cooling and freezing compartments, and the bolts 2| clamp the cooling and freezing compartment onto the base, so that the whole becomes a very stable unit.

The second step I3 at the'bottom of the base |I fits into an outer shell 43, which cylindrically arises to substantially the same level as thewall I4. Insulating material 44 is accommodated between the said shell and wall for purposes of preventing the entry of heat from the outside upon the inner compartments. The outer shell 43 is suitably fastened upon the step I3, short screws 45 being for instance indicated for that purpose. This does not have to be a tight seal; except, of course, that the insulating material 44 should not fall out at the bottom.

A U-shaped inverted channel 48 extends in a circle at the top and gathers together the upper rims of the wall 48 and the shell 43. Said upper rims may be suitably spaced apart by wooden spacing lugs 41; and thin bolts 48 extend across the inverted channel 48 and hold the upper ends of the wall and shell, andthe channel 48 together.

Over this outer insulating wall formed by the parts 40, 43 and 48 loosely extends a cover 48 with a suitable handle 58 at the center thereof.

'I'he bottom of base |I isfurther reenforced by a webbed frame 5I which extends thereacross and may be attached thereto triangularly for instance, one of the connecting legsor legs 52 being indicated at the lower right; suitable cushions 53 may 'extend from the triangular extremities of the web 5|, giving to the apparat-us or machine the convenience of a 3-point support.

The web frame 5I serves to suppQrt the driving motor 22V which may be an electrical motor with a terminal board indicated at 54. 'Ihe said motor 22 in turn supports, andthe frame 5| may also supporty the reducing unit 55,110 the shaft I1 of which the power of motor 22 is transmitted at a reduced' speed', said shaftbeing ariranged vertically. Shaft I1 is extended as an extension 56 substantially throughout the whole height of the freezing compartment 24, and is superimposed by a square as a key at its upper end 51. A sleeve 58 protectively surrounds the extension 56 and may be soldered and/or pipethreaded into the bearing I6 as indicated. It will be'l noticed that if the mixer or rotor 23 is lifted out of the freezing compartment 24, the sleeve 58 still protectively surrounds substantially the whole extent of extension 26 so that the contents of the freezing compartment 24 can never reach the shaft 56. The upper end of the sleeve 58 is closed in and flts slidably over the upper end of extension 56, so as to provide a closure and to prevent splashing of the contents of the freezing compartment ontoI the extension.

The mixer or rotor comprises the hollow sleeve 68 which is closed at its upper end and fits over the square keyv 51 of the extension 56, so that it is rotatably engaged by said key and will be rotated when motor 22 isv in operation.

A scraper arm 63 extends laterallyv out from one side of the sleeve 68 and serves to scrape the'bottom 28 of thev freezing compartment. A helix 6|v extends. around the sleeve 68, and is spacedly provided with lugs 65. These lugsI pivotally supporting the Scrapers 64 which engage upon the wall 34 of the freezing compartment 24.

The sleeve 68 may beA retained in concentric alignment in the apparatus by providing at the lower end, thereof, upon the inside, a bearing 66, which engages upon the outside of a neck 61 extending upv from the bearing I6. Below the neck 61v I show a horizontal shoulder 68 on the bearing I6 which thrustwise supports the mixer or rotor 23.

The closed upper end 63 of the sleeve 68 may extend through` the cover 35 and may there be concentrically supported by a cap 18 which is fastened upon the cover 35.

Instead of engaging the mixer at the top by Way ofI an extension, shaft I6 may also engage directly upon the mixer at the bottom thereof, as illustrated in Fig. 2. Under these circumstances, the shaft I6 extends by Way of a stuffing box represented by a stufling nut 15 and packing material 1=6 through a bearing I6. A key formation on the shaft I6 extending as a stub into the freezing compartment, is indicated by way of a pin 11; inserted transversely through that top end of shaft I6, and thelower end 18 of the mixer 19 is shaped to engage upon said key.

A dowel or center 88 rotatably supports the upper end of the mixer 19 and may be fastened byway of a fla-nge 8|; provided upon such dowel or center, and by wayI of a threaded extension above and thev nut 82, upon the cover 35 of the freezing container. The helix 83 maybe integral with the arbor`v 85 of' the mixer, as shown, and may interconnect at the bottom with the bottom scraper 84j, as'indicateda The side Scrapers 86 may be-made of suitable sheet material and are for-instance provided with a bead 81 on'one side, said bead 81 accommodating a vertical shaft 88; The beaded portion of the side Scrapers-may beslotted at suitable points 83, where upper lugs 9|l'andA lower lugs 9 I hinged.- 1y engage uponr the shaft 88 so that the side scrapers may swing to and fro thereon.

'I he lugs, e g.,l 9`I form suitable extensions ofthe helix 83 as shown in the cross-section of Fig. 3; We also take from this cross-section that in the loWerlugs 9|h I' prefer to provide slots 92,

Yinstead of holes, for the shaft 88 or whatever the swivels may be, so that there is some play and the side scrapers during rotation may be pressed further out or less out at their bottom ends than Vat their top ends where they are oscillatably hinged upon the lugs 90. Flat springs 93 mounted upon the lugs 9| may assist in pressing the side Scrapers 86 into engagement with the side walls of the freezing compartment.

Although I have shown and described my invention in detail, yet I do not wish to be limited thereby, except las the state of the art and the appended claims may require, for it is obvious that various modifications and changes may be made in the form of embodiment of my invention, without departing from the spirit and scope thereof.

, What I claim is:

l. In a freezing apparatus, acircular base with a plurality of steps near the top thereof, a circular cooling compartment with a fold extending as a rim from the bottom thereof and fitting over one of said steps, a freezing compartment assembled with and centrally arising in said cooling department, and a circular shell fitting over another one of said steps and forming an insulating compartment around said cooling compartment.

2. In a freezing apparatus, a circular base with a plurality of steps near the top thereof, a circular cooling compartment with a fold extending as a rim from the bottom thereof and fitting over one of Said steps, a freezing compartment assembled with and centrally arising in said cooling'department, a circular shell fitting over another one of said steps and forming an insulating compartment around said cooling compartment, and an inverted channel engaged over the top of said cooling compartment and said shell, engaging them together and upwardly closing said insulating compartment.

3. In a freezing apparatus, a circular, inverted bell-Shaped base, a motor mounted in said base, a vertical shaft centrally arranged in said base and driven by said motor, a step on said base in concentricity with said shaft, a circular freezing and cooling unit adapted to receive a freezing mixture and having a protruding circular bottom rim, and a mixer in Said unit driven by said shaft and shaped near its top to engage upon said shaft, a sleeve stationarily mounted in said unit and arising between said shaft and said mixer, said bottom rim on said unit tting onto and around said step, so that said base and unit are concentrically aligned for a concentric drive of said mixer.

4. In a freezing apparatus, a mixer, side Scrapers, lugs on said mixer, and swivels supporting said Scrapers on said lugs, some of said swivels allowing a play transverse to the plane of said Scrapers in addition to oscillating play of said Scrapers on a group of said lugs, in order to facilitate angular adjustment of the Scrapers relatively to their vertical extent.

5. In a freezing apparatus, a mixer, side Scrapers, lugs on said mixer, swivels supporting said Scrapers on said lugs, some of said swivels allowing a play transverse to the plane of said scrapers in addition to oscillating play of said Scrapers on a group of said lugs in order to facilitate angular adjustment of the Scrapers relatively to their vertical extent, and tension means on said group of lugs pressing said scrapers substantially centrifugally out.

JOHN PARCELL.

Cil

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