US1490786A - Ice-cream freezer - Google Patents

Description

April 15 1924.

M. A, ROLLMAN ICE CREAM. FREEZER Filed Sept. 9 1921 2 Shets-Sheet l April 15, 1924. .1,490,786

M. .AL RoLLMAN /AI gill 2 Sheets-Sheet 2 @Manuf-L Patented Apr. 1S, 1924.

Stans FFC.

a'rar MICHAEL A. ROLLMAN, OF MOUNT JOY, PENNSYLVANIA.

ICE-CREAM FREEZER.

Application filed September 9, 1921. Serial No. 499,494.

and a resident of Mount Joy, county of Lancaster, and State of Pennsylvania, have in-' vented certain new and useful Improvements in lce-Cream Freezers, of which the follow* ing is a full and clear specification.

This invention has particular reference to l0 that class of ice-cream freezers in which a manually-operable gearing is arranged so as to drive the cream-can in one direction and rotate the dasher in the other direction, and the objects of my invention are to simplify and cheapen the manufacturing costs of the freezer as well as to render it more efficient in quickly freezing the cream, as more fully hereinafter set forth.

In the drawing 2U Fig. 1 is a vertical sectional View sho-wing a freezer embodying my invention;

Figs. 2 and 3 are detail views hereinafter described; l

Fig. 4 is a view partly in section and partly in plan of the freezer;

Fig. 5 is a vertical sectional view of the gearing and the dasher; f

Fig. 6 is a perspective view of the dasher; Fig. 7 is a plan view of a part of one of the horizontal gears. v

One of the features of this invention is a device for anchoring the ice-tub or pail to a table or other support. For this purpose, l fasten to the bottom of the pail a pair of anges 10, these flanges being arranged in lfront of the center of the freezer and inclined toward each other at the rear, to Ithereby form virtually a wedge tapering rearwardly. These flanges 10 are adapted to engage a pair of similarly-inclined flanges 11 carried on the upper face of a table-clamp 12, the upper jaw-of this clamp being adapted to rest upon the top of the table or other support, a clamp-screw 13 being employed to firmly but removably anchor the clamp to the table. The ears or iianges 11 are undercut dovetail fashion and the flanges 10 are similarly undercut, to thereby hold the pail rigidly down on the upper faces of the fianges 11. To lock the pail to the clamp,

it will be seen that it must beinterlocked withthe fianges 11 by sliding the pail forwardly on the table, and to disconnect the pail a reverse movement must take place.

TWhen the pail is interlocked in this manner,

it ywill be seen that it is firmly anchored against movement in any direct-ion except arearward movement, thereby enabling the operator to turn the crank without exerting any effort to hold the freezer against move- G0 ment. The danger of disconnecting the freezer from the anchoring device by a backward movement is negligible, since there is a natural tendency to pull the freezer forwardly in-view of the fact that the operator must stand in front of the freezer in operating it. The advantage of placing the interloclring anchoring-flanges at a point in front of the center of the freezer is that in operation the freezer rests solidly on the table, i. e., does not project far enough be. yond the edge of the table forwardly to permit a forward tipping of the freezer. A further advantage is that in sliding it forwardly to interlock it with the anchoringflanges or sliding it rearwardly to unlock it therefrom, the freezer is supported by the table, thereby rendering it unnecessary for the operator to sustain the weight of the freezer either in putting it in position in the 8 anchoring device or removing it therefrom. The driving gearing is all located on aI bridgeplate le extending across and resting upon the rim of the pail, the edges of the rim being notched at 15 to receive the bridge- 85 plate and hold it against lateral movement on the pail. The bridge-plate is desirably made of sheet-metal, flanged for stiffness, and at one end it is detachably hinged to the top-edge of the pail by means of a pair of ears 16 curving downwardly and inwardly and adapted to detachably engage a pair of holes 17 formed in the pail near its upperedge. At the other end of the bridge is arranged a snap-latch 18 formed of an inte- 95 gra-l depending springbxtension of the bridge-plate yand provided with a shoulder 19 adapted to engage under an outwardlyextending shoulder on the pail. The outer end of a drive-shaft 2O of the gearing is 100 lied journaled in the latch-member 18, said shaft being provided at its outer end with the usual crank-arm 21. The advantage in thus arranging the crank-shaft with reference to the latch-member is that the latch may be disconnected and the bridge-member Vlifted and swung over out of operative position with one hand, this being done by simply grasping the crank 21 with one hand and, by pressing with the thumb on the pail at a point adjacent to the latch-member 18 and pulling out on the crank arm 21, the latch Will be disconnected from the shoulder 14, whereupon the bridge-member may be swung upwardly. Another way of disconnecting the latch-member is to insert one of the iingers of the hand that is grasping the crankarm 21 underneath the latch-member 18 and pull the latch-member outwardly far enough to disconnect it from the shoulder 19, the latch member having necessarily a slight movement independent of the shaft 20. In this manner, the bridge-member may be easily and quickly' disconnected to give access to the cream-can.

l prefer employing a special hand-grip for the crank 21. This grip is made of a single coiled wire 22 having the outer coil 23 resting in a groove 24 formed in the horizontal member of the crank, the engagement of the coil 23 with the groove 24 being a rotative one. In this way, a very simple handgrip is provided which will be capable of rotation independently of the crank-arm and will thereby operate without rotating in the hand of the operator.

` Depending from the under side of the bridge-plate 14 isa box-like bracket 25, the upper ends of the end-bars of this bracket being riveted to the bridge-plate. In one of the end-bars of this bracket the inner end of the driving-shaft 2O is journaled, and afiixed to the inner end of this shaft 20, at a point within the bracket 25, is the driving pinion 26. The upper side of the driving pinion 2G meshes with a driven gear 27 having a squared center adapted to engage the upper squared end of the flasher-shaft 28, said gear 27 being provided with an upstanding hub 29 turning in a hole in the bridge-plate 14. The gear 27 is supported against downward movement by means of a lip 30 formed integral with the adjacent. vertical wall of the bracket 25.

The lower edge of the driving pinion 26 engages a driven gear 31 resting on the bottom wall. of the bracket 25 and having a depending hub 32 extending through a hole in the bottom wall of the bracket,'this gear 31 being held against undue upward movement by means of a lip 33 formed on the adjacent wall of the bracket or hanger 25. The center of this gear 31 is squared so as to fit down'over the squared hub 34 aiiiXed to the top 35 of the cream-can, which top is of course, as usual, locked to the cream-can 36 so as to rotate the'same when the can-top is rotated.

With the above-described construction, it will be seen that l am enabled to make the three gears of stamped-up sheet-metal, especially since the teeth of the horizontal Vgea rs 27 and 31 are formed by a circular series of oblong perforations 37 in each of the wheels near its periphery, thus greatly reducing the cost of manufacturing this gearing. This construction also enables me to locate all the gearing underneath the bridge-plate, thereby providing not only a more sightly gearing arrangement but also providing for the location of the gearing at a place where it will be less likely to be injured in operation as well as in handling and also where it will be less likely to injure the fingers of children. Thus locating the gearing entirely on the underside of the bridge-plate is also advantageous in that it greatly increases the space between the bridge and the can-top and thus provides for packing more ice on top of the cream-can Vwithout interfering with the gearing. Y A

The dasher 38 is desirably made of a single piece of sheet-metal which is aliixed to the depending end of the dasher-shaft 28 by making transverse cuts in the dasher-plate and bending the metal in opposite directions to form clamp-members 39, these clampmembers 39 being semi-circular in horizontal section, thereby forming a central passage for the cylindrical shaft 28. The lower end of the shaft 28 is slabbed off on one side to form a depending tongue 40 and a downwardly-faoing shoulder 50. The shaft is affixed to the dasher by forcing it, byY a tight fit, down between the clamps 39, the tongue 40 extending downbelow the lowest clamp 39 and pressing hard againstthe adjacent face of the dashe-r-plate. 38, and the shoulder 50 being jammed ,down hard against the lower edge of the lowest slit in the plate. In this way, the shaft 28 may be rigidly affixed to the flasher-plate without the employment of rivets, the spring in the metal plate being entirely sufficient to hold the dasher against movement on the shaft if the parts be so proportioned as to provide for a very tight iit. The rigidity of the connection between the shaft and the flasher-plate is further ensured by the usual tinning process to which these parts are subjected to render them rust-proof.

It will be observed that the cream-can tapers downwardly its entire length. This renders it possible to nest the cream-cans for shipment purposes. The important advantages, however, in thus tapering the cans are, first, that it enables the cream t0 be removed en bloc, this being possible by simply heating the can slightly and then inverting it, whereupon the can may be pulled upwardly llO off the mass of cream, leaving the 'cream in the form of a block or cake upon the dish; secondly, it enables the` cream to be dipped out of the can more readily by means of a spoon by providing a wider area at the top of the can.

rIlhe dasher-plate is provided with two vertical series of openings 4l, each of which is flesirably inclined with reference to the vertical axis of the flasher, one series being located at either side of the vertical center of the flasher. The openings in one series are staggered with reference to the openings of the other series. IVith this arrangement of perforations, I provide for a thorough stirring of the cream, as is obvious. It will be observed also that each vertical half of the flasher is curved in horizontal section the full length of the flasher anfl that this curved half of the flasher inclines upwardly and backwarilly with reference to the direction of rotation, so that if the dasher is turned the cream that does not pass through the openings 41 will be caused to take a sliding movement upwardly, sliding off the top edge of the curved section of the dasher and turning over. I have founfl in practice that thus causing the cream to take a general bodily movement upwardly along the face of each half of the flasher, at opposite sides of the center of rotation, greatly hastcns the freezing of the cream anfl produces a much smoother cream. In addition to these advant-ages, it will be observed also that this form of dasher greatly facilitates the removal of the cream from the freezer by means of a spoon, since the curving back of the dasher, as shown more particularly in Fig. 4, gives more room for the spoon to be manipulated when it is flipped down into the can.

It will be observed that the flasher tapers downwardly to fit the can, the vertical outer edges of the flasher-plate lying close` to the inner face of the cream-can wall; this is desirable in order that the entire mass of cream will be agitated. A difficulty heretofore with flashers in which the edges of the dasherplate were arranged close to the cream-can wall has been that the flasher edges sometimes strike against the projecting shoulder formed by the usual vertical seam (42, Fig. 4) in the cream-can. This engagement of the vertical edges of the dasher-plate with the projecting edges of the seam is practically inevitable, since it is practically out of the question to make these seams so perfect as to avoid this contact. With my flasher, it will be impossible for the edges of the dasher to strike square against these seam edges, as the vertical edges of the flasher incline upwarlly and baokwardly with reference to the direction of rot-ation, so that these edges pass over the same progressively, i, e., in the manner of a draw-cut.

In this way, I am enabled to bring the edges of the flasher-plate very close to the creamcan wall and at the same time use no greater flegree of accuracy or care in making the seam in the can than is usual in manufacturing these cans. It will be 'observedthat the same result may be obtained by having the seam in the can inclined and the edges of the flasher vertically straight, and I therefore wish it understood that I desire to cover this modification.

The nature and scope of the invention having been thus indicated and the preferred embodiment having been specifically described, what is claimed as new is:

l. In an ice-cream freezer embodying gearing, ay bridge-plate carrying the gearing and having a depending spring latchmember at one end, and a crank-shaft for driving the gearing having its outer end j ournaled in said latch-member, for the purpose set forth.

2. In an ice-cream freezer having a dasher anfl a cream can, a removable bridge, and gearing carried by said bridge for driving the flasher in one direction and the creamcan in the other direction, said gearing being arranged on the under-side of the bridge.

3. In an ice-cream freezer, a removable bridge, a depending bracket carried thereby, a pair of gears mounted in said bracket, means whereby one engages the dasher and the other engages the cream-can to turn the same in opposite directions, and a driveshaft journaled in said bracket and carrying a pinion engaging both of said gears.

4. In an ice-cream freezer, a bridge carrying a depending bracket, a horizontal gear enclosed in said bracket and means for holding Vit against the under-side of the bridge,

r another horizontal gear and means for holding it on the bottom wall of the bracket,

means whereby the top gear engages the flasher andthe lower gear engages the cream-can, and means for driving said gears in opposite directions.

5. A dasher-shaft having its lower end out away at one side to form a downwardlyfacing shoulder and a downwardly-extending tongue, and a flasher-plate slitted transversely, the parts between the slits being bent in opposite directions to form semicircular clamps, for the purpose set forth.

6. A dasher for ice-cream freezers consisting of a plate curved in transverse section at opposite sides of the center of rotation, the curved channel thus formed inclining upwarflly and backwardly with reference to the direction of rotation.

7. An ice-cream freezer embodying a seamed cream-can tapering downwardly, a flasher-plate tapering downwardly and having` its edges arranged close to the inner face of the cream-can, said edges inclining upwardly and backwardly with reference` to the direction of rotation, for the purpose set other to permit the edges tol pass by the forth. seam in the manner of a draw-cut. l0

8. An ice-cream freezer embodying a In testimony `whereof I hereunto aix my cream-can having a Seam from top to botsignature.

5 tom and a rotary vertical dasher having MICHAEL AVROLLMAN.

blades Whose vertical edges Work close to Titnessesz theinterior of the can, said seam and said JOHN G. MOORE, Y

edges being inclined with reference to each ANNA Hmsmr.k

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