US2295121A - Colloidal mill - Google Patents

Description

ep w. A. M LEAN 2,295,121

COLLOIDAL MILL Original Filed Jan. 5, 1938 2 Sheets-Sheet 1 Hal 3mm Mum/1 14 154W Sept. 8, 1942. w. A. MOLEAN COLLOIDAL MILL Original Filed Jan. 5, 1938 2 Sheets-Sheet 2 I Patented Sept. 8, 1942 UNITED STAT E S P TENT OFFICE common MILL ration of New York Griginal application January 5, 1938, Serial No.

Divided and this application October 5, 1939,v Serial No. 298,126

Claims.

My invention relates to mixing and emulsifying devices for materials such as emulsions containing high percentages of oil, such as mayonnaise, salad dressing, insecticide emulsions, etc. The mixtures may or may not be truly colloidal.

This application is a division of my co-pending case Serial No. 183,549, filed January 5, 1938.

An object of my invention is to provide a device of the character described which will quickly and simply make a homogeneous mixture, or a colloid, if desired.

A further object of the invention is to provide a construction which is simple and durable and which is easily repaired and with parts easy to replace.

A still further object of my invention is to provide a mixing mill which has a large output with small consumption of power and which gives a desired homogeneity to the final product.

With these and "other objects in view, which may be incident to my improvements, the invention consists in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements comprising my invention may be varied in construction, proportions and arrangement, without departing from the spirit and scope of the appended claims.

In order to make my invention more clearly understood, I have shown in the accompanying drawings means for carrying the same into practical efiect without limiting the improvements in their useful applications to the particular constructions, which, for the purpose. of explanation, have been made the subject of illustration.

In the drawings,

Figure 1 is a view in longitudinal section of one form of my mill;

Figure 2 is a view taken along the line 2-2 of Figure 1, looking in the direction of the arrows;

Each of Figures 3 through 5, inclusive, are illustrations showing in section mixing chambers and rotor constructions of different types of mills, each of the drawings showing a diiierent' modification.

Referring to the drawings, I have shown in Figure 1 a support structure, generally designated by the numeral I, which is provided with support spiders 2, and a base designated by the numeral 3. The base 3 is adapted to lie on the casing 4 of an electric motor. The shaft of the motor projects upwardly as indicated at 5, and is connected by means of a coupling 6 to a shaft l of a rotor member 8. The rotor 8 is a frustoconical element with a smooth surface. The

shaft 1 is journalled in the s pporting structure at a point 9. Above the point 9, and forming the casing, is a cylindrical aperture It in which are housed journal members II and I2.

Mounted over a cylindrical aperture l3 formed in the upper part of the support structure I is a cylindrical support element l4 which is held by means of nuts I5 screwed through brackets IS in the support structure I in a position such that its interior surface is substantially in line with the periphery of the aperture IS.

A support member I4 is provided at its top with screw threads ll. Mounted on these screw threads is a screw threaded annulus l8v which.

is adapted to be manipulated by operating handles 19.

Adapted to fit and slide up and down in, the annular support member I i is a chamber casting 29. This casting 28 is divided into a lower casting 2%) which is provided with a fluid chamber 2i which is connected by apertures 22 to a fluid chamber 23 situated in an upper casting 24.

The castings 2G and 2'4 form an oval mixing chamber 25 which has an upper opening 26 through which the material is fed. This aperture is screw threaded and adapted to receive a filling funnel or hopper 26'. The lower portion of the oval mixing chamber is provided with an aperture 21 which feeds into a chamber 28 having frusto-conical walls 29.

The clearance between the rotor 8 and the walls 29 of the chamber 28 is controlled by raising and lowering the entire casing 26 by rotating the handles [9 in order to move the annulus l8 to the desired position. When the proper adjustment has been made, wing nuts 33 on bolts 36 may be tightened to hold the adjustment fixed.

The rotor 8 is mounted in the chamber 28 and its upper surface is provided with pins 30. These pins are of different heights, the tallest being mounted in the center of the rotor and the heights progressively becoming smaller towards its periphery. There is a centrally mounted rod 3| which carries oval heaters 32.

Below the bottom of the rotor is a receiving chamber 35 which is provided with a slanted chute-like element 36 against which the mixture falls. The mixture, such as mayonnaise, flows down the chute element 36 and out at the aperture 31. The chute element 36 is provided with apertures 38 through which steam or cooling liquid may be introduced as desired.

In order to prevent splashing of the material, chamber 35 is closed with a cover plate 39 which is held in place by knurled nuts 40 which are mounted on bolts 4| carried by the support element I.

In operation, the required adjustment between the bottom of the chamber 28 and the surface of the rotor 8 having been effected, the mixture is poured into the mixing chamber 25 until the surface of the rotor is completely covered and, in fact, under certain circumstances, it is well to have the entire mixing chamber 25 filled with the rough mixture before mixing is started. As the material passes into the oval chamber 25, it is subjected to the action of the oval-shaped heaters 32 which act upon the material. From there it passes through the aperture 21 into the chamber 28 where the pins 30 act upon the material, and from there it passes between the rotor 8 and the frusto-conical surface 29 from whence it is discharged.

In Figure 3 I have shown a mixing chamber casting 50 which is provided with a chamber 51 and a frusto-conical chamber 52. There is a fluid chamber 53 to either heat or cool the material treated. The rotor 8 is provided with propeller-like members 54 and upstanding pins 55 on the top of the rotor. On the frusto-conical surface of the rotor are other pins 55. These pins are in staggered relationship with pins 51 on the frusto-conical surface 52.

In the form of mill shown in Figure 4 I provide a mixing chamber construction 60 having a conical chamber GI and a fluid chamber 62. The conical chamber 6| contains a conical rotor 63 having pins 64 on its upper surface lying in staggered relationship to the pins 65 formed on the conical interior surface 6| of the mixing chamber.

In Figure is shown a mixing chamber construction 10 which is provided with a fluid chamber H and mixing chamber proper 12 of cylindrical shape. There is provided in this construction a rotor 13 of globular shape provided with pins '14. Some of the pins 14 have lying between them pins 15 fixed to the inner surface of the chamber 12.

While I have shown and described the preferred embodiment of my invention, I wish it to be understood that I do not confine myself to the precise details of construction herein set forth, by way of illustration, as it is apparent that many changes and variations may be made therein, by those skilled in the art, without departing from the spirit of the invention, or exceeding the scope of the appended claims.

I claim:

1. In a mechanism for forming an emulsion such as mayonnaise, a mixing chamber comprising a stator member including a frusto-conical recessed portion, a frusto-conical rotor disposed in said recessed portion in spaced relation therefrom, an oval-shaped extension chamber mounted directly above said stator member, said oval shaped extension chamber communicating with the mixing chamber through an opening having a substantially smaller area than the area of the upper surface of the rotor, a support centrally mounted on the upper surface of the rotor and extending through the said opening into said extension chamber, a plurality of bent rods mounted on the portion of the support within the extension chamber to form a beater, said rods being bent to form concentric ovals in spaced relation, means to selectively adjust the distance between said rotor and stator, and motor driven means to rotate said rotor and beater.

2. In a mechanism for forming an emulsion such as mayonnaise, a mixing chamber comprising a stator member including a frusto-conical recessed portion, a frusto-conical rotor disposed in said recessed portion in spaced relation therefrom, an oval-shaped extension chamber mounted directly above said stator member, said oval shaped extension chamber communicating with the mixing chamber through an opening having a substantially smaller area than the area of the upper surface of the rotor, a support centrally mounted on the upper surface of the rotor and extending through the said opening into said extension chamber, a plurality of bent rods mounted on the portion of the support within the extension chamber to form a beater, said rods being bent to form concentric ovals in spaced relation, the length of the minor and major axis of said beater being substantially the same as the corresponding axes of said ovalshaped chamber, means to selectively adjust the distance between said rotor and stator, and motor driven means to rotate said rotor and heater.

3. In a mechanism for forming an emulsion such as mayonnaise, a mixing chamber comprising a stator member including a frusto-conical recessed portion, a frusto-conical rotor disposed in said recessed portion in spaced relation therefrom, an oval-shaped extension chamber mounted directly above said stator member, said oval shaped extension chamber communicating with the mixing chamber through an opening having a substantially smaller area than the area of the upper surface of the rotor, a support centrally mounted on the upper surface of the rotor and extending through the said opening into said extension chamber, a plurality of bent rods mounted on the portion of the support within the extension chamber to form a beater, said rods being bent to form concentric ovals in spaced relation, two series of diametrically opposed, radially aligned, vertical teeth mounted on said rotor, said teeth being situated entirely within the mixing chamber and being in substantially the same horizontal plane as the said centrally mounted support and progressively decreasing in height outwardly from said support, means to selectively adjust the distance between said rotor and stator, and motor driven means to rotate said rotor and beater.

4. In a mechanism for forming an emulsion such as mayonnaise, a mixing chamber comprising a stator member including a frusto-conical recessed portion, a frusto-conical rotor disposed in said recessed portion in spaced relation therefrom, an oval-shaped extension chamber mounted directly above said stator member, said oval shaped extension chamber communicating with the mixing chamber through an opening having a substantially smaller area than the area of the upper surface of the rotor, a support centrally mounted on the upper surface of the rotor and extending through the said opening into said extension chamber, a plurality of bent rods mounted on the portion of the support within the extension chamber to form a beater, said rods being bent to form concentric ovals in spaced relation, the length of the minor and major axis of said beater being substantially the same as the corresponding axes of said oval-shaped chamber, two series of diametrically opposed, radially aligned, vertical teeth mounted on said rotor, said teeth being situated entirely within the mixing chamber and being in substantially the same horizontal plane as the said centrally mounted support and progressively decreasing in height outwardly from said support, means to selectively adjust the distance between said rotor and stator, and motor driven means to rotate said rotor and beater.

5. In a mill for forming an emulsion such as mayonnaise, a mixing chamber comprising a stator member including a frusto-conical recessed portion, a frusto-conical rotor disposed in said recessed portion in spaced relation therefrom, an oval shaped extension chamber mounted directly above said stator member so that each chamber has the same central axis, said oval shaped extension chamber communicating with the mixing chamber through an opening having a substantially smaller area than the area of the upper surface of the rotor, a rod centrally mounted on the upper surface of the rotor and extending verticallly through the said opening horizontal plane as the said centrally mounted.

support and progressively decreasing in height outwardly from said support, means to selectively adjust the distance between the said rotor and stator, and motor driven means to rotate said rotor and beater.

WILLIAM A. McLEAN.

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