US616052A - Charles a - Google Patents

Description

Patented Deg; l3, I898.

C. A. BROWN.

PAINT AGITATUR.

(Application flied Aug. 13, 1698.)

(No Model.)

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7 NITED p STATES PATENT FFICE.

CHARLES A. BROWVN, OF ST. LOUIS, -MISSOURI, ASSIGNOR TO THE MOUND CITY PAINT AND COLOR COMPANY, OF SAME PLACE.

PAINT-AGITATO R.

SPECIFICATION forming part of Letters Patent No. 616,052, dated December 13, 1898.

Application filed August 13, 1898. Serial No. 688,509. (No model.)

To all whom it may concern:

Be it known that I, CHARLES A. BROWN, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Paint-Agitators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to improvements in agitators for mixing paints designed for use in what is known asthe dipping process, in which articles are coated with paint by immersion instead of having the paint applied by a brush.

I am aware that in paint-agitators it is not new to use a revolving screw or other beater located at the bottom of the tank in which it operates, and that it is also old to place a guardordiaphragmdirectlyabovethisbeater, so that tools or the object immersed cannot come in contact with the agitating heater or screw; but in the use of such agitators it has been found in practice that when the heater 2 5 remains at rest for any considerable time as, for instance, over nightthat the heavier ingredients in the paint,owing to their greater specific gravity, accumulate in the bottom of the receptacle and firmly embed in a more or less compact mass the said heater or screw.

This makes it difficult and sometimes impossible to start the agitator when power is again applied. To overcome this objectionable feature is the object of my invention.

Figure I is a vertical cross-section of a tank or receptacle provided with my improvement. Fig. II is an enlarged view of the bottom thereof. Fig. III is a detail perspective View of a portion of a hinged platform or diaphragm. Fig. IV is also a detail perspective view of a series of troughs which are placed in the tank below the diaphragm shown in Fig. III.

1 designates a tank for the reception of paint, into which objects desired to have a coating of paint applied thereto may be immersed, while the paint is kept constantly agitated to render its solution uniform. The tank is preferably provided with a curved bottom 2, in which an agitator or beater 3 is located. The beater is carried by a shaft 4,

driven by any suitable power.

5 designates ledges on the inner sides of the tank-Wall above the line of the agitator or beater-,whieh ledges are adapted to support the ends of bars 6.

7 are troughs attached to the bars 6 and extending, preferably, from end to end of the tank. A portion of the troughs 7 are located above the bars 6, and a portion of them are suspended therefrom. The troughs above the bars are seated a considerable distance apart, leaving spaces between them, and those above the bars occupy positions immediately beneath the spaces between the upper set of troughs. This arrangement provides spaces for the passage of the thinner paint past the troughs 7, owing to the spaces between them, while the staggered arrangement of the troughs forms a guard to prevent objects immersed in the paint from descending into contact with the agitator.

In one of the side walls of the tank are eyes 8, located at a greater elevation than the troughs 7. These eyes receive links 9, that in turn are connected to one of a series of slats 10. The slats 10 are arranged side by side with, preferably, narrow interstices between them and form a platform sufficient to extend across the interior of the tank and connected together by transverse bars 11.

The links 9 form an essential feature in my apparatus. When the platform composed of the slats 10 is lowered into position to receive the settlin g paintwhile the agitator is at rest, the link-hinges permit the seating of the platform in such manner as to effectually catch all the heavy pigment and prevent its descent to the heaters to clog them. Then when the platform is raised the links allow the hinge edge of the platform to be pulled away from the side wall of the tank, leaving a space between the tank-wall and platform through which the settled pigment on the platform falls as the platform is raised. It will be readily perceived that were the hingejoint of the platform simply a pivotal one a pocket between the platform and tank-wall would be formed, in which the heavy paint would be confined and held when the platform was elevated and in which it would re main in a compact mass.

- 12 is a chain secured to the free side of the platform, by means of which it may be raised into the position shown by dotted lines in Fig. I.

The advantages obtained by using the platform constructed of the bars 10 are manifest in that it practically prevents any of the heavy matter or sediment of the paint from settling in the bottom of the tank and surrounding the heaters 3. This heavy matter settles when the agitator is not in use on the said platform, and this platform when the operation of the apparatus is to be resumed is drawn up against the side of the tank by means of the chain 12, allowing the heavy matter to be churned or mixed on the operation of the beaters which send the thinner substance up through the spaces between the troughs 7.

I am aware, as hereinbefore mentioned, that it is not new, per se, to locate a guard in a paint-agitator tank to prevent objects from striking against the beater therein; also, that it has heretofore been proposed to locate a guard above the heater to catch the settling heavy pigment when the beater is at rest. I therefore do not claim a guard considered alone; but I claim it to be novel to use a guard with a movable platform surmounting said guard. I do not limit my invention to such platform being hinged to the tank, as it may be otherwise suitably mounted therein.

I claim as my invention 1. In a paint-agitator,the combination with a tank, of a beater mounted in the lower portion thereof, a guard in said tank above said beater, and a movable platform arranged above said guard, substantially as described.

2. In a paint-agitatonthe combination with a tank, of a beater mounted in the lower portion thereof, an open-work guard in said tank above said beater, and a platform hinged to the wall of said tank above said guard, substantially as described.

3. In a paint-agitator,the combination with a tank, of a beater mounted in the lower portion thereof, an open-work guard in said tank above said heater, a platform hinged to said tank above said heater, and means for raising said platform, substantially as described.

4. In a pain t-agitator,the combination with a tank, of a heater mounted in the lower por tion thereof,an open-Work guard in said tank above said beater, a platform adapted to seat in said tank above said guard, and links conmeeting said platform to said tank, substantially as described.

5. In apaint-agitator,tl1e combination with a tank, of a heater located in the lower portion thereof, an open -work guard located above said beater, and a platform seated in said tank above said guard, said platform being composed of slats, said slats being separated from each other by interstices of less width than the interstices between the bars of said open-work guard, substantially as described.

OHARLES A. BROWN. In presence of-- E. S. KNIGHT, STANLEY STONER.

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