Improvement in Pottery-dipping Tubs.
Year: 1889

page_text: Date of Application, 3rd Oct., 1889-Accepted, 16th Nov., 1889.
COMPLETE SPECIFICATION.
Improvement in Pottery-dipping Tubs.
I, CASSIUS CLARK THOMPSON, Gentleman of East Liverpool, in the county, of
Columbiana and State of Ohio, United States of America, do hereby declare the
nature of my invention for IMPROVEMENT IN POTTERY-DIPPING TUBS and in what
manner the same is to be performed, to be particularly described and ascertained-in
and by the following statement :-
My invention relates to an improvement in pottery dipping tubs, and it consists in
the combination of a tub in which the glazing mixture is placed with an agitating
device which is placed in the bottom of the tub, and over which is preferably placed a
screen, as will be more fully described hereinafter.
The object of my invention is to place in the bottom of the tub in which the glazing
compound is kept an agitating device which will keep the glazing compound in con-
stant motion and prevent the heavier particles therein from settling to the bottom, and
thus obviate the necessity of having to stir up the compound each time before an
article is dipped.
Reference being had to the accompanying drawings, which form a part of this
specification,
Figure 1 represents a vertical section of a machine which embodies my invention.
Figure 2 shows a slight modification.
Figure 3 shows a revolving tub.
Figure 4 shows a stationary tub and a vertically moving agitator.
A represents the tub in which the glazing compound is placed, and which tub is
preferably made smaller at the bottom than the top. In the bottom of this tub is
journaled an agitating device B, of any suitable description, which is operated by the
shaft C, which may extend vertically, as is here shown, or through the side or bottom
of the tub, just as may be preferred. Although a screw is here shown, it is evident
that any other form of device may be used for the purpose of keeping the glazing
compound in constant motion, and thus preventing any of the heavier particles therein
from settling to the bottom of the tub. As here shown, the shaft C extends vertically
through the tub, and is held in position by means of a bearing G, formed in the
bottom of the tub, and a second bearing H, which may be attached to the top in any
suitable manner.
For the purpose of preventing the heavier particles of the mixture from settling in
the bottom of the tub upon the agitating device, and for the purpose of preventing
the agitating device from forcing the glazing compound upward too forcibly, a fine
netting or screen I is placed in the bottom of the tub, just above the agitating device,
as shown. Should the agitator at any time be made to revolve more rapidly than is
necessary, this screen, made of any suitable material, will prevent the compound
from being agitated too violently to allow nice dipping to be done. In each case the
wheel or agitating device B is so shaped as to cause an upward movement of the
material, whereby the heavy particles are kept at the top, and the screen is for
the purpose of modifying the upward current by interrupting it, and thus causing it
to be always steady and uniform.
Should it be desired the vertical shaft C may be provided with arms a which extend
borizontally through the bottom of the tub, and the tub be provided with horizontal
arms b below the screen I, and then the tub be made to revolve while the shaft remains
stationary, or both the tub and the shaft may be made to revolve, as may be desired.
If desired the stirrer may be made to operate vertically or in any other way that will
serve to keep the glazing compound in motion. I do not restrict my invention to
any particular construction, for this may be varied without departing from the spirit
of my invention. My main object is to have the glazing compound kept in constant
motion, as above described.

page_text: Heretofore the glazing compound has been placed in a tub without an agitating
device, and the consequence has been that the heavier particles settle to the bottom at
once. Before an article can be dipped the agitator is obliged to use a paddle for the
purpose of stirring up the mixture, so that an article will be properly glazed. By
means of the construction here shown the necessity of an operator stopping to stir up
the glazing compound is done away with, and the consequence is a person can dip
more rapidly and effectively than has heretofore been possible.
1
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination, with a pottery-glazier's dipping-tub, and an agitator placed in
the bottom thereof and causing an upward current of the material placed in the tub,
of a screen which covers the entire surface above the agitator, for the purpose of
modifying the upward current, substantially as shown and described.
2. The combination with a pottery-glazier's dipping-tub having its lower end
reduced in size, and a screen which covers the top of the reduced portion, of an
agitator placed within the reduced portion beneath the screen, which causes an
upward current of the material, and which is modified by the screen, substantially as
set forth.
Dated this 3rd day of October 1889
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.