Improvements in Acid Pumps.
Year: 1895

page_text: Date of Application, 16th Aug, 1895
Complete Specification Left, 21st Apr., 1896-Accepted, 30th May, 1896
Improvements in Acid Pumps.
I, ERNEST PHELPS PEYTON, of Lister Street, Birmingham, in the County
of Warwick, Manufacturing Chemist, do hereby declare the nature of this
invention to be as follows:-
My invention has reference to the pumps used principally by manufacturing
chemists and known in commerce as acid pumps. The said pumps are made mainly
of earthenware the pistons of the pumps having an axial hole extending from the top.
to near the bottom of the said piston, an iron rod by which the piston is worked
being fixed in the axial hole in the piston by sulphur or other cement. The said
earthenware pistons after long use become cracked or disintegrated the acid having
percolated through the earthenware and attacked the iron rod, the sulphate of irou
produced effecting the cracking or disintegration described.
In order to obviate the defect referred to namely the cracking or disintegration
of the pistons of acid pumps. as ordinarily, made, I make the said pistons of glass
instead of earthenware the acids in connection with which acid pumps are generally
used having no action upon glass. In consequence of the non-porosity of glass the
said acids are perfectly isolated from the iron axis of the piston and no corrosion of
the iron takes place. The glass pistons which. I employ are made preferably from
flint glass by the ordinary methods of manufacture.
Although I use glass in preference to any other material in the manufacture of
the pistons of acid pumps yet I do not limit myself to the use of glass as other
non-metallic vitreous or semi-vitreous material such for example as china may be
employed for that purpose.
Where for any reason it is found necessary or desirable to use earthenware.
pistons I treat the said pistons so as to make them impervious to acids. This:
1 effect by treating the earthenware pistons by means of melted paraffin or wax the
paraffin or wax being employed either in a melted state or by means of a solution:
of the paraffin or wax in benzine or other volatile solvent. The pistons are.
immersed for a time in the solution of paraffin or wax and on being withdrawn are,
exposed to the air for the purpose of effecting the volatilization of the solvent.
They are immersed in the solution a second time and a second time dried and so on
until the earthenware has been made impervious to liquids. The requisite number
of treatments of the earthenware pistons by the solution of paraffin or wax will.
depend upon the nature of the earthenware of which the pistons are made,
ordinarily two or three treatments of the said pistons are sufficient.
Or instead of treating the ordinary earthenware pistons with paraffin or wax
their porosity may be destroyed by enamelling them.
Dated this Sixteenth day of August 1895.
:
W. T. WHITEMAN,
Agent for the Applicant.

page_text: догу гирь.
I, ERNEST PHELPS PEYTON, of Lister Street, Birmingham in the County
of Warwick Manufacturing Chemist, do hereby declare the nature of my invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention has reference to the pumps used principally by manufacturing
chemists and known in commerce as acid pumps. The said pumps are made mainly
of earthenware the pistons of the pumps having an axial hole extending from the
top to near the bottom of the said piston; an iron rod by which the piston is worked
being fixed in the axial hole in the piston by sulphur or other cement. The said
earthenware pistons. after long use become cracked or disintegrated the acid
having percolated through the earthenware and attacked the iron rod the sulphate
of iron or other salt of iron produced effecting the cracking or disintegration
described.
L
In order to obviate the defect referred to namely the cracking or disintegration
of the pistons of acid pumps as ordinarily made; I make the said pistons of glass
instead of earthenware the acids in connection with which acid pumps are generally
used having little or no action upon glass. In consequence of the non-porosity of
glass the said acids are perfectly isolated from the iron axis of the piston and no
corrosion of the iron-takes-place. The glass pistons which I employ are made
.preferably from flint glass by the ordinary methods of manufacture.
'
The accompanying drawing represents, partly in elevation and partly in section,
the piston of an acid pump constructed according to my invention.
The body a of the said piston consists of 'a' glass cylinder closed at its lower end.
The open top end a² of the glass cylinder a through which open top the 'axial rod 6
and sulphur or other cement c are introduced is contracted as represented so as to
render the accidental withdrawal of the axial rod b and its binding material.or
cement c. practically impossible. Between the top of the glass cylinder a and the
metallic flanged an india rubber washer'e is interposed."
•
Although I use glass in preference to any other material in the manufacture of
pistons of acid pumps yet I do not limit myself to the use of glass as other
non-metallic vitreous or semi-vitreous material such for example as china may be.
employed for that purpose:
Where for any reason it is found' necessary or: désirable to use earthenware
pistons I treat the said pistons so as to make thèm' impervious to acids. This
effect by treating the earthenware pistons by means of paraffin or wax' or resin or
the like, the paraffin, wax or resin or the like being employed either in a melted
state or by means of a solution of the paraffin or wax or resin or the-like in benzine
or other volatile solvent!
:. When I treat the earthenware pistons with a solution of paraffin, wax' or resin
or the like, I immerse the said pistons for a time in the solution of paraffin, wax;
resin or the like and on withdrawing them expose them to the air for the purpose
of effecting the volatilization, of the solvent. They are immersed in the solution a
second time and a second 'time dried and so on until the earthenware has been made
impervious to liquids: The requisite number of treatments of the earthenware
pistons by the solution of paraffin, wax, resin, or the like will depend upon the
nature of the earthenware of which the pistons are made; ordinarily two or three
treatments of the said pistons are sufficient.
Or instead of treating the ordinary earthenware pistons with paraffin, wax, resin
or the like their porosity may be destroyed by enamelling them.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that I claim
as my invention of "Improvements in acid pumps
"
First. Making the pistons of acid pumps of glass, china or other vitreous or
semi-vitreous material impervious to acids substantially as hereinbefore described
and illustrated in the accompanying drawing.
Secondly. Treating the earthenware pistons of acid pumps with melted paraffin
or wax or resin or the like or with a solution of paraffin or wax or resin or the like
so as to render them impervious to liquids substantially as herein before described.
Thirdly. Making earthenware pistons of acid pumps impervious to liquids by
enamelling them substantially as hereinbefore described.
Dated this Twentieth day of April 1896.
ERNEST PHELPS PEYTON.