Improvements in Apparatus for Pumping the Liquor in Machines for Planking Felt Hat Bodies, applicable also to the Pumping of other Corrosive Liquids.
Year: 1898

page_text: 0
Improvements in Apparatus for Pumping the Liquor in Machines for
Planking Felt Hat Bodies, applicable also to the Pumping of
other Corrosive Liquids.
I, ORLANDO OLDHAM, of the Firm of Oldham & Son, of Steel Piston Coil Works,
Denton, in the County of Lancaster, Engineers, do hereby declare the nature of
this invention to be as follows:-
:-
This invention relates principally to apparatus to be employed in machines for
planking felt hat bodies, in order to spray an acid liquor over the said bodies
while submitted to the action of a series of rollers the said liquor being supplied
from the usual shallow supply tank or cistern below the said rollers to the
perforated pipe employed for spraying the liquor and fitted above the said
rollers.
It is found that this acid liquor soon corrodes the pumping mechanism and
interferes with the effective working thereof, and the object of my invention is
to prevent this corrosion.
For this purpose I interpose between the pipe which rises to the spray pipe, and
the pipe leading from the supply tank or cistern, a back pressure valve through
which the liquid from the said tank or cistern can force its way, and I connect
the lower end of the pipe leading to the spray pipe (which may form part of the.
latter) with an air pipe which is carried to a suitable distance above the level of
the supply tank or cistern (and may be bent down again) and connected to an
air pump fan or air propeller of suitable form and strength.
I prefer to use an air pump the piston rod of which is pivotted to the plunger
or piston and connected directly to a crank pin on a disc or pulley on a con-
venient shaft of the hat planking machine.
The action of this apparatus is as follows:-
The liquor from the supply tank or cistern passes through the back pressure
valve into the pipe leading to the spray pipe and into the air pipe up to a certain
level. The pressure of air driven from the pump into the air pipe then forces
this liquor up to the spray pipe and the liquor after passing among the hat bodies
and the planking rollers drops into the supply tank or cistern and is thus kent
in circulation. Owing to the height to which the air pipe is carried above the
level of the tank or cistern, the return stroke of the pump can not draw any of
the liquor into the cylinder, and thus the said liquor never comes in contact with
any part of the pump.
I also provide in the air pipe and beyond the point to which when the liquor
can rise therein a suitable valve by which the pressure of air on the liquor
and the consequent supply of the latter can be regulated and even stopped if
required.
It will be evident that the means for raising the corrosive liquor in the

page_text: planking machine as above described is also applicable to other machines or
places where it is required to raise an acid or corrosive liquor by a pump or by
similar means.
Dated thie 0th day of November 1900
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
Improvements in Apparatus for Pumping the Liquor in Machines for
Planking Felt Hat Bodies, applicable also to the Pumping of
other Corrosive Liquids.
r
I, ORLANDO OLDIIAM, of the Firm of Oldham & Son, of Steel Piston Coil Works,
Denton, in the County of Lancaster, Engineers, do hereby declare the nature of
this invention and in what manner the same is to be performed to be par-
ticularly described and ascertained in and by the following statement:-
This invention relates principally to apparatus to be employed in machines for
planking felt hat bodies, in order to spray an acid liquor over the said hat bodies
while submitted to the action of a series of rollers the said liquor being supplied
from the usual shallow supply tank or cistern below the said rollers to the per-
forated pipe employed for spraying the liquor, and fitted above the said rollers.
The manner in which my said invention is to be performed or carried into
practical effect will be readily understood on reference to the drawing hereunto
annexed and the following explanation thereof.
The drawing represents a partial sectional elevation of so much of a planking
machine as is necessary to illustrate the application of my invention thereto a
being a pair of planking rollers mounted above the shallow liquor tank b, and e
the perforated spray pipe fitted above the planking rollers. d is the pump
actuated by the eccentric e.
It is found that this acid liquor soon corrodes the pumping mechanism and
interferes with the effective working thereof, and the object of my invention is
to prevent this corrosion.
For this purpose I interpose between the pipe f which rises to the spray pipe c,
and the pipe leading from the supply tank or cistern, a back pressure valve h
through which the liquid from the said tank or cistern can force its way, and I
connect the lower end of the pipe f leading to the spray pipe (which may form
part of the latter) with an air pipe i which is carried to a suitable distance above
the level of the supply tank or cistern 6 (and may be bent down again) and
connected to an air pump d or to a fan or air propeller of suitable form and
strength.
I prefer to use an air pump the piston rod dx of which is pivotted to the
plunger or piston and connected directly to a crank pin on a disc or pulley or to
an excentric e on a convenient shaft of the hat planking machine.
The action of this apparatus is as follows:
The liquor from the supply tank or cistern 6 passes through the back pressure
valve h into the pipe f leading to the spray pipe e and into the air pipe i up to
a certain level. The pressure of air driven from the pump & into the air pipe i
then forces this liquor up to the spray pipe c and the liquor after passing among
the hat bodies and the planking rollers a drops into the supply tank or cistern b
and is thus kept in constant circulation. Owing to the height to which the air
pipe is carried above the level of the tank or cistern b, the return stroke of the

page_text: pump can not draw any of the liquor into the cylinder, and thus the said
liquor never comes in contact with any part of the pump.
I also provide in the air pipe, and beyond the point to which the liquor can
rise therein, a suitable valve k by which the pressure of air on the liquor and
the consequent supply of the latter can be regulated and even stopped if
required.
It will be evident that the means for raising the corrosive liquor in the
planking machine by the pressure of the air as above described is also applicable
to other machines or places where it is required to raise an acid or corrosive
liquor by a pump or by similar means.
In some cases, instead of connecting the top of the pipe f direct to the spray
pipe c I fix a cistern 7 above (as shown by dotted lines) and I carry the pipe f
straight up into the top of this cistern, fixing the end of the spray pipe e into a
hole near the bottom of the said cisern ; and in either case, in order that the
spray may be shut off at any time without stopping the working of the air pump
I provide a valve m at the top of the bend of the air pipe i which can be opened
to allow the pressure of air to escape, or I fit a similar escape valve n to the
pump d, as shown by dotted lines.
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:
The combination between the shallow liquor tank and the perforated spray
pipe, of an air-pump or other air-compressing apparatus and a pipe or pipes there-
from communicating with the liquor pipe in such a way that the circulation of the
liquor is maintained by the compressed air without the acid liquor coming into
contact with and corroding the working parts of the pump or other circulating
apparatus substantially as herein before described and illustrated by the drawing
annexed.
Dated the 4th dow of
1000
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.