IMPROVEMENTS IN PUMPS EMPLOYED IN THE MANUFACTURE OF ARTIFICIAL ICE
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Thomas Douglas Kyle at the Office
of the Commissioners of Patents on the 6th March 1883.
THOMAS DOUGLAS KYLE of 57 Moorgate Street in the City of London,
Engineer "IMPROVEMENTS IN PUMPS EMPLOYED IN THE MANUFACTURE OF
ARTIFICIAL ICE"
My Invention has for its objects to so construct the Valves of pumps used in the
manufacture of artificial ice that they are not liable to fracture as at present and to
provide a tight and well lubricated packing for the piston or plunger rods of the
said pumps.
According to my said Invention I make the Valves of a conical form and arrange
them to be operated by a motion of partial rotation in valve casings situated close
to the pump ports so that when the gases are under compression in the pump they
will be nearly all expelled and also a vacuum will take place at once thereby
making the pump more perfect in its action. The valves will each be furnished
with two or more ports or passages through their periphery to their interior they
being hollow and open at both ends their one open end being opposite the cover or
end of the valve casing which thus takes the press and their other open end giving
communication with the inlet or outlet passage as the case may be-The motion of
partial rotation necessary to actuate the valve may be obtained by Cams eccentrics
tappets or other devices from any convenient part of the pump or Engine. Owing
to the valve being hollow and open at the ends the pressure or Vacuum does not
act on it but on the valve box cover. The valve has therefore no tendency to be
forced from its seat by pressure or drawn thereonto by vacuum In order to draw
the valve towards or press it from its seat there may be employed a bow spring
connected at one end to the spindle of the valve and at the other end by a slotted
connection to the valve casing so that it may be adjusted by means of the, slotted
connection and fixed in position by thumb screws or otherwise. In order to
prevent the cutting or grooving of the piston rod by the packing leathers it is made
of wrought iron or steel and a cast iron covering or sleeve is shrunk thereonto
forming a rod with a wrought iron or Steel core and an outer part of Cast Iron.
To pack the piston rod I use cup leathers in the packing box-These cup leathers
are especially adapted for use in the ether pump in place of the India rubber
D

page_text: packing at present employed. The following is an arrangement of such cup
packing There are two sets of such packing above and below a brass or bush
piece contained in the packing box and encircling the rod. The said brass has a
groove around its outer side from which perforations lead to the rod. The lubricant
is led by a pipe or passage to this groove and then passes to the rod. A pipe leads
from the delivery of the pump to the reservoir of the lubricant to give a pressure
to the said Lubricant equal to that in the delivery-The valve spindles may be
lubricated by a similar arrangement the lubricant being led if convenient by pipes
from the groove in the brass of one Lubricator to the groove in the brass of the
next lubricator and so on through the series.