Improvements in Pumps.
Year: 1891

page_text: Date of Application, 24th June, 1891-Accepted, 25th July, 1891
COMPLETE SPECIFICATION.
Improvements in Pumps.
I, DANIEL MCKELLAR, Foreman Plumber, Cartsdyke, Greenock, Renfrewshire,
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 in writing, that is to say :-
This invention has reference to and comprises a new or improved construction
of double acting lift and force pump suitable for being operated by hand, and
which will be very applicable for use as a bilge or water supplying pump on
yachts, launches, and for other purposes, and be more simple and efficient than the
pumps heretofore in use.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings, in which the same reference letters are
used to indicate corresponding parts in all the figures where shown.
Figure 1 is a front elevation mostly in section to show the internal construction
of my improved double-acting pump.
Figure 2 is a side elevation view of the exterior of the pump looking at right.
angles to the view shown in Figure 1.
Figure 3 is a plan view of the pump with the top discharge chamber F removed
as taken on the line 1-1 Figure 1.
Figure 4 is a plan view of the pump taken on the lines 2-2 in Figures 1
and 2. And
Figure 5 is a sectional plan as taken on the line 3-3 in Figure 1, with the
piston removed.
Referring to these drawings:-The improved pump under the construction
shown in these figures consists as follows, of a central working barrel or cylinder A,
and inlet and discharge ducts B, and C, for the upper and lower ends of the
barrel A one on cach side. The barrel A, and duct B, are continued down and
jointed by leather or other insertion and screwed to the flange a, of the inlet valve
chamber D with lateral branch D' and provided with an inlet lift valve and
seat dd, and a connecting inlet lower branch D and screw couplings D². While
the central barrel A, and ducts B, C, are bolted or jointed at top by a brass or
metal plate E, with leather, india-rubber or other jointing insertion e, e³, on each
side to an upper chest water discharge chamber F with lateral port F¹ and hand
drawing off water tap F, at the side and outlet branch F2 at top with coupling to
discharge pipes at F. The pump has two or other number of brackets G with lugs
and holes for being screwed or bolted to a vertical wall or other convenient place.
A hinged clack or other inlet valve a', is fitted at the lower end of the central
barrel A. above the inlet chamber D; while another valve is fitted above the
upper end of the left hand duct B leading into the top of the central barrel A ;
and similar hinged discharge valves a², c, are fitted in the lower part of the upper
discharge removable chest F, above ports in the jointing metal removable plate E
leading from the central barrel and discharge duct C, from lower end of barrel A,
these valves being shown as formed of leather, or india-rubber, secured by plate
and screw at e and loaded with lead or metal weights, and may be fitted with lift
stops on the securing plate e. This improved arrangement of portable chests and
valve plates has the advantage of the valves being easily removed and renewed or
repaired without interfering with the main barrel and its working plunger. The
right hand duct C leads up from the central barrel A near its lower part where the
barrel is formed into a D shaped chamber chest A'. A piston or plunger is fitted
to reciprocate in the central barrel A above this chamber chest A', preferably

page_text: .
formed of leather cupped rings A', with metal discs A" on each side jointed by a
central stem A³ and nuts above, and coupled to a link rod A', the lower end of
which isjointed toits actuating lever, A keyed or otherwise secured to the inner
end of the actuating spindle A which works out through a stuffing box at A' in
the end cover of the chest chamber A, which is screwed by flanges thereto. A
hand operating lever A, is fitted and screwed by a square eye on this spindle A
outside the stuffing box, so that by moving or oscillating this lever A8 the
piston A, A, will be reciprocated up or down in the upper part of the central
barrel A.
The action of this double-acting lift and force pump. is as follows:-On the first
upward stroke of the piston A², A", water is drawn from the inlet branch D
through the lower valves i, a', into the lower end of the barrel A A'; and on the
downward stroke of the piston A', A", these lower valves d, a', are closed, and the
water in the lower chest chamber A', of the central barrel A is forced up the duct C
and through its top valve e into the upper receiving and discharge chamber F ;
while by this downward action of the piston water is simultaneously drawn from
the inlet chest D through the valved up the branch D' and duct B and through
its top valve into the upper end of the central barrel A above the piston A, A
And on the second upward stroke of the piston the water above it in the central
barrel A is forced up through the inner central top port and valve a² into the
upper receiving discharge chamber F; and simultaneously with this upward move-
ment of piston, water is drawn from the inlet branch D through the valves.d, a',
to the lower part of the barrel A below the piston; and these actions on respec-
tively at each upward and downward reciprocation of the piston A³ A" as operated
. by the hand lever A8, all as indicated by the arrows in Figure 1, thus giving a
lifting and forcing or double action from each end of the barrel A. The water
discharged through the valves c, a², into the top chest chamber F, may be either
forced to a higher level through the top discharge branch at F³, or be drawn off
by the hand tap F" through tlic side port F.
go
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 iş
First. The construction and use of a double-acting lift and force pump with a
central-barrel and two side ducts, and provided with valves, and receiving and
discharge valve chests and a reciprocating piston or plunger in central barrel
operated by a lever inside the pump and handle outside, substantially as herein
described in reference to and by way of application shown in the accompanying
drawings.
Second. In a double-acting lift and force pump, the actuating of the piston or
plunger by lever and link mechanism within the pump and handle outside, sub-
stantially as herein described in reference to and by way of application shown in
the accompanying drawings,
Third. In a double acting lift and force pump, the fitting of the valves on
removable plates within chests at the ends of the working barrel, substantially as
and for the purposes herein described in reference to and by way of application
shown in the accompanying drawings.
Dated the 23rd. June 1891.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.