Improvements in. Rotary Pumps.
Year: 1894

page_text: Date of Application, 28th. Sept., 1894
Complete Specification Left, 15th June, 1885-Accepted, 20th July, 1895
Improvements in. Rotary Pumps.
I, GERAUD MARTY, of Puymirol; Département de Lot-et-Garonne, France,
Notary, do hereby declare tho nature of this invention to be as follows:-
This invention relates to improvements in, rotary pumps and consists of a
cylindrical casing formed at its lower end with a support or foot capable of being
fixed to a frame, the said casing near its support or foot being formed, with an
inlet and outlet passage.
Inside the said casing is attached eccentrically to the square end of a driving
shaft a cylindrical body having in its periphery a slot with an inclined base adapted
to receive the said square end.and provide a little play opposite its inclined base,
for the purpose of compensating for any wear that might take place, by the
adjustment of a screw employed outside the casing acting longitudinally upon the
saidi shaft.
Upon the said cylindrical body is placed a ring or piston adapted to move in
contact with the interior of the casing and formed below with a leg adapted to
slide between, two segmental parts mounted in the support or foot of the said
casing and retained in position by means of an adjustable step. The said casing
at one side is formed with a cover secured thereto by means of bolts. When.the
said shaft is set in rotation the said ring or piston runs always, accurately along the
interior of the casing thus creating a suction in the inlet and a pressure in the outlet
passage of the pump.
Dated this 27th day of September 1894.
F. BOSSHARDT & Co.,
Agents to Applicant..
Improvements in Rotary Pumps.
I, GERAUD MARTY, of Puymirol, Département de Lot-et-Garonne, France,
Notary, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention has for its object the construction of a rotary pump which has
no valves, is simple and strong, in construction, is less liable to wear and more
readily adjusted by specially arranging the pump shaft.
:
And in order that my invention may be more fully understood I have caused to
be, appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
.
Fig. 1 is a cross section, Fig. 2'a longitudinal section at line 1-1 of Fig. 1, of
a pump.constructed in accordance with my invention.
Fig. 3,is a cross section and Fig. 4 a longitudinal section at line 2-2 of Fig. 3,
of a modification of my invention.
In carrying out my invention and referring to Pigs: 1 & 2, I employ a cylindrical
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page_text: E
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casing a formed at its lower end with a support or foot
capable of being fixed to
a frame, the casing a Dear its support or foot b being formed with an inlet and
outlet passage c & c¹ respectively.
Inside the casing a le attached eccentrically to the square end of a driving
ebaft da cylindrical body e having in its periphery a slot with an inclined base
adapted to receive the said square end and provide a little play opposite its inclined
base for the purpose of compensating for any wear that might take place by the
adjustment of a screw employed' outside the casing a acting longitudinally upon
the shaft d.
Upon the cylindrical body e is placed a ring or piston g adapted to move in
contact with the interior of the casing a and formed below with a leg g' adapted
to slide between two segmental parts,, mounted in a socket in the support
or foot 6 of the casing a and retained in position by means of an adjustable step.
The casing a at one side is formed with a cover k, see Fig. 2, fitting inside and
secured' thereto, over which is fixed a counter' plate m having bosses adapted to
receive glands for setting up the cover k. When the shaft d is set in rotation
the ring or piston runs always accurately along the interior of the casing a thus
'creating a suction in the inlet and a pressure in the outlet passage c, c' of the pump
respectively.
'
.1°
The pump will draw as soon as the 'ring or piston g 'has made a revolution in
amonut equal to the quantity of air contained in the inlet tube and in the
"cylindrical casing a and which amount is also expelled during each revolution.
According to the modification shown in Figs. 3 & 4 the pump is made double
acting and having two cylindrical casings A, A', between which are arranged the
in and outlet passages C, C', respectively.
In this construction of pump the shafts D, D, are formed in one with the
cylindrical body E, E', respectively and the inclined square end d'; shown in
Fige. 1 & 2, is dispensed with without departing from the nature of my invention
as will be readily understood.
The legs G, G', of the rings or pistons G; G, engage and slide easily in each
other and form at the same time a partition.
'
It is essential that the speed of the said rings or pistons is uniform, which is
attained by gearing the shafts D, D', by means of pinions J, J', in such a manner
that they will revolve in opposite directions.
A fly wheel V is fixed to the end of one of the shafts D, D', and its rotation
controls the suction of a volume of air or liquid equal to the volume expelled
from the interior of the two cylindrical casings.
It will be easily noticed that whilst one of the rings or pistous G is at its dead
centre the other having already travelled balf of its course is at the extent of its
stroke.
The duplex arrangement described causes the pump to deliver air or liquid
with greater regularity and in double the quantity than it would be possible with
n pump having a single ring or piston.
1
The casing of the double pump closed in the same manner as the single one
described by a plate K, of suitable form, made to fit. accurately against the ring
or piston, eccentric and shaft etc. and maintained in position by a secoud plate L
formed with holes adapted to pass over the shaft ends, the said holes being
threaded to receive a correspondingly threaded gland" by means of which the
pump is kept tight, the said plate being secured to the cylindrical casing A 'by
means of the bolts l.
It may be remarked that in each construction of pump described and' illustrated
whether single or double the rotation being greatly facilitated, the friction is
reduced to a minimum.
J
According to another modification instead of guiding the leg g, shown in Fig. 1,
between two semi-circular parts h, h', it may be guided' in any other suitable
manner, for instance in a groove in which case however the leg g" would be jointed
to the ring or piston g.
L.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is;-
"In rotary pumps."
1st. The general construction and combination of parts constituting my improve-
ments operating substantially as and for the purpose-set forth.
2nd. A cylindrical casing closed hermetically in which is adapted to rotate a
ring or piston having a leg adapted to slide in a slot, all substantially as set
forth and with reference to Figs. 1 & 2.
3rd. In a pump, as specified in the preceding claim, the combination of two
rings or pistons adapted to rotate in opposite direction inside a double casing,
each of the said rings or pistons having a leg adapted to engage and slide in
each other, all substantially as and for the purpose set forth with reference to
Figs. 3 & 4.
4th. In a pump, as specified in the preceding claims, forming the body e with
a groove having an inclined baso adapted to receive the shaft d by means of
which the ring or piston g can be adjusted against the inner periphery of the
casing when worn, all substantially as set forth.
Dated this 14th day of June 1895.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.