Year: 1896

page_text: I, ENRICO MOTTURA, of 15, Place du Statut, Turin, Italy, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to the construction of a spring push valve in such a manner
that after delivering a certain amount of fluid it automatically closes without shock,
as I shall describe referring to the accompanying drawings.
Fig. 1 is a side view, Fig. 2 is an end view and Fig. 3 is a longitudinal section of
a spring push valve according to my invention. Figs. 4 and 5 are transverse sections.
respectively on the lines X X and Y Y of Fig. 3.
The valve box consists of a back part a having a supply branch a', and a front
part b which is screwed into the cylindrical front of a against packing 6. On b is,
pivotted a lover c connected by a pin working in a slotted hole to a stem d the head e
of which bears against the head g of another stem f. This stem is rigidly attached:
to a piston m in the front of which is sunk a washer i of caoutchouc or like packing
material held in by a collar on the stem ; a valve having an annular ridge at the
back bearing against the packing i and an annular ridge in front bearing against
packing, has a tube projecting in front and onclosing part of the stem which
is free to slide in . The packing washer 2 is held in place by a collar on the outlet
tubo t. The valve m is free to slide within a hollow oylinder n which is itself free to
slide within the cylindrical cavity of b. The valve forms the front of n. By
valves 9 and fluid can enter the annular space between and p the tubular rear:
extension of m, and by a valve fluid can enter between n and b, these valves
preventing fluid from issuing from their respective spaces. Through tho piston m
which is urged forward by a spring r, there are passages o, and through the valvo h
there are holes beyond the annular ridges of h. The piston n is urged forward by a.
spring u. On moving the lever c towards b and so pushing back tho piston m; the
fluid enclosed between the valves and g transmitts the pressure to n which is thus
also pushed back opening the valve h so that fluid can pass through p, through the
passages o, the holes in hand out through the outlet tube t. On releasing the lever ou
the springs and u conspiro to push forwards m and n so as to close the valve A, but
this is prevented by the fluid confined by the valve s until that has time to leak out.'
by the more or less looso fit of the front tubular part of n within b. The period.
occupied in this leaking out may be shortened as desired by cutting a groove along
either of the two sliding surfaces, and thus the quantity of fluid discharged after the
valve lever c is released may be more or less reduced. By arranging in push valves.
of ordinary construction a spring piston such as n with cavity such as that governed
by the valve s, and connecting this piston to the push button, tho shock caused by the
sudden closing of the valve can be prevented.
Dated this 21st day of Amount 1806
ABEL & IMRAY,
Agents for the Applicant.

page_text: Improvements in Spring Push Valves.
I, ENRICO MOTTURA, of 15 Place du Statut, Turin, Italy, Engineer, 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 relates to the construction of a spring push valvo in such a manuer
that after delivering a certain amount of fluid it automatically closos without shock,
as I shall describe referring to the drawings accompanying my Provisional
Specification.
Figure 1 is a side view, Figure 2 is an end view, and Figure 3 is a longitudinal
section of a spring push valve according to my invention, Figures and
transverse sections respectively on the lines X X and Y Y of Figure 3.
are
The valve box consists of a back part a having a supply branch a', and a front
part which is screwed into the cylindrical front of a against packing . On bis
pivotted a lever c connected by a pin working in a slotted hole to a stem d the head e
of which boars against the head g of anothor stem f. This stom is rigidly attached
to a piston m in the front of which is sunk a washer i of caoutchouc or like packing
material hold in by a collar on the stem ; a valve having an annular ridge at the
back bearing against the packing i and an annular ridgo in front bearing against
packing, has a tube h' projecting in front and onclosing part of tho stem which is
free to slide in h. The packing washer is held in place by a collar on the outlet
tube t. The valve m is free to slide within a hollow oylinder n which is itself free to
slide within the cylindrical cavity of b.
The valve forms the front of n. By valves g and fluid, can enter the annular
space between n and p the tubular rear extension of m, and by a valve s fluid can
entor between and 6, these valves preventing fluid from issuing from their respectivo
spaces. Through the piston m which is urged forward by a spring v, there are
passages o, and through the valve there are holes boyond the annular ridges of h.
The piston n is urged forward by a spring u. On moving the lover c towards b and
so pushing back the piston m, the fluid enclosed between the valves r and g transmits
the pressure to n which is thus also pushed back opening the valve h so that fluid can
pass through p, through the passages o, the holes in hand out through the outlet
tube t. On releasing the lever c the springs and a conspire to push forwards m and n
so as to close the valve, but this is prevented by the fluid confined by the valve s
until that has time to leak out by the more, or less loose fit of the front tubular
part of n within. The period occupied in this leaking out may be shortened as
desired by cutting a groove along either of tho two sliding surfaces, and thus the
quantity of fluid discharged after the valve lover c is released may be more or less
reduced. By arranging in push valves of ordinary construction a spring piston such
as n with cavity such as that governed by tho valvo , and connecting this piston
to the push button, the shock caused by the sudden closing of the valve can be
prevented.
с
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, 1 declare that what 1
claim is:-
A self closing spring push valve constructed and operating substantially as described
with reference to the drawings.
ABEL & IMRAY,
Agents for the Applicant.