Improved Appliance or Safety Device for Use in connection with Hose employed to Convey Pressure to Hydraulic Rivetters, Per- cussive Tools, and the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improved Appliance or Safety Device for Use in connection with
Hose employed to Convey Pressure to Hydraulic Rivetters, Per-
cussive Tools, and the like.
We, F. REDDAWAY & Co. LIMITED, of Cheltenham Street, Pendleton, Man-
chester, in the County of Lancaster, Manufacturers of Woven Machine Belting
and Hose, and JABEZ MUSKETT, in the employ of the said firm, Foreman Fitter,
do hereby declare the nature of this invention to be as follows:-
Our said invention relates to a safety device for use with hydraulic hose and
particularly for the hose employed to convey pressure to hydraulic rivetters and
similar percussive tools.
As is well known such hose is subjected when in use to heavy intermittent strains
as the fluid pressure is turned on and cut off to operate the piston of the tool.
These strong pulsations of the water pressure exert a powerful longitudinal strain
on the hose tending to damage the same and causing leakage at the couplings.
The object of our invention is to introduce at a convenient point or points in
the length of the hose one or more safety device or devices to take up the longitu-
dinal strain and thus relieve to a great extent the hose and couplings.
In constructing such a safety device in accordance with our invention we
provide a hollow piston working Huid tight within a suitable casing and capable of
siiding against the action of a spring. One end of the hollow piston projects beyond
the casing through a suitable gland and is connected to the hose, coupling or tool
in any convenient manner, the other end of the casing being also connected to the
hose.
The intermittent longitudinal pressure exerted by the pulsations of the fluid
causes the piston to slide within the casing against the action of the spring thus
relieving the hose and couplings from the strain.
On the pressure ceasing the spring returns the sliding piston to its normal
position within the casing."
By these means the longitudinal strain is taken up by the sliding piston or
gradually communicated thereby to the hose, thus obviating leakage of the
couplings or damage to the hose."
220
.
1000

page_text: Improved Appliance or Safety Device for Use in connection with
Hose employed to Convey Pressure to Hydraulic Rivetters, Per-
cussive Tools, and the like.
We, F. REDDAWAY & CO. LIMITED, of Cheltenham Street, Pendleton, Man-
chester, in the County of Lancaster, Manufacturers of Woven Machine Belting
and Hose, and JABEZ MUSKETT, in the employ of the said firm, Foreman Fitter,
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 and accompanying drawings:-
Our said invention relates to a safety device or appliance for use with hydraulic
hose and particularly for the hose employed to convey pressure to hydraulic
rivetters and similar percussive tools.
As is well known such hose is subjected when in use to heavy intermittent strains
as the fluid pressure is turned on and cut off to operate the piston of the tool.
These strong pulsations of the water pressure exert a powerful longitudinal strain.
on the hose tending to damage the same and causing leakage at the couplings.
The object of our invention is to introduce at a convenient point or points in
the length of the hose one or more safety device or devices to take up the longitu-
dinal strain and thus relieve to a great extent the hose and couplings.
Our invention will be clearly understood from a perusal of the following descrip-
tion in which reference is made to the accompanying sheet of drawings.
In the said drawings.
Fig. 1 is a longitudinal section of our improved safety device or appliance.
Fig. 2 is an end view of the same looking in the direction of the arrow.
In constructing a safety device in accordance with our invention we provide a
sliding tubular part a which is arranged to work within a suitable casing A. This
tubular part is formed with, or has secured thereto, a suitable collar a designed
to act as a piston, and to work within a cylindrical chamber a formed in the
casing A, against the action of a powerful spring b. This spring is held up to
its work by means of a gland through which passes one end of the sliding
tubular part a. The other end of the sliding tubular part a projects slightly beyond
the end of the casing A, as shown in the drawings, the casing being screwed or
attached to a union or gland d. To ensure the fluid tight working of the sliding
tubular part a we introduce between the cupped end of the casing A and the
screwed gland or union d a cup leather or packing e.
The hose is secured to each end of the device in the ordinary or any convenient
manner.
The intermittent longitudinal pressure exerted by the pulsations of the fluid
causes the piston a¹ to slide within the casing A against the action of the spring b
thus relieving the hose and couplings from the strain.
On the pressure ceasing the spring returns the sliding piston to its normal
position within the casing.
By these means the longitudinal strain is taken up by the sliding piston or
gradually communicated thereby to the hose, thus obviating leakage of the
couplings or damage to the hose.
We may use one or more of our improved safety devices in a length of hose as
will be well understood, the same being introduced at intervals as required.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
A safety device or appliance for use with hydraulic hose, consisting of a casing
containing a piston or sliding part working fluid tight against the action of a
spring, the sliding piston or part taking up or absorbing excessive longitudinal
strains which would in the ordinary course have a damaging effect on the hose
and parts, in the manner and substantially as hereinbefore described and as shown
in the drawing.