An Improvement in and relating to Agricultural “Sprayers."
Year: 1899

page_text: Date of Application, 5th May, 1899
Complete Specification Left, 5th Feb., 1900-Accepted, 10th Mar., 1900
PROVISIONAL SPECIFICATION.
An Improvement in and relating to Agricultural “Sprayers."
I, EDWIN JOHN GOODE, of Elmdon Lodge Farm, Saffron Walden, Essex,
Machinist, do hereby declare the nature of this invention to be as follows:-
This invention relates to agricultural "sprayers "said sprayers consisting of
pumping apparatus, usually worked by horse power, combined with spraying
devices whereby crops, weeds and the like may be sprayed with suitable liquids.
With the sprayers at present employed it. frequently happens that by reason
of excess of power applied to the pump the liquid pressure in the discharge
pipes becomes greater than the apparatus can stand the result being the destruc-
tion of the latter.
According to my invention, I apply a safety or relief valve to the discharge
pipe of the pump arranged to open when a safe pressure is exceeded. A pipe.
or conduit leads from this valve back to the supply tank thus avoiding waste.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents.
An Improvement in and relating to Agricultural "Sprayers."
-
I, EDWIN JOHN GOODE, of Elmdon Lodge Farm, Saffron Walden, Essex,
Machinist, 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 agricultural "sprayers" said sprayers consisting of
pumping apparatus, usually worked by horse power, combined with spraying
devices whereby crops, weeds and the like may be sprayed with suitable liquids.
With the sprayers at present employed it frequently happens that by reason
of excess of power applied to the pump the liquid pressure in the discharge
pipes becomes greater than the apparatus can stand the result being the destruc-
tion of the latter.
According to my invention I apply a safety or relief valve to the discharge
pipe of the pump arranged to be opened when a safe pressure is exceeded. A
pipe or conduit leads from this valve back to the supply tank thus avoiding

page_text: The accompanying drawing illustrates in vertical section a relief valve
adapted and arranged for the purposes of my invention.
a
C
is the valve body which connects by the pipe b with the discharge pipe of
the sprayer and by the pipe c with the supply tank. d is the valve. held against
the seating e by the spring f the pressure of which is adjustable by turning
the sleeve by its nut head h said sleeve screwing onto the gland i through
which the valve spindle passes and being held in its adjusted position by the
lock nut . The bore of the gland i is enlarged at the lower end forming a
chamber or stuffing box within which is disposed the rubber ring m which
encircles the valve spindle and is compressed between the latter and the gland
thereby avoiding leakage of water through the latter.
The valve spring is so adjusted that when a safe pressure in the discharge
pipe of the sprayer is exceeded the valve will be opened thus relieving the
pressure and conveying the waste water back to the supply tank of the sprayer
through the pipe or conduit c.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I leclare that what
I. claim is:
1. In an agricultural sprayer, the application to the discharge pipe thereof
of a relief valve, substantially as described and for the purpose set forth.
2. In an agricultural sprayer, the combination with the discharge pipe thereof
of a relief valve and a pipe leading therefrom back to the supply tank of the
sprayer, substantially as described and for the purpose set forth.
Dated this 5th day of Rohruam. D 1000
E. P. ALEXANDER & SON,
19, Southampton Buildings, Chancery Lane, London, W.C.,
Chartered Patent Agents.