A NEW OR IMPROVED FRESH AIR INJECTOR OR DOWN-CAST WATER-TIGHT VENTILATOR
Year: 1883

page_text: LETTERS PATENT to Sampson Low Junior B.A. Cantab. F.M.S. of 4 Great
James Street Bedford Row in the County of Middlesex for an Invention of
"A NEW OR IMPROVED FRESH AIR INJECTOR OR DOWN-CAST WATER-TIGHT
VENTILATOR"
PROVISIONAL SPECIFICATION left by the said Sampson Low, Junior, at
the Office of the Commissioners of Patents on the 7th March 1883.
SAMPSON LOW Junior B.A, Cantab F,M,S, of 4 Great James Street Bedford
Row in the County of Middlesex, "A NEW OR IMPROVED FRESH AIR INJECTOR
OR DOWN-CAST WATER TIGHT VENTILATOR
ן.
This new or improved injector or ventilator is specially designed for supplying a
continuous stream of fresh air to ventilate any compartment of a ship vessel or
other place without admitting any water.
It consists of several essential parts viz, a "suction-head" to which is fixed a
shaft provided with a "water-course" and an "air-course."
At the lower end of the "water-course" a syphon exit is placed for the water
this syphon exit consists of a horizontal U shaped tube connected with a straight
vertical pipe (which is fitted with a spheroidal floating valve) leading into a vessel
containing water.
This vessel is provided with an over flow pipe through which any water entering
the shaft of the ventilator is (owing to its own downward pressure) carried off.
When not in action (or when no water is entering the horizontal U shaped tube
from the water-course) the buoyancy of the spheroidal floating valve prevents the
passage of any air (owing to the upward pressure exerted by the water in the
vessel on the spheroidal floating valve which then presses against the lower
opening of the vertical pipe)*
Thus all air entering the suction-head is forced down the "air-course."

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Sampson Low, Junior, in the Great Seal Patent Office on the
7th September 1883.
SAMPSON LOW Junior B.A. Cantab. F.M.S. of 4 Great James Street Bedford
Row in the County of Middlesex "A NEW OR IMPROVED FRESH AIR INJECTOR
OR DOWN-CAST WATER TIGHT VENTILATOR
"
This new or improved injector or ventilator is especially designed for supplying
a continuous stream of fresh air to ventilate any compartment of a ship vessel or
other place without admitting any water.
It consists of several essential parts, viz, a "suction-head" to which is fixed a
shaft provided with a "water-course" and an "air-course"
"
At the lower end of the "water-course a syphon exit is placed for the water,
this syphon exit consists of a horizontal U shaped tube connected with a straight
vertical pipe (which is fitted with a spheroidal floating valve) leading into a vessel
containing water.
This vessel is provided with an overflow pipe through which any water entering
the shaft of the ventilator is (owing to its own downward pressure) carried off.
When not in action (or when no water is entering the horizontal U shaped tube
from the water course) the buoyancy of the spheroidal floating valve prevents the
passage of any air owing to the upward pressure exerted by the water in the
vessel on the spheroidal floating valve which then presses against the lower opening
of the vertical pipe.
Thus all air entering the suction-head is forced down the "air course
"
And in order that my invention may be clearly understood and readily carried
into effect I will proceed to describe the Drawing hereto annexed which shows in
vertical section a ventilator arranged in accordance with my improvements.
"
This improved down-cast ventilator consists of the following essential parts, viz,
"suction head" ABCD to which is fixed a shaft provided with a water-
course "D. E. F. G and an "air course DEFSL.
a
"
At the lower end of the water course is placed a "syphon exit" for the water,
this syphon exit consists of a pipe R. (fitted at its lower end with a spheroidal
floating valve) leading into a vessel J. I. K. containing water.
This vessel is provided with an overflow pipe O through which any water
entering the shaft of the ventilator is carried off.
When not in action (i.e. when no water is entering the vertical pipe R from the
water-course D. E. F. G.) the buoyancy of the spheroidal floating valve prevents
the passage of any air owing to the upward pressure exerted by the water, in the
vessel J. I. K. on the spheroidal floating valve which then presses against the
lower opening of the vertical pipe R.
Thus all air entering the "suction head" A. B. C. D. is forced down the air
course DE F. S. L.
Having thus described the nature of my invention and the manner of performing
or carrying the same into practice I would remark that I make no claim to any
of the parts separately which are well known and in common use But what I
claim is
The improved arrangement and construction of down-cast fresh air injectors or

page_text: ventilators arranged to act substantially ¡in_the_manner and for the purposes
herein before described and represented in the Drawing hereto annexed.
In witness whereof I the said Sampson Low, Junior, have hereunto set my
hand and seal this Sixteenth day of August in the year of our Lord One thousand
eight hundred and eighty three.
SAMPSON LOW JUN BA. FMS. (LS)