AN IMPROVED FAN OR VENTILATOR FOR VENTILATING MINES TUNNELS PURLIC AND PRIVATE BUILDINGS. ALSO FOR DRIVING BLAST FURNACES AND :
Year: 1883

page_text: LETTERS PATENT to Frederick Leslie Jeyes of 32 Sussex Street South
Belgravia in the County of Middlesex .Civil Engineer, for an Invention of
AN IMPROVED FAN OR VENTILATOR FOR VENTILATING MINES TUNNELS
PURLIC AND PRIVATE BUILDINGS. ALSO FOR DRIVING BLAST FURNACES AND
:
PROVISIONAL SPECIFICATION left by the said Frederick Leslie Jeyes at
the Office of the Commissioners of Patents on the 22nd March 1883.
FREDERICK LESLIE JEYES of 32 Sussex Street South Belgravia in the County
of Middlesex. Civil Engineer. "AN IMPROVED FAN OR VENTILATOR FOR VENTI-
LATING MINES, TUNNELS, PUBLIC AND PRIVATE BUILDINGS, ALSO FOR DRIVING
BLAST FURNACES AND CAUSING MOVEMENT IN AIR OR GASES AND FOR OTHER
PURPOSES."
}
The invention consists of a Fan or Ventilator revolving round a shaft and
receiving the air parallel to its axis and not at right angles to it.
The Fan is made up of two or more blades or vanes constructed in sheet iron or
otherwise as may be most desirable, but the whole blade or vane may be divided
horizontally or vertically into to or more parts, such parts not being necessarily
in one and the same plane, but in different planes and at different angles and are
fixed in arms radiating from a boss, such arms having at their bases circular plates
or flanges furnished with circurlar slots into which studs screwed into the boss work,
the circular plates or flanges fitt into recisses made in the boss so that the blades
or vanes can be fixed by screwing down a nut on the said studs at any required
angle or at that angle which is most advantageous for the working of the Fan or
Ventilator
The Fan or Ventilator may receive its motion either by a strap and pulley or.
direct from an engine or otherwise.
The Fan or Ventilator is mostly and will be generally surrounded by a cylinder
In my final specification filed drawings will further explain the invention

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederick Leslie Jeyes in the Great Seal Patent Office on the
21st September 1883.
"
FREDERICK LESLIE JEYES of 32 Sussex Street South Belgravia in the County
of Middlesex Civil Engineer. AN IMPROVED FAN OR VENTILATOR FOR VENTI-
LATING MINES, TUNNELS, PUBLIC AND PRIVATE BUILDINGS, ALSO FOR DRIVING
BLAST FURNACES AND CAUSING MOVEMENT IN AIR OR GASES AND FOR OTHER
PURPOSES."
This invention consists of a Screw Fan or Ventilator fixed to a shaft and
capable of revolving therewith and receiving the air parallel to its axis and dis-
charging it in the same direction and it is thus distinguished from ordinary fans
which drive the air radially or at right angles thereto
The fan is formed of two or more blades or vanes constructed of sheet iron or
other suitable material. The whole of the screw blade is in some cases divided
transversely or radially into two or more parts, such parts not being necessarily in
one and the same plane, but in different planes and at different angles relatively
to each other. The blades are fixed on arms radiating from a Boss, such arms
having at their bases circular plates or flanges furnished with circular slots through
which studs screwed into the boss project and carry nuts at their outer ends-
The circular plates or flanges fit into recesses made in the boss, so that the blades
or vanes can be fixed by screwing down the nut on the studs at any required
angle or at the angle which is most advantageous for the working of the Fan or
ventilator In cases where the blades are constructed of several parts as before
mentioned every such part is provided at the back edge with a flanged collar and
set screw, the radiating arm passing through such collars and the set screw
allowing of the part or parts of the blades being fixed at any required angle.
Under these circumstances the radiating arm is screwed into the boss or otherwise
fixed as may be expedient-This mode of fixing the blades also applies when
formed in one piece
The van or ventilator is driven either by a strap and pulley, or directly from' an
engine or by any other suitable means
The Fan is in some cases surrounded by a cylinder
Figure 1 is a front elevation of the fan shewing four undivided blades or vanes
marked a, a¹. a². a³ respectively. Figure 2 is a side elevation of Figure 1.-
Figure 3 is a side elevation of the fan showing the blades a, a¹. a². a³ divided
transversely into three parts 1. 2 and 3 and set at angles representing a pitch
of a screw two and a half times the diameter calculated from the outer edge----
Figures 4 and 5 are a plan and elevation respectively of a mode of attaching the
individual blades to the arms and boss-A is the arm with the flange B attached
to the end thereof in which flange are circular slots c c¹. c²-D is the boss which
has four circular recesses e e¹. e. e. into which the flanges at the end of the arms
fit-studs ff. f2 are screwed into the boss corresponding into position with the
circular slots of the flanges-Figs. 6 and 7 are a plan and elevation respectively of
- the manner in which the blades are fixed to the radiating arms, when they are
divided transversely or otherwise into two or more parts. F is the arm screwed
into the boss d-H is a flanged collar with a set screw J., which is attached to the
back of each blade, the arm F passes through the collar H and after the blade has
been set at the required angle is tightened up by the set screw J.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I claim :-
1. The use and manufacture of Fans or Screws each blade thereof being composed

page_text: of a single adjustable plate secured to the boss and shaft in the manner and for
the purposes substantially as herein before described and shewn on the Drawings
Figures 1. 2. 4. 5 and 6.
2. The use and manufacture of fans or screws, each blade thereof being composed
of several adjustable plates secured to the boss and shaft and to each other in the
manner and for the purposes substantially as herein before described and shewn on
the drawings Figures 3. 4. 5. 6 and 7.
3 The general arrangement and combination of parts together respectively
forming my improvements in Fans or Ventilators for ventilating mines, tunnels,
public and private buildings, also for driving blast furnaces, and causing movement
in air or gases and for other purposes substantially as hereinbefore described and
shewn on the drawings Figures 1 to 7.
In witness whereof I the said Frederick Leslie Jeyes have hereunto set my
hand and seal this twentieth day of September in the year of our Lord 1883.
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