Improvements in Ships' Ventilators.
Year: 1894

page_text: Date of Application, 27th Feb., 1894
Complete Specification Left, 27th Nov., 1894-Accepted, 23rd Feb., 1895
Improvements in Ships' Ventilators.
I WILLIAM MILLS of Bonners Field of the Town of Sunderland in the
County of Durham Engineer do hereby declare the nature of this invention to be
as follows:--
My invention is for improvements in ships ventilators and I propose to carry it
out in the following manner :-
On the stalk or spindle of the mushroom, lid, or cover there are a series of pins
or projections at different heights or levels and properly spaced. The spindle with
its cover is moved upwards or downwards through a boss in the centre or axis of
the ventilator this boss having arms suitably attached to the combing or cylindrical
part
There is a slot in the boss so as to allow the spindle with the pins upon it to
move upwards or downwards as may be required.
The pins are so spaced as to be in each case the one clear of the top of the boss
and the other clear of the bottom of the boss so as to be in a position to take the
thread or spiral which is formed below the bottom of the boss. So that a small
part of a revolution of the spindle will cause the lower pin to ride on the screw
thread and so tighten the valve or ventilator in position-that is to close the valve
or retain it in any other position as may be desired. The screw thread is arranged
so as to allow the pins to enter or take the screw thread easily.
The thread may if preferred be between the top and bottom of the boss and so
could if preferred tighten on one pin only.
Further I have the mushroom or cover free to turn on the spindle in this manner :-
Above the cover there is a handle on a sliding key or square part of the spindle or
otherwise, so that when the valve is down or close or in the lowest position the
tightening of the rim of the valve is accomplished without any revolution or circular
motion of the rim or joint of the cover." Thus facilitating the opening and closing
of the valve and preventing the material of the joint being torn &c.
The arms of the boss instead of being cast in one piece with the combing may
be rivetted on to combing and well curved so as to give elasticity and some amount
of margin for fitting in position, the curved arms being continued, thus forming a
lug or means of attachment to the combing by rivetting or other means.
Or the arms of the boss instead of being cast in one piece with the combing may
be manufactured of any suitable material separately and then have the combing
cast on to them in any suitable manner or the arms may be formed in the ordinary
manner.
f.
The axis of the ventilator may be vertical or at any inclination or angle.
The whole may be of any suitable material design or pattern.
In this manner the construction as well as the operations are rendered more
efficient.
.:
Dated this 26th day of February 1804.

page_text: 1, WILLIAM MILLS of Bonners Field Sunderland in the County of Durham
Engineer, do hereby declare the nature of this invention and in what manner the
saine is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention is for improvements in ships ventilators and I carry it out in the
following manner :—
On the stalk or spindle of the mushroom, lid or cover there are a series of pins
or projections at different heights or levels and properly spaced. The spindle with
its cover is moved upwards or downwards through a boss in the centre or axis of
the ventilator. This boss having arms suitably attached to the coaming or
cylindrical part of the ventilator.
.
There is a slot or slots in the boss so as to allow the spindle with the pins upon it
to move upwards or downwards as may be required. The pins are so spaced as to
be one clear of the top of the boss and the other clear of the bottom of the boss so
as to be in a position to take the thread or spiral which is formed on the underside
of this boss. So that a small part of a revolution of the spindle will cause the
lower pin or pins to ride on the screw thread or threads and so tighten the valve or
ventilator in position-that is to close the valve or retain it in any other position as
may be required or desired.
The screw thread is arranged so as to allow the pins to enter or take the screw
thread easily.
Further I have as an alternative arrangement the mushroom or cover free to
turn on the spindle in this manner:-Above the mushroom or cover there is a
handle on a sliding key or square part of the spindle or otherwise whilst the spindle
in the part which passes through the mushroom is round. So that when the valve
is down or close or in the lowest position the tightening of the rim of the valve is
accomplished without any revolution or circular movement of the rim or joint of
the cover.
Thus facilitating the opening and closing of the valve or ventilator as
well as preventing the material of the joint being torn or injured.
The axis of the ventilator may be vertical or at any inclination or angle.
The whole may be of any suitable or desired material design or pattern.
In the drawings Sheets No. 1 and 2-No. 1 Fig. 1 is a vertical section through
the ventilator shewing the spindle in elevation when the valve is closed. Fig. 2
Sheet 2 is an enlarged view of the locking screw and pins and Fig. 3 is an enlarged
view in section shewing the independant method of tightening.
In drawing Sheet No. 2 Fig. 1 is a sectional elevation shewing ventilator open
and fixed in position.
In which figures a is the barrel or body of the ventilator-6 is the movable
mushroom or cover for the ventilator and c is the spindle fixed in mushroom cover b
and moving vertically through the boss e on arms d.
°
On this spindle c there are pins f fixed on one side of the spindle and at suitable
distances apart.
The lower pin if required may project on both sides to prevent ventilator being
drawn out.
There is a slot y. in the boss e to allow the spindle with these pins upon it to
pass up and down.
There is also on the lower side of this boss a spiral or part of a screw h on which
the pins are moved by turning the spindle to tighten and to fix the ventilator with
any required degree of opening or to close the valve.

page_text: And the upper side of the bosse is suitably shaped as at i so that should the
spindle become loose in the boss e the projection or shape of the upper surface at i
prevents the pin rising and the ventilator dropping or closing.
The pins tighten on the surfaces h and in this manner :-
The upper surface of boss being a plane at right angles to the spindle or other
suitable shape, and the pin resting on this boss keeps the mushroom up to that
height but the lower part of the boss being a part of a screw thread, the pin f
riding on it during the circular motion tightens on the surfaces h and i when the
valve is open, or on face of valve and the surface h when the valve is close.
The spindle c is fitted with a square neck k or other contrivance to cause the
spindle to turn with the mushroom b.
m is the india rubber or other material let into the face of the mushroom b to
form a water tight joint.
In Fig. 3 the spindle c¹ is made round in the mushroom 6' and this spindle has a
square neck or other suitable shape on the end on which is fixed a suitable
handle. By which means the mushroom may be tightened by turning the handle
without producing any circular motion on the face of the mushroom valve.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
(1.) The method of tightening or fixing the ventilator when close or with any
degree of opening as described in drawing Sheet No. 1 Fig. 1 and 2, in drawing
Sheet No. 2 Fig. 1 and in the Specification.
(2.) The method of tightening without giving circular motion on face of
mushroom as described in drawing Sheet No. 1 Fig. 3 and in the Specification.
Signed this Twenty-fourth day of November 1894.
W. MILLS.