Improvements in or relating to the Mounting of Ships' Side Lights.
Year: 1890

page_text: Date of Application, 27th June, 1890
Complete Specification Left, 20th Oct., 1890-Accepted, 31st Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Mounting of Ships' Side
Lights.
I, TÖNNES ANDREASEN, of 27, George Street, Cardiff, in the County of
Glamorgan, Ships' Store Merchant and Ironmonger, do hereby declare the nature
of this invention to be as follows:-
My invention relates to the mounting of ships' side lights or lanterns in such a
manner that the lantern will practically always maintain a vertical position and
consequently always throw its rays of light in a horizontal direction.
In carrying out my invention I provide a three sided frame having one of its
sides bowed so as to correspond with the horizontal sectional outline of a ship's
side light. This frame I suspend upon gimbals in a similarly shaped frame
supported upon davits connected together by guy ropes or chains. Within the
first named frame I suspend upon gimbals a third similarly shaped frame adapted to
receive the side light. A board or shield extends from one davit to the other to
throw the light in the proper direction.
When applying my invention to vessels having lighthouses for carrying the side
lights, I dispense with the use of the davits and fit the three sided frames in the
light-house which I provide with a plain lens, the dioptric lens being fitted into one
of the three sided frames instead of in the light-house as is usually the case.
Suitable buffers are provided to guard the light from shocks.
T1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to the Mounting of Ships' Side
Lights.
I, TONNES ANDREASEN, of 27, George Street, Cardiff, in the County of
Glamorgan, Ships' Store Merchant and Ironmonger, 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 :-
My invention relates to the mounting of ships' side-lights or lanterns in such a
manner that the lantern will practically always maintain a vertical position and
consequently always throw its rays of light in a horizontal direction.
In carrying out my invention I support or carry the side-light in gimbals in the
manner hereinafter more particularly described, and though my invention is
applicable to any of the usual forms of side-lights I have found that it can be most
advantageously carried out in practice by employing a side-light of the particular
form and construction hereinafter described.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawings, in which :-
Figure 1 is an elevation of my arrangement of gimbals for supporting a ship's
side-light; and,
Figure 2 is a plan of the same :
Figure 3 is a plan of the improved ship's side-light which I find it advantageous
to employ in connection with my improved mounting:
Figure 4 is a horizontal section; and,
Figure 5 a vertical section of the side-light.

page_text: In Figures 1 and 2 a is a frame or bucket into which a ship's side-light may be
placed, the said frame being provided on one side with an opening a', as shewn most
clearly in Figure 1, through which the lens of the lantern is visible, and on its
underside with openings a², a2 through which the air for supporting the combustion
of the lamp passes; is a recess formed at one part of the upper edge of the frame
or bucket to receive a projection upon the lantern, (which projection is marked on
the side-light shewn in Figure 3), in order to ensure the lantern being placed in its
proper position relatively to the said bucket or frame.
c is the usual screen which is employed in conjunction with a ship's side-light,
and d, d are the stanchions upon which the same is mounted.
The frame or bucket is carried upon gimbals, which gimbals are also carried in
bearings e, e upon the screen c. I find it advantageous to employ segmental
gimbals f, g, so that no obstruction is placed before the lens as would be the case
if rings were employed. It is of course to be understood that if the lens is placed
below the gimbals then a couple of gimbal-rings may be employed. This arrange-
ment, however, is not so advantageous as that described, for the reason that owing
to the greater length of lamp below the gimbals more space would be required than
if mounted as above described, to allow of the requisite movement of the lamp
during the rolling of the ship. When the bucket or frame is mounted as shewn, it
is preferably weighted with lead or other suitable material to ensure its hanging
vertically.
It is obvious that the arrangement of gimbals hereinbefore described is very
advantageous for use in cases where the lanterns, instead of being arranged in
conjunction with screens, are placed in what are known as light-houses upon a
ship's deck.
If it is desired that the side-lights should remain stationary it is obvious that the
gimbals may be locked, for instance, by means of a pin passed through the
segments, 9 and the screen e, as indicated by dotted lines in Figure 2; any other
suitable means may, however, be used for the purpose.
I will now describe by reference to Figures 3, 4 and 5 the lantern I find it
advantageous to employ with my gimbal arrangement. h indicates the body of the
lantern, provided with the door i for affording access to the interior thereof and
with the lens j; k the dome and the head of the lantern.
m is the lamp proper and n is the reflector, which reflector is made in two
parts n', n², the former being connected to the body of the lamp whilst the latter is
connected to the door. The object of thus constructing the reflector in two parts
is to provide for reflecting the light more forward than reflectors as ordinarily
constructed.
The reservoir m¹ of the lamp m is provided with a series of holes m² through
which the air for supporting the combustion of the flame passes, thus tending
to maintain this part of the lamp as cool as possible. The said reservoir is
located in a tubular aperture m³ near the bottom of the lantern, and the air for
supporting the combustion passes through the openings h¹, h¹ in the body of the
lantern in the direction of the arrows, as shewn in Figure 5.
0, 0, 0, o are hollow conc-frustums which I provide for preventing the
admission of wind or water into the lantern: the frustums o, o, o being secured
at their larger ends inside the head of the lantern, in which near the bases of
the frustums are holes p, p for allowing the escape of the products of combustion
and of any water which may enter the head of the lantern. It will be obvious
that any wind passing through the holes p, p will be directed upwards so as not to
interfere with the burning of the lamp. The cone-frustum o¹ is secured around
the base of the dome in which holes p', p¹ for a similar purpose to that of the
holes P are provided.
7 is a double deflecting cone which is supported at the smaller end of the
frustum o so as to contract the opening thereof and to direct the products of
combustion from the flame in such a manner that they will pass around the
cone and so tend to prevent any down draught. The use of this cone frustum o'

page_text: in addition to assisting in preventing a down draught also serves to prevent the
dome k of the lamp from becoming overheated.
r is the lug which is used for the purpose herein before described.
Having now particularly described both my improvements in ships' side-lights
and also my improvements relating to the mounting of the same and thus having
ascertained the nature of my said invention and in what manner the same is to
be performed, I declare that what I claim is :-
1. Mounting a ship's side-light upon gimbals, substantially as, and for the
purpose, described.
2. The combination of a bucket or frame in which a ship's side-light can be
placed with gimbals upon which the said bucket or frame is free to move, the
said gimbals being of segmental shape so as not to interfere with the light
emitted from the lantern, substantially as described.
3. The combination of parts forming the improved mounting or gimballing-for
ship's side-lights arranged and operating substantially in the manner hereinbefore
described and illustrated in Figures 1 and 2 of the accompanying drawings.
4. In a ship's side-light mounted upon gimbals substantially as described a series
of hollow cone-frustums secured at their larger ends to the lantern and having
adjacent to their bases a series of holes, all substantially as, and for the purpose,
described.
5. In a ship's side-light mounted upon gimbals substantially as described and
having a series of cones such as 0, 0, 0, 0, the combination of the double
deflecting cone V substantially as described.
6. In a ship's side-light mounted upon gimbals substantially as described
constructing the reflector in sections, substantially in the manner described.
7. A ship's side-light mounted upon gimbals substantially as described the
reservoir of the lamp of which is provided with a series of holes or passages,
substantially as, and for the purpose, described.
8. A ship's side-light mounted upon gimbals substantially as described and
consisting of the parts constructed and arranged substantially in the manner
hereinbefore described and illustrated in Figures 3, 4 and 5 of the accompanying
drawings.
Dead this 20th dow of October 1890
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.