Improvements in Lenses Employed as "Deck Lights," and in Frames and Fittings Connected with such Lenses.
Year: 1888

page_text: Date of Application, 19th Oct., 1888
Complete Specification Left, 18th July, 1889-Accepted, 31st Aug., 1889
PROVISIONAL SPECIFICATION.
Improvements in Lenses Employed as "Deck Lights," and in Frames
and Fittings Connected with such Lenses.
I ROBERT WILSON of 181 Queen Victoria Street in the City of London, Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
The object of this Invention is to remedy a serious defect in ordinary decklight
frames that is to say those in which lenses are simply bedded in a rebated frame and
which invariably leak owing to the straining of the Ship or Vessel the cement in
which the lenses and frames are bedded cracks and leakages follow.
Now according to this my said Invention I provide a special construction arrange-
ment and construction of lens-frame and packing as follows:
Each lens below its surface is provided with an outer and projecting shoulder or
flange. The frame carrying the lens has a double step or rebate. On the bottom
step or rebate is placed a strip of India rubber, asbestos, or other packing-the lens
is then placed in position within the frame-the under surface of the shoulder or
flange of the lens resting upon the packing a strip of similar packing is next laid
upon the upper surface of the shoulder or flange of the lens of such thickness that its
upper surface is slightly higher than the level of the upper of the two steps or rebates
of the frame.
There is now a recess around the lens formed by the upper step or rebate of
the frame and the rebate of the shoulder or flange of the lens which recess is
filled by a covering frame resting on the upper step and on the packing. The
covering frame is then to be screwed down and secured flush with the upper
surface of the lens and the upper surface of the outer frame by means of screws
or bolts the tighting up of which nips and compresses the packing on the upper
and lower surfaces of the shoulder or flange of the lens thereby hermetically seals
and excludes passage of water and also provides the requisite elasticity or play to
compensate for the expansion and contraction occasioned either by variation of
temperature or through the straining of the Ship or Véssel.
The Invention is applicable to any form of lens and single or to any required
number of lenses may be supported packed hermetically and secured within one
outer frame there being the requisite cross stepped bars, packing and covering
frames as described.
Dated this 18th day of October 1888
WALTER BRIERLEY,
Town Hall Buildings, Halifax, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lenses Employed as "Deck Lights," and in Frames
and Fittings Connected with such Lenses.
1, ROBERT WILSON of 181 Queen Victoria Street, in the City of London, Mechanical
Engineer, 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:
The object of this Invention is to remedy a serious defect in ordinary deck-light
frames, that is to say those in which lenses are simply bedded in a rebated frame and
which invariably leak owing to the straining of the ship or vessel the cement in
which the lenses and frames are bedded, cracks and leakages follow.

page_text: Now according to this my said Invention I provide a special construction, arrange-
ment and construction of lens, frame and packing as follows:-
Each lens below its surface is provided with an outer and projecting shoulder or
flange. The frame carrying the lens has a double step or rebate, on the bottom
step or rebate is placed a strip of India-rubber, asbestos or other packing, the lens
is then placed in position within the frame, the under surface of the shoulder or
flange of the lens resting upon the packing a strip of similar packing is next laid
upon the upper surface of the shoulder or flange of the lens of such thickness that
its upper surface is slightly higher than the level of the upper of the two steps of
rebates of the frame.
There is now a recess around the lens formed by the upper step or rebate of the
frame and the rebate of the shoulder or flange of the lens which recess is filled by a
covering frame resting on the upper step and on the packing.
The covering frame is then to be screwed down and secured flush with the upper
surface of the lens and the upper surface of the outer frame by means of screws or
bolts the lighting up of which nips and compresses the packing on the upper and
lower surfaces of the shoulder or flange of the lons thereby hermetically seals and
excludes passage of water and also provides the requisite elasticity or play to com-
pensate for the expansion and contraction occasioned either by variation of temperature
or through the straining of the ship or vessel.
The Invention is applicable to any form of lens and single or to any required
number of lenses may be supported, packed hermetically and secured within one outer
frame there being the requisite cross stepped bars, packing and covering frames as
described.
Such being the nature and object of this my said invention, the following is a
complete description of same reference being had to the accompanying drawings in
which :-
Fig. 1 is a sectional elevation of deck lights and frame in position.
Fig. 2 is a plan of the same.
Fig. 3 is an oblique view of the holding frame.
Fig. 4 is an oblique view of the covering frame.
Fig. 5 is an oblique view shewing the formation of the rebate.
Each lens 1 below its surface 2 is provided with an outer and projecting shoulder
or flange 3. The frame 4 carrying the lens 1 has a double step or rebate 5. On the
bottom step or rebate 6 is placed a strip of india-rubber, asbestos, or other packing 7,
the lens 1 is then placed in position within the frame 4 the under surface of the
shoulder or flange 3 of the lens 1 resting upon the packing 7 a strip of similar.
packing 8 is next laid upon the upper surface of the shoulder or flange 3 of the
lens 1 of such thickness that its upper surface 2 is slightly higher than the level of
the upper one of the two steps 5 of the rebates of the frame 4.
There is now a recess around the lens 1 formed by the upper step 5 of the rebate
of the frame 4 and the rebate of the shoulder or flange 3 of the lons 1 which recess is
fillel by a covering frame 10 resting on the upper step and on the packing 8.
The covering frame 10 is then to be screwed down and secured flush with the
upper surface 2 of the lens 1 and the upper surface of the outer frame 4 by means
of screws or bolts 11 the tightening up of which nips and compresses the packing 7-8
on the upper and lower surfaces of the shoulder or flange 3 of the lens 1 thereby
hermetically seals and excludes passage of water and also provides the requisite elasticity
or play to compensate for the expansion and contraction occasioned either by variation
of-temperaturo or through the straining of the ship or vessel, 9 is a section of the
deck in which the frame 4 is carried.
The invention is applicable to any form of lens and single or to any required number
of lenses may be supported, packed hermetically and secured within one outer
frame: there being the requisite cross stepped bars, packing and covering frames as
described.

page_text: 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 :-
A flanged lens, a carrying frame such as 4, the packings 7-8 and a holding
frame 10 all in combination for purpose described and substantially as illustrated by
annexed drawings, or any mere modification of same.
יהוו יד
LOON
LAANT
ROBERT WILSON.
By his Agent, Walter Brierley,
Central Chambers, Halifax.
ROBERT WILSON.
By his Agent, Walter Brierley,
Central Chambers, Halifax.