provements in and relating to Protecting Shields for Incandescent Electric Lamps and the like.
Year: 1898

page_text: Date of Application, 31st Mar., 1898
Complete Specification Left, 30th Dec., 1898-Accepted, 18th Feb., 1899
PROPICIONAL SPECIFICATION
mprovements in and relating to Protecting Shields for Incandescent
Electric Lamps and the like.
I, JAMES DEWAR, of 11, Regent Moray Street, Overnewton, in the County of
the City of Glasgow, Mechanical and Electrical Engineer, do hereby declare the
nature of my invention to be as follows:-
-
This invention has reference to improvements in and relating to shields or
hoods for protecting incandescent electric lamps and the like, such as those lights
which have their supporting base frames suspended or fixed to brackets in the
holds or bunkers of vessels or passages or alleys leading to these, and which
require to be protected while the operations of loading or unloading the vessels
are proceeding.
According to my improvements I form the shields or hoods in two or more
segmental parts, and so hinged or oscillated from the base frame of lamp holder
that they will be retained either in their opened up position to expose the light,
or in their closed position to obscure the light and protect the lamp, or in any
intermediate angled position.
Under one arrangement in which the shield is made in the form of two segments,
these would be of a semicircular dome shape facing each other so that when they
came together they would cover up the outer glass globe of incandescent lamp.
These segments would be cast or formed with a projecting arm or rib at the centre
of their base rim part on which would be cast or mounted at right angles trans-
verse spindles. These spindles would pass through recesses in the cheek frames
carrying the lamp fittings, and the projecting arms of segments would be located
between the cheek frames. Blade springs with U shaped or doubled back ends
would pass outside each cheek frame, and the spindles which would be formed
with square ends would be mounted in these U shaped parts of springs. The
springs would thus retain the segments in their opened out or in their closed in
positions, or the segments may be placed at an angle of 45 degrees or any other
angle, or one only of the segments may cover up the globe part of lamp so as to
throw the light in the direction desired and obscure the other part or parts.
Screw pins may be fitted through the cheek plates of base frame so as to pro-
ject across arms of segments and lock these either in their swivelled out or
closed in positions.
By a modified arrangement U shaped springs may be used near the ends only
of these spindles within a covered in part of base frame, and the segments be
locked in their closed in position by a screw pin working through a screwed hole
5 in a projecting snug in one segment and into a recess in a snug in the other
segment. Instead of having central projecting arms the spindles may be formed
in one with edge extensions of the segments. When the shield is formed in three
or more segments each of these would have separate spindles to oscillate on.

page_text: The segments would be painted white or enamelled on their inner surface, so as
to act as reflectors of the light.
By these improvements head room is saved in the holds or parts where these
shields are fitted, as the segments never fall below their normal bottom level in
opening or closing.
Dated the 30th day of March 1898
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Protecting Shields for Incandescent
Electric Lamps and the like.
I, JAMES DEWAR, of 11, Regent Moray Street, Overnewton, in the County of
the City of Glasgow, Mechanical and Electrical Engineer, do hereby declare the
nature of my invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement, that is
to say:-
-
This invention has reference to improvements in and relating to shields or
hoods for protecting incandescent electric lamps, such as those lights which have
their supporting base frames suspended or fixed to brackets in the holds or
bunkers of vessels or passages or alleys leading to these, and which require to be
protected while the operations of loading and unloading the vessels are proceed-
ing. The shields are also applicable for use in connection with small are lamps.
According to my improvements I form the shields or hoods in two or more seg-
mental parts, and so hinged or oscillated from the base frame of lamp holder that
they will be retained either in their opened up position to expose the light, or in
their closed position to obscure the light and protect the lamp, or in any inter-
mediate angled position.
And in order that my said invention and the manner of carrying same into
practice may be properly understood, I have hereunto appended a sheet of explan-
atory drawings in which the same reference letters are used to indicate correspond-
ing parts. Figures 1 and 2 are elevations at right angles to each other showing
a protecting shield as fitted with one arrangement of my improvements. Figures 3
and 4 are views corresponding to Figures 1 and 2, but showing a modified arrange-
ment of my improvements, and Figure 5 is a plan view corresponding to Figure 3,
but with the base cover removed.
Referring to these drawings:-
-
Under one arrangement in which the shield is made in the form of two seg-
ments A as shown in Figures 1 and 2 these would be of a semicircular dome
shape facing each other so that when they came together they would cover up the
outer glass globe a of incandescent lamp. These segments A would be cast or
formed with a projecting arm or rib A¹ at the centre of their base rim part on
which would be cast or mounted at right angles transverse spindles A². These
spindles A would pass through recesses in the projecting cheek plates B¹ of the
base frame carrying the lamp fittings, and the projecting arms A¹ of segments A
would be located between the checks B¹. Blade springs with U shaped or
doubled back ends would pass outside each cheek plate B', and the spindles A²
which would be formed with square ends would be mounted in these shaped
parts of springs b. The springs would thus retain the segments A in their

page_text: opened out position as shown in dotted lines in Figure 1, or in their closed in
position, or the segments may be placed at an angle of 45 degrees or any other
angle, or one only of the segments A may cover up the globe part of lamp so as
to throw the light in the direction desired and obscure the other part or parts.
A projecting flange part A would be formed on one of the segments so as to
make an efficient overlapping joint in the closed position.
Screw pins C may be fitted through the cheek plates B' of base frame B so as
to project across arms A¹ of segments A. and lock these either in their swivelled
out or closed in positions.
Instead
By a modified arrangement the U shaped springs b may be used near the ends
only of these spindles within a covered in part of base frame B and the
segments A may as shown in Figures 3 to 5 be locked in their closed in posi-
tion by a screw pin C working through a screwed hole in a projecting snug C
in one segment and into a recess in a snug C3 in the other segment.
of having central projecting arms A' as shown in Figures 1 and 2 the spindles A²
may be formed in one with edge extensions A+ of the segments A and have square
parts formed at the centre where the springs b would be fitted as shown in
Figures 3 to 5. When the shield is formed in three or more segments each of
these would have separate spindles to oscillate on.
The segments would be painted white or enamelled on their inner surface, so as
to act as reflectors of the light.
By these improvements head room is saved in the holds or parts where these
shields are fitted, as the segments A never fall below their normal bottom level in
opening or closing.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
First. Protecting shields for incandescent electric lamps and the like, formed
in segmental parts, and so hinged from the base frame of holder that they will
be retained either in their opened up position to expose the light, or in their
closed position to obscure the light and protect the lamp, or in any intermediate
angled position substantially as set forth.
Second. In connection with protecting shields for incandescent electric lamps
and the like, the combination with the shields of spindles and springs, substan-
tially as set forth.
Third. The arrangement in combination of the protecting shields and fittings,
of incandescent electric lamps and the like, substantially as herein described in
reference to and shown in the accompanying drawings.
Doted the 20th dox of December 1898
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.