Improvements in the Construction and Glazing of Street and other Lamps.
Year: 1885

page_text: Improvements in the Construction and Glazing of Street and
other Lamps.
I WILLIAM SHARP of 94 Greame Street Moss Side, Manchester in the County
of Lancaster Lamp Manufacturer, do hereby declare the nature of my invention
of "IMPROVEMENTS IN THE CONSTRUCTION AND GLAZING OF STREET AND OTHER
LAMPS," to be as follows:-
The object of this invention is an improved construction and glazing of street
and other lamps whereby the light proceeding from the lamp is less obstructed
than formerly, whereby "puttying" the glass in position is dispensed with and
repairing facilitated and whereby increased ventilation is secured.
In carrying out my invention I construct the sheet copper or other bar which
forms the metallic division or angle piece between the adjoining edges of the glass
plates narrower than heretofore and only wide enough to catch the edges of the
glass on either side the angle being filled in with a bar of solid metal "sweated"
or soldered in position and in order to dispense with puttying the glass I substitute
a metallic bar or slide to embrace the inner edges of the glass and which bar fits
into a socket at one extremity by preference the top and which can then be drawn
down into a similar socket at the other extremity, and there be secured or locked
in position by a clamping screw. In this manner the inner edges of the glass are
secured in position-And in order to promote ventilation and to avoid the shadow
formed by the bottom of the lamp, being partially formed of perforated or solid
metal as heretofore, I construct the whole of the centre of the bottom of the lamp
of glass and by preference in a circular form and which glass rests upon the bottom
metallic framework upon a series of projections, surrounded by an annular edging
of perforated metal and thus permit the access of air around the edges of the
circular or other glass plate in addition to the bottom metallic framework being
perforated itself. This glass plate being divided in some cases into two parts so
that one part may only open for lighting purposes. And to promote the egress of
the hot air at the top of the lamp, I affix the top reflector usually formed of
porcelain at a slightly lower level than heretofore so as to permit the hot air to
escape by perforations around its outer edges.
Ou
.
" 100K
JOHN G. WILSON,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
.
Improvements in the Construction and Glazing of Street and
other Lamps.
I WILLIAM SHARP of 94 Greame Street, Moss Side, Manchester, in the County
of Lancaster, Lamp Manufacturer, do hereby declare the nature of my invention
of "IMPROVEMENTS IN THE CONSTRUCTION AND GLAZING OF STREET AND OTHER
LAMPS to be as follows:-
"
The object of this invention is an improved construction and glazing of street
and other lamps whereby the light proceeding from the lamp is less obstructed
than formerly whereby "puttying" the glass in position is dispensed with and
repairing facilitated and whereby increased ventilation is secured.
On the accompanying drawing Fig. 1. is an exterior view; Fig. 2. a transverse
sectional view, and Fig. 3. an inverted plan view of a street lamp embracing my
improvements. Fig. 4. is a half size transverse sectional view of the bottom of the
same lamp, and Fig. 5. is a sectional plan of part of the bottom of the same lamp.
In carrying out my invention I construct the sheet copper or other bars a which
form the metallic divisions or angle pieces between the adjoining edges of the
glass plates 6 narrower than heretofore and only wide enough to catch the edges
of the glass on either side, the angle being filled in (as seen in sectional plan view
Fig. 5) with a bar c of solid metal "sweated or soldered in position and in order
to dispense with puttying the glass I substitute a metallic bar or slide d of a
suitable cross-section to embrace the inner edges of the glass (see Fig. 5a) and
which bar fits into a socket e at one extremity by preference the bottom and can
then be pushed upwards into a similar socket f at the other, or top, extremity
and be secured or locked in position by a clamping screw g as illustrated more
.clearly in Fig. 5º.
In this manner the inner edges of the glass are secured in position whilst any
bar d may be put in or taken out at pleasure and by this means any inexperienced
person may take out and replace with new, any broken squares.
And in order to
promote ventilation and to avoid the shadow formed by the bottom of the lamp
being partially formed of perforated or solid metal as heretofore, I construct the
whole of the centre of the bottom of the lamp (h) of glass and by preference in
, a circular form as seen in Fig. 3. and which glass plate i rests upon the bottom
metallic frame work h upon a series of projections ; surrounded by an annular
edging of perforated metal K and thus permits the access of air around the edges
of the circular or other glass plate in addition to the bottom metallic framework
being perforated itself. This glass plate i being divided in some cases into two
parts m and n so that one part n may only be pivoted and open for lighting
purposes. And to promote the egress of the hot air at the top of the lamp I affix
the top reflector o, usually formed of porcelain, at a slightly lower level than
heretofore so as to permit the hot air to escape by perforations or annular space
left around its outer edge, and as indicated by the arrows p in Fig. 2.
It will be obvious that these improvements are equally applicable to other
descriptions of outside lamps besides street lamps.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what is
claimed in this invention is
1st The improvement in street and other lamps whereby the glass plates are
secured in position without putty and so as not to obstruct the light substantially
as herein before described and illustrated on the accompanying drawing.
2nd The use and application of the inner bars or slides and mode of securing the
same in position substantially as and for the purposes hereinbefore described and
illustrated on the accompanying drawing.
3rd Constructing the whole of the bottom of street and other lamps of glass and
so supporting the same as to facilitate the access of air around the edges substan-
tially as and for the purposes hereinbefore described and illustrated on the
accompanying drawing.
4th The mode of fixing the top reflector so as to promote the egress of hot air
around its outer edge substantially as hereinbefore described and illustrated on the
accompanying drawing.