IMPROVEMENTS IN THE MANUFACTURE OF HOLDERS FOR INCANDESCENT ELECTRIC LAMPS AND OF OTHER ARTICLES COMPOSED OF GLASS WITH METAL FITTINGS
Year: 1884

page_text: I ALFRED SWAN of Gateshead-on-Tyne in the County of Durham Engineer
do hereby declare the nature of said Invention for "IMPROVEMENTS IN THE
MANUFACTURE OF HOLDERS FOR INCANDESCENT ELECTRIC LAMPS AND OF OTHER
ARTICLES COMPOSED OF GLASS WITH METAL FITTINGS" to be as follows:-
My Invention has for its principle object to enable the holders of Electric lamps
to be manufactured of glass by casting or moulding the metal fittings being secured
therein or thereto in the process of casting or moulding.
According to my Invention I form the metal fittings of a dove tail shape with
projections recesses ribs or grooves or the like on their exteriors and I place and
support these metal fittings in the moulds in the position which they are to occupy
in the finished casting or moulding and I then pass the molten glass into the
moulds so that it encloses the metal fittings or the portions thereof which are to be
secured in the glass the aforesaid dovetail or other formation of the exteriors of
the said metal fittings causing them to be firmly held in place in the glass casting
or moulding when it becomes hard. I may make the holders of any convenient
form for example they may be in parts the upper one of which is fitted with means
for attaching the holder to the bracket or other support and with attachments for
the lead wires and contact pieces for making contact with other contact pieces
carried by the lower portion of the holder the last named contact pieces receiving
the terminal wires of the lamp various designs and modes of connecting the parts.
My Invention is applicable generally to the manufacture of articles of Glass
with metal fittings which may be secured therein by casting or moulding.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said Alfred Swan,

page_text: I, ALFRED SWAN, of Gateshead-on-Tyne, in the County of Durham, Engineer,
do hereby declare the nature of my invention for "IMPROVEMENTS IN THE
MANUFACTURE OF HOLDERS FOR INCANDESCENT ELECTRIC LAMPS AND OF OTHER
ARTICLES COMPOSED OF GLASS WITH METAL FITTINGS" and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
My Invention has for its object to enable the holders of Electric lamps to be
manufactured of Glass commonly so called or analogous glassy material such as
the material known as "vitrite" by casting or moulding and securing the metal
fittings therein or thereto by the process of casting or moulding the said glass or
the like.
According to my Invention I form the metal fittings of a dove-tail shape with
projections recesses ribs or grooves or the like on the parts to he enclosed in the
glass or the like and I place and support these metal fittings in the moulds in the
position which they are to occupy in the finished casting or moulding and I then
pass the molten glass or the like into the moulds so that it encloses the metal
fittings by surrounding or interlocking with the portions thereof which are to be
secured in the glass or the like the aforesaid formation of the exteriors of the said
metal fittings causing them to be firmly held in place in the casting or moulding
when it becomes hard; I may make the holders of any convenient form for
example they may be in parts, the upper one of which is fitted with means for
attaching the holder to the bracket or other support, and with attachments for the
lead wires and contact pieces for making contact with other contact pieces carried
by the lower portion of the holder, the last named contact pieces receiving the
terminal wires of the lamp. Various designs of holder and modes of connecting
the parts may be adopted.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
The drawings illustrate a holder made in parts as an example.
The part to be secured to the bulb of the Lamp is shewn at Figure 1 in plan
and transverse sections at right angles to each other, and consists of a body part A
of glass or the like. The metal fittings b b are formed with ear pieces 6 b and are
placed and held in the mould for the part A, and on the glass or the like being
pressed into the mould, the said metal parts b b are securely fastened in position in
the part A. The part C (Fig 2) to which the main wires are connected and which
is secured to the bracket or the like, is similarly formed by casting or moulding
the Glass or the like around the metal fittings consisting of a screw collar e for
securing to the bracket or the like, and split screws d d between which the main
wires h h (Fig 4) are secured and fixed in any suitable way. The fittings d d

page_text: and ee are provided at the parts where they are surrounded by the glass or the
like with projections or grooves or their equivalents, by which they are held firinly
in position when the glass or the like is cast or pressed around them as described
with regard to the part A. The parts A and C may be secured together (and the
bulb be consequently secured in place) by any convenient means. In the Drawings
I have shown a means consisting of a collar piece F. (Figure 3) slidden or sprung
upon the part C, and engaged with the part A in any suitable way, as indicated in
Figure 4; but under this present Patent I claim no particular way of joining the
parts of the holders, nor do I limit myself to making the holders in two separate
parts as shewn, as they may be made in one piece or in two or more pieces as may
be desired. The projections grooves or the like on or in the parts of the fittings
surrounded by the glass or the like may be of any kind which will servo to secure
the fittings in position in the glass or the like. The fittings may be of any
description which will answer the purpose for which they are destined.
The holders or parts of holders made as hereinbefore described may, or may
not, be permanently secured to the lamp by cementing or otherwise as may be
desired.
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 Forming the holders or parts of the holders for incandescent electric
lamps provided with metal fittings, by casting or moulding or pressing glass or the
like around metal fittings formed at the parts which are situated within or
surrounded by the said glass or the like with projections or grooves or their
equivalents, substantially as herein before described.
Second: A holder or parts of a holder for incandescent electric lamps consisting
of glass or the like, cast, moulded, or pressed around metal fittings formed at the
parts which are situated within, or surrounded by the said glass or the like, with
projections or grooves or their equivalents whether or not the said holder or
a part thereof be permanently fixed to the lamp substantially as hereinbefore
described.
L ฯล
•