Improvements in the Manufacture of Shades or Glasses for Gas and other Lights.
Year: 1887

page_text: Date of Application, 3rd Mar., 1887.
Specification Accepted, 5th Apr., 1887.
Improvements in the Manufacture of Shades or Glasses for Gas
and other Lights.
I, EDWARD MOORE of Tyne Flint Glass Works, South Shields in the county of
Durham, Glass Manufacturer, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention consists in the application of the art of pressed glass-making to the
production of shades or glasses for use in connection with gas and other lights;
whereas such shades or glasses have hitherto been exclusively made by blowing, that
is to say either blown handmade or blown in a mould, they are according to the
present invention made in a press; they may be shaped as a shallow, medium or deep
dish, a shallow medium or deep basin or they may have any of the shapes of inverted
conic sections and may be of any size convenient to the special purpose for which it is
intended they should be used.
In the accompanying drawings Figures 1 and 2 represent side views of two
different patterns and shapes of shades or glasses constructed according to my
invention. Figure 3 represents a vertical cross section of a mould employed in the
manufacture of shade or glass represented at Figure 1 and Figure 4 represents a vertical
cross section of a mould employed in the manufacture of glass or shade represented at
Figure 2.
The opening a¹ in the bottom of the shade or glass a may be produced by the means
represented at Figure 3, that is to say by cutting out the bottom of the shade or glass
to the required size in the act of pressing the shade or glass. In this case the plug or
plunger is formed with a projection or punch on its bottom and the mould c is
provided with a moveable bottom c¹ which when not depressed by the plunger bis
raised to the position shown in the drawings by the weighted lever d.
Thus the plug or plunger b acts in combination with the mould c to produce the
shade or glass with any desired pattern thereon and the projection or punch 6¹ acts in
combination with the hole in the bottom of the mould c to cut the hole or opening a¹
in the bottom of the shade or glass a; in such action the projection or punch &¹ forces
down the moveable bottom c¹ with the portion of glass cut out from the bottom of the
shade or glass between them. The plug or plunger b is then raised, and the moveable
bottom cis also raised by the weighted lever d, the glass or shade and the piece cut

page_text: out from the bottom thereof are removed from the mould when the latter is again
ready for another operation.
Or the opening a¹ may be produced in the following manner.
The mould c may be formed as represented at figure 4 with a recess c* in the bottom
thereof and the plunger or plug b with a projection 6 to act in combination with such
recess c* so as, in the act of pressing a glass or shade, to produce a well a' in the
bottom of the shade or glass and in one piece therewith, the well a² being, by the form
of the mould made thinner just below the part 3 of the shade or glass which rests on
the gallery of the burner; after the shade or glass is tempered in the annealing lear
the well or bottom a² is cracked out and the bottom of the shade or glass cut by the
flatting process.
The mould c is, when necessary, divided preferably into three parts to facilitate the
removal of the glass or shade therefrom.
Glasses or shades made according to my invention by the pressing process are
stouter and stronger than blown shades, are regular in size and shape and have raised
designs produced thereon in the pressing process which designs being in clear glass
do not obstruct the light but aid in the diffusion and reflection of light..
Having now particularly described and. ascertained the nature of my said invention
and in what manner that the same is to be performed I declare that what I claim is :—
The manufacture of shades or glasses for gas and other lights by the art of pressed
glass making substantially as herein shown and described.