Year: 1896

page_text: projections of the proper dimensions, as referred to in the beginning of the
description.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
from abroad, I declare that what I claim is:
1. In a compound mould for making insulating1 bases for incandescent
lamps the combination with a lower die having pins, of an upper die formed with
cavities and projections on one end and vertical side grooves to form projections
and cavities of the insulating base, and perforations in the said end of the die to
receive pins projecting from the lower die.
2. In a compound mould for making insulating bases for incandescent lamps, the
combination with an upper die having perforations of a lower die formed with
projections, and a flanged edge to give the desired shape for the insulating block,
perforations extending vertically through the die for the passage of pins, vertical
side grooves, and spring arms fastened at their lower end in said grooves, extending
at an angle to the die above the latter, with inward projections adjacent to their
outer end and adapted to be moved into said grooves.
3. In a compound mould for making insulating bases for incandescent lamps, an
upper die having perforations, in combination with a receptacle having vertical
guides on its inner walls and pins projecting upwards from its bottom to the top
of the receptacle, and with a lower die vertically movable in said receptacle and
formed with vertical side grooves engaging said guides, perforations through which
said pins project, vertical grooves in the side of the die and spring arms secured at
their lower end in said grooves and having an inward projection adjacent to their
upper end, the latter projecting above the die and the spring arms located at an
angle to the die and movable into said groove, and projections and a circular
flange at one end of the die for giving the desired shape to the insulating base.
4. In a compound mould for making insulating bases for incandescent lamps, an
upper die having perforations, in combination with a receptacle containing vertical
pins for forming holes in the insulating base, and a lower die movable vertically in
said receptacle on said pins and provided with vertical side grooves and spring arms
secured in and movable into said grooves, extending outwardly at an angle to said
die and above the latter, and having inward projections adjacent to the top of
said arms.
5. In a compound mould for making insulating bases for incandescent lamps, an
upper die with perforations, in combination with a lower die provided with vertical
side grooves and spring arms secured at their lower end in said grooves, extending
above the top of the die with an inward projection at their upper end, said
spring arms normally projecting outward at an angle to the die and movable
into said grooves, and automatically movable out of said grooves to normal
position.
6. A compound mould for making insulating bases for incandescent lamps,
consisting of a receptacle provided with vertical pins projecting up from the bottom
of the receptacle,
a lower die movable vertically in said receptacle on said pins and
having vertical side grooves and spring arms projecting above the top of the lower
die with inward projections at their upper end, said spring arms being movable
into and out of said grooves by the movement of the die, in combination
with an upper die with perforations adapted to move down on the pins in the
receptacle.