Improvements in the Holders or Carriers of Electrical Incandescent or Glow Lamps.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Holders or Carriers of Electrical Incandescent
or Glow Lamps.
I, RICHARD GEORGE EVERED, Director of Evered and Company Limited,
Barnet Works, Birmingham in the County of Warwick, Manufacturers, do hereby,
declare the nature of this invention to be as follows:-
My invention relates to electrical incandescent or glow lamp holders or carriere
in which the bolder or carrier and its lamp are suspended by the electrical
conducting wires of the lamp, and my said invention consists of the improvements
hereinafter described in the said holders or carriers whereby a very secure
attachment of the holder to the electrical conducting wires is obtained and the
connections of the said wires with the binding screws of the insulating body of
the holder are at the same time relieved of the weight of the said holder and its
lamp.
In constructing an electrical incandescent or glow lamp holder or carrier
according to one of my improvements I provide the top of the said holder with a
cap preferably of china or other insulating material the said cap being made in two
or more parts. The said cap is conical and has a hole at its summit.
The upper part of the said conical cap when in position in the holder projects
through the screw nut at the top of the metallic tube or liner of the holder and
the electrical conducting wires from the binding scrows of the insulating body of
the bolder pass through the axial hole in the said cap. The upper edge of the
screw nut referred to is provided with an inwardly projecting flange. On the
screwing down of the screw nut the flange of the nut coming in contact with
the side of the conical cap the two halves of the said cap are pressed in olose
contact and are thereby made to grip firmly the wires in the axial hole of the said
cap. In order to prevent the turning of the divided cap on the screwing home of
the screw nut on the top of the metallic tube or liner teats or projections are made
at opposite points on the underside of the said cap and a diametrical groove or
notch is formed in the top of the insulating body of the holder for the said teats of
the cap to seat themselves in.
In constructing an electrical incandescent or glow lamp holder or carrier
according to another of my improvements I dispense with a cap in the top of the
holder or carrier. I make the insulating body of the holder in two longitudinal
parts or halves, the said half body parts having in their meeting faces semi-
circular recesses for taking upon the spring pins or terminals of the holder and
also upon the wires in electrical contact with the said spring pins or terminals,
The upper part of the insulating body of the holder, when the two halves are in
position in the metallic tube or liner, is of a conical figure and projects through
the flanged screw nut on the top of the said metallic tube or liner. On the
screwing down of the screw nut its flange pressing on the conical part of the
insulating body forces the two halves together and causes them to grip firmly
the conducting wires of the lamp. The insulating body of the holder is prevented
from turning on the screwing down of the screw nut by an internal projection in

page_text: the metallic tube or liner engaging with a notch or groove in the side of one of the
halves of the said insulating body.
Dated this Twelfth day of November 1895.
W. T. WHITEMAN,
Agent for the Applicant.
Improvements in the Holders or Carriers of Electrical Incandescent
or Glow Lamps.
I RICHARD GEORGE EVERED, Director of Evered and Company Limited,
Barnet Works Birmingham, in the County of Warwick, Manufacturers, 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 :-
My invention relates to electrical incandescent or glow lamp holders or carriers
in which the holder or carrier and its lamp are suspended by the electrical
conducting wires of the lamp and my said invention consists of the improvements
hereinafter described in the said holders or carriers, whereby a very secure
attachment of the holder to the electrical conducting wires is obtained and the
connections of the said wires with the binding screws of the insulating body of
the holder are at the same time relieved of the weight of the said holder and its
lamp.
In constructing an electrical incandescent or glow lamp holder or carrier
according to one of my improvements I provide the top of the said 'holder with a
cap preferably of china or other insulating material the said cap being made in two
or more parts. The said cap is conical and has a hole or holes at its summit.
The upper part of the said conical cap when in position in the holder projects
through the screw nut at the top of the metallic tube or liner of the holder and
the electrical conducting wires from the binding screws of the insulating body of
the holder pass through the hole or holes in the said cap. The upper edge of the
sorew nut referred to is provided with an inwardly projecting flange. On the
screwing down of the screw nut the flange of the nut coming in contact with
the side of the conical cap the two halves of the said cap are pressed in close
contact and are thereby made to grip firmly the wires in the hole or holes of the
said cap.
In order to prevent the turning of the divided cap on the screwing
home of the screw nut on the top of the metallic tube or liner, teats or projections
are made at opposite points on the underside of the said cap and a diametrical
groove or notch is formed in the top of the insulating body of the holder for the
said teats of the cap to seat themselves in.
In constructing an electrical incandescent or glow lamp holder or carrier according
to another of my improvements 1 dispense with a cap in the top of the holder or
carrier. I make the insulating body of the holder in two or more longitudinal
parts, the said parts, when two are used, having in their meeting faces semi-
circular recesses for taking upon the spring pins or terminals of the holder and
also upon the wires in electrical contact with the said spring pins or terminals.
The upper part of the insulating body of the holder, when the parts are in position
in the metallic tube or liner, is of a conical figure and projects through the flanged
screw nut on the top of the said metallic tube or liner. On the screwing down of
the screw nut its flange pressing on the conical" part of the insulating body forces
the parts together and causes them to grip firmly the conducting wires of the lamp,
The insulating body of the holder is prevented from turning on the screwing down

page_text: of the screw out by an internal projection in the metallic tube or linor engaging
with a notch or groove in the side of the said insulating body..
Figure 1 of the accompanying drawing represents in elevation an electrical
incandescent or glow lamp and lamp holder or carrier the latter being.constructed
according to one of the arrangements constituting my invention; Figure 2.
represents the said holder or carrier in vertical section with a portion of the lamp
in elevation; Figure 8 represents the said holder and lamp in plan.
Figure 4 represents elevations at right angles to one another of one of the
halves of the conical cap of the holder;
Figure 5 is a plan of the china-insulator of the holder.
Figure 6 represents in section a holder or carrier constructed according to
another or modified arrangement of my invention and Figures 7 and 8 represent.
parts of the same detached.
The same letters of reference indicate the same parts in the several figures of:
the drawing.
I will first describe the holder or carrier Figures 1, 2, 3, 4 and 5.
a, a is the electrical incandescent lamp holder, a being the metallic tube or
liner of the said holder and a the china insulator of the same. The said lamp:
holder a, a is provided with a cap made in two or more (but preferably two)
symmetrical parts marked respectively b', b, the said half parts of the cap when in.
position on the holder a, a having a conical figure externally. Each half part
of the cap has two semi-circular grooves or notches d, d in its inner or flat face-
which when the two half parts are put together constitute the passages and grips.
for the conducting wires e, e¹ of the lamp. The two half parts of the conical cap.
are pressed nearly into contact and are thereby made to firmly grip the wires e, e
by a flange on the screw nut on the top part of the metallic liner a of the
lamp holder. In order to prevent the turning of the cap on the screwing down.
of the nut feach half part b, 6 of the cap is provided with teats or projections.
marked respectively g', g' which engage in a cross slot a¹ in the top of the china.
insulator a of the holder.
When the parts are in position the electrical conducting wires are gripped
between the half parts b', 62 of the conical cap and a very secure attachment of
the lamp holder to the said electrical wires is obtained while at the same time.
the weight of the glow lamp and its holder is removed from the connections of the
said wires with the binding screws of the insulating body of the holder.
In the modified arrangement represented in Figures 6, 7 and 8 the conical
cap b', herein before described and represented in Figures 1, 2, 3, 4 and 5 is
dispensed with. The china insulator of the holder is made in two parts marked.
respectively, the said parts having such a length that their tops, which together
have the figure of a truncated cone, project through the flanged screw nut fƒ'
on the metallic tube or liner a of the holder. Each half part of the china insulator
has two semi-circular recesses the larger parts of which, when the two half parts
are put together, constitute the chambers or holders for the spring pins or
terminals of the lamp. The china insulator is prevented from turning in the
liner a of the holder by the ordinary internal projections in the said liner engaging
in the notches h, h of the china insulator (see Figure 8).
The action of this modified holder or carrier is essentially the same as that
described with respect to the holder or carrier Figures 1, 2, 3, 4 and 5. On the
screwing down of the screw nut f, f¹ the flange f¹ coming into contact with
opposite sides of the conical top of the two half parts c¹, of the china
insulator the said two half parts are pressed together and are made to grip the
electrical conducting wires e, e passing to the spring pins or terminals of the
holder.
Although I have represented the china insulator of the holder Figures 6, 7 and 8
as made of two parts yet I wish it to be understood that it may be made of three
or more parts.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that I claim
as my invention;-
The improvements in the holders or carriers of electrical incandescent or glow
lamps hereinbefore described and illustrated in Figures 1, 2, 3, 4 and 5 of the
accompanying drawing, the said improvements consisting in providing each holder
or carrier with a conical cap made preferably of an insulating material in two or
more parts, between which parts the electrical conducting wires pass to the
terminals of the holder; and forming on the screw nut which takes on the top of
the metallic liner of the holder an inwardly projecting flange which when the
said screw nut is screwed down bears on the conical exterior of the cap and closes
its parts tightly upon and causes them to grip the electrical conducting wires
substantially as and for the purpose herein before described and illustrated; also
the modification hereinbefore described and illustrated in Figures 6, 7 and 8 in
which a cap is dispensed with, the china insulator being made iu two or more
parts which when in position have a conical top on which the flanged screw nut
bears substantially as described and illustrated.
Dated the Twenty-fifth day of July 1896.