Improvements in Holders for Incandescence Electrio Lamps, also applicable to the Holding of the Shades or Reflectors thereof.
Year: 1896

page_text: Date of Application, 22nd Aug., 1898
Complete Specification Left, 14th May, 1897-Accepted, 19th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Holders for Incandescence Electrio Lamps, also
applicable to the Holding of the Shades or Reflectors thereof.
We, HUGO HIRST of Nos. 69, 71, 88 Queen Victorin Street, in the City and County
of London, Electrical Engineer and GEORGE EDWIN FLRTOHRR of The Homestead,
Cale Green, Stockport in the County of Choster, Electrical Engineer do hereby
declare the nature of this invention to be as follows:-
Our invention relates to cortain improvemonts in holders for incandescence electrio
lamps, and is also applicable to the holding of the shades or reflectors thereof, and
has for its objects the retention of the lamp with the ordinary connections upon the
plug, without the use of springs or the like, thus obtaining a secure fastening in
addition to a perfect electrical connection.
In carrying our invention into practice, we use an externally screwed socket, with
two or more slots cut from the outer edge to the centro or approximately thereto.
Tho lower portion of said socket may be formed as a screwed nipple or a sorewed
socket for adaptation to any typo of electrolier, bracket, or other electrical fitting.
The inner part is provided with an insulating plug, or disc, carrying suitable
terminals for the proper coupling of the branch or other wires or loads, and
projecting points or pins for contact with the segmental or other contact pieces upon
the plug of the base of the lamp.
A nut and washer are provided, and constructed so as to conform to the upper part
of the socket heroinbefore described. The lamp, being of any ordinary type with a
plug and opposito pins, or pins or lugs which may project at any anglo, and with
suitable segmental or other contacts, as aforesaid, is threaded over the plug with a
milled or other nut fitting the socket. A washer with one or more projections to
engage with the slots in the socket is placed under said nut, and the lamp is then
put in position within said sockot, by allowing the pins or lugs upon the plug to
engage with the slots, the washer following in like order, and the nut pressing the
lamp into position so that it is tightly held, and perfect electric contact is ensured.
If it be required to hold a shado or roflector, this may be done by shaping the
same to conform to the socket according to our said invention, and arrange it so
that it may be gripped between the nut and the washer herein before described.
The ospecial advantages of this holdor according to our said invention consist in the.
retention of tho lamp so that it may not easily be removed by depredators, nor is it
liable to the fluctuation due to imperfect contact undor wind pressure or like causes,
which obtains in the case of other lampholders as heretofore made and used.
Dated this 10th day of August 1896.
FREDK. WALKER,
73 St. Stephen's Road, Upton Park, London, E.

page_text: Improvements in Holders for Incandescence Electrio Lamps, also
applicable to the Holding of the Shades or Reflectors thereof.
We, HUGO HIRST, of Nos. 69, 71, 88 Queen Victoria Street in the City and County
of London, Electrical Engineer, and GKORGR EDWIN FLETCHER of The Homestead,
Cale Green, Stockport, in the County of Chester, Electrical Engineer do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
Our invention relates to certain improvements in holders for incandoscence electric
lamps, and is also applicable to the holding of the shades or reflectors thereof, aud
has for its objects the retention of the lamp with the ordinary connections upon the
plug without the use of springs or the like, thus obtaining a secure fastening in
addition to a perfect electrical connection.
In order that our invention may be the bettor understood, we have appendod tho
accompanying sheet of drawings in which
Figure 1 is an elevation of the improved holder, and Figure 2 a plan thereof,
topside. Figure 3 is a similar plan of the lower side.
Figure 4 is a sectional view showing the attachment of the conductors, and a
dotted outline representing the position of a lamp and plug.
Figaro 5 is a plan view, lower end, of the plug and connections of an ordinary
lamp adapted to any kind of socket holder.
Figure 6 is a plan of the washer E showing the lugs.
Similar letters of reforence indicate corresponding parts throughout the several
views.
In carrying our invention into effect we employ a screwed socket F with two or
more slots cut from the outer edge to the centre, or approximately thereto. Tho
lower portion A is preferably formed as a screwed nipple for adaptation to any type
of electrolier, bracket or other electric light fitting, or may be provided with a
screwed socket B when the lamp and holder are to be suspended by the conductor H
Figure 4. An insulating plug G, Figures 2 and 4, carries suitable a a', for the propor
coupling of the branch leads or wires, as shown. Projecting points or pins 66 are
passed through or affixed to, the plug G so as to contact with the segmental or other
contact pieces e e' Figuro 5, upon the plug fg forming the base of an ordinary
incandescence lamp. A nut C is screwed upon the upper part of the socket F and a
washer E below it has two lugs c c fitting the slots. The nut C is preferably with
the washer E threaded upon the plug or lamp base above the stop pins dd' Figure 5.
Said plug is then placed in the socket F, the pins d d' entering the slots and the
lugs oo' of the washer E also entering said slots, so that when the plug is forced down
by the action of screwing the nut Cupon F', and pressing on E, contact is established
between the pins or points 6 & and the segmental contact pieces e e' upon the plug,
and at the same time perfect rigidity is effected in holding the lamp. In holding a
shade or reflector, it is gripped between the under surface of the washer E and the
lock nut D, or between the under surface of D and the projecting flange of F. In
order to facilitate the attachment of the conductors H to tho terminals a a', we forin
the insulating plug G so as to fit freely within the socket F, and fix it in position
by means of a screw or screws n, so that it may roadily be withdrawn or
replaced.
The especial advantages of this holder consist in the retention of the lamp so that
it may not easily be removed by depredatora, nor is it liable to the fluctuation due to
imperfect contact under wind pressure or like causes which obtain in the case of other
lampholders as heretofore made and used.

page_text: Having now particularly described and ascertained the nature of our said invon-
tion, and in what manner the samo is to be performed, we declare that what we
claim is ;-
First. The improved lamp holder, and shade or reflector holder substantially as
herein described and shown by the drawings.
Second. In an improved holder for incandescence lamps, the method of, and means
for establishing contact with the contact pieces of the plug base of a lamp by means
of points or pins, substantially as and for the purposes described and shown by the
appended drawings.
Third. In a holder for incandescence lamps the combination of a screwed and
slotted socket with the plug or base of an incandescence lamp substantially as horein
described and shown by the appended drawings.
Dated 2018 A1th day or OY 1897
FREDK, WALKER,
78 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.
FREDK. WALKER,
78 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.