A Water-proof Lamp Holder for Swan Incandescent Electric Lamps.
Year: 1899

page_text: Date of Application, 26th May, 1899-Accepted, 2nd Sept., 1899
[Communicated from abroad by G. BRANDT, of Kochstrasse, 4, Berlin, Germany,
Patent Agent.]
A Water-proof Lamp Holder for Swan Incandescent Electric Lamps.
I, HUGH DONALD FITZPATRICK, of 100, Wellington Street, Glasgow,
Registered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The object of this invention is to provide means whereby swan incandescent
electric lamps can be installed in moist places or in the open air, and, to this
end, the lamp holder is so constructed that it will withstand the action of
moisture.
The new lamp holder is shown on the annexed drawings, whereon,
Fig. 1 is a general view of the lamp holder.
Fig. 2 is a vertical section of the same, showing the interior parts thereof.
Fig. 3 is an inverted plan view.
The lamp holder is made in the form of a double cup insulator so as to increase
its superficial resistance as much as possible. It is made of porcelain or other
suitable insulating and fire resisting material. On the body P are protruding
ribs and which run down longitudinally between the connection clamps (or
binding screws) and k¹ and prevent short circuiting, between the clamps by
means of water which may condense and collect on the surface of the insulator
body.
The connecting clamps and are arranged under the hood of the insulator
and they are attached to the connecting rods and respectively, the latter are
screwed on the vertical connecting rods 12 and 13 respectively and these again are
in connection with the lamp-contacts or pistons and The lamp holding
socket inserted in the insulator body is of the usual or any well known con-
struction and may be secured in place by screws, cement, or other convenient
manner.
It is essential to have the connecting rods and as well as 12 and 13 separated
by a body of porcelain forming part of the insulator as the use of other artificial
means, such as rubber or cement, for preventing moisture from getting in between
the metal parts carrying currents of opposite polarity and causing short circuiting
is thereby avoided.
A ring is provided for suspending the lamp-holder.
A screwed nipple can be imbedded in the porcelain, instead of using a ring f,
whereby the lampholder can be securely screwed to a pendant or bracket.
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 consider novel and desire to claim is: :-
1. A holder for swan incandescent electric lamus shaned lika a

page_text: insulator and made of porcelain or other insulating and fire resisting material said
holder being so made that all the conducting parts are insulated from one another
by a portion of the material of the holder itself, substantially as and for the
advantages hereinbefore set forth.
2. A holder for swan incandescent electric lamps, such as claimed in Claim 1,
in which the clamps for the conducting wires are separated from each other by
solid ribs in such a manner that the said ribs, which form part of the body of the
holder, prevent moisture collecting between the connecting clamps and causing
short circuiting, substantially as hereinbefore set forth.
3. A holder for swan incandescent electric lamps, such as claimed in Claim 1
in which the spring contacts or pistons pass up through the porcelain or other
insulating body and are connected to the clamps of the conducting wires by
means of screw connections thereby forming a good and reliable connection and
locking or securely fastening these clamps in the body of the holder without the
aid of cement or such like, substantially as set forth.
4. A lamp holder constructed, substantially as herein before described and
shown on the drawings annexed.
Dated this 25th day of May 1800
H. D. FITZPATRICK,
100, Wellington Street, Glasgow.