Improvements in Wall Connections for Electric Lighting.
Year: 1898

page_text: Date of Application, 7th Sept., 1898
Complete Specification Left, 7th June, 1899-Accepted, 29th July, 1899
Improvements in Wall Connections for Electric Lighting.
We, ANDREAS PETER LUNDBERG, and, GUSTAF CHARLES LUNDBERG, both of
the Bradbury Electrical Works, Bradbury Street, Kingsland, in the County of
London, Electrical Engineers, do hereby declare the nature of this invention to
be as follows:-
--
Our invention relates to improvements in wall connections for electric lighting.
In carrying out such invention, we construct a suitably shaped or turned block
of porcelain or other insulating material to form the socket part, and in this said
block, provide a number of vertical and horizontal holes.
In two of the vertical holes we insert two cylindrical metal contact tubes, in
which the contact pins of the portable plug, forming part of the apparatus, are
inserted when connection is desired.
At the edge of the block we provide two slots entering horizontally and passing
through into the vertical holes containing the metal contact tubes, continuing
through to the other side as circular holes.
Each metal contact cylinder is provided with a horizontal slot and a hole near
its base, these slots and holes coinciding with those in the block they are fitted
in.
An eyelet screw passes into the slot in the block and tube, and a nut fitted on
the threaded part of the eyelet, keeps the contact tube in its proper position in
the block.
-
The and leading-in wires are brought up through vertical holes into the
block and enter into the holes of the eyelet screws and are clamped directly
against the sides of the contact tubes, by means of the nuts; in this manner
forming a very simple and reliable connection.
Another method of accomplishing the same object is to provide other vertical
holes in the block, adjacent to those in which the contact tubes are fitted, in such
positions that the adjacent holes open one into the other.
These other holes are then fitted with metal cylinder pieces, provided with set
screws and form pillar terminals for the leading-in wires.
These terminal pieces are clamped to the contact pieces by means of suitable
screws passing into the block horizontally from the edge and through the.contact
tubes, the connection being made with the usual portable plug.
Dated this 7th day of September 1898.
J. P. BAYLY,
18, Fulham Place, London, W.,
Agent for the Applicants.

page_text: Improvements in Wall Connections for Electric Lighting.
We, ANDREAS PETER LUNDBERG, and GUSTAF CHARLES LUNDBERG, both of
Bradbury Electrical Works, Bradbury Street, Kingsland, in the County of
London, Electrical Engineers, 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 improvements in wall connections for electric lighting.
And in order that our invention may be thoroughly understood, we now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is an elevation of the wall connection.
Fig. 2, is a section of the cover with the block in elevation.
Fig. 3, is a plan of Fig. 1.
Fig. 4, is an elevation of the terminal inserted in the block Fig. 8.
Fig. 5, is an alternate design of a terminal band contact tube d, connected
together by a long screw f with. or without a nut e.
Figs. 6, and 7, are terminals and contact tubes of different patterns.
Fig. 8, is the plan of the top of the block g.
Fig. 9, is the plan of the bottom of the block g.
Fig. 10, is a front elevation of an alternate pattern of a block h.
Fig. 11, is a back view of Fig. 10.
Fig. 12, is a plan of the top of Fig. 10.
Fig. 13, is a plan of the bottom of Fig. 10.
In carrying out such invention, we construct a suitably shaped or turned
block of porcelain or other insulating material to form the socket part, and
in this said block, provide a number of vertical and horizontal holes.
In two of the vertical holes we insert two cylindrical metal contact tubes d
in which the contact pins of the portable plug i, forming part of the apparatus,
are inserted when connection is desired.
At the edge of the block we provide two slots entering horizontally and
passing through into the vertical holes containing the metal contact tubes d,
continuing through to the other side as circular holes j.
Each metal contact cylinder d is provided with a horizontal slot and a hole
near its base, these slots and holes coinciding with those in the block they are
fitted in.
An eyelet screw passes into the slot in the block and tube and a nut m
fitted on the threaded part of the eyelet, keeps the contact tube d in its proper
position in the block has shown by dotted lines in Fig. 13.
The and leading-in wires are brought up through vertical holes into the
block and enter into the holes n of the eyelet screws and are clamped directly
against the sides of the contact tubes by means of the nuts, in this manner form-
ing a very simple and reliable connection.
In Figs. 2, 4, 8, and 9, another method of accomplishing the same object is
to provide other vertical holes in the block g, adjacent to those in which the
contact tubes are fitted in such positions that the adjacent holes open one into
the other.
These other holes are then fitted with metal cylinder pieces b provided with set
screws o and form pillar terminals for the leading-in wires.
These terminal pieces are clamped to the contact pieces by means of suitable
screws passing into the block horizontally from the edge and through the con-
tact tubes d, the connection being made with the usual portable plug.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In wall connections for electric lighting, the combination and arrangement
of the horizontal and vertical holes the block h terminals b contact tubes d eyelet
screws nuts m slots k and cover a, substantially as hereinabove described and
according to Figs. 10, 11, 12, and 13, of the accompanying drawing.
2. In wall connections for electric lighting, the combination and arrangements
of the cover a block y terminals b contact tubes & horizontal and vertical holes q
and set screws o, substantially as hereinabove described and according to Figs. 2,
4, 8, and 9, of the accompanying drawing.
3. The combination of a terminal with contact tube d screw f and set screw o,
substantially as herein above described and according to Fig. 5, of the accompany-
ing drawing.
4. The combination of terminal b with contact tube d screw f and set screw o,
substantially as herein above described and according to Fig. 6, of the accompany-
ing drawing.
5. The combination of terminal with contact tube screw f and set screw o,
substantially as herein above described and according to Fig. 7, of the accompany-
ing drawing.