Improvements in and connected with Plugs for Wall Sockets.
Year: 1899

page_text: Date of Application, 7th Dec., 1099
Complete Specification Left, 24th July, 1900-Accepted, 25th Aug., 1900
Communicated from abroad by ACTIENGESELLSCHAFT MIX & GENEST,
Engineers, of 67, Bulow Strasse, Berlin, W.]
Improvements in and connected with Plugs for Wall Sockets.
1, HERMANN OPPENHEIMER, Electrical Engineer, of 55, Redcross Street, Barbican,
London, E.C., in the County of Middlesex, do hereby declare the nature of this
nvention to be as follows:-
Wall plugs used on high voltage installations have hitherto laboured under
the disadvantage that generally the contacts between the flexible wire and the
contact pins respectively were imperfect or liable to cause short circuiting.
To remedy these disadvantages is the aim of the present invention, for which
purpose the plug and its contact pins are mounted in china, steatite, ebonite or
other insulating material, and the flexible wire for same fastened to the contact
pins by means of socket terminals, thus obtaining perfect and secure attachment.
The china part of the plug is made oblong, having two openings through its
The hole for the reception of the
body, through which the contact pins pass.
contact pins is at its top end wider than at its bottom end, and the screwed end
of the contact pins is fixed by means of nuts in the shouldered hole of the top
part.
•
The two holes are separated from each other by a channel, through which the
flexible cord passes, and with its free end goes to the two contact pins, and is
brought into a secure electrical connection by means of socket terminals, and set
screws.
1900
TURD
COMPLETE SPECIFIC
Improvements in and connected with Plugs for Wall Sockets.
I, HERMANN OPPENHEIMER, Electrical Engineer, of 55, Redcross Street, Barbican,
London, E.C., in the County of Middlesex, 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:-
Wall plugs used on high voltage installations have hitherto laboured under
the disadvantage that generally the contacts between the flexible wire and the
contact pins respectively were imperfect or liable to cause short circuiting.
To remedy these disadvantages is the aim of the present invention, for which
nurpose the plug and its contact pins are mounted in china, steatite, ebonite or

page_text: other insulating material, and the flexible wire for same fastened to the contact
pins by means of socket terminals, thus obtaining perfect and secure attachment.
The china part of the plug is made oblong, having two openings through its
body, through which the contact pins pass. The hole for the reception of the
contact pins is at its top end wider than at its bottom end, and the screwed end
of the contact pins is fixed by means of nuts in the shouldered hole of the top
part.
The two holes are separated from each other by a channel, through which the
flexible cord passes, and with its free end goes to the two contact pins, and is
brought into a secure electrical connection by means of socket terminals and set
screws.
"
On the accompanying drawing, I shew in Fig. 1 a section, and in Fig. 2 a
plan of such plug. The china or insulating part has 2 openings c through which
the contact pieces b pass.
The holes for the reception of the contact pins are at
their top ends wider than at their bottom ends. The screwed end of the contact
pin is fastened by means of nuts & which then rest on the shouldered part of the
openings. These two holes are separated from ach other by a central opening f
through which the flexible cords g pass, being with their free ends fixed to the
squared part of the pins and securely fastened thereto by means of set screws e.
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 claim is:
1. A plug having its contact pins fixed to an insulating socket or handle a, the
former having set screws e in order to make secure connection between pins and
flexible cord, fully as described and for the purpose set forth.
Dotad this 23rd day of July 1900