Improvements in and connected with Cord Grips for Electrical Apparatus.
Year: 1899

page_text: Date of Application, 3rd Nov., 1899
Complete Specification Left, 24th July, 1900-Accepted, 8th Sept., 1900
Engineers, of 67, Bulow Strasse, Berlin, W., in the Empire of Germany.]
Improvements in and connected with Cord Grips for Electrical
Apparatus.
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 to be as follows:-
The present invention refers to a cord grip for flexible cord in electrical
apparatus, and is constructed in such a manner that a secure grip of the flexible
cord is obtained without endangering the insulation of the latter.
If for example sake, such cord grip be applied to an ordinary electric lamp-
holder, the brass cover screwing on to the nipple of the lampholder would be
constructed in such a way that the top part would have an indentation going
around the whole circumference and this indentation would be partly elongated
in tube form, ending in a smooth edge being bent outwardly.
When the screw cover is put on, the indentation presses equally round the
conical-shaped grip, thus securely fastening the flexible cord. The neck of the
screwed cover is terminated, as explained above, by a short piece of tube, the edge
of which is bent outwardly, thus forming a convex surface facing the cords,
and preventing the insulation of same being worn off through coming into
contact with a sharp edge.
Dated this 27th dox of October 1899
COMPLETE SPECIFICATION.
Improvements in and connected with Cord Grips for Electrical
Apparatus.
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:
--
The present invention refers to a cord grip for flexible cord in electrical
apparatus, and is constructed in such a manner that a secure grip of the flexible
cord is obtained without endangering the insulation of the latter.
If for example sake, such cord grip be applied to an ordinary electric lamp-

page_text: holder, the brass cover screwing on to the nipple of the lampholder would be
constructed in such a way that the top part would have an indentation going
around the whole circumference and this indentation would be partly elongated
in tube form, ending in a smooth edge being bent outwardly.
When the screw cover is put on, the indentation presses equally round the
conical-shaped grip, thus securely fastening the flexible cord. The neck of the
screwed cover is terminated, as explained above, by a short piece of tube, the edge
of which is bent outwardly, thus forming a convex surface facing the cords,
and preventing the insulation of same being worn off through coming into
contact with a sharp edge.
On the accompanying drawing, I shew in Fig. 1 and 2 such cord grip attached
to a bayonet holder. The brass cover a which screws on to the nipple 6 of the
lampholder top c has got an elongation d bent inwardly. Such elongation or
neck ending in a smooth edge being bent outwardly. In consequence of this,
the gripping body e will be pushed downwards, when the cap or cover a is screwed
home, and will grip firmly the flexible cord f. The outwardly bent neck g with
its smooth edge protects the flexible cord against the abrasion, to which the latter
would be otherwise liable.
.
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 cord grip in which the cover or cap screwing on the nipple, has an
elongation for the purpose of gripping securely the conical shaped porcelain
grip, fully as described and for the purpose set forth.
2. A cord grip with an elongation and outwardly bent neck for the purpose
of preventing the insulation from being worn off through coming into contact
with a sharp edge, fully as described and for the purpose set forth.
Dated this 23rd day of July 1900.
HERMANN OPPENHEIMER.