Process and Apparatus for the Production of Insulators for Electric Wires.
Year: 1899

page_text: Date of Application, 6th Oct., 1899-Accepted, 2nd Dec., 1899
COMPLETE SPECIFICATION,
Process and Apparatus for the Production of Insulators for Electric
Wires.
I, FRANZ KAPFENBERGER, Modeller, of Dölau, near Halle-on-the-Saal, in the
Empire of Germany, 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:―
This invention for a process and apparatus for the production of insulators for
electric wires relates to a process and apparatus, by means of which finished
insulators for electric wires, together with the threads or fillets can be cast at a
single working operation.
The apparatus contrived for this purpose will be understood from the follow-
ing description, with the assistance of the accompanying drawing.
Fig. 1 of the drawing is a vertical section through the mould and the
insulator.
Fig. 2 is the external view of the same with the inner core screwed out of
the insulator.
Figs. 3 to 5 are separate illustrations of the core-holder and the core.
Fig. 6 is a view of the finished insulator.
Figs. 7 and 8 are illustrations of a form or mould for simultaneously casting
electric buttons and flaps," as well as an insulator furnished with buttons
and lugs or ears.
The apparatus consists substantially of the bipartite mould A furnished with
a recess corresponding to the external form of the insulator J to he made, the
mould A being held together by means of a ring R or in some other suitable
manner. (See Figs. 1 and 2.)
In the
recess formed in A, the core circumscribing the sides 20
of the insulator as also the thickness of the walls of the socket h,
is inserted and through the hore a of the core B the core C, which determines the
width of the socket, and carries the screw thread or fillet, is introduced (sec
Figs. 1 and 7).
The core is detachably connected with a fixing arrangement consisting of
caps and a spindle s, the cap being held by means of a cylinder D at a
suitable distance from the mould A (see Figs. 1 and 2).
The thread of the spindle s, which is firmly connected with . has the same
pitch as the thread g of the core C, so that, after the pouring in has been effected
at E, and partial drying of the mass, the core C can be screwed out, whereupon,
after the cast insulator has been removed from the mould nothing remains for
finishing it beyond removing the burr formed at the contact points of the
halves A A of the mould and the pieces found on the mould.
By means of this apparatus, insulators of different kinds and forms can be
made, the cores and preliminary forms requiring to he made in conformity with
the insulator to be cast, and the pitch of the thread of the spindles to correspond
with the pitch of that of the core C.

page_text: 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. Process for casting insulators for electric wires, the distinguishing feature
being that the insulator is produced with socket and thread, or fillet by a single
working operation, with the assistance of a mould A and cores BC.
2. The apparatus contrived for carrying out the process indicated under
Claim 1, the distinguishing feature being that cores B and C are introduced
into the mould A, the core C being furnished with a thread, or fillet, and con-
nected with a spindle s, which is held by a cap k.
Dated the 6th day of October 1899.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.