Improvements in Electric Contact Strips for Stereotype Matrix Machines, Telegraphy, and other purposes.
Year: 1895

page_text: Date of Application, 26th Feb., 1895-Accepted, 19th Oct., 1895
COMPLETE SPECIFICATION.
Improvements in Electric Contact Strips for Stereotype Matrix
Machines, Telegraphy, and other purposes.
I, CHARLES MÉRAY HORVATH of 10 Hochsteingasse, Graz, in the Austrian
Empire, Engineer, 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 relates to electrical contact strips which consist of paper having
metallic surface, which is made non-conducting at certain points or parts. At
present the non-conducting parts are produced either by perforating the strips or
by acting upon the metallic surface at the desired parts by acids or fluids which
produce a non-couducting film, or mask, or remove the local conductivity of the
metal.
The produced strips may be used in telegraphy, and are especially applicable
for use with the stereotype matrix machine described in the Specification to my
former Letters Patent No. 17853 dated 22nd September 1893.
According to my invention I produce the non-conducting parts of the metallic
surface by the special method and means hereinafter described.
The strip of paper is caused to pass with its metallic surface near to heated
pins, which, when pressed, touch the surface and oxidise it, thus producing local
insulation.
Apparatus which I may employ for the purpose of my invention is illustrated
by the accompanying drawings.
Figure 1 represents a strip in plan with non-conducting parts formed on its
surface.
Figure 2 a pin which may be applied by hand, and
Figure 3, an elevation of an apparatus for depressing the pins by means of a
key or keys.
The paper strip u is provided with a metallic surface b. Referring to Figure 3,
the piu c is pinned at its upper end upon the lever e' which is actuated by the
key e.
The lower end of the pin is heated by a suitable gas or other flame d or by
any convenient beating device, and as many pins as may be required may be
arranged alongside each other, each piu being actuated by the same or by different
keys, according to the character of the result required.
The handled pin shewn by Figure 2 is intended for use when the contact strip
is locally insulated by hand, or to make good any defects which may accidentally
be produced when using the apparatus illustrated by Figure 3.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein before described method for locally insulating the metallic surface
of electric contact strips, substantially as herein before described.
2. An apparatus for locally insulating the surface of electric contact strips,
constructed arranged and operated as herein before described with reference to the

page_text: ccompanying drawings, and having as its essential feature a heated pin or heated
ins capable of being depressed upon the surface of the strip.
Dated this 25th day of February A.D. 1895.
WILLIAM E. HEYS & SON,
Agents for the Applicant.