IMPROVEMENTS IN MACHINERY OR APPARATUS FOR APPLYING ANTI-INDUCTION COVERINGS TO INSULATED ELECTRICAL CONDUCTING WIRES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by George Shepard Page at the Office
of the Commissioners of Patents on the 7th July 1882. Communicated to
him from abroad by John Milton Stearns Junior of Brooklyn, New York, in
the United States of America.
GEORGE SHEPARD PAGE of Stanley, County of Morris, State of Jersey, in the
United States of America, but at present of the American Exchange, Strand in
the County of Middlesex "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR
APPLYING ANTI-INDUCTION COVERINGS TO INSULATED ELECTRICAL CONDUCTING
WIRES [Communicated to him from abroad by John Milton Stearns Junior of
Brooklyn, New York, in the United States of America.]
"
In the Specification to Imray's Patent No. 5468 of 14th December 1881 (being a
communication from the said J. M. Stearns) was described a method of preventing
induction in a group of telegraph or telephone conductors by providing a covering
consisting of a thin sheet metal band bent backwards and forwards so as to form
longitudinal corrugations or loops within each of which one of the insulated
conductors was introduced. The present invention relates to machinery or
apparatus for bending the said sheet metal band into the corrugated or looped
form, for introducing the insulated conducting wires into the several corrugations
or loops and for compressing the combined covering and conducting wires into a
cable.
"
The
For this purpose according to one arrangement there are placed behind each
other on a table or frame two or more sets of fluting or corrugating wheels or
rollers, each set consisting of an upper and a lower shaft each carrying wheels or
rollers, of which the upper ones fit in between the spaces of the lower ones.
first set of such bending rollers are situated some distance apart, so that the flat
sheet metal on being led between them by fixed guides is first bent into com-
paratively wide corrugations while in the following set or sets the wheels are
placed closer together so as to form the sheet metal into narrow and deep
corrugations as it passes through. The last set of wheels or rollers have their
peripheries grooved and into such grooves are led the several insulated conducting
CD 9.11

page_text: wires for forming the cable, so that as the corrugated or fluted sheet metal passes
through these rollers, a conducting wire is deposited by each roller into the bottom
of each lower corrugation and into the top of each upper corrugation. As the
combined sheet metal covering and conductors issue from these rollers they.are
conducted between guides to a pair of horizontal nipping rollers which nip the
sheet metal covering at a point between the upper and lower corrugations and thus
compress the whole into a compact form with the corrugations and their enclosed
conductors laid closely side by side. The number of sets of corrugating wheels
or rollers employed will depend upon the thickness of the sheet metal to be
operated upon.
According to another modification, instead of the first set or sets of corrugating
of fluting wheels or rollers, is employed a die consisting of two plates having
between them a narrow space which at the front end is flat and corresponds with
the size and thickness of the sheet metal band, while from the front to the rear
end the space is formed into fan shaped corrugations, gradually increasing in depth,
so that as the sheet metal is drawn through it is gradually bent up from a plane
surface to the corrugated form. The plates may be hinged together at the rear
end so as to open in order to allow the metal band to be introduced in the first
instance.