Improvements in Pegs and their Cords for Telephone Exchanges.
Year: 1897

page_text: Date of Application, 10th Mar.. 1897
Complete Specification Left, 10th Deo,, 1897-Accepted, 15th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in Pegs and their Cords for Telephone Exchanges.
We, SIEMENS BROTHERS & CO. LIMITED, of 12, Queen Anne's Gate, Westminster, in
the County of London, Electrical Engineers, do hereby declare the nature of this
invention (as communicated to us from abroad by Siemens and Halske, 94, Markgra-
fenstrasse, Berlin, in the German Empire, Electrical Engineers) to be as follows :-
In pegs and their cords as heretofore constructed the disadvantage rises that the
cords easily become defective by abrasion and tearing at the point where they pass
out of the insulating tube of the peg, on account of the sharp bending to which they
are subjected in combination with the strong pull of the weight when they are
inserted into the jacks.
According to the present invention this defect is obviated by forming the end of
the peg from which the cord issues, with a bore of somewhat larger diameter than
the diameter of the braided cord and into the annular space thus formed is inserted
a stiffening envelope for the cord, extending some distance beyond the end of the
peg. Such stiffening envelope may consist of a wire coil, or a covering of cloth or
other flexible material, or the cord can be thickened to the required extent for that
purpose. The peg is according to this invention built up as follows.
The bore of the peg tube is enlarged at each end so that upper and lower shoulders
are formed at an intermediate part of smaller diameter; the cord is passed through
such smaller part of the bore into the upper enlargement, where the wires of the cord
are connected by soldering to the insulated contact plates of the peg, the end of the
cord being then wound round with silk yarn or other suitable material so that the
enlargement thus formed will when drawn back into the tube bear against the upper
shoulder of the intermediate part, and will thus withstand the downward pull of the
weighted cord. The peg is then fixed in the peg tube by a lateral setting screw
after which the before mentioned stiffening envelope is passed over the cord and
pushed up tight into the annular space in the lower end of the peg tube, in which
position it is secured by winding silk or other thread tightly round the part
projecting beyond the peg tube.
Improvements in Pegs and their Cords for Telephone Exchanges.
We, SIEMENS BROTHERS & Co. LIMITED, of 12, Queen Anne's Gate, Westminster.
in the County of London, Electrical Engineers, do hereby declare the nature of
this invention (as communicated to us from abroad by Siemens & Halske, of
94, Markgrafenstrasse, Berlin, in the German Empire, Electrical Engineers,) and in
"
CD 071

page_text: what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
.
In pegs and their cords as heretofore constructed the disadvantage arises that the
cords easily become defective by abrasion and tearing at the point where they pass
out of the insulating tube of the peg, on account of the sharp bending to which they 5
are subjected in combination with the strong pull of the weight when they are
inserted into the jacks.
According to the present invention this defect is obviated by forming the end of
the peg from which the cord issues, with a bore of somewhat larger diameter than
the diameter of the braided cord and into the annular space thus formed is inserted 1
a stiffening envelope for the cord, extending some distance beyond the end of the peg
as shewn on the accompanying drawing where the ebonite tuber of the peg, has
the bore of its lower end enlarged for the reception of the envelope t surrounding the
cord. Such stiffening envelope may consist of a wire coil, or a covering of cloth or
other flexible material, or the cord can be thickened to the required extent for that
purpose, the envelope t on the drawing is assumed to be of cloth.
The peg is according to this invention built up as follows.
The bore of the peg tube is enlarged at each end so that upper and lower shoulders
are formed at the intermediate part a of smaller diameter; the cord is passed through
such smaller part of the bore into the upper enlargement where the wires of the cord 2
are connected by soldering to the insulated contact plates of the peg, the end of the
cording then wound round at 2 with silk yarn or other suitable material so that
the enlargement thus formed will, when diawn back into the tube, hear against the
upper shoulder of the intermediate part a and will thus withstand the downward pull
of the weighted cord. The peg is then fixed in the peg tube by a lateral setting
screw & after which the before mentioned stiffening envelope t is passed over the cord
and pushed up tight into the annular space r in the lower end of the peg tube until
it bears against the lower shoulder of a in which position it is secured by winding
silk or other thread u tightly round the part projecting beyond the peg tube.
When a wire coil is employed this is secured to the cord in any suitable
manner.
By the use of the cloth tubular covering there is insured on the one hand, an easy
bend of the cord at the point of issue, and on the other hand a resistance to the
lateral bending pressure exercised on the cord, so that any kinking, breaking through
or tearing of the cord at the point of issue is prevented.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A peg and cord for telephone exchanges wherein the cord is provided with
a stiffening and thickening appliance projecting partly into the tubular part of the
peg and partly beyond the same, the inner end of the cord being also thickened, so
as to bear against a shoulder formed in the tube and thus to prevent any strain
coming upon the connections of the wires, of the cord, substantially as described.
2. In a peg and cord such as is referred to in the first claim, fixing the cord in the
peg by first drawing the cord into the tubular part thereof then fixing the wires of
the cord to the contacts of the peg, and thickening the inner end of the cord, an³,
after drawing the latter outward until the thickened end bears against the shoulder
of the tube, sliding a cloth tube or wire coil up the cord and into the tube until it
bears against the shoulder of the latter, after which the outer end of the cloth tube
or wire coil is secured to the outer part of the coil substantially as described.
Dated this 10th day of December 1897.