Improvements in Multiple Switch Board Systems for Telephonic Exchange, and Wire Bands to be used therein.
Year: 1889

page_text: Date of Application, 24th May, 1889
Complete Specification Left, 24th Feb., 1890-Accepted, 12th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Multiple Switch Board Systems for Telephonic
Exchange, and Wire Bands to be used therein.
I, JOHN EDWARD KINGSBURY, of 79 Coleman Street, in the City of London,
Manager, (a communication to me from abroad by the Western Electric Company of
Chicago, Illinois, United States of America,) do hereby declare the nature of this
invention to be as follows:-
In multiple switch board systems the switch board proper consists of a number of
duplicate sections, each section containing a switch for each of the different telephone
lines these different sections are each divided vertically into a number of divisions-
for example each section may contain six divisions.
The spring jack switches in each division are carried by horizontal-strips say 20 on
each strip and the strips are laid one above the other.
Each switch in each section has to have a wire led from it to a corresponding
switch in the next section and from that to the next and so on.
A test wire is also required for each telephone wire-hence if there are 20 switches
on each strip the number of wires looped to each strip would be 40--and if there
are,6 strips in each horizontal plane in each section six times forty wires would be
required for making the connections between the switches on these six strips of one
section with the switches on, the six strips of the. next section..
These wires have heretofore been built up in cables usually of forty wires in each-
the cables have been circular or oval in cross section and have been supported in
various ways at the rear of the switch board. The wires in such cables have also been
ranged in the same order relatively one to the other as they pass from a strip of any
one section to the corresponding strip of the next section.
Such a cable occupies necessarily considerable vertical space (being circular or oval
in cross section) and also as the wires run throughout the cable in the same relative
positions one to the other (that is substantially parallel throughout the length of the
board) induction between the wires takes place to an appreciable extent.
The object of this invention is to dispose the wires at the rear of the switch board
in such a manner that they may be spread out to the rear without occupying an undue
amount of vertical space and at the same time to change the positions of the different
wires relatively one to another as they pass from section to section so that no two
telephone wires may remain in close proximity to one another for any considerable
distance.
This is effected by making up or weaving together the wires into flat bands pre-
ferably of a depth of a single wire only. Each band may advantageously be made
to contain 40 wires (20 telephone and 20 test wires)--that is a separate band for each
strip of switches in each division of each section-and there being 6 divisions in each
section it is evident that six bands of wires will be required to make connection with
a single horizontal layer of strips.
Each of the six bands is made to extend the length of the entire board. The bands
are supported horizontally and directly in rear of the horizontal strips which carry
the spring jack switches with which their wires are to be connected-preferably some
of the bands are placed above and some in rear of others. Each band is formed with
each wire led out in a loop from it at distances apart equal to the distance between a
division of one section and the corresponding division of the next section.
Each wire also when so led out does not when again passed into the band occupy
the same position in the band as it occupied previously but is made to occupy a
different position, for example if the wire were at the front edge of the band it would
next be placed into the band at the back edge or at some intermediate part of the

page_text: band and so on with all the wires preferably in such manner that no two wires will
occupy relatively the same positions between any two of the corresponding spring
jack switches.
The strips of spring jack switches may be constructed to be removed from the front
or from the rear as may be most convenient.
The six sets of bands have been described as having their wires connected with a
single horizontal layer of strips across the board-this has been found a convenient
manner of making the connections.
It is evident however that the manner of grouping the bands with respect to their
connections with the strips of spring jack switches may be varied without departing
from the invention so long as the different wires are caused to break joint as to relative
position as above described.
In order to avoid difficulties in the work attending the extension of a multiple station
the bands are continued beyond the tables all prepared to be connected with the
requisite number of additional tables. The wire loops are left uncut until the new
tables are ready to be connected.
For the same purpose the connection between the bands and the return cables may
be arranged in such manner that the bands are provided only with the returning wires
for one table more. The return cables are to be connected with the bands in such a
manner that the loops are formed by the connection.
TL
"ת
لبية
1
منم.
J. E. KINGSBURY.
COMPLETE SPECIFICATION.
Improvements in Multiple Switch Board Systems for Telephonic
Exchanges, and Wire Bands to be used therein.
I, JOHN EDWARD KINGSBURY of 79 Coleman Street in the City of London,
Manager, (a communication to me from abroad by The Western Electric Company of
Chicago, Illinois, United States of America) 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:---
In multiple switch board systems the switch board proper consists of a number of
duplicate sections, each section containing a switch for each of the different telephone
lines, these different sections are each divided vertically into a number of divisions, for
example each section may contain six divisions.
The spring jack switches in each division are carried by horizontal strips say 20 on
each strip and the strips are laid one above the other.
Each switch in each section has to have a wire led from it to a corresponding
switch in the next section and from that to the next and so on.
A test wire is also required for each telephone-wire, hence if there are 20 switches
on each strip the number of wires looped to each strip would be 40--and if there are
6 strips in each horizontal plane in each section six times forty wires would be required
for making the connections between the switches on these six strips of one section
with the switches on the six strips of the next section.
These wires have heretofore been built up in cables usually of forty wires in each--
the cables have been circular or oval in cross section and have been supported in
various ways at the rear of the switch board. The wires in such cables have also been
ranged in the same order relatively one to the other as they pass from a strip of any
one section to the corresponding strip of the next section.
Such a cable occupies necessarily considerable vertical space (being circular or oval
in cross section) and also, as the wires run throughout the cable in the same relative
positions one to the other (that is substantially parallel throughout the length of the
board) induction between the wires takes place to an appreciable extent.
The object of this Invention is to dispose the wires at the rear of the switch board
in such a manner that they may be spread out to the rear without occupying an undue
amount of vertical space and at the same time to change the positions of the different

page_text: wires relatively one to another as they pass from section to section so that no
two telephone wires may remain in close proximity to one another for any considerable
distance.
This is effected by making up or weaving together the wires into flat bands pre-
ferably of a depth of a single wire only. Each band may advantageously be made to
contain 4 wires (20 telephone and 20 test wires) that is a separate band for each
strip of switches in each division of each section and there being 6 divisions in each
section it is evident that six bands of wires will be required to make connection with
a single horizontal layer of strips.
Each of the six bands is made to extend the length of the entire board. The bands
are supported horizontally and directly in rear of the horizontal strips which carry
the spring jack switches with which their wires are to be connected-preferably some.
of the bands are placed above and some in rear of others. Each band is formed with
each wire led out in a loop from it at distances apart equal to the distance between a
division of one section and the corresponding division of the next section.
Each wire also when so led out does not when again passed into the band occupy
the same position in the band as it occupied previously but is made to occupy a
different position, for example if the wire were at the front edge of the band it would
next be placed into the band at the back edge or at some intermediate part of the
band and so on with all the wires preferably in such manner that no two wires will
Occupy relatively the same positions between any two of the corresponding spring
jack switches.
The strips of sprink jack switches may be constructed to be removed from the
front or from the rear as may be most convenient.
In the drawings which are illustrative of my invention,
Figure 1 is a rear perspective view of two sections of a multiple switch board
showing in a general manner the method of supporting the wires at the rear thereof.
Figure 2 is a transverse vertical sectional view showing the manner of making
connections with the spring jack switches somewhat in detail.
Figure 3 is a plan showing the manner of taking out the wires to make connection
with a single spring jack switch.
Figure 4 is a diagram illustrative of the manner of running the circuits between
two corresponding strips of spring jack switches so that the wires may break joints.
Like parts are indicated by similar letters of reference throughout the different
figures.
Referring now to Figure 1 the switch board consists of two sections and b; each
section is divided into six divisions c d e f g h; in order to make connections with
one layer of strips six times forty wires would be required; these wires I preferably
lay up in six separate bands c d e f g h¹, each band containing forty wires (as
shown more clearly in Figure 2). Each of these bands is desired to carry the wires
of twenty telephone lines; that is to say, the wires which extend to corresponding
sets or strips of spring jacks switches on the different sections of the switch board.
Thus the band may connect with a strip of division c of section and also
with the division e of section and so on as to each of the sections of the board. The
corresponding strips are preferably placed in corresponding positions in the different
sections.
In Figures 1 and 2 I have illustrated the band gl as having its wires connected with
a strip of spring jacks upon division g of board a and with a corresponding strip upon
division of board b. There being six divisions in each section it is evident that six
bands of wires will be required to make connection with a single horizontal layer of
strips extending across the entire board. If there were a less number of divisions it
is evident that a less number of bands of wires would be required. Preferably
therefore as shown more clearly in Figure 2 the wires are laid in as many bands as
there are divisions in each section, these bands being supported horizontally and
directly at the rear of the horizontal layer of strips with which their wires are to be
connected some above and some in rear of others. The wires for the next layer of
strips will be arranged in a similar manner.

page_text: In Figure 4 I have shown portions ik of two corresponding strips each portion
consisting of five spring jack switches 1, 2, 3, 4, 5.
The spring jack switches may be formed in the manner described in the specification
of a prior Patent No. 3116 of 1883.
The two wires 1 as they are disposed at the left of portion are found in front of
the wires 5 which are nearest the rear edge of the band at the left. These wires 1
may be considered as the test wire and telephone line of subscriber No.1; these wires
are connected respectively with the test piece and contacts of the switch 1 of portion i
and from thence are extended over to spring jack switch 1 of portion k. In passing,
however, from portion to portion they are run nearest the front edge of the
band; that is to say, in front of wires 4. These wires 1 continuing to the right from
switch of portion will be found nearest the rear edge of the band.
Tracing through the other sets 2, 3, 4 and 5 of the wires we shall find similar
differences of positions as compared with the other wires of the band. The particular
manner of breaking joints with the wires may be varied as desire.
Preferably however the wires are so disposed that no two sets of wires will
Occupy relatively the same positions between any two of the corresponding spring jack
switches.
In Figures 2 and 3 I have shown the sets of wires woven together in separate
bands. I do not, however, limit myself to any particular manner of holding the
wires in position behind the board, though it has been found especially convenient to
lay them up and weave them together in bands as shown. If desired a band might
contain eighty or any other number of wires.
The six sets of bands have been described as having their wires connected with a
single horizontal layer of strips across the board; this has been found a convenient
manner of making the connections. It is evident, however, that the manner of
grouping the bands with respect to their connections with the strips of. spring jack
switches may be varied without departing from the invention so long as the different
wires are caused to break joints as to relative position in the manner hereinbefore set
forth.
In order to avoid difficulties in the work attending the extension of a multiple
station the bands may be continued beyond the tables, all prepared to be connected
with the requisite number of additional tables. The wire loops projecting out from
the bands are left uncut, until the new tables are ready to be connected.
For the same purpose the connection between the bands and the return cables may
be arranged in such a manner that the bands are provided only with the outrunning
wires for one table more. The return cables are to be connected with the bands in
such a manner that the loops are formed by the connection.
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 combination with a multiple switch board of wires connecting therewith
and supported at the rear thereof said wires being connected respectively with
corresponding spring jack switches and run to break joints as to direction relatively
one with another between the different corresponding spring jack switches, substantially
as and for the purpose specified. '
2. The combination with a multiple switch board having spring jack switches
arranged thereon in horizontal layers and each section of the board consisting of an
equal number of division of bands or groups of wires arranged in sets corresponding
in number with the number of divisions of each board and each set of bands having
the wires thereof connected with the spring jack switches of a horizontal layer
extending across the switch board and the wires of each band being disposed with
respect to one another to break joints in passing between the corresponding spring
jack switches with which the different wires are connected, substantially as and for the
purpose specified.
3. The combination with a multiple switch board, of a set of corresponding strips

page_text: of spring jack switches distributed upon the different sections thereof and connecting
wires arranged in horizontal bands at the rear of the board, said wires being disposed to
break joints as to direction in passing between the corresponding strips substantially
as and for the purpose specified.
4. As a new article of manufacture, a continuous cable, having loops brought out
laterally at intervals, said loops being adapted to be subsequently connected to
corresponding strips of spring jack switches, substantially as and for the purpose
specified.
5. As an article of new manufacture a band or ribbon of wires woven together and
the different wires thereof at intervals corresponding to the intervals or distances
apart, of the different sections of a switch board being disposed in different relative
positions one to another, whereby economy of vertical space is obtained and induction
resulting in harmful cross talk avoided, substantially as and for the purpose
specified.
6. As an article of new manufacture a group of insulated wires laid up in the form
of a band and woven together, said wires extending longitudinally through the band
and at intervals corresponding in distance to the sections of a switch board being taken
out laterally for connections with the switch board substantially as and for the purpose
specified.
7. As an article of new manufacture electric wires in the form of a band woven
together to form but a single vertical layer of wires, or pairs of wires said wires
being adapted to be connected respectively with corresponding spring jack switches
of different sections of a multiple switch board, whereby the wires are brought
within the least possible vertical space at the rear of the switch board with which they
are connected, substantially as and for the purpose specified.
Dotal this 99al day of Walory 1890.