Western Electric Catalogue #1 - Wedophones.com wedophones

78 WESTERN ELECTRIC COMPANY
No . 9 Switchboard-Continued
Notes:-
1 . If a section is equipped with No . 22-A drops for ringdown trunks the subscriber line signal capacity
will be reduced by 20 for each 15 of these trunks .
2. The toll cord circuits shall all be wired so that they can be used for either magneto or common
battery toll and local subscriber's lines, and with the repeating coil out on through toll connections
or in on all connections . The standard arrangement is to leave the repeating coil out on the first 4 toll
cords and in on the last cord .
In addition, . to these sections we have standard rural and combination subscriber and toll switching
trunk sections . We will furnish complete information on any of these upon request .
The frame of this board is made of birch, finished to match mahogany . The dimensions of the standard
sections are as follows : 6 ft . 3 in . high ; 2 ft . 5 in . wide ; 2 ft . 9 in . deep, from front of key shelf to rear door.
The equipment in the rear of the section is accessible by removing the rear door.
MAIN DISTRIBUTING FRAMES
The main distributing frame is of iron construction, and may be either the wall type, or arranged,
to mount separately . In the wall type the lower portion is designed to carry the protectors, consisting
of heat coils and carbon block arresters, while the upper portion of the frame carries the fuses
The separate type is designed so that one vertical may be added at a time, the vertical side carrying
the protectors, consisting of heat coils and carbon block arresters, the horizontal side being equipped with
terminal strips for connecting the outside lines .
DESKS
A wire chief's desk and chief operator's desk are provided for use with the No . 9 switchboard when
necessary .
POWER PLANT
The power plants of the No . 9-D and No . 9-C switchboards are planned on the basis of 24 and 38 volt
battery supply respectively . There is supplied a storage battery (usually E-7 cells), motor, charging
generator, together with a power switchboard, on which are mounted the necessary instruments, such as
voltmeter, ammeter, switches, fuses, etc .
A ringing machine is not ordinarily used, as it is the usual practice to provide two interrupters to
supply the ringing current .
No. 10 SWITCHBOARD
No . 10 Switchboard
The No . 10 switchboard is used in offices up to 1600 lines capacity . In general, it may be said that
the No . 10 switchboard possesses the operating and transmitting features of the No . 1 switchboard, it
being provided with repeating coils in the cord circuits, and the functions of the cut-off relay being performed
by a cut-off jack . The supervisory signals are controlled by back contact relays .
The board is provided with answering jacks and associated lamp signals and lamp supervising signals
arranged for positive supervision . It is designed for both single and multi-office districts .
PRICES ON REQUEST