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Patented June 30, 1903.
UNITED STATES PATENT OFFICE.
OLIVER P. SAMMONS, OF DENISON, TEXAS.
TELEPHONE TRANSMITTER AND RECEIVER.
SPECIFICATION forming part'of Letters Patent No. 732,449, dated June 30, 1903.
Application filed July 14,1900. Serial No, 23644. (No model.)To all whiorn it may concern:
Be it known that I, OLIVER P. SAMMONS, a
citizen of the United States, residing at Deni-
son, in the county of Grayson and State of
5 Texas, have invented a new and useful Tele-
phone Transmitter and Receiver, of which.
the following is a.specification.
My invention relates to telephones, .and
more particularly to repeaters for the same;
io and it has for its object to produce a device,
which maybe connected with the wires of
what are known as "long-distance" tele-
phones for the purpose of taking up the
weakened vibrations and resnergizing them,
15 as it were, and transmitting them with in-
creased volume, whereby the ordinary tone
of voice may be transmitted any desired dis-
tance by simply providing the wires over
which it is transmitted with a sufficient num-
20 ber of my improved repeaters to take up the
weakened vibrations and send them forward
with increased energy and volume.
With these objects in view my invention
consists in the improved construction and-
25 novel arrangement of parts of a telephone-
repeater, as will be hereinafter more fully
set forth.
In the accompanying drawing, which is a
diagrammatic view, partly in section, I have
- 30 shown one form of embodying my invention.
In the drawing, 1 and 2 indicate the ordi-
nary wires of a metallic circuit and which
may extend between any two desired points
of conversation and be provided with any
35 ordinary instruments at the ends, which form
no parts of my invention and are therefore
not shown in the drawing. Located at suit-
able distances along the line are one or more
repeaters, each of which is preferably mount-
40 ed upon a base 3 and inclosed within a suit-
able sound-proof box or casing 4.
Located within the box 4 is a receiver 5 and
a transmitter 6. The diaphragm 7 of the re-
ceiver is supported upon shoulders 8 adja-
45 cent to the end of its casing, and the dia-
phragm 9 of the transmitter is correspond-
ingly supported upon shoulders 10, said
shoulders being preferably insulated from
their casings. The two casings are arranged
50 as close together as possible, so as not to be
in actual contact, and communicate with
each other through a suitable tube or con-duit 11. The usual convexed carbon back
12 is secured, adjustably or otherwise, adja-
cent to the diaphragm 9 upon shoulders 13, 5,
which are also insulated from the casing.
Loose or granular carbon 14 is arranged be-
tween the diaphragm :) and the carbon back
12 for assisting its transmitting the electrical
current in the usual manner. One or more 6o
permanent magnets 15-preferably two-are
located within the receiver, with the poles
adjacent to the diaphragm 7, and are each
provided with wires 16, which lead to bind-
ing-posts 17 upon: the base, through which 65
connection may be made with the wires 1 and
2 by means of branch wires 18. An induc-
tion-coil 19 is secured upon the base, and
the terminals of the secondary coil are con-
nected with binding-posts 20, through which 70
connection may be made with the wires 1 and
2 by means of the branch wires 21. The
other end of one of the wires 22 of the.induc-
tion-coil is connected with the diaphragm 9,
and the other end of the other wire 23 is 75
connected with a battery 24. The other wire
25 of the battery is connected with the car-
bon back 12.
If desired, the branch wires 18 and 21 may
be provided with the usual fuses 26 or other 8o
safety appliance to prevent injury to the in-
struments.
Instead of connecting the repeaters to the
line in multiple, as shown in the drawing,
they may be connected with a single line by 85
simply running one of the branch wires to
the ground in the usual manner. The box
may be rendered sound-proof in any desired
manner, as by forming the exterior casing
larger than the casings of the transmitter 90
and receiver and filling the space with plas-
ter-of-paris or other non-combustible or non-
sound-transmitting material.
As above described, it is evident that by
using my improved repeater the sound of the 95
voice can be transmitted to any desired dis-
tance, as all that is necessary is to provide
the main line with one or more repeaters at
such points as will be necessary to- take up
the feeble or weakened vibrations in the re- 100
ceiver and transmit them to the diaphragm
of the receiver, where they will effect the
electrical circuit of the local battery in such
manner as to be transmitted from that pointNo. 732,449.,
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Sammons, Oliver P. Telephone Transmitter and Receiver, patent, June 30, 1903; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth511280/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.