Year: 1899

page_text: Date of Application, 1st Nov., 1899
Complete Specification Left. 1st Aug. 1900-Accepted. 1st Nov.
1900
HENRY CAPEL LOFFT HOLDEN, Major Royal Artillery, Royal Arsenal, Wool-
wich, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved form of portable telephone apparatus
complete in itself with call bell and battery for actuating the microphone trans-
mitter.
The whole of the apparatus is contained in a small case of wood or other mate-
rial; the terminals to which the line wires are attached being outside. The handle
by which the box is carried in so contrived that it locks the lid to the lower part
of the box when being carried.
The box has two compartments, one holding the battery for the microphone
the other the magneto generator, bell and induction coil which are all combined
together and connected by flexible wires with a block of insulating material
carrying the terminals to which the cord conductor to the operator's telephone is
connected, in such a manner that by removing two or more screws the complete
arrangement can be detached from the box. The cord contains five conductors
separately insulated and joined to separate terminals in the operator's telephone;
the transmitter and receiver of the operator's telephone are respectively mounted
on two short tubes, through which the conductors pass, and these short tubes end
in flanges, which flanges have holes for the two bolts which connect them
together between the two flanges is a cylinder of ebonite diametrically divided
in halves one bolt passing through each half; one of the motors is fixed and
carries the contacts and rocking lever switch, the other half is removable with
its bolt, forming a cover for and allowing the parts of the switch to be easily
examined or renewed. The electrical connections are so arranged, that when the
magneto is in use the telephone and induction coil are short circuited and when
the telephone is in use the magneto and bell are short-circuited; the wires and
terminals are colored so as to conduce to their easy identification and simplicity
of renewal in case of breakage.
Dated this 31st day of Octoboy 1900.
H. C. L. HOLDEN,
Major R.A.

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
My invention relates to an improved form of portable telephone apparatus
complete in itself with call bell and battery for actuating the microphone trans-
mitter.
In order that my said invention may be more clearly understood and readily
carried into effect I will proceed to described the same more fully with reference
to the accompanying drawings in which Fig. 1 represents the apparatus and
Fig. 2 is a diagram of the electrical connections, Fig. 3 showing the detail of the
handle for locking & carrying. The whole of the apparatus is contained in a
small case A of wood or other suitable material, the terminals B to which the
line wires are attached being outside the case A, so that the line wires may be
equally well attached when the case is open or closed. The handle C by which
the box is carried is attached to the lid by two plates W so that it can be turned
about its longer axis by means of the grip U and is so contrived that it locks the
lid to the lower part of the box by means of the studs D on either side of the
box which engage with the bent portions V of the handle C when the latter is
turned into the vertical position for carrying by the grip U. The box A has
two compartments one E holding the battery F for the microphone, and the
other G containing the magneto generator H, which is attached to the box by two
screws only, which pass through the front of the box and screw into two holes T
in the base of magneto, as well as the bell I and the induction coil J which are
all combined together in one piece of apparatus and connected by flexible wires K
with a block of insulating material L carrying the terminals M to which the
5 conductor cord N to the operator's telephone 0 is connected, in such a manner
that by removing the two above-mentioned screws the whole apparatus can be
taken out of the case A. The cord N contains five conductors separately insulated
and joined to separate terminals in the operator's telephone. The transmitter
and receiver of the operator's telephone are respectively mounted on two short
tubes, through which the conductors pass and these tubes end in flanges which
have holes in them P for the bolts which connect them together. Between the
two flanges is a cylinder of ebonite diametrically divided in halves, one bolt pass-
ing through each half, one of the halves R is fixed and carries the contacts and
rocking lever switch the other S is removable with its bolt forming a cover and
showing the parts of the switch to be easily inspected and renewed when neces-
sary. The electrical connections are so arranged as shown in Fig. 2, which is
a diagram of the electrical connections, that when the magneto and bell are in
use the telephone receiver and induction coil are short circuited and when the
telephone is in use the magneto and bell are short circuited. The wires and
terminals are colored so as to conduce to their easy indentification and also to
simplicity in renewal of wires or parts in case of breakage as well as to ease of
testing and facility for locating and removing faults.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In a portable telephonic apparatus; the combination of case with its locking
and carrying arrangements, containing an operator's telephone and magneto call
system combined, electrically connected in the manner explained, substantially
as described and for the purposes set forth.
2. An improved portable telephonic apparatus substantially as described.
H. C. L. HOLDEN,
Major R.A.