Improvements relating to Telephones.
Year: 1896

page_text: Improvements relating to Telephones.
1, FRANOIS LAUDER MUIRHEAD, of Princes Street, in the City of Westminster,
Esquire, do hereby declare the nature of this invention to be as follows:-
My invention relates to a telephonic combination applicable more especially for use
between the bridge and engine room or between other parts of a vessel or in such
other places where, while a convenient combination of transmitter and receiver and
their adjuncts is desired, the ordinary instruments are unsuitable by reason of their
liability of becoming damaged by exposure to the weather and the like.
In carrying my invention into practice I prefer to employ a telephone receiver
somewhat on the pattern of the well-known Gower-Bell instrument but any other
suitable instrument may be employed in which the coils are wound to give the
maximum effect in the circuit to be worked and combined therewith a suitable
transmitter in such manner as to form a secure and compact apparatus for the desired
purpose.
According to my invention both the transmitter and receiver are contained within
a box-like casing. Two adjacent apertures are provided on one side of the casing
from each of which runs a tube, one to the transmitter and the other to the receiver.
Projecting ontwardly from this same side of the casing is a trumpet. The base of
this trumpet is closed by a disc in which are two adjacent apertures corresponding
with those on the side of the casing. Within the trumpet is a partition dividing it
into channels so that an aperture is at the bottom of each channel. The trumpet thus
constructed is mounted upon the side of the casing in such manner that when the
apparatus is in use the apertures of the former are immediately over those of the
latter. In this way one half of the trumpet forms the connecting passage with
the transmitter and the other that with the receiver and I am enabled to ntilize
one trumpet for both instruments. The trumpet is so mounted that it is capable
of being rotated on its axis to a certain extent by a lover affixed to it or otherwise
and by turning it the passages to the transmitter and receiver respectively can
be closed and the instruments contained within the casing cut off from exterior
influences.
I may, by connecting additional parts to the trampet and providing the necessary
electrical connections, so arrange the apparatus that, in the act of rotating the trumpet
to open the passages to the telephonic apparatus, it will actuate successively two
switching dovices located within the casing the one operating to close the circuit
of a call bell and the other completing the telephonic circuit. Any other suitable
switching or circuit-controlling devices may be employed when the arrangement is a
multiple circuit one.
In some cases I may provide a cover or lid over the mouth of the trumpet having a
hinge constructed with one or more cam-shaped projections which latter operate,
through a connecting rod or otherwise, to actuate the said switching or circuit-
controlling devices located within the casing. In its normal state the trumpet is kapt
covered but on throwing the cover back the said devices are successively operated.
1000
A. F. SPOONER,
124 Chancery Lane, W.C., Agent for the Applicant.

page_text: I, FRANOIS LAUDER MUIBHEAD, of Princes Street, in the City of Westminster,
Esquire, 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 :-
My invention relates to a telephonic combination applicable more especially for use
between the bridge and engine room or between other parts of a vessel or in
such other places where, while a convenient combination of transmitter and
receiver and their adjuncts is desired, the ordinary instruments are unsuitable
by reason of their liability of becoming damaged by exposure to the weather and
the like.
In carrying my invention into practice I prefer to employ a telephone receiver
somewhat on the pattern of the well-known Gower-Bell instrument but any other
suitable instrument may be employed in which the coils are wound to give the
maximum effect in the circuit to be worked and combined therewith a anitable
transmitter in such manner as to form a secure and compact apparatus for the desired
purpose.
In the accompanying drawings,
Figure 1 is a front view, and
Figure 2 is a side view partly in section showing my improved combination
instrument.
Like letters indicate corresponding parts throughout the drawings.
A is a metal or other box-like casing, A is a disc shaped piece of wood or other
suitable material, B is an outer trumpet or conical shaped mouth piece projecting
from, and rotatably mounted upon, one side thereof, and B is an inner second trumpet
situated concentrically within the first or onter trumpet B. B' is a handle or lever
for rotating the said trampets as hereinafter described.
Within the casing A and upon the piece A are arranged a transmitter (and a
receiver D, two adjacent apertures A', 'A' being provided in one side or the front of
the said casing, a tube E communicating between the aperture A' and the
transmitter C, and a tube E' in like manner communicating between the other
aperture A and the receiver D. The bases of both the trumpets B and B' are closed
by a disc in which are two adjacent apertures F, F which when the said trumpets
are rotated upon their common axis through a certain angle by means of the handle
or lever B' will respectively correspond with the apertures A' und A' in the side or
front of the casing A. G is a stop against which the handle B is normally retained
by a suitable spring (not shown in the drawing), or its equivalent, and G' is another
stop against which the said handle engages whon moved into the position shown in
dotted lines in Figure 1.
It will be seen that the trampets are so constructed and mounted upon the side of
the casing that when the apparatus is in use and the suid trumpets are turned or
rotated so that the apertures F', F' are immediately over or correspond with the
apertures A', A communicating through the tubes E, E' respectively with the
transmitter and receiver D, the annular portion or clearance left between the outer
trumpet B and the inner trumpet B' forms the connecting passage with the receiver D
and the central hole in the inner or smaller trumpet B' that with the transmitter C.
I am thus enabled to utilize what is practically one trumpet for both instruments.
Upon releasing the handle or lever B' the trompets will be returned to their normal
position under the action of the berein before mentioned spring or its equivalent and
the apertures F, F and A', A', ceasing to correspond, the passages to the transmitter
and receiver respectively will be closed and the instruments contained within the
casing cut off from exterior influences.

page_text: Instead of the concentric trumpets herein before described I may employ a single
trumpet provided with an internal partition dividing it into channels in such a manner
that there will be un aperture at the bottom of each channel.
I nay, by connecting additional parts to the trumpets or trumpet and providing
the necessary electrical connections, so arrange the apparatus that, in the act of
rotating the said trumpets or trumpet to open the passages to the telephonic apparatus
two switching devices located within the casing will be successively operated, the
one to close the circuit of a call boll and the other to complete the tolephonic circuit.
Any other suitable switching or circuit-controlling devices may be employed when tho
arrangement is a multiple circuit one.
In some cases, moreover, 1 may provide a cover or lid over the month of the
concentric trumpets or partitioned trumpet, which cover or lid has a hinge constructed
with one or more cam-shaped projections which latter operate, through a connecting
rod or otherwise, the said switching or circuit-controlling devices located within the
casing. Under normal conditions the mouth of the concentric trumpets or partitioned
trumpet is kept covered, bnt on throwing the cover back the said devices are
successively operated.
Having now particularly described and ascertained the nature of my said inven-
tion; and in what mannor the same is to be porformed, I declare that what I
claim is
1. An improved telephonic apparatus wherein concentrically arranged trumpets, or
a single trumpet provided with a suitable partition, can, by rotating the said trumpets
or trumpet through a certain angle or by other suitable means, be brought into
communication respectively with a transmitter and a receiver, substantially as and for
the purpose set forth.
2. An improved tolephonic apparatus comprising a receiver in which the coils are
50 wound as to give the maximuin effect in the cironit to be worked, and a suitable
transmitter, both arranged within a box-like casing, and concentrically arranged
trumpets, or a single trumpet provided with a partition, so mounted upon the side or
front of the said casing that by rotating the said concentric trumpets or divided
trumpet through a certain anglo, communication can be established between the latter
and the said receiver and transmitter respectively, substantially as described.
3. The modification of my said invention wherein I so arrange the said apparatus
that the act of rotating the concentric trumpets or partitioned trumpet to open the
passages to the telephonic apparatus will actuate successively two switching devices
located within the casing thereby closing the circuit to a call bell, and the telephonic
circuit; substantially as described.
4. The modification of my said invention wherein I provide the mouth or aperture
of the concentric trumpets, or partitioned trumpet, with a cover or lid so arranged
that by means of cam-shaped or other projections upon its hinge and a suitable
connecting rod, or otherwise, the opening and closing thereof will actuate suitable
switching or circuit controlling devices within the casing, substantially as
described.
5. The improved combination telephonic apparatus substantially as described
with reference to the accompanying drawings, and operating as and for the purpose
specified.
A. F. SPOONER,
323 High Holborn, London, Agent for the Applicant.