Year: 1886

page_text: Date of Application, 15th Dec., 1886.
Complete Left, 8th Sept., 1887.
Complete Accepted, 11th Oct., 1887
We HENRY ALONZO HOUSE and HENRY ALONZO HOUSE Jr. both of Bridgeport in
the State of Connecticut United States of America, Machinists, do hereby declare the
nature of this invention to be as follows :-
Our invention consists of an electro-phonetic telegraph sounder, whereby electric
currents received by the instrument act upon a sounding head to produce audible
sounds, and whereby the movements of said head produced by sound are the means
of transmitting like movements to another head and producing audible sounds
therefrom.
The case of the instrument consists of a metallic or other ring partially closed by
two wings, between the edges of which is an opening and two parallel arms extending
from opposite parts of the ring to one side. The ring is threaded internally, or
otherwise constructed, for the attachment of a detachable sound reflector of vulcanite
or other material which is screwed into the ring and has a flaring mouth, while between
the inner end of the sound reflector and an annular seat on the ring, is confined the
edge of a light discular sounding head a lip on which extends into a notch in the ring
and prevents the head from turning.
Upon one of the arms on the ring is supported an electro magnet which consists
of two pole pieces inserted in openings in the arm and surrounded by spools of wire,
the opposite ends of the wire being connected to binding posts carried by the opposite
arm.
The armature is a bar pivoted to a standard secured to one of the arms and
prolonged to form a finger or horn, the extent of the vibration of the arinature on its
pivot in both directions being defined by adjustable limiters, the armature being
normally held slightly above and free from contact with the magnets by a spiral
spring passing through the tubular core of the outer magnet and adjusted therein to
any desired extent by a screw.
These limiters are carried upon a bar or arm secured centrally to and projecting
from the sounding head, and consist of screws or nuts carried by said bar, and
adinstable thereon.

page_text: The bar may be bent to form two arms one carrying a limiting nut arranged to
make contact with a projecting horn, and the other carrying a limiter screw making
contact with the end of the armature. Or the bar may be straight and carry two
limiting nuts and pass through a perforation in the horn, the nuts being on opposite
sides of the horn. In either case by properly adjusting these nuts or screws, the
amount of vibration of the armature may be determined and defined, there being in
each case a direct contact between the armature and limiters, that is, the armature
itself or a positive connection thereof has a direct contact with them.
When the magnet is charged the armature is drawn thereto and the horn is brought
to bear against the upper limiter and when the magnet is uncharged the lower limiter
prevents the armature swinging beyond a very limited extent from the magnet. The
limiter arm is connected to the sounding head at or about its centre and is provided
with extended curved bearings in contact with the sounding head, which tend to stiffen
it as it is bent by the limiter or otherwise.
When the circuit is closed and the armature has spent its force against the limiter
and the sounding head is held in magnetic equilibrium, audible sounds of any kind are
distinctly received, and may also be transmitted by putting the instrument in circuit
with another of like character. The working parts of the instrument being wholly
supported by the open ring and the separated and exposed arms, are readily accessible
but to protect them from injury we use a cover consisting of a sheet of flexible metal,
vulcanite or the like bent to form a back piece and two side pieces which receive
between them the arms and completely enclose the devices supported thereby.
The cover may be secured in different ways, one consisting in providing each side
piece with a curved lip which by pressing the side inward may be carried into the
opening in the ring and then engages with the edge and holds the cover in place.
The cover may be at once released by pressing the opposite sides towards each other
with the thumb and forefinger to carry the lips away from the edges.
Dated this 15th day of Irenamber 1886
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Applicants Agent.
COMPLETE SPECIFICATION.
Improvements in Electro Phonetic Telegraph Sounders.
We, HENRY ALONZO HOUSE and HENRY ALONZO HOUSE Jr. both of Bridgeport in
the State of Connecticut, United States of America, Machinists, do hereby declare the 3
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 :-
Our invention consists of an electro phonetic telegraph sounder, whereby electric
currents received by the instrument act upon a sounding head to produce audible
sounds, and whereby the movements of said head produced by sound are the means 4

page_text: of transmitting like movements to another head and producing audible sounds
therefrom, and our invention consists in the construction of the instrument fully
described hereinafter and shown in the accompanying drawing, in which :-
Fig. 1 is a longitudinal section of an instrument embodying our invention.
Fig. 2 is a sectional plan.
Fig. 3 is a perspective view showing a modification, the case being removed.
Fig. 4 is a perspective view of the case.
Fig. 5 is a detached perspective view of sounding head and bar.
The case of the instrument consists of a metallic or other ring A, partially closed
by two wings, between the edges 2, 2, of which is an opening a, and two parallel
arms 3, 3, extending from opposite parts of the ring to one side. The ring is
threaded internally, or otherwise constructed for the attachment of a detachable sound
reflector B, of vulcanite or other material which is screwed into the ring A, and
having a flaring mouth, while between the inner end of the sound reflector and an
annular seat y, on the ring A, is confined the edge of a light discular sounding
head C, a lip 4, on which, extends into a notch 5, in the ring A, and prevents the
head from turning.
Upon one of the arms 3, is supported an electro magnet D, which as shown consists
of two pole pieces 6, 6, inserted in openings in the arm and surrounded by spools of
wire, the opposite ends of the wire being connected to binding posts 7, 7, carried by
the opposite arm 3.
The armature E, is a bar pivoted to a standard 8, secured to one of the arms 3, and
prolonged to form a finger or horn 9, and the extent of the vibration of the armature
on its pivot in both directions is defined by adjustable limiters, the armature being
normally held slightly above and free from contact with the magnets by a spiral
spring 25, passing through the tubular core of the outer magnet and adjusted therein
to any desired extent by a screw 26.
The limiters 12, 13, are carried upon a bar or arm 10, secured centrally to and
projecting from the sounding head C, and as shown, consist of a nut and screw
respectively carried by the threaded bar 10, and adjustable thereon.
In Figs. 1 and 2, the bar 10 is bent to form two arms one carrying a limiter nut 12,
arranged to make contact with the horn 9, and the other carrying a limiter screw 13,
making contact with the end of the armature.
In Figs. 3 and 5, the bar 10 is straight and carries two limiting nuts 12, 13, and
passes through a perforation in the horn 9, the nuts being on opposite sides of the
horn. In either case by properly adjusting these nuts or screws the amount of
vibration of the armature may be determined and defined there being in each case a
direct contact between the armature and limiters, that is, the armature itself or a
positive connection thereof has a direct contact with them.
When the magnet is charged the armature is drawn thereto and the horn is brought
to bear against the upper limiter 12, and when the magnet is uncharged the lower
limiter 13, prevents the armature swinging beyond a very limited extent from the
magnet. The limiter arm is connected to the sounding head at or about its centre and
is provided with extended curved bearings in contact with the sounding head, which
tend to stiffen it as it is bent by the limiter or otherwise.
When the circuit is closed and the armature has spent its force against the limiter
and the sounding head is held in magnetic equilibrium, audible sounds of any kind
are distinctly received and may also be transmitted by putting the instrument
in circuit with another of like character. The working parts of the instrument
being wholly supported by the open ring and the separated and exposed
arms 3, 3, are readily accessible, but to protect them from injury we use a cover I,
consisting of a sheet of flexible metal, vulcanite or the like, bent to form a back
piece 15, and two side pieces 16, 16, which receive between them the arms 3, 3, and
completely enclose the devices supported thereby.
The cover may be secured in different ways, one consisting in providing each side
piece with a curved lip 17, which by pressing the side 16, inward, may be carried into
the opening, and then engages with the edges 2, and holds the cover in place.

page_text: The cover may be at once released by pressing the opposite sides towards each
other with the thumb and forefinger to carry the lips away from the edges 2, 2.
We do not limit ourselves to the precise construction and arrangement of parts
shown, but having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is: :-
1. An electro phonetic telegraph sounder provided with a frame consisting of a ring
having a bearing for the sounding head, and two projecting arms supporting the
magnet and adjuncts, substantially as described.
2. The combination with the frame consisting of a ring and projecting arms, of a
cover consisting of a flexible sheet bent to form a back piece and sides enclosing the
arms, substantially as described.
3. The combination of the ring and arnis, and cover consisting of a sheet bent to
form sides and back piece, and provided with lips adapted to engage with bearings
upon the frame, substantially as described.
4. The combination of the frame having a threaded ring, seat y, and arms, and a
sound reflector screwing into the frame ring and intermediate sounding head,
substantially as described.
5. The combination with the sounding head and centrally projecting bar, of the
electro magnet, armature and limiters carried by the bar to directly limit the move-
ments of the armature, substantially as described.
6. The combination of the sounding head, bar extending therefrom, electro magnet,
pivoted armature, extended to form a horn, and limiters carried by the bar to define
the movement of the armature, substantially as described.
7. The combination of the sounding head, bar extending therefrom, electro magnet,
pivoted armature, extended to form a horn, and limiters carried by the bar to define
the movement of the armature, and spring normally holding the armature in an
elevated position, substantially as described.
8. The combination of the sounding head, and electro magnet and armature and
a bar extending from the head with adjustable bearings directly limiting the
movements of the armature, substantially as described.
9. The combination of the frame having a ring and parallel arms, sounding head
provided with a projecting bar carrying limiters, electro magnet carried by one of
the arms, and armature arranged to make contact with the limiters, substantially as
described.
10. The combination of the sounding head, magnet, armature, bar provided with two
arms carried by the head, and limiters carried by the bars to make contact with the
armature, substantially as described.
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Applicants' Agent.