Improvements in Transmitting and Receiving Attachments for Telephones.
Year: 1895

page_text: Date of Application, 30th July, 1895
Complete Specification Left. 28th Apr., 1896-Accepted, 6th June, 1895
PROVISIONAL SPECIFICATION.
Improvements in Transmitting and Receiving Attachments for
Telephones.
I, HOSEA WAIte Libbey of 55 Rutland Square, Boston, in the County of
Suffolk, and State of Massachusetts, United States of America, Physician, do
hereby declare the nature of this invention to be as follows:-
My invention relates to certain improvements in transmitting and receiving
attachments for telephones, and the invention consists of two receptacles the
casings of which are arranged one within the other, the rear of the outer one being
attached to the transmitter and the rear of the inner one to the receiver as herein-
after described.
The outer casing which is at its rear end attached to the transmitter, I prefer to
form of a bell shape, (but it might be of any other desired shape) and forms a
sound receptacle to receive the voice to be transmitted.
The inner receptacle or casing is preferably of conical form. To the inner end
of this casing is attached the receiver, the large end of this cone is cut back a
suitable distance to form a re-entrant angle the mouth being covered by a piece
which near the outer end is bent over to form a lip so that the voice delivered
from the receiver will be concentrated and delivered through the opening thus
formed. The front end of this casing is supported in the centre of the outer casing
by a small wire or other support its rear end being attached to the receiver which
is supported by the circuit wires that pass through the outer casing where they are
secured in any suitable manner thus giving support to the rear end of the inner
casing.
The object of having the conical or inner casing cut back as described to form a
re-entrant angle is to allow the voice to freely pass into the outer receptacle and
prevent the escape of sound through the inner casing.
The apparatus can be supported in any suitable place as upon a wall or desk,
and the voice will be received and can be delivered without having to place the
ear or mouth close to the apparatus.
Or the inuer casing may be cut back on both sides instead of on one side only as
before described, or a central partition might be employed instead of the conical or
inner casing. In this case the sound would be received on one side of the instrument
and transmitted on the other side but the results would not be so satisfactory as
with the construction first described.
T
2007
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Transmitting and Receiving Attachments for
Telephones.
1, HOSEA WAITE LIBBEY of 55 Rutland Square, Boston in the County of
Suffolk and State of Massachusetts United States of America, Physician, 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 certain improvements in transmitting and receiving
attachments for telephones; and the invention consists of two receptacles the
casings of which are arranged one within the other, the rear of the outer one being
attached to the transmitter and the rear of the inner one to the receiver, as herein-
after fully described, and pointed out in the claims.
Referring to the accompanying drawings,
Figure 1. represents a horizontal longitudinal section of a transmitting and
receiving attachment for telephones embodying my invention.
Fig. 2 is a front view of same.
Fig. 3 is a perspective view of the inner casing,
Fig. 4 is a vertical longitudinal section of the transmitting and receiving attach-
ment, taken on line X X of Fig. 1.
Fig. 5 is a sectional view of a modified form of the inner casing.
Fig. 6 is a front view of another modification.
A, represents the outer casing, which is at its rear end attached to the trans-
mitter B. This casing I prefer to form of a bell shape, as shown (but it might be
of any other desired shape) and forins a sound-receptacle A', to receive the voice
to be transmitted.
C, is an inner receptacle, the casing C1, of which is preferably conical form. To
the inner end of this casing is attached the receiver D. The large end of this cone
is cut back a suitable distance, as shown from c, to d, to form a re-entrant angle,
the mouth being covered by a piece E, which near the outer end is bent over to
form a lip e, so that the voice delivered from the receiver D, will be concentrated
and delivered through the opening F. The front end of this casing C₁, is
supported in the centre of the casing A, by a small wire or other support G, its
rear end being attached to the receiver D, which is supported by the circuit
wires H, H, that pass through the outer casing A, where they are secured in any
suitable manner, thus giving support to the rear end of the inner casing.
The object of having the conical casing C¹, cut back, as described, to form a
re-entrant angle is to allow the voice to freely pass into the outer receptacle A¹,
and prevent the escape of sound through the inner casing.
The apparatus can be supported in any suitable place as upon a wall or desk,
and the voice will be received and can be delivered without having to place the
ear or mouth close to the apparatus.
In Fig. 5 I have shown a modified form of the inner casing. In this case it is
cut back on both sides instead of on one side only, as before described; and in
Fig. 6, I have shown a modification in which a partition C, is employed instead of
the conical casing C¹. In this case the sound would be received on one side of the
instrument and transmitted on the other side; but the results would not be so
satisfactory as with the construction first described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1. In combination with a telephone transmittter and receiver an attachment

page_text: consisting of an outer casing to receive the voice to be transmitted and convey it
to the transmitter and an inner casing to receive the voice from the receiver and
deliver the same substantially as set forth.
2. A transmitting and receiving attachment for telephone consisting of an outer
casing A, forming a sound receptacle A¹, and inner conical casing C', the front end
of the same being cut to form a re-entrant angle as described and its mouth
covered by a piece having a lip substantially as and for the purposes set forth.
3. The combination of a telephone transmitter and casing forming a sound
receptacle attached thereto with a receiver D, and casing C', attached thereto and
arranged within the outer casing A, substantially as and for the purposes set forth.
Dated this 28th day of April 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.