Auxiliary Mouth-piece for Telephones.
Year: 1891

page_text: Date of Application (in United Kingdom), 3rd Sept., 1891
Complete Specification Left. 3rd Sept. 1891-Accepted. 5th Dec., 1891
COMPLETE SPECIFICATION.
Auxiliary Mouth-piece for Telephones.
I, WILLIAM NATHANIEL MARCUS, Oil Merchant, of 218 North Second Street,
Philadelphia, State of Pennsylvania, Ú.S.A., do hereby declare the nature of my
invention for AUXILIARY MOUTH-PIECE FOR TELEPHONES, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
It is a well-known fact that telephones are extensively used by persons of
different heights, and most telephones are used by persons standing.
To get the best results from a telephone-transmitter the voice of the speaker
must be projected on the transmitter-diaphragm direct. For that reason I have
invented an adjustable mouth-piece, which mouth-piece may be adjusted at will, so
as to bring the same to a level with the mouth of the person speaking, which
enables him to project his voice directly against the transmitter-diaphragm without
standing on the toes or bending of the back.
My invention consists of a bent tube, to one end of which is fixed a trumpet
mouth-piece, the other end being fitted in a friction socket, and by which socket
the tube is attached to the transmitter-box of the telephone by clamp-springs, as
illustrated in the accompanying drawings, in which―
Figure 1 is an edge view of the telephone-transmitter box with my improved
mouth-piece attached.
Fig. 2 is a front view of Fig. 1.
Fig. 3 is a cross-section of Figs. 1 and 2 on line X Y of Figs. 1 and 2.
Fig. 4 is a front view of the mouth-piece and friction-socket.
Fig. 5 is a top view of Fig. 4.
Figs. 6 and 7 are views of the friction-collar.
Fig. 8 is a front view of the friction-socket and spring-clamps.
Fig. 9 is an edge view of Fig. 8.
Similar letters of reference in all the views indicate like parts.
A represents the transmitter-box, which is constructed in the usual manner and
forms a part of the telephone-case.
B is a tube, which may be made of hard rubber or metal. It should be made
with a smooth interior.
E is a trumpet mouth-piece fixed on the outer end of tube B. At the other
end is a collar F. This collar I prefer to make of cork and fit it tightly on the
tube. a is a small collar and is also fitted tightly on the tube B.
G is a metal socket, to which are fixed spring-clamps D D.
The
The front lid of the transmitter-box is turned out saucer-shaped directly in
front of the transmitter-diaphragm. Over this is fitted the socket-plate G, which
is held in place by spring-clamps D D, as shown in Figs. 1, 2 and 3.
springs DD exert a pressure on the plate G and collar F, which collar being
tight on the tube the friction against the plate G and lid of box A will hold the
tube in such position as it may be placed.

page_text: To use my improved mouth-piece, the speaker raises or lowers the trumpet
until it is in line with the speaker's mouth, when the tube B will receive the voice
and project it directly against the transmitter-diaphragm J.
If desired, the mouth-piece may be used on either side of the box A.
In place of clamp-springs D D, the plate G may be fastened to the box A by
wood-screws.
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 an auxiliary mouth-piece for telephones, the combination, with a socket-
plate G and clamps for attaching the same to a telephone box, of a rigid bent
tube passing through said socket-plate and capable of rotation therein, having a
collar rigilly fixed thereon, the socket-plate being arranged to press against the
collar to secure frictional bearing for the tube, substantially as described.
2. In an auxiliary mouth-piece for telephones, the combination, with a socket-
plate for attaching the same to a telephone box, of a rigid bent tube passing
through said socket-plate and capable of rotation therein, having a collar rigidly
fixed thereon, the socket-plate being arranged to press against the collar to secure
frictional bearing for the tube, substantially as described.
Dated this 3rd day of September 1891.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.