An Improvement in Speaking-tubes.
Year: 1891

page_text: An Improvement in Speaking-tubes.
1, FREDERICK SCHLÜCHTNER, of Atlantic and New Jersey Avenues, Brooklyn,
in the County of Kings, and State of New York, United States of America,
Merchant, 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 an improvement in speaking tubes, and has for its object
to provide the mouth-piece thereof with an attached ear-piece, whereby messages
may be more conveniently received and transmitted than heretofore.
The invention consists in providing the mouth-piece of a speaking tube with a
branch having an car-cup connected therewith, and in the novel construction and
combination of the several parts, as will be hereinafter fully set forth and pointed
out in the claims.
Reference is to be had to the accompanying drawings, forming part of this
Specification, in which
Figure 1 is a perspective view of a mouth-piece and the attachment, illustrating
the application thereof.
Figure 2 is a perspective view of the mouth-piece and attachment, the latter being
shewn as hung up out of the way; and
Figure 3 is a partial longitudinal section through the mouth piece.
Similar figures and letters of reference indicate corresponding parts in all the
views.
The mouth-piece A may be of any well-known construction. The tube 10, how-
ever, in front of the whistle, is provided at one side with an opening 11 which
opening is surrounded by a tube 12 which tube stands at an angle, preferably less
than a right angle, to the main tube 10 of the mouth-piece, as is best shewn in
Figures 1 and 2. The tube 12 is also preferably made tapering, that is the outer
end is narrower than the inner end, and in practice it is preferred that the area of
the opening 11 should be fully as great as the diametrical area of the tube 10. To
the outer or contracted end of the branch tube 12 a flexible tube 13 is secured, said
flexible tube being provided at one extremity with an ear-cup 14 of any approved
construction. The branch tube 12 is provided with a fork or clamp 15 which fork
is adapted to receive and support the ear-cup 14 when the mouth piece is not
in use.
I desire it to be distinctly understood that the branch tube 12 may be located
back, instead of in front, of the whistle as illustrated and that the flexible tube 13
may be substituted by a rigid pipe if in practice it be found desirable.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what I
claim is-
1. A speaking-tube mouth piece provided with a branch communicating with its
interior, an ear-cup, and a connection between the ear cup and the branch, sub-
stantially as shewn and described.
2. A speaking-tube mouth piece provided with a branch pipe located at one side
extending outward at an angle therefrom and having a direct communication with
the interior, an ear-cup, and a flexible connection between the ear cup and the
branch, substantially as shewn and described.
3. A speaking-tube mouth piece provided with a branch pipe located at one side
extending outward at an angle therefrom and having a direct communication with

page_text: the interior, a clamp attached to the branch tube, an ear cup, and a flexible
connection between the ear cup and the branch, as and for the purpose set forth.
Dated this 10th day of January 1891.
F. SCHLUCHTNER.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.