Year: 1888

page_text: Date of Application, 5th Jan., 1888
Complete Left, 29th Mar., 1888
Complete Accepted, 6th July, 1888
I, WILLIAM FRASER of 6 Livery Street Birmingham in the County of Warwick,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is viz. to have a mouth piece that effectually closes
itself the moment you are done using it & also to prevent the whistle from coming
into operation at both ends at once, i.e. when speaking or blowing from either
end the mouthpiece you are using, it is not required to whistle (only the one at
the other end) and also to have an automatic mouth piece that can be fixed on a
wall or hanging tube or anywhere else without effecting its action. The way
perform & obtain these results will be seen & understood by the drawing.
I
Figure I is a full sized drawing which shews the various parts but not in action,
(i.e. closed) A is a tube with an end marked B. with a thro hole on both sides
marked C. D. is an inside working tube with a hole marked E. with a small hole
in the centre marked F. & with the body having an all-thro hole marked K. with
an oblong hole on one side the other end G. being the whistle. H. is the indicator.
I. is a flat collar a little larger in diar. than hole F. J. is a small volute spring
but any other kind of spring can be used altho the former is preferable.
Figure II shews the mouth piece in action. The other figures shew the parts
seperately. To use samo by slightly pressing G. in tube D. the thro hole K. is
brought exactly opposite the thro hole C. in tube A. the pressure causing spring J.
to become compressed the indicator H. with collar or valve I. is by the same pressure
or action kept hard on hole F. thereby preventing any air to get thro same & also
preventing the whistle from operating when blowing or speaking thro the mouth
piece. The moment the pressure is released tube D. springs back to its normal
position the through communication in the tubes being then closed.
The indicator H. remaining in or still keeping the valve hole F. closed, being in
the proper position for indicating the first communication from the other end, i.e. the
oblong hole in the tube D. altho the hole K. is closed from the front side the
oblong hole at the other side allows the air free access thro F. to collar or valve I.

page_text: on indicator H. said pressure blowing same out & causing the whistle to operate at
the same time.
The arrangement is fitted in one complete part a thro hole is bored thro the
mouth piece from the side the tube is then pushed in a tight fit with glue or other
suitable material and any existing mouth piece can be converted or fitted with this
new arrangement.
Thus, on a person requiring to speak through a speaking tube, provided with such
mouthpieces as described, one of the mouthpieces, is taken hold of in one hand, and
the indicator and whistle g, with tube d, pressed inwardly, so as to close the
opening, by the valve j, and to bring the holes c, e, of the tubes a and d, coincident
with the all through hole k, of the body part, when a person can speak or whistle
to some other person, at the other end of the tube.

page_text: I, WILLIAM FRASER of 6 Livery Street, Birmingham in the County of Warwick,
Engineer, 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 :-
The object of this invention, is primarily two-fold; first, to automatically close
the orifice of the mouth-piece of a speaking tube, after the same has been used, or
spoken through. Secondly, in making one only of the alarm whistles sound, on the
tube being blown through, although both whistles remain in the body part of the
connection carrying the mouth-piece.
Although a speaking tube has mouth-pieces at both ends, I will first only describe
one of them.
Figure 1 represents in vertical section, an automatically closing mouth piece, for a
speaking tube, constructed according to my invention, and which said view represents
the closing means in positions which they normally assume, when the speaking tubo
is not in use for speaking, but are in position for whistling.
Figure 2 represents a like view as figure 1, but with the parts in the positions
which they normally assume when the mouth-piece is in use for speaking purposes,
and the whistle cut off.
Figure 3 represents the said speaking-tube mouth-piece end, but with the section
taken at right angles to that of figures 1 and 2.
Figure 4 represents a front elevation of the pierced tubes, with the inner one
working telescopically within the outer one, for the opening and closing of the mouth
piece orifice.
Figure 5 represents a back elevation of the said tubes, with the rear piercings in
the positions which they normally assume, when a mouth piece is being blown
through.
Figure 6 shows a front elevation of the inside tube, figure 7 is a back elevation
of the same, and figure 8 is a longitudinal section. Figure 9 is a side elevation of
the fixed outside tube, and figure 10 a longitudinal section of the same, showing the
all-through holes in the two opposite sides.
The saine letters of reference indicate corresponding parts in the several figures
of the drawing.
a is the body connection of the mouth piece, and a' is the cupped outer end.-a³ is
an axial all through hole, directed longitudinally from the middle of the crown of
the cupped end, to the rear and screwed part a, upon which the one end of a speaking
tube is connected, and whose bore is of a diameter, or of a larger diameter than the
all-through hole a³.

page_text: is a transversely disposed tube, directed across the middle of the body part a of
the said mouth-piece, and with its front and rear piercings, becoming coincident
with the all-through orifice a³.
Working and sliding telescopically within the fixed and transversely directed
tube b, is an inwardly directed closed ended tube c, of an outside diameter, equal to
the inside diameter of the tube b, wherein it works."
The rear open end of the said tube c, is enclosed by the partially enclosed inner
end of a whistle d; and which inner end is formed flange like, against which,
the face of the valve e, comes, on its stalk indicator e being pressed inwards by the
finger of a person speaking.
The stalk as aforesaid, is guided through the cap of the whistle, and through a
middle guide e, which forms both a stop for limiting the motion of the valve, and
as a rest for the valve stalk.
is in the
The inwardly working tube c is pierced with a like hole c¹, as the hole
outer tube b, while the rear piercing is of an elongated figure, and of a greater
superficial area than its adjacent hole 2 of the outer and fixed tube.
Enclosed between the closed end of the inner tube e, and the inside of the
enclosed end of the outer tube b, is a spiral, volute, or an evolved spring f, for the
automatic closing of the orifice of the mouth piece, by pushing outwards the inner
tube c, so as to bring the unpierced front side of the tube c, over the piercing &,
the outside tube, while leaving the rear piercing of the said tube c, partially open,
wherethrough wind inwardly passes from the speaking tube to the whistle, for calling
attention.
of
The internally telescopically working tube c is guided, limited in its motion, and
prevented from rotating, by a peg or cross ping, working within two opposite
longitudinal slots e³, cut within the two opposite sides of the said tube c.
When the parts of the combined whistle and speaking tube, are in the positions as
represented in figure 1, it can be used only for calling attention, by the blowing of
the whistle, as the mouth-piece passage is blocked.
Assuming that a speaking tube is provided at each end with a combined mouth-
piece and whistle, the said speaking tube is used as follows.
Thus, on a person requiring to speak through one end of a tube, to a person at
the other end; he takes hold of the mouth-piece in one hand, with tube attached,
places his finger on the whistle cap and stalk of the valve, and then presses them
both inwards, which takes the inner tube in a position with the holes therethrough,
coincident with the holes in the outer tube, and the passage in the mouth-piece body,
and also takes the valve e, up to the flanged opening d², which thereby closes the
ingress of wind to the whistle, as represented in figure 2; the person then blows
through the mouth piece, and tube, which sounds the whistle at the other end, which
is in a position as represented at figure 1. A person to be spoken to, at the other
end, then opens his mouth-piece, in the way, and by the means as already described
with respect to the first named end, the first person then speaks, and after having
done so, he releases the whistle, and valve stalk, when the spring at the rear of the
transversely sliding and blocking tube, resumes its normal position, and automatically
closes the mouth-piece passage; the same is done at the other end of the tube, and
in both cases, leaving the whistle in the position figure 1, which can be blown from
either end.
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.
First. Closing and opening the all-through hole or passage of the mouth-piece
of a speaking tube, or a combined speaking tube mouth-piece and whistle, by a
transversely sliding tube, plate or their equivalents, suitably pierced, and operated
for the opening, by sliding in one direction, and closed or blocked automatically by a
spring, sliding the tube or the like in the other direction, substantially as described a
and set forth.

page_text: Secondly--Automatically closing the passages of speaking tube mouth pieces, by a
spring, india-rubber band or the like, which when liberated, expands, and presses
across the mouth-piece passage, a slide, thereby closing the said passage, substantially
as set forth.
Thirdly. In the whistles of speaking-tube mouth-pieces. Disposing the whistle
upon the side of the body of the mouth-piece, and providing it with a valve, secured
at the inner end of a stalk, which when the mouth-piece is in use, the stalk and
valve is pressed inwards, and the entrance to the whistle closed, substantially as
described and set forth.
Lastly. The improvements in the construction of speaking tube mouth-pieces, and
speaking tube mouth-pieces with a combined whistle, whose parts are constructed,
arranged and work, substantially as herein described and set forth in the several
figures of the drawing.