Improvements in Whistle Alarm Mechanism.
Year: 1899

page_text: Date of Application, 17th Aug., 1899-Accepted, 23rd Sept., 1899
COMPLETE SPECIFICATION.
Improvements in Whistle Alarm Mechanism.
We, JAMES MADISON BUTCHER and GARRETT BROWN, of Room 2, McClintock
Block, Denver, Arapahoe County, Colorado, United States of America, Gentlemen,
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:-
-
Our invention relates to improvements in alarms of the whistling class, and
while more specially intended for use in connection with bicycles, may be employed
to advantage in other relations where alarms are needed. The apparatus herein
set forth, in which our invention is embodied, comprises a casing having a chamber
in each extremity communicating with the atmosphere by way of an orifice
formed in the casing-head, and with the interior of the chamber by way of another
orifice; a reciprocating piston located in the chamber of the casing, consisting
of two separated members rigidly connected; a disk located between the piston-
members and eccentrically mounted on a spindle journaled in the casing, whereby
the rotation of the spindle turns the disk, which actuates the piston, thus forcing
the air into the end chambers of the casing and out through the openings in
the casing-heads with a whistling sound; a friction wheel fast on the exteriorly-
protruding extremity of the spindle; an arm clamped to the frame of the bicycle;
a depending arm rigidly attached to the casing and pivotally connected with
the clamp-arm; a spring connecting the two arms and normally maintaining them
in a position at right angles, or approximately at right angles to each other; and
a lever mounted on the handle-bar of the bicycle and connected by means of
a cord with a projection on the depending arm of the casing, whereby as the
lever is actuated, the casing is thrown downward in the arc of a circle, whereby
the friction wheel on the spindle is brought into engagement with the tire of
the front wheel of the bicycle. When the bicycle is moving it is evident that
this will result in the rapid reciprocation of the piston and the alternate forcing of
the air out of the opposite ends of the casing with a whistling sound.
This construction will now be described in detail, and the novel features sub-
sequently pointed out in the claims.
In the accompanying drawing
Fig. 1 is a perspective view of our improved whistle, the operating-cord being
shown attached.
Fig. 2 is a longitudinal section taken through the casing on the line Z-%,
Fig. 3.
Fig. 3 is a section taken on the line X-X Fig. 2.
Fig. 4 is a section taken on the line Y-Y Fig. 2.
Fig. 5 illustrates our improvement applied to a bicycle, the operating position
of the casing and friction wheel being indicated by dotted lines.
Fig. 6 is a section taken through the pivot-pin or rivet connecting the depending
arm of the casing with the arm attached to the clamp. This section is also taken
on the line Y-Y Fig. 2.

page_text: Fig. 7 is an end view illustrating the clamp, showing the elongated opening
through which the bolt is passed for connecting the horizontal arm with the clamp.
Similar reference characters indicating corresponding parts in these views, let
the numeral 5 designate the casing, whose extremities are each provided with
an opening 5 leading to an interior whistle chamber 6 enclosed by an auxiliary
casing 7. The main chamber 9 communicates with each chamber 6 by way of
an orifice 8. In the main chamber 9 between the auxiliary end chambers, is
located a piston composed of two members 10 connected by a plate 12. Located
between these two piston-members is a disk 13 eccentrically mounted on a
spindle 14 journaled in a sleeve 15 made, fast to the casing and having an
interior and an exterior 'projection: To the outer extremity of this spindle is
attached a friction wheel 16, preferably provided with a rubber tire 17.
Attached to the casing and projecting downwardly therefrom is an arm 18
whose lower extremity is pivotally connected with an arm 19 by means of a rivet-
pin 20. The arm 19 is provided with a socket adapted to receive one extremity
of a clamp 21, adapted to surround an arm 22 of the front fork of the bicycle.
This clamp is formed from a piece of sheet metal, bent to the proper shape, and
whose extremities overlap each other and are provided with elongated registering
openings adapted to receive a bolt 23, which passes through the end wall 19 of
the socket connected with the arm 19. This clamp-extremity is farther
surrounded by a side wall 19° and a top and a bottom wall 19ª notched to engage
the fork arm 22. The clamp 21 is secured to the end wall 19" by a nut 24. . The
arm 18 is provided intermediate its extremities, with a projection which is con-
nected with the arm 19 by a spring 25. The outer extremity of this projection
is connected with a cord 26 whose opposite extremity, after passing through a
guide 29, is attached to one arm of a lever 27 fulcrumed on the handle-bar
at 28. By pressing one arm of this lever the cord 26 is drawn upward sufficiently
to turn the arm 18 on the arm 19 and throw the friction wheel 16 into contact
with the turning wheel of the bicycle, causing the wheel 16, the spindle 14, and
the disk 13 to rotate. This rotation of the disk actuates the piston and produces
the whistling sound in the manner heretofore explained.
The purpose of the elongated opening 21" in the end of the clamp 21 is to
facilitate the insertion of the fastening screw 23 after the clamp has been passed
around the fork arm.
The rivet 20 is shouldered to prevent the parts 18 and 19 from being riveted
so tightly together as to interfere with perfect freedom of movement.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. An alarm mechanism comprising a casing having a whistling chamber in
each extremity communicating with the outer air by way of an orifice formed in
the head of the casing and communicating with the main chamber by another
orifice, a piston having two separated members suitably connected, a revoluble
disk located between said members and having its periphery in contact with both,
a spindle journaled in the casing, the disk being eccentrically mounted on the
spindle, and means for rotating the spindle for the purpose set forth.
2. An alarm mechanism comprising a casing having a whistling chamber in
each extremity communicating with the outer air by way of an orifice formed
in the end of the casing and with the main chamber by another orifice, a piston
having two separated members suitably connected, a revoluble disk located
between said members and having its periphery in contact with both members,
a spindle journaled in the casing, the disk being eccentrically mounted on the
spindle, and means for rotating the spindle, comprising an exterior friction
wheel fast on the spindle, adapted to be brought into contact with the rotating part.
3. A bicycle alarm comprising a casing having a whistling chamber com-
municating by an orifice with the outer air and communicating by another orifice

page_text: with the main chamber, a reciprocating piston composed of two separated
members, a disk located between said members which are operated by the engage-
ment of its periphery, a spindle journaled in the casing and upon which the said
disk is eccentrically mounted, an exterior friction wheel fast on the spindle,
a clamp arranged to fasten the device to the frame of a bicycle in proximity
to one of the wheels, and a suitable connection between the casing and clamp,
whereby the movement of the casing in the arc of a circle brings the friction
wheel into contact with the tire of the bicycle wheel.
4. The combination with a casing constructed to produce a whistling sound as
the air is forced out of it, a piston composed of two separated members located in
said casing, a disk located between the said members and having its periphery
in contact with both members, a spindle upon which the disk is eccentrically
mounted, and means for rotating the spindle.
5. In a bicycle alarm mechanism, the combination with a casing constructed
to emit a whistling sound as the air is forced out from within, a reciprocating
piston composed of two separated members, a disk located between the members,
which are operated by the engagement of its periphery, a spindle journaled in
the casing and upon which said disk is eccentrically mounted, and an exterior
friction wheel fast on the spindle, of a clamp adapted to connect the device with
the bicycle frame, a depending arm attached to the casing and pivotally con-
nected with the clamp arm, the depending arm being provided with a projection,
a spring connecting said projection with the clamp arm, a lever mounted on the
handle-bar, and a flexible connection between said lever and the projection on
the depending arm of the casing, whereby the pulling of the cord actuates the
casing in the arc of a circle and throws the friction wheel into contact with the
bicycle wheel.
Th
1
Ը T.L
1900