J. B. ROGERS.
HORN OBL WHISTLE.
APPLICATION FILED Nov.19,1906.
Patented' Aug. 20,191.2.
- @Q5/065;@ Egg/6x15 To all cU/wm u; may concern:
ir ss Armar Erica.
JAMES B. ROG-:Ellisy 0F CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CARL E.l
n WESCOTT, 0F CHICAGO, ILLINOIS.
vHORN 0R WHISTLE.
Specification of Letters Patent.
Patented Aug. 2o, 1912.
Application led November 19, 1906. Serial No. 343,993.
Be it known that l, JAMES B. ROGERS, a citizen of the United States, residing at Chi! cago, in the county of Cook and State of Illinois, have invented new and useful lmprovements in Horns or Vhistles, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.
This invention relates to a horn or whistle which is particularly adapted for use in connection with automobiles, although it is to be understood that it may be employed in any situation-where anaudible signal-of the kind is desired.
One of the objects of the invention is to provide a horn or whistle of simple construction having high sounding power and which may be operated by the exhaust of an explosive lengine or by steam or compressed further object is to provide, in a horn or whistle, novel means for varying the pitchl thereof.
Other objects and advantages of the invention will 'be apparent from the following specification.
The invention consists of theorganization and arrangement of parts hereinafter parof Fig. 1; Fig. 5 is a fragmentary perspec` tive view, on an enlarged scale, of the tonguev of the whistle; Fig. 6 is a detail view of the tongue adjusting stem; Fig. 7 is a view in front elevation showing a modification of the invention; and, Fig. 8 is 4a sectional view on the line 8 8 of Fig. 7
Referring to the drawings, the numeral 10 indicates a preferably cylindrical resonator or sounding chamber having near its lower 'end a sound orifice 11; This resonator may be made of sheet metal or it may be cast,
.and it is preferably elongated, as shown. The upper end of the cylinder 10 is closedv as by means of a removable screw cap 12.
At its lower vend the cylinder 10 is screw threaded to' receive the threaded end of noz- Aof the nozzle.
z le 13 adapted to beatt'ached to a'connection leading from a suitable source 'of' fluid pressure. This nozzleis provided with an enlarged chamber 1,4 the side walls of which taper or are inclined inwardly and upwardly to form an elongatedrestricted discharge orifice 15. I
A tongue or lip 16 is located at the sound yorifice 11, and the lower edge thereof isv so positioned as to be impinged by the blast issuing from the orifice 15 of the nozzle 13. This tongue may be stationary, as shown in Figs. 7 and 8, as by being formed integral with the cylinder 10, or it may b'e mounted a'djustably on the cylinder as shown in Figs. 1, 2 and 3. With either arrangement, the edge of the tongue is in the line or path of the blast issuing from the orifice 15, lthe inclination of the walls of the chamber 14 being such that the resultant angle lor direction of discharge is in line with' the lower edgeof the tongue.
ln the modification shown in Figs. 7 and 8, illustrating the'integral tongue, the 'wall of the cylinder above the sound orifice 11 is in Fig. 8 to provide such tongue.'
In the construction shown in Figs. 1, 2
and '3, which illustrate the preferred embodiment of the invention, the tongue is adjustable so as to vary the area 'of the sound orifice and consequently vary the pitch, but irrespective of the position of the tongue the edge lthereof is always'in direct line with the blast issuing from the Anozzle orifice.l The tongue 16 may be mounted and adjusted in any suitable manner. I
In the embodiment illustrated in Figs. 1, 2 and 3, the tongue consists of'a flat metal plate., shown as rectangular in shape` Athe side edges of which are adapted to guides 17 located at the side edges of the sound orifice. vThe side' edges ofthe sound orifice are inclined inwardly as they approach the bottom of the,orifice,and the guides 17 .are
corres ondin'vlv inclined and at 'arch angle C .l D l that the lower edge of the tongue will al- Ways be maintained in line with the
orifice A rod 18 is pivotally connected to and between ears 19 on the tongue and this rod passes through an opening in a
bracket 20 secured to thecylinder 10 to guide the rod. As shown' in Figs. 1 and 6 the rod is provided wit-h notches 21 which;
are adapted to engage a tooth 22 projecting blast.
into 'the opening in the
bracket 20, and a leaf or other suit-
able spring 23 serves to hold the notches in 'engagement withthe. tooth 22 to maintain. the tongue in adjusted s rposltlon. A coiled spring 2a, encircling the rod and reacting against a finger piece 25 -fand the bracket 2 0 tends 4to hold thejrod "at the upward limit of lits' movement, such limit being defined'bya stop -26 on the rod.
crimped or bowed 'transversely v above the.
ledge thereof, as at'f27, for thel purpose of providing an additional surface to be" im-. pingedby `the blast in order to increasel the resonance ofthe tongue," which being loosely mounted vibrates asl it isacted on by they The nozzlemay be connected with l 'a source of compressed air or steam. supply or to the exhaustpipe ofthel explosive engine of an automobile, a'suitable valve be- Iing provided and operated in yany suitable vmanner to admit the operatingfluid or gases to the whistle.l
'In operation the blast lissues from the oriice 15 and im'pinging against the tongue produces they sound, the fluid being divided and part thereof beingp directed .by the.
tongue into the sounding chamber. In any position of thetongue it is prevented from- 30 gravitatingdownwardly byv means of the spring 24, the' tongue being maintained "thereby normally in its uppermost position in 'which position a low tone ispr'oducedi If, however, it is desired to produce a tone of high pitch the connecting rod is shoved downwardlyv lowering the tongue and correspondingly decreasing the size of the sound orifice. Owingtol the cooperating toth and notches and the spring' the tongue will l4 0'be maintained in 'any' position of adjustment. By disengaging the rod from the tooth`22 the tongue may be moved upwardly o r downwardly to gradually vary the p'itch,
. the tone changing gradually from highpitch to low pitch, or vice versa. The clonvgated sounding chamber 10'is of especial im;
portance when the whistle is intended to be operated by the'exhaust of an explosive engine which is of pulsating character, as vthe -gases build up therein and provide a cush ion which 'equalizes the pulsations of the exhaust, thereby ena ling -the whistle when in operation to prodiice a-constant tone. By
providing' the removable cap 12 access is readilyobtained to the 'interior ofthecyl@ inder for cleaning purposesfwhich is mportance when' the whistle is oper's hv the..' exhaust of an explosive e ngin e,' a
wise the cylinder and inner face lof lthe tongue would soon become thickly coated with carbon imparting the resonance of thev whistle.
Itis 'to be yunderstood that, bythe term l 'u tongue as used in the foregoing description `and in the appendedciaim, l mean thatl part of a whistle of this general type against which .the blast is directed. 'i -l-laving thus described my invention, what In a. whistle, va hollow member forming sound orifice, a' blast inlet,` longitudinal guiding means at the sides if said orifice, a aid guides, said tongue slidably mounted in tongue having its edge in line with the blast inlet, a shank connected with said tongue,
.pitch of the whistle. 1
In Witness whereof, I have hereunto subscribed my 'name in the presence of two witnesses.
JAMES B. ROGERS.
lVitnesses'z M. R. RocHrom),
Amirun` B. Sniom.'
'I1 claim as new and desiretosecure by Let- .ters Patent, is: 7 0.
Sa sound chamber, said member having a -said shank having a series of retaining teeth