Improvement in alarm-whistles
US 33437 A
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Description (OCR text may contain errors)
N, D. LAMB.
No. 33,437. Patented oct.. 8, 18.61,.'
PATENT NOYES D. LAMB, OF NORVICI'I, CONNECTICUT.
HVIPROVEMENT IN ALARM-WHISTLES.
Specification forming part of Letters Patent No. SSAT?, dated October 8, 1861.
.To @ZZ whom t may concern:
Beit known that I, NOYES D. LAMB, of the town of Norwich,` in the county of New London and State of Connecticut, have invented a new and useful Improvement in Air-Whistles; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which- Figure l is a perspective view, and Fig. 2 a section.
The nature of my invention consists in the hereinafterdescribed combination of devices for the purpose of producing sounds for signals or alarms by forcing air through the whistle with the mouth.
To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.
In the drawings, A is a tubular mouth-piece through which the air is forced into the hollow cylinder B, to which the mouth-piece is attached.
B is a hollow cylinder or receiver, and is fastened on the inside to the sounding-plate C by three bolts h b. The receiver by being constructed without the hollow perforated tube which is indispensable in steam-whistles is adapted to the capacity of the lungs, thereby producing a volume of sound which other a similar effect with the same agency cannot be produced on a steam-whistle, to which I make no claim, as my invention consists in letting the air pass into the receiver without the hollow perforated tube-an improvement 'which adapts the whistle to the use pointed out. i
C is the sounding-plate supported at the center by the standard E. The sounding-plate is fitted into the bottom of the receiveriu such a way as to form a continuous aperture D between the cicumference of the plate and the rim of the receiver.
D is the aperture extendingyentirely around the sounding-plate and permitting the air forced into the receiver to escape into the sounding-cup F.
E is the standard secured at one end to the bottom of the sounding-cup and at the other to the sounding-'plate for the purpose of connecting them together.
F is the sounding-cup, so placed as to admit the air from the receiver and allow the same to escape, aiding thereby in the production'of sound. The sounding-cup may be so secured to the standard as to slide on the' same for the purpose of varying the sound, increasing or diminishing the outlet G having that effect.
Gis the outlet for the escape of air from the sounding-cup.
H is the handle.
My improved air whistle'may ,be made of tin, brass, or any other metallic substance, and is designed for use by sailing-vessels in cases where darkness, snow-storms, or heavy fogs may make itl necessary to have means Y ready at hand forgiving alarm-signals as a precaution against collisions. The air-whistle will therefore be found useful to both the navy and the merchant service. It can be used by applying it to the mouth, and compared with the fog-horns in use by coasting-vessels it requires much less effort to produce a sound that may be heard at a greater distance, thus furnishing greater security against the danger of collisions.
VVh-at I claim as new and of my invention, and desire to secure by Letters Patent is- Letting the air into the receiver B without the hollow perforated tube, as described, for the purpose 'of giving marine signals by sounds in the manner set forth.
NOYES D. LAMB. Witnesses:
HIRAM B. CROSBY, H. -I-I. STARKWEATHER.