US606668A - Fog-whistle - Google Patents

Description

No. 606,668. Patented 1u|y.5, |898.

s. H HuNTI-m.

Foc WHISTLE. (Application filed Dec. 1,A 1897.)

(No Model.)

UNITED STATES#v PATENT sILAs H. HUNTER, or CLEVELAND, OHIO.

Foc-WHISTLE. e

SPECIFICATION forming part of Letters Patent No. 606,668, dated July 5, 1898. e

Application led December 1, 1897.d Serial No. 660,341. (No model.)

To L ZZ whom itin/bag concern:

Be it known' that I," SILAS H. HUNTER, of Cleveland, Cuyahoga county',- Ohio, have invented certain new and useful Improvements in Fog-Whistles; and I dohereby declare the'V following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My inventionrrelates to fog-whistles; and

it consists in the peculiar construction of the same, aswill be hereinafter fully set forth and claimed.

' In the drawing the iigure is a view in vertical section of a whistle embodying my invention. l

A represents a steam-pipe leading from a steam-boiler and provided with a Valve B, operated in the usual, manner. To the upper end of'pipe A is secured a pipe T-fitting C, the branches c c' being so secured to pipe A as to be vertical and the branch c2 being preferably formed larger than branches c c and extending in a horizontal direction. The branches c, c', and c2 of the T-ittin g are screwthreaded, and the lower branch c is screwed on pipe A. The branch c is provided with a plug D, screwed therein, the aforesaid plug D extending upward, forming ashaft D', the function of which will be hereinafter fully set forth.

Screwed into the branch c2 of the T-tting C is a flaring hollow casting E, provided at its contracted end with a spider E', the hub e of which is internally screw-threaded to receive the screw-threaded stem fof the flaring I diaphragm E! The outer circumference of the uppefn of diaphragm F is slightly less than the` inner circumference of the upper end of the casting E, thus forming the steamy ports f of the whistle. The bell or sounding-c linder G is secured in proper relation to'fhelpmwly means of a spindle F', which extends out from diaphragm F and is screwthreaded at its outer end f3. The bell G is provided with a female screw-thread g, which engages Vthe screw-thread f3, and a jam-nut g2, securing the parts tightly together and in proper relation. y

I-I represents a trumpet formed steam or air tight except at its mouth or outlet, which surrounds the whistle-bell G, thus intensifying the sound and projecting it in the desired direction. The object or purpose of surrounding the whistle with a steam or air tight metallic drum or cover is the forcingor projecting the sound of the .whistle through the dense atmosphere which is caused by a fog. After a number of experiments it has been found that the forcing'or projecting of the sound from a 'steam-whistle is best accomplished -by providing a steam-tight( trumpet or cover which surrounds the whistle and Vwhich is greater in length than the whistlebell andextends beyond'thegsaid bell. The base or contracted end ofthe trumpet II is screw-threaded internally, as ath, the said screw-thread h engaging an external screwthread c' on the exterior of casting E, thus making the casting E the base of the trumpet and holding the same in position and in relation to the bell G. By the above construction and arrangement the sound ofthe whistle is concentrated and projected in the desired direction, and also the trumpet being formed of sonorous metal," such asrcopper or aluminium, the vibration ofthe sounding cylinder or bell is impartedl to the trumpet, and thus the sound isintensiiied. Y

Inasmuch as the force of the steam as it issues from the port j" is very great and the vibrations are also very high, Ifmd it necessary to provide guys J J', thelower guyJ betrumpet, as at j, and at the other end to the steam-pipe A, as at j. The upper guy J is secured at one end to the mouth of the trumpet, as a't jg, and at the other end is secured to the upper end of shaft D'. The guys brace the trumpet and keep it steady, or, as Vfar as possible, free from undue vibration.

ving secured at one end to the mouth ofthe In a fog-whistle constructed according to my invention the distance to which the sound is carried in a given direction is far greater than in whistles of the ordinary construction, and the Whistle being projected in a horizontal direction and surrounded by the trumpet the sound is intensified and is also projected in the desired direction. f

What I claim is- 1. A fog-whistle comprising a steam-feed pipe, a suitable steam port and a bell or sounding-cylinder, the said bell or soundingcylinder being inclosed by a trumpet, said IOO trumpet being open only at its mouth or forward end, substantially as and for the purpose shown and described.

2. In a fog-Whistle, the combination With the Whistle-bell of a steam or air tight trumpet open only at its mouth or forward end, said trumpet surrounding the said bell, substantially as and for the purpose shown and set forth.

In a fog-Whistle, the combination with the Whistle including the sounding-bell and a steam-supply pipe and suitable ports, of a steam or air tight trumpet surrounding the said bell or souudine-cylinder, the trumpet provided with sustaining-guys secured at the mouth of said trumpet at one end and at the opposite end to suit-able supports substantially as aud for the purpose shown and described.

it. In a fog-Whistle, the combination with the whistle proper, of a trumpet surrounding the bell of the said whistle, the said trumpet being` internally screw-threaded at its inner or contracted end, and an external ser-ewthread on the Whistle proper, and engagingr the internal screw-thread of the trumpet, whereby the trumpet is held in proper relation to the Whistle proper, substantially as shown and deserbed.

5. In a fog-whistle, the Combination with the pipe A, T-fitting C, plug D with shaft D' fitting,r into the upper end of the T-fitting, Casting E and diaphragm F, bell G and trumpet II surrounding the bell G, and provided with guys .I J eonneeted at one end to the mouth of the trumpet and at the other end, respectively, to the steam-pipe A and the shaft D', all operating substantially as and for the purpose shown and described.

In testimony whereof I sign this specification, in the presence of two Witnesses, this 10th day of November, 1897.

SILAS II. IIUNHER. lVitnesses:

W. E. DONNELLY, ELLA E. TILDEN.

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