US1742380A

US1742380A - Sound-amplifying horn

Info

Publication number: US1742380A
Application number: US268476A
Authority: US
Inventors: Clyde C Farmer
Original assignee: Westinghouse Air Brake Co
Current assignee: Westinghouse Air Brake Co
Priority date: 1928-04-09
Filing date: 1928-04-09
Publication date: 1930-01-07
Anticipated expiration: 1947-01-07

Description

Jan. 7, 1930. c, FARM.'.;R 1,742,380

SOUND AMPLIFYING HORN Filed April 9. 1928 /6 lF-g Q Q [7 A9 '/J A 7 l0 2 I we ll l2 INVENTOR CLYDE C. F'AHMEH ATTORNEY a casing 1 havin a chamber 2 and a central Parmesan. 7, 193a 1 UNITED STATES.

PATENT OFFICE CLYDE c. F RMEB, or rrr'rsnunen, rENNsYLvANIA,"Ass1GNoR are THE w'EsrrNG- nousn Am BRAKE GOMIE'ANY, or WILMERDING; PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA Application flied April 9,

This invention relates to sound producing devices, and more particularly to a sound producer of the type employing a flexible diaphragm operated by fluid pressure, but which 5 is susceptible of use in connection with sound producers of any type embodying an amplifying horn.

One of the primary objects of the invention is to provide novel means for connecting the amplifying horn with the bed or casing of the sound producer, whereby t e amplifying horn can be turned in any desired direction. Another principal object of the invention is the prov1s10n of a rotatable amplifying device embodying my invention.

The sound produclng device may comprise tube 3. Mounte to engage the annularv inlet face 4 of the tube 3 is a flexible diaphragm 5, said diaphragm being secured in the casing by a cap or cover 6.

Extending outwardly from the face of the casing 1, opposite to the cover 6, is an annular externally threaded sleeve 7, which is arranged concentric with the tube 3., The outer end of the tube 3 is preferably provided with an internal seat 8, for a purpose which will be later described.

Secured to the centralportion of the dia phragm 5 and extending into the inner open end of the tube 3 is a weight 9 for regulating the vibrator movement of-the diaphragm, as in Patent 0. 1,679,011 of R. G. WVidmyer, issued July 31, 1928. The casing 1 is provided with an inlet opening 10 communicating with the chamber 2 for the reception of a feed pipe, through which fluid under pressure is su plied to the chamber 2.

In operation, when fluid under pressure is supplied to the chamber 2 and builds up prcssure therein, the diaphragm moves outwardly away from the tube 3. In moving out, com- SOUND-AMPLIFYING HORN 1928. Serial No. 268,476.

munication is opened from chamber 2 to the space within tube 3. The pressure in said chamber is then quickly reduced and the pressure on the diaphragm 5 is relieved, after which the diaphragm returns to its normal position in engagement with the tube 3. The opening movement is then repeated.

An opening 11 is provided in the cover or cap 6,-so that the chamber at the outer face of the diaphragm remains at atmospheric pressure at all times.

If desired an annular rib or collar 12 may be formed on or carried by the inner face of the cap or cover concentric with the tube 3, so as to limit the vibratory movement of the diaphragm 5.

In accordance with this invention, an amplifying horn 13 having an outer flared curved end isprovided, and this horn 13 is mounted to revolve relative to the casing 1. By way of illustration, a ballbearing connection 14 is shown between the casing 1 and the horn 13,

which is arranged in the following manner. A supporting cufi' or' sleeve 15 is provided for the inner end of the horn and is secured thereto in any desired way. This cufl' or sleeve 15 has secured thereto, the inner ball race 16, of the ball bearing connection 14, while the outer ball race 17 is connected With casing 1. As shown, the outer ballrace 17 is clamped between the threaded sleeve 7 anda flanged collar 18, which is threaded on the sleeve 7. The ball bearings 19 are confined between the inner and

outer races

16 and 17. This allows free turning of the horn 13. The inner end of the horn 1-3 and inner end of thesupporting cufi or sleeve15 is received within the seat 8 of the tube 3 in order to allow free flow of the air not my intention to limit its scope to that '2. In a sound producing device, a casing having a chamber, a resonance tube in the casing communicatmg with the chamber having an internal seat, a flexible diaphragm in the casin normally engagingthe tube, and an ampli y 3. In a sound producing device, a casing having a chamber, a resonance tube in the casing having an internal seat, a flexible diaphragm in the casing for the. tube, a sleeve on the casing extending outwardly therefrom concentric with the tube, an amplifying horn, an anti-friction bearing between the horn and casing, a supporting-cuff for the horn received in the seat in said tube, said bearing including an'inner race connected with the end and an outer race fitted on the sleeve, and a flanged collar threaded on said sleeve engaging the outer race and clamping the same on said sleeve. 4 r

4. A sound producing device comprising a casing having a chamber a resonance tube in the casing, a flexible diaphragm in the casing normally resting against the resonance tube subject to the pressureof fluid in said chamber, and an annular seat concentric with the tube and on'the opposite side thereof for limiting the movement of the diaphragm.

5. A sound producing device comprising a casing'havinga chamber, a resonance tube in the casin a flexible diaphragm in the casing norma y resting against the resonance tube subject to the pressure of fluid in said chamber, and a stop arranged in the path of movement of said diaphragm disposed on thia;e opposite side thereof from said resonance tu 6. A sound producing device comprising a casing having a chamber, a resonance tube in the casing, a flexible diaphragm normally resting against the tube and subject to the pressure of fluid in the chamber, a cover plate for the casing clampingthe diaphragm in position, and an annular seat carried by the cover plate and concentric with the tube and on the opposite side of the diaphragm from said tube, said seat being arranged in the path of movement of said diaphragm.

7. A sound producing device comprising a casing havinga chamber, a flexible diaphragm subject to'the pressure of fluid in said chamber, a vent tube, the end of which is engageable with said diaphragm and controlling communication from said chamber,

ing horn rotatably carried by the. casing and received in said seat.

to the atmos here andextending into said chamber, a exi'ble diaphragmj engageable J with .the end of said tube and controllin communication from said chamber to sai tube, and means on the outer side of the diaphragm for limiting the movement thereof away from the tube.

9. A sound producing devicev com rising device comprising a casing having a chamber adapte' to be supplied with fluid'under pressure, a flexible diaphragmtsubject to the pressure of fluid in said chamber to cause the vibration of said diaphragm, and means for limiting the vibration of said diaphragm. 10. A sound producing device com rising a casing having a chamber adapted to e supplied withfluid under pressure, a flexible diaphragm subject to the the vibration of said diaphragm in both dlrections.

11. A pneumatically operated horn comprising a casing containing a diaphragm,-

my hand.

CLYDE C. FARMEB.

res'sure of fluid in, said'chamber to cause t e vibration of said diaphragm, and means for limiting