US1700441A - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
US1700441A
US1700441A US596932A US59693222A US1700441A US 1700441 A US1700441 A US 1700441A US 596932 A US596932 A US 596932A US 59693222 A US59693222 A US 59693222A US 1700441 A US1700441 A US 1700441A
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US
United States
Prior art keywords
base
horn
acoustic device
receiver
sinuous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US596932A
Inventor
George R Lum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US596932A priority Critical patent/US1700441A/en
Application granted granted Critical
Publication of US1700441A publication Critical patent/US1700441A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching

Definitions

  • This invention relates to acoustic devices and particularly to portable loud speaking receivers.
  • the object is to provide a-unitary type 5 of loud speaking receiver which is cheap to manufacture and capable of delivering a large volume of sound without noticeable distortion.
  • the resent invention provides a combination horn and stand for a loud speaking telephone receiver.
  • the horn has a tortuous shaped opening giving the effect of a much larger horn and the base which is integral therewith is hollow providing space in which the amplifying apparatus may be mounted.
  • Fig. 1 is a cross-sectional view on line 1--1 of a receiver embodying the invention.
  • Fig. 2 is a rear view broken on line 22.
  • the receiver consists of a body portion 6, the horn proper, and a hollow base? integral therewith for supporting it. Within the base is mounted a translating device or receiver unit 4. Both the. body and base portions are preferably made of fibrous material and continuous.
  • the horn may conveniently be made in two symmetrical sections and cemented together, or otherwise joined along the line 1-1. The air path of the horn is sinuous throughout its length and increases at the same rate as anconical horn having a straight airassage of the same length.
  • the axes of a l'sinuous sections of the opening lie preferably in the same plane.
  • a threaded ferrule 8 serving to support the receiver unit 4 which is provided with a threaded flange 11 for engagement therewith.
  • a base plate 9 of any suitable material such as cardboard or fibre is attached to -the periphery of the base by cement or any other suitable means.
  • This I. base late may be covered by suitable shock absor ing material 10 such as felt,
  • a sound amplifying device com rising a horn of fibrous material having a bell portion, a hollow base portion integral therewith, said base being in the form of a hollow outwardly flared portion to provide a chamher for the reception of a receiver unit, a sinuous passagev leading from the base to the bell portion, said passage being composed of contiguous sinuous sections lying one above the other in the same vertical plane, a memher attached to the smaller end of the horn within the base for supporting said unit, and plates of shock-absorbing material secured to the large end of the flared portion of the base.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

Jan. 29, 1929.
G. R. LUM
ACOUSTIC DEVICE Filed Oct. 26. 1-922 Patentecl Jan. 29, 1929.
UNITED STATES PATENT OFFICE.
GEORGE LUM, 01' NEW YORK, N. Y., ASSIGNOB T WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. 'Y., A CORPORATION 01' NEW YORK.
I aoousrrc DEVICE.
I Application filed October 26, 1922. Serial No. 596,832. g
This invention relates to acoustic devices and particularly to portable loud speaking receivers.
The object is to provide a-unitary type 5 of loud speaking receiver which is cheap to manufacture and capable of delivering a large volume of sound without noticeable distortion.
The resent invention provides a combination horn and stand for a loud speaking telephone receiver. The horn has a tortuous shaped opening giving the effect of a much larger horn and the base which is integral therewith is hollow providing space in which the amplifying apparatus may be mounted.
In the drawing, Fig. 1, is a cross-sectional view on line 1--1 of a receiver embodying the invention. i
Fig. 2 is a rear view broken on line 22.
The receiver consists of a body portion 6, the horn proper, anda hollow base? integral therewith for supporting it. Within the base is mounted a translating device or receiver unit 4. Both the. body and base portions are preferably made of fibrous material and continuous. The horn may conveniently be made in two symmetrical sections and cemented together, or otherwise joined along the line 1-1. The air path of the horn is sinuous throughout its length and increases at the same rate as anconical horn having a straight airassage of the same length. The axes of a l'sinuous sections of the opening lie preferably in the same plane. Attached to the smaller end of the horn and within the base is a threaded ferrule 8 serving to support the receiver unit 4 which is provided with a threaded flange 11 for engagement therewith. In 40 cases where it is desired to include a transformer 5, this may be conveniently done by securing it to the receiver unit 4 in any wellknown manner. A base plate 9 of any suitable material such as cardboard or fibre is attached to -the periphery of the base by cement or any other suitable means. This I. base late may be covered by suitable shock absor ing material 10 such as felt,
The invention claimed is:
A sound amplifying device com rising a horn of fibrous material having a bell portion, a hollow base portion integral therewith, said base being in the form of a hollow outwardly flared portion to provide a chamher for the reception of a receiver unit, a sinuous passagev leading from the base to the bell portion, said passage being composed of contiguous sinuous sections lying one above the other in the same vertical plane, a memher attached to the smaller end of the horn within the base for supporting said unit, and plates of shock-absorbing material secured to the large end of the flared portion of the base. 66 In witness whereof, I have hereunto subscribed my name this 24th day of October A D., 1922.
GEORGE R. LUM.
US596932A 1922-10-26 1922-10-26 Acoustic device Expired - Lifetime US1700441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US596932A US1700441A (en) 1922-10-26 1922-10-26 Acoustic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US596932A US1700441A (en) 1922-10-26 1922-10-26 Acoustic device

Publications (1)

Publication Number Publication Date
US1700441A true US1700441A (en) 1929-01-29

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Family Applications (1)

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US596932A Expired - Lifetime US1700441A (en) 1922-10-26 1922-10-26 Acoustic device

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