US1293797A - Attachment for phonographs. - Google Patents

Attachment for phonographs. Download PDF

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Publication number
US1293797A
US1293797A US13152116A US13152116A US1293797A US 1293797 A US1293797 A US 1293797A US 13152116 A US13152116 A US 13152116A US 13152116 A US13152116 A US 13152116A US 1293797 A US1293797 A US 1293797A
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sound
conduit
amplifier
perforation
resonant
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US13152116A
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Frank T Kent
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Definitions

  • Figure 1 is a plan view of the sound tube and sound box of a well-known type of phonograph
  • Fig. 2 is an enlarged fragment of Fig. 1 with the sound tube shown in section and provided with my improvement;
  • Fig. 3 is aview similar to Fig. 2 but showing another form of the invention
  • Fig. 4 is a perspective view of the attachment shown in Fig. 2; I
  • Fig. 5 is a section showing a slight modification of Fig. 3.
  • 10 indicates the sound tube which carries at the end 11 a goose-neck 12, this goose-neck having a 1
  • a plug or diaphragm such as is indicated at 16
  • the sounds emanating from the sound-box 13 will be greatly mufiied.
  • the amplifier 17 projects'from"the diaphragm or partition 16 into the gooseneck,in the direction of movementor propagation of the sound waves.- Care should'b'e exercised, however, to have the amplifier "17 out of contact with the goose-neck12 and thus supported entirely bythe diaphragm 16, which should be of non-resonant material such as rubber so as to 'con stitute'aj'nonresonant connection between the 7 goose-neck and the amplifier. i It will be observed'that the sound box-'13 may be readily removed from or replaced readily inserted or removed from thejposi t'on shown in Fig. 2.
  • this construction comprises the well-known rubber disk 18 which is attached directly to the end of the goose-neck 12f and'has secured thereon, by means of screws 19, th'e sound-box 20.
  • the amplifier 23 projects throiigh the disk 18 into the goose-neck 12': and operates in substantially the same manner as the amplifier 17 shown in Fig. *2.”
  • Fig. 5 the modification consists in mar-i ing the disk 21 integral with the disk 18" so that the sound amplifier 23 willbe carried by the disk 18' and the separate diaphragm 21 shown in Fig. 3, eliminated.
  • a substantially cylindrical member made of nonresonant material and provided With a central longitudinal perforation and a funnelshaped member made of resonant material, and having its smaller end secured in said perforation.
  • a sound conduit a member made of non-resonant material and detachably arranged on the end of said c0nduit, a sound box detachably secured to said member, a disk arranged between said memher and said sound box, and having a central perforation, and a funnel-shaped sound amplifier having its smaller end secured in said perforation and supported Wholly by said disk.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Description

F. T; KENT.
ATTACHMENT FOR PHONOGRAPHS.
APPLICATION FILED NOV. 15. 1916.
L293 797 Patsmed Feb, 11, 1919.
gm'umtoz pnirnn sraans manna orrron.
FRANK T. KENT, OF HOME, NEW YORK.
ATTACHMENT FOR PHONOGRAPHS.
aeayzoa.
Application filed November 15, 1916. Serial No. 131,521.
- to the standard types of phonographs and which when so applied will improve the quality of the reproduction by reducing or eliminating the metallic and mechanical sounds.
Other objects and the features of novelty will be apparent from the following description taken in connection with the accompanying drawings, in which,
Figure 1 is a plan view of the sound tube and sound box of a well-known type of phonograph;
Fig. 2 is an enlarged fragment of Fig. 1 with the sound tube shown in section and provided with my improvement;
Fig. 3 is aview similar to Fig. 2 but showing another form of the invention;
Fig. 4 is a perspective view of the attachment shown in Fig. 2; I
Fig. 5 is a section showing a slight modification of Fig. 3.
Referring to the drawings, 10 indicates the sound tube which carries at the end 11 a goose-neck 12, this goose-neck having a 1 I have discovered that by placing a plug or diaphragm such as is indicated at 16, in the end 14 of the goose-neck, near the soundbox 13, and providing a central perforation in this diaphragm, the sounds emanating from the sound-box 13 will be greatly mufiied. I have also found that by inserting a miniature megaphone or sound amplifier 17 in the said perforation in the diaphragm 16, the sounds will be restored to substantially the normal volume but the harsh mechanical sounds will be largely eliminated, thereby giving greater promi- Referring to the nence to the sounds that are reproduced Specification of Letters Patent. Patented Fat). 11, I
from the record and making the reproduction more natural. As will be observed from Fig. 2, the amplifier 17 projects'from"the diaphragm or partition 16 into the gooseneck,in the direction of movementor propagation of the sound waves.- Care should'b'e exercised, however, to have the amplifier "17 out of contact with the goose-neck12 and thus supported entirely bythe diaphragm 16, which should be of non-resonant material such as rubber so as to 'con stitute'aj'nonresonant connection between the 7 goose-neck and the amplifier. i It will be observed'that the sound box-'13 may be readily removed from or replaced readily inserted or removed from thejposi t'on shown in Fig. 2.
form' of the invention illustrated in Fig. 3,'it'will be-observed that this construction comprises the well-known rubber disk 18 which is attached directly to the end of the goose-neck 12f and'has secured thereon, by means of screws 19, th'e sound-box 20. I arrange between the disk 18 and the sound-box a diaphragm 21 havingfa small central aperture 22 in which'a miniature megaphone or sound amplifier 23' is secured. The amplifier 23 projects throiigh the disk 18 into the goose-neck 12': and operates in substantially the same manner as the amplifier 17 shown in Fig. *2."
In Fig. 5 the modification consists in mar-i ing the disk 21 integral with the disk 18" so that the sound amplifier 23 willbe carried by the disk 18' and the separate diaphragm 21 shown in Fig. 3, eliminated.
It will be noted that the receiving end of the amplifier, in the different forms of the invention, is relatively small and located close to the sound box and it seems that this location produces much more satisfactory results than when the amplifier is at a position in the sound tube, more remote from Having described the invention What is claimed 1s:
'1. In apparatus of the class described, the combination of a sound conduit, a sound box detachabl'y mounted on one end of said conduit, a sound amplifier projecting into said end of the conduit and through which the sounds are conveyed from said sound box, and non-resonant means through which said amplifier is supported in said conduit.
2. In apparatus of the class described, the combination of a sound conduit, a non-resonant member supported at one end of said conduit and provided with a central longitudinal perforation, a sound amplifier carried by said member and projecting into said sound conduit, and a sound boxon said end of the conduit and from which the sounds are transmitted to the sound conduit by said amplifier.
3. In apparatus of the class described, the combination of a sound conduit, a source of sound connected therewith, a non-resonant partition across said conduit and having a perforation extendin longitudinally of the conduit, and a. sound amplifier secured in said perforation.
4. In apparatus of the class described, the combination of a sound conduit, a source of sound connected therewith, a non-resonant partition across said conduit and having a perforation extending longitudinally of :ne conduit, and a sound amplifier secured in said perforation and supported entirely by said partition.
5. In apparatus of the class described, the combination of a sound conduit, a source of sound connected therewith, a non-resonant partition across said conduit and having a perforation extending longitudinally of the conduit, and a sound amplifier secured in said perforation and projecting from said partition in the direction of movement of the sound waves.
6. In apparatus of the class described, the combination of a sound conduit, a sound box detachably mounted on one end of said conduit, a non-resonant partition fitting the interior of said end of the conduit and provided with a perforation extending longitudinally of the conduit, and a sound amplifier secured in said perforation.
7. In apparatus of the class described, the combination of a sound conduit, a sound amplifier supported in said conduit by means constituting a non-resonant connection therebetween, and a sound box detachably mounted on said conduit and transmittiiig sound through said amplifier to the conduit.
8. In apparatus of the class described, the combination of a member made of non-resonant material and adapted to fit the interior of a sound conduit, said member having a central perforation, and a funnel-shaped sound amplifier projecting from one side of said member and having the smaller end thereof arranged in said perforation.
9. As a new article of manufacture, a substantially cylindrical member made of nonresonant material and provided Witha central longitudinal perforation and a funnelshaped member made of resonant material, and having its smaller end secured in said perforation.
10. In apparatus of the class described, the combination of a sound conduit, a member made of non-resonant material and detachably arranged on the end of said c0nduit, a sound box detachably secured to said member, a disk arranged between said memher and said sound box, and having a central perforation, and a funnel-shaped sound amplifier having its smaller end secured in said perforation and supported Wholly by said disk.
In testimony whereof I aflix my signature.
FRANK 'I. KENT.
flople: of this patent may be obtained for five cents each, by addressing the Commireioner of Patents.
Washington, D. t3.
US13152116A 1916-11-15 1916-11-15 Attachment for phonographs. Expired - Lifetime US1293797A (en)

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US13152116A US1293797A (en) 1916-11-15 1916-11-15 Attachment for phonographs.

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