US1743194A - Radio loud-speaker - Google Patents

Radio loud-speaker Download PDF

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Publication number
US1743194A
US1743194A US192108A US19210827A US1743194A US 1743194 A US1743194 A US 1743194A US 192108 A US192108 A US 192108A US 19210827 A US19210827 A US 19210827A US 1743194 A US1743194 A US 1743194A
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United States
Prior art keywords
speaker
diaphragms
cone
rod
radio loud
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Expired - Lifetime
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US192108A
Inventor
Deane John Bradley
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Individual
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Priority to US192108A priority Critical patent/US1743194A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12Non-planar diaphragms or cones

Definitions

  • My invention relates to improvements in radio loud speakers and the object of the invention is to devise a loud speaker which has an improved clarity of tone and in which the volume of sound therefrom is greater for a given diameter of diaphragm than is at present the case. Conversely where the volume of sound is not to be increased the diameter of the instrument can be reduced.
  • My invention consists of a loud speaker constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawing in which Fig. lrepresents a vertical section through one form of device constructed according to mounted on such rod in like fashion.
  • Fig. 2 is a vertical section thereof through the line 2-2 (Fig. 1).
  • Fig. 3 is a side elevation (partly in section) of a modified form in which no outside casing is used.
  • 1 is the base of the instrument.
  • 2 is a reproducer unit or other similar device for transforming electric Waves into sound waves.
  • 3 is a rod connected to the reproducer unit in the orthodox fashion at one end, and its other end connected-to a cone-shaped diaphragm 4 mounted on such rod and held in position by the nuts 5;
  • 6 is a second cone-shaped diaphragm mounted on the rod 3 by further nuts 5, and
  • 7 is a third cone-shaped diaphragm diaphragms 6 and 7 are spaced apart from each other and from the diaphragm 4, said diaphragms preferably being mounted so as- Figs.
  • the combination with a reproducer unit including a rod, of a plurality of spaced apart cone-shaped diaphragms concentrically mounted on the rod, the inclination of all the cone surfaces of the diaphragms being identical, and the diameters of such diaphragms varying to each other, said diaphragms inserted one within the other.

Description

Jan. 14, 1930. J. B. DEANE RADIO LOUD SPEAKER Filed May 17, 1927 .237 LTEHE'UIZ 3? Eflsans 6 Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE RADIO LOUD-SPEAKER Applicatibn filed May 17,
My invention relates to improvements in radio loud speakers and the object of the invention is to devise a loud speaker which has an improved clarity of tone and in which the volume of sound therefrom is greater for a given diameter of diaphragm than is at present the case. Conversely where the volume of sound is not to be increased the diameter of the instrument can be reduced.
My invention consists of a loud speaker constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawing in which Fig. lrepresents a vertical section through one form of device constructed according to mounted on such rod in like fashion.
my invention.
Fig. 2 is a vertical section thereof through the line 2-2 (Fig. 1).
' Fig. 3 is a side elevation (partly in section) of a modified form in which no outside casing is used.
*Like characters of reference indicate corresponding parts in the different views.
1 is the base of the instrument. 2 is a reproducer unit or other similar device for transforming electric Waves into sound waves. 3 is a rod connected to the reproducer unit in the orthodox fashion at one end, and its other end connected-to a cone-shaped diaphragm 4 mounted on such rod and held in position by the nuts 5; 6 isa second cone-shaped diaphragm mounted on the rod 3 by further nuts 5, and 7 is a third cone-shaped diaphragm diaphragms 6 and 7 are spaced apart from each other and from the diaphragm 4, said diaphragms preferably being mounted so as- Figs. 1 and 2 enclosed in a casing to simulate the appearance of the ordinary cone loud speaker it is to be understood that they can be mounted in any other type of loud speaker wherein a rod or its equivalent is employed connected to the reproduction unit, and they 1927. Serial N0. 192,108.
can also be used without any casing as depicted in Fig. 3.
By employing a plurality of cone-shaped diaphragms mounted as above described the volume of sound from the instrument can be materially increased Without increasing its diameter and improved tone is achieved. It is well known that the diameter of such instruments is limited and consequently their sound volume is limited owing to diaphragms beyond a certain size developing certain undesirable characteristics. No such defects appear in my construction.
From the above description it will be apparent that I have constructed a device which will be compact as Well as simple and in which the volume of sound therefrom, as well as the clarity of tone, is materially improved.
What I claim as my invention is:
In a radio loud speaker, the combination with a reproducer unit including a rod, of a plurality of spaced apart cone-shaped diaphragms concentrically mounted on the rod, the inclination of all the cone surfaces of the diaphragms being identical, and the diameters of such diaphragms varying to each other, said diaphragms inserted one within the other.
JOHN BRADLEY DEANE.
The
US192108A 1927-05-17 1927-05-17 Radio loud-speaker Expired - Lifetime US1743194A (en)

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US192108A US1743194A (en) 1927-05-17 1927-05-17 Radio loud-speaker

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US192108A US1743194A (en) 1927-05-17 1927-05-17 Radio loud-speaker

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US1743194A true US1743194A (en) 1930-01-14

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756281A (en) * 1949-05-03 1956-07-24 Abraham L Pittinger Explosion proof acoustic device
US3015366A (en) * 1956-12-14 1962-01-02 George M Bishop Speaker system
US3032136A (en) * 1956-09-27 1962-05-01 Jr Andrew Stewart Hegeman Loudspeaker
US4837839A (en) * 1987-08-11 1989-06-06 Avm Hess, Inc. Compact speaker assembly with improved low frequency response
US20070223772A1 (en) * 2006-03-13 2007-09-27 Pioneer Corporation Speaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756281A (en) * 1949-05-03 1956-07-24 Abraham L Pittinger Explosion proof acoustic device
US3032136A (en) * 1956-09-27 1962-05-01 Jr Andrew Stewart Hegeman Loudspeaker
US3015366A (en) * 1956-12-14 1962-01-02 George M Bishop Speaker system
US4837839A (en) * 1987-08-11 1989-06-06 Avm Hess, Inc. Compact speaker assembly with improved low frequency response
US20070223772A1 (en) * 2006-03-13 2007-09-27 Pioneer Corporation Speaker

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