US1445500A - Amplifier for talking machines - Google Patents

Amplifier for talking machines Download PDF

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Publication number
US1445500A
US1445500A US524654A US52465421A US1445500A US 1445500 A US1445500 A US 1445500A US 524654 A US524654 A US 524654A US 52465421 A US52465421 A US 52465421A US 1445500 A US1445500 A US 1445500A
Authority
US
United States
Prior art keywords
amplifier
talking machines
talking
machines
wruesf
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
US524654A
Inventor
Duchesne Henri Hormisdas
Charuest Pascal
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.)
Benoit & Mathieu
Original Assignee
Benoit & Mathieu
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 Benoit & Mathieu filed Critical Benoit & Mathieu
Priority to US524654A priority Critical patent/US1445500A/en
Application granted granted Critical
Publication of US1445500A publication Critical patent/US1445500A/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
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Description

Feb. 13, 1923.
H. H. DUCHESNE ET AL.
AMPLIFIER FOR TALKING MACHINES.
FILED DEC,24|19Z1.
hwenfors li/lDuc/resne #PC/wruesf
US524654A 1921-12-24 1921-12-24 Amplifier for talking machines Expired - Lifetime US1445500A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US524654A US1445500A (en) 1921-12-24 1921-12-24 Amplifier for talking machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US524654A US1445500A (en) 1921-12-24 1921-12-24 Amplifier for talking machines

Publications (1)

Publication Number Publication Date
US1445500A true US1445500A (en) 1923-02-13

Family

ID=24090127

Family Applications (1)

Application Number Title Priority Date Filing Date
US524654A Expired - Lifetime US1445500A (en) 1921-12-24 1921-12-24 Amplifier for talking machines

Country Status (1)

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US (1) US1445500A (en)

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