FR729187A - Improvements in vibratory devices and production processes for these devices - Google Patents

Improvements in vibratory devices and production processes for these devices

Info

Publication number
FR729187A
FR729187A FR729187DA FR729187A FR 729187 A FR729187 A FR 729187A FR 729187D A FR729187D A FR 729187DA FR 729187 A FR729187 A FR 729187A
Authority
FR
France
Prior art keywords
devices
production processes
vibratory
vibratory devices
processes
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
Application number
Other languages
French (fr)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products 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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR729187A publication Critical patent/FR729187A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/22—Clamping rim of diaphragm or cone against seating
FR729187D 1931-01-13 1932-01-04 Improvements in vibratory devices and production processes for these devices Expired FR729187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US729187XA 1931-01-13 1931-01-13

Publications (1)

Publication Number Publication Date
FR729187A true FR729187A (en) 1932-07-19

Family

ID=22110547

Family Applications (1)

Application Number Title Priority Date Filing Date
FR729187D Expired FR729187A (en) 1931-01-13 1932-01-04 Improvements in vibratory devices and production processes for these devices

Country Status (1)

Country Link
FR (1) FR729187A (en)

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