NL21240C - - Google Patents

Info

Publication number: NL21240C
Authority: NL; Netherlands

Application number

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.)

1927-01-26

Publication of NL21240C publication Critical patent/NL21240C/xx

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
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

NL21240D 1927-01-26 NL21240C (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB233227A GB286841A (en)	1927-01-26	1927-01-26	Improvements in or relating to the attachment of diaphragms or oscillation members for loud-speakers

Publications (1)

Publication Number	Publication Date
NL21240C true NL21240C (xx)

Family

ID=9737673

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL21240D NL21240C (xx)	1927-01-26

Country Status (4)

Country	Link
BE (1)	BE345857A (xx)
FR (1)	FR643063A (xx)
GB (1)	GB286841A (xx)
NL (1)	NL21240C (xx)

0
- NL NL21240D patent/NL21240C/xx active
- BE BE345857D patent/BE345857A/xx unknown
1927
- 1927-01-26 GB GB233227A patent/GB286841A/en not_active Expired
- 1927-10-27 FR FR643063D patent/FR643063A/fr not_active Expired

Also Published As

Publication number	Publication date
BE345857A (xx)
FR643063A (fr)	1928-09-10
GB286841A (en)	1928-03-15

Publication	Publication Date	Title
BE365894A (xx)	1930-01-31
FR615743A (xx)	1927-01-14
FR615512A (xx)	1927-01-10
FR616005A (xx)	1927-01-21
FR616169A (xx)	1927-01-25
FR615774A (xx)	1927-01-15
FR615671A (xx)	1927-01-13
FR34783E (xx)	1927-10-21
FR34723E (xx)	1929-09-19
BE348928A (xx)
BE357037A (xx)
BE343797A (xx)
NL25659C (xx)
BE349191A (xx)
BE349534A (xx)
BE351252A (xx)
NL40796C (xx)
BE351682A (xx)
NL37515C (xx)
BE351802A (xx)
BE353530A (xx)
BE354801A (xx)	1928-11-30
BE354886A (xx)
BE354987A (xx)
BE355392A (xx)