GB1467569A - Projection screen units - Google Patents

Projection screen units

Info

Publication number
GB1467569A
GB1467569A GB3426775A GB3426775A GB1467569A GB 1467569 A GB1467569 A GB 1467569A GB 3426775 A GB3426775 A GB 3426775A GB 3426775 A GB3426775 A GB 3426775A GB 1467569 A GB1467569 A GB 1467569A
Authority
GB
United Kingdom
Prior art keywords
projection screen
screen units
spool
loud speaker
box
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
GB3426775A
Other languages
English (en)
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.)
NECKERMANN VERSNAD KG A
Original Assignee
NECKERMANN VERSNAD KG A
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 NECKERMANN VERSNAD KG A filed Critical NECKERMANN VERSNAD KG A
Publication of GB1467569A publication Critical patent/GB1467569A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
GB3426775A 1975-01-17 1975-08-18 Projection screen units Expired GB1467569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7501295 1975-01-17

Publications (1)

Publication Number Publication Date
GB1467569A true GB1467569A (en) 1977-03-16

Family

ID=6649712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3426775A Expired GB1467569A (en) 1975-01-17 1975-08-18 Projection screen units

Country Status (11)

Country Link
AT (1) AT335537B (enExample)
BE (1) BE832380A (enExample)
CH (1) CH595649A5 (enExample)
DD (1) DD121196A5 (enExample)
DK (1) DK350075A (enExample)
FR (1) FR2298122A1 (enExample)
GB (1) GB1467569A (enExample)
IT (1) IT7560414U1 (enExample)
LU (1) LU73134A1 (enExample)
NL (1) NL7600054A (enExample)
SE (1) SE7508721L (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7707290U1 (de) * 1977-03-09 1977-06-30 Mechanische Weberei Gmbh, 4792 Bad Lippspringe Lichtbildprojektionswand mit lautsprechern

Also Published As

Publication number Publication date
AT335537B (de) 1977-03-10
LU73134A1 (enExample) 1976-03-02
SE7508721L (sv) 1976-07-19
BE832380A (fr) 1975-12-01
DD121196A5 (enExample) 1976-07-12
FR2298122A1 (fr) 1976-08-13
CH595649A5 (enExample) 1978-02-15
NL7600054A (nl) 1976-07-20
ATA579975A (de) 1976-07-15
DK350075A (da) 1976-07-18
IT7560414U1 (it) 1977-02-14
FR2298122B1 (enExample) 1979-05-11

Similar Documents

Publication Publication Date Title
AU510556B2 (en) Loudspeaker diaphragm
AU508491B2 (en) Method and apparatus for improving the bass reproduction ofa loudspeaker
AU510704B2 (en) Speaker cabinet
CA1027053A (en) Stereophonic sound system
GB2000941A (en) Headphone with two resonant peaks for simulating loudspeaker reproduction
GB1553630A (en) Stereophonic sound reproduction apparatus
GB1083467A (en) Loudspeaker arrangement for stereophonic sound reproduction
AU498468B2 (en) Web threading
AU503909B2 (en) Rear screen projector
CA1025415A (en) Bobbin assembly
CA1025549A (en) Dynamic loudspeaker
CA1029611A (en) Diaphragm for loud speaker
GB1147810A (en) Loud speaker assembly
USD243620S (en) Listening center
GB1548674A (en) Sound reproduction systems
USD248297S (en) Loud speaker
JPS5313335A (en) Audio amplifier
JPS52139345A (en) Audio amplifier
USD242876S (en) Musical drum
JPS53129023A (en) Dynamic loudspeaker
JPS51117616A (en) Dynamic speaker
JPS52104911A (en) Speaker unit
GB1420714A (en) Multiloudspeaker assemblies for stereophonic sound reproduction
USD242874S (en) Musical drum
USD242856S (en) Controlled reluctance microphone display

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee