GB9118527D0 - Doorviewer,speech amplifier and alarm - Google Patents

Doorviewer,speech amplifier and alarm

Info

Publication number
GB9118527D0
GB9118527D0 GB919118527A GB9118527A GB9118527D0 GB 9118527 D0 GB9118527 D0 GB 9118527D0 GB 919118527 A GB919118527 A GB 919118527A GB 9118527 A GB9118527 A GB 9118527A GB 9118527 D0 GB9118527 D0 GB 9118527D0
Authority
GB
United Kingdom
Prior art keywords
doorviewer
alarm
speech amplifier
speech
amplifier
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.)
Granted
Application number
GB919118527A
Other versions
GB2260556A (en
GB2260556B (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.)
KAY THOMAS H
Original Assignee
KAY THOMAS H
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 KAY THOMAS H filed Critical KAY THOMAS H
Priority to GB9118527A priority Critical patent/GB2260556B/en
Publication of GB9118527D0 publication Critical patent/GB9118527D0/en
Publication of GB2260556A publication Critical patent/GB2260556A/en
Application granted granted Critical
Publication of GB2260556B publication Critical patent/GB2260556B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • E06B7/30—Peep-holes; Devices for speaking through; Doors having windows
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • E06B7/30—Peep-holes; Devices for speaking through; Doors having windows
    • E06B2007/305—Microphone

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Burglar Alarm Systems (AREA)
GB9118527A 1991-08-29 1991-08-29 Doorviewer,speech amplifier and alarm Expired - Fee Related GB2260556B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9118527A GB2260556B (en) 1991-08-29 1991-08-29 Doorviewer,speech amplifier and alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9118527A GB2260556B (en) 1991-08-29 1991-08-29 Doorviewer,speech amplifier and alarm

Publications (3)

Publication Number Publication Date
GB9118527D0 true GB9118527D0 (en) 1991-10-16
GB2260556A GB2260556A (en) 1993-04-21
GB2260556B GB2260556B (en) 1994-08-31

Family

ID=10700636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9118527A Expired - Fee Related GB2260556B (en) 1991-08-29 1991-08-29 Doorviewer,speech amplifier and alarm

Country Status (1)

Country Link
GB (1) GB2260556B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE509206C2 (en) * 1995-08-30 1998-12-14 Roland Larsson Inertia Sensor
US8261491B2 (en) * 2008-04-02 2012-09-11 Leon Yulkowski Concealed electrical door operator
US20180051509A1 (en) * 2016-08-22 2018-02-22 Darwin German Smart door system and method of use
CN108756660A (en) * 2018-05-16 2018-11-06 郭志忠 A kind of Novel security window

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636757A1 (en) * 1988-09-19 1990-03-23 Lach Pierre Device for sending and/or receiving at least one item of information

Also Published As

Publication number Publication date
GB2260556A (en) 1993-04-21
GB2260556B (en) 1994-08-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950829