GB2180721B - Acoustic coupler for a telephone handset - Google Patents

Acoustic coupler for a telephone handset

Info

Publication number
GB2180721B
GB2180721B GB08523334A GB8523334A GB2180721B GB 2180721 B GB2180721 B GB 2180721B GB 08523334 A GB08523334 A GB 08523334A GB 8523334 A GB8523334 A GB 8523334A GB 2180721 B GB2180721 B GB 2180721B
Authority
GB
United Kingdom
Prior art keywords
telephone handset
acoustic coupler
coupler
acoustic
handset
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
GB08523334A
Other versions
GB8523334D0 (en
GB2180721A (en
Inventor
Leslie Muir
John Smith
Andrew Mckechnie
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.)
Unisys Corp
Original Assignee
Unisys Corp
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 Unisys Corp filed Critical Unisys Corp
Priority to GB08523334A priority Critical patent/GB2180721B/en
Publication of GB8523334D0 publication Critical patent/GB8523334D0/en
Publication of GB2180721A publication Critical patent/GB2180721A/en
Application granted granted Critical
Publication of GB2180721B publication Critical patent/GB2180721B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • H04M1/2155—Acoustic coupling

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
GB08523334A 1985-09-20 1985-09-20 Acoustic coupler for a telephone handset Expired GB2180721B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08523334A GB2180721B (en) 1985-09-20 1985-09-20 Acoustic coupler for a telephone handset

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08523334A GB2180721B (en) 1985-09-20 1985-09-20 Acoustic coupler for a telephone handset

Publications (3)

Publication Number Publication Date
GB8523334D0 GB8523334D0 (en) 1985-10-23
GB2180721A GB2180721A (en) 1987-04-01
GB2180721B true GB2180721B (en) 1988-11-16

Family

ID=10585522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08523334A Expired GB2180721B (en) 1985-09-20 1985-09-20 Acoustic coupler for a telephone handset

Country Status (1)

Country Link
GB (1) GB2180721B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313562B1 (en) * 1986-06-30 1993-04-21 FORBES, Anthony Telephone on-hold device
US5995599A (en) * 1998-08-07 1999-11-30 Pocketscience, Inc. Coupler for an acoustic coupled communications device
US6304638B1 (en) 1998-08-07 2001-10-16 Pocketmail Inc. Coupler for a communications device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449522A (en) * 1965-07-21 1969-06-10 Magnavox Co Acoustical coupler
GB1232734A (en) * 1968-11-12 1971-05-19
US3592966A (en) * 1969-03-06 1971-07-13 Xerox Corp Acoustical coupling apparatus

Also Published As

Publication number Publication date
GB8523334D0 (en) 1985-10-23
GB2180721A (en) 1987-04-01

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Legal Events

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

Effective date: 19930920