GB168176A - Improvements in dispatcher's telephone apparatus - Google Patents
Improvements in dispatcher's telephone apparatusInfo
- Publication number
- GB168176A GB168176A GB1565920A GB1565920A GB168176A GB 168176 A GB168176 A GB 168176A GB 1565920 A GB1565920 A GB 1565920A GB 1565920 A GB1565920 A GB 1565920A GB 168176 A GB168176 A GB 168176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- horn
- rotatably
- transmitter
- arm
- 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
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
- H04M1/04—Supports for telephone transmitters or receivers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
168,176. Hackett, P. J. June 9,1920. Telephone instruments and sets; mouthpieces and earpieces and attachments; supporting; wall sets.-A wal set allowing adjustments between the various elements, comprises a loud-speaking receiver 25 to which is acoustically connected an amplifying-horn 16, and a transmitter 19 connected to the outer end of the horn, the whole apparatus being rotatably and slid ably mounted as a self-contained unit upon a supporting-arm 4 which is adjustable vertically and rotatably in brackets 5. The horn is rotatably mounted in a sleeve 10 lined with felt 15, which sleeve is connected by rivets 11 to the sleeve 9 on the arm 4. A spring 27 pressing a ring 28 against the sleeve 10 always keeps the horn tightly fitted in the sleeve. The transmitter has an extension mouthpiece comprising three relatively rotatable parts 21, 22, 23.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1565920A GB168176A (en) | 1920-06-09 | 1920-06-09 | Improvements in dispatcher's telephone apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1565920A GB168176A (en) | 1920-06-09 | 1920-06-09 | Improvements in dispatcher's telephone apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB168176A true GB168176A (en) | 1921-09-01 |
Family
ID=10063117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1565920A Expired GB168176A (en) | 1920-06-09 | 1920-06-09 | Improvements in dispatcher's telephone apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB168176A (en) |
-
1920
- 1920-06-09 GB GB1565920A patent/GB168176A/en not_active Expired
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