| Mouthpiece No. 1 Standard for
Micro-telephones e.g. Telephone No. 28.
Used with a Connection, Mouthpiece No. 1 or 2.
These were replaced after 1932 by the Transmitter No. 22.
The picture shows a Mouthpiece with a Connections, Mouthpiece No. 1
fitted.
Drawing - 62998.
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| Mouthpiece No. 3 Soft rubber with
metal connection, Mouthpiece.
Used on Telephone No. 34
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| Mouthpiece No. 4 A mouthpiece of Ebonite
construction with
screwed end for use on Transmitter No's 1, 2 and 17.
Drawing - 10010.
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enlarge |
| Mouthpiece No. 5 Metal mouthpiece
and faceplate for Transmitters No. 6.
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| Mouthpiece No. 6 Horn Shaped with
a screwed end.
Used with a Connection, Mouthpiece No. 6.
For Transmitters No's 5 or 5A.
Drawing - 62625.
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enlarge
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| Mouthpiece No. 8 For Transmitters
No's 11 or 12 (ATM & Co's automatic).
American produced. |
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| Mouthpiece No. 9 Horn shaped with
a plain end.
For Transmitters No's 5 (mark NT 7) or 5A (mark NT 7).
Used with a Connection, Mouthpiece No. 7.
If a Transmitter No. 5 was repaired by the GPO factory, they were
modified to take a Mouthpiece No. 6.
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| Mouthpiece No. 10 Small mouthpiece
for use with Telephone No's 89 or 114.
Used with a Connection, Mouthpiece No's 3 or 4.
Made obsolete in 1932.
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| Mouthpiece No. 12 For use on
Telephones No. 78 and 94.
It has a 5/8" airway.
Made from Ebonite.
Used with a Connection, Mouthpiece No. 5.
Drawings - 8106 and 62825.
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| Mouthpiece No. 13 Made from
Porcelain.
Includes a Connection, Mouthpiece No. 9 cemented on.
Used with Transmitter No. 16.
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| Mouthpiece No. 14 Made from Ebonite
and is a longer version of the Mouthpiece No. 6.
Used with a Connection, Mouthpiece No. 6.
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| Mouthpiece No. 15 This is a trumpet
shaped Bakelite mouthpiece fitted to most
200 and 300 type Bakelite telephones.
The Mouthpiece locates in three slots. To remove - Use a drawing pin, push the
pin into the hole and press hard, whilst at the same time turning the
mouthpiece anticlockwise. Used with Transmitter Inset No. 10 and 13.
Two tools were also produced to aid removal. The "Key,
Mouthpiece" and the "Key, Mouthpiece
No. 15".
Drawing - 62626.
Colours - Black, Jade Green, Chinese Red and Ivory. In the 1932
Rate Book, the following colours are found - Old Gold, Oxidised Silver
and Walnut - but were phased out in the late 1930's.
Dimensions - 56mm x 68mm.
Siemens Brother Part No. 15.
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| Mouthpiece No. 16
Used with the Transmitter No.22. Could be fitted with a Transmitter Inset
No. 10 or No. 13.
Introduced after 1932.
Two tools were also produced to aid removal. The "Key,
Mouthpiece" and the "Key, Mouthpiece
No. 15".
Drawing - 62627.
Colours - Black.
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| Mouthpiece No. 17 Used with the
Transmitter No. 23 (Mark 1).
Made from
Cellulose Acetate.
These were superseded by the Mouthpiece No. 19 in 1945.
Drawing No. 62809.
Colours - Black
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| Mouthpiece No. 18 Used on Telephone
No's 145, 250 and Units, Telephone, PA.
These were also used as an alternative to Mouthpiece No. 15 when used
in exposed conditions.
Two tools were also produced to aid removal. The "Key,
Mouthpiece" and the "Key, Mouthpiece
No. 15".
Drawing - 62714.
Colours - Black.
Siemens Brother Part No. 13. They called this the hygienic
mouthpiece.
Dimensions - 34mm x 68mm.
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Click on picture to
enlarge
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| Mouthpiece No. 19 Used with
Transmitter No. 23 (Mark 1).
Made from Cellulose Acetate.
Supersedes the Mouthpiece No. 17.
Drawing - 62392.
Colours - Black
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Click on picture to
enlarge
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| Mouthpiece No. 21, 21A and 21B Plastic mouthpiece fitted to most 700 type telephones. Came in 8
colours.
Material
No. 21 - Polymethyl Methacrylate
No. 21A - ABS Copolymer
No. 21B - Polycarbonate
To remove - unscrew in an anticlockwise direction. Drawing - 91197.
Ericsson Part number - N8974 |
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