Pattern 2140 Navyphone: Difference between revisions
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<!-- [[File:Pattern1855NavyphoneCoverRemoved.jpg|thumb|400px|'''Pattern 1855 Navyphone with cover and transmitter removed'''<br>As shown in Annual Report of the Torpedo School, 1902, when it was apparently a new model. ]] --> | <!-- [[File:Pattern1855NavyphoneCoverRemoved.jpg|thumb|400px|'''Pattern 1855 Navyphone with cover and transmitter removed'''<br>As shown in Annual Report of the Torpedo School, 1902, when it was apparently a new model. ]] --> | ||
The '''Pattern 2140 Navyphone''' was a British [[Navyphone]] used in the Royal Navy, intended for ordinary working or fire control.<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> In modern parlance, it would be called an intercom, and very similar to the [[Pattern 1855 Navyphone]], differing only in having its call-up push on the right rather than the left and in that its transmitter and receiver were "more efficient".<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> | The '''Pattern 2140 Navyphone''' was a British [[Navyphone]] used in the Royal Navy, intended for ordinary working or fire control.<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> In modern parlance, it would be called an intercom, and very similar to the [[Pattern 1855 Navyphone]], differing only in having its call-up push on the right rather than the left and in that its transmitter and receiver were "more efficient".<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> | ||
[[File:Pattern2140Navyphone_TDB1914.jpg|thumb|400px|'''Pattern | [[File:Pattern2140Navyphone_TDB1914.jpg|thumb|400px|'''Pattern 2140 Navyphone'''<br>As shown in Torpedo Drill Book, 1914. Presumably, the little circle at upper right is the call-up button, but descriptions c1902 indicate this push was on the left side. ]] | ||
==Form Factor== | ==Form Factor== | ||
Revision as of 19:12, 8 September 2009
The Pattern 2140 Navyphone was a British Navyphone used in the Royal Navy, intended for ordinary working or fire control.[1] In modern parlance, it would be called an intercom, and very similar to the Pattern 1855 Navyphone, differing only in having its call-up push on the right rather than the left and in that its transmitter and receiver were "more efficient".[2]
Form Factor
The 2140 was bulkhead mounted in a cylindrical iron chassis, possibly around 15cm across.[3] It had a push-to-talk lever marked Press whilst talking[4] (or Press whilst speaking[5]) on the right side and a speaking transmitter on its face. Like many navyphones, its speaker was inside and faced rearward; a metallic horn around 60mm at its mouth came out from beneath the chassis and projected the remote speaker's voice out to the local listener.
A call button located on the right side.[6] sufficed to ring the bell at both the local and remote terminals.[Citation needed] The bells were not themselves an integral part of the navyphone.[7]
The transmitter could probably be revolved (by rolling about its axis)[8] "to shake up the carbon granules"[9] as in the Pattern 1855.
Like most navyphones before those used in Lord Nelson, Bellerophon and later classes, these phones were battery-powered, probably powered in pairs off six pattern 1453 cells in a pattern 1704 battery box near one of the two.[10] This box was separate.
Service Life
These phones were almost certainly obsolete by 1924, by which time only phones in the 2460 and 3330 series were in general use.[11]
See Also
Footnotes
- ↑ Torpedo Drill Book, 1914, p. 262.
- ↑ Torpedo Drill Book, 1914, p. 262.
- ↑ inferred from Pattern 1855 Annual Report of the Torpedo School, 1902, Plate 25.
- ↑ Annual Report of the Torpedo School, 1902, p. 60.
- ↑ Torpedo Drill Book, 1914, p. 259.
- ↑ Torpedo Drill Book, 1914, p. 262.
- ↑ Annual Report of the Torpedo School, 1907, Plate 10.
- ↑ Electrical Drill Book, 1924, p. 275.
- ↑ Torpedo Drill Book, 1914, p. 260.
- ↑ Torpedo Drill Book, 1914, p. 263.
- ↑ Electrical Drill Book, 1924, p. 286.
Bibliography
