Pattern 2140 Navyphone: Difference between revisions

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The '''[[Pattern]] 2140 Navyphone''' was a Graham-type [[Navyphone|navyphone]] used in the Royal Navy, intended for ordinary working or for 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>  It first entered service in 1905.<ref>''Annual Report of the Torpedo School, 1905'', p. 72.</ref>
The '''[[Pattern]] 2140 Navyphone''' was a Graham-type [[Navyphone|navyphone]] used in the Royal Navy, intended for ordinary working or for 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>  It first entered service in 1905.{{ARTS1905|p. 72}}


[[File:Pattern2140Navyphone_TDB1914.jpg|thumb|400px|'''Pattern 2140 Navyphone'''<ref>As shown in Torpedo Drill Book, 1914.'', p. 262</ref> <br>Presumably, the little circle at upper right is the call-up button, but descriptions c1902 indicate this push was on the left side. ]]
[[File:Pattern2140Navyphone_TDB1914.jpg|thumb|400px|'''Pattern 2140 Navyphone'''<ref>As shown in Torpedo Drill Book, 1914.'', p. 262</ref> <br>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==
The 2140 was bulkhead mounted in a cylindrical iron chassis, possibly around 15cm across.<ref>inferred from Pattern 1855 ''Annual Report of the Torpedo School, 1902'', Plate 25.</ref>  It had a push-to-talk lever marked ''Press whilst talking''<ref>''Annual Report of the Torpedo School, 1902'', p. 60.</ref> (or ''Press whilst speaking''<ref>''Torpedo Drill Book, 1914'', p. 259.</ref>) 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.
The 2140 was bulkhead mounted in a cylindrical iron chassis, possibly around 15cm across.<ref>inferred from Pattern 1855 ''Annual Report of the Torpedo School, 1902'', Plate 25.</ref>  It had a push-to-talk lever marked ''Press whilst talking''{{ARTS1902|p. 60}} (or ''Press whilst speaking''<ref>''Torpedo Drill Book, 1914'', p. 259.</ref>) 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.<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> sufficed to ring the bell at both the local and remote terminals.{{CN}}  The bells were not themselves an integral part of the navyphone.<ref>''Annual Report of the Torpedo School, 1907'', Plate 10.</ref>
A call button located on the right side.<ref>''Torpedo Drill Book, 1914'', p. 262.</ref> sufficed to ring the bell at both the local and remote terminals.{{CN}}  The bells were not themselves an integral part of the navyphone.{{ARTS1907|Plate 10}}


The transmitter could probably be revolved (by rolling about its axis)<ref>''Electrical Drill Book, 1924'', p. 275.</ref> "to shake up the carbon granules"<ref>''Torpedo Drill Book, 1914'', p. 260.</ref> as in the Pattern 1855.   
The transmitter could probably be revolved (by rolling about its axis)<ref>''Electrical Drill Book, 1924'', p. 275.</ref> "to shake up the carbon granules"<ref>''Torpedo Drill Book, 1914'', p. 260.</ref> as in the Pattern 1855.   

Latest revision as of 22:18, 18 September 2012

The Pattern 2140 Navyphone was a Graham-type navyphone used in the Royal Navy, intended for ordinary working or for 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] It first entered service in 1905.[3]

Pattern 2140 Navyphone[4]
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

The 2140 was bulkhead mounted in a cylindrical iron chassis, possibly around 15cm across.[5] It had a push-to-talk lever marked Press whilst talking[6] (or Press whilst speaking[7]) 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.[8] 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.[9]

The transmitter could probably be revolved (by rolling about its axis)[10] "to shake up the carbon granules"[11] 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.[12] 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.[13]

See Also

Footnotes

  1. ↑ Torpedo Drill Book, 1914, p. 262.
  2. ↑ Torpedo Drill Book, 1914, p. 262.
  3. ↑ Annual Report of the Torpedo School, 1905. p. 72.
  4. ↑ As shown in Torpedo Drill Book, 1914., p. 262
  5. ↑ inferred from Pattern 1855 Annual Report of the Torpedo School, 1902, Plate 25.
  6. ↑ Annual Report of the Torpedo School, 1902. p. 60.
  7. ↑ Torpedo Drill Book, 1914, p. 259.
  8. ↑ Torpedo Drill Book, 1914, p. 262.
  9. ↑ Annual Report of the Torpedo School, 1907. Plate 10.
  10. ↑ Electrical Drill Book, 1924, p. 275.
  11. ↑ Torpedo Drill Book, 1914, p. 260.
  12. ↑ Torpedo Drill Book, 1914, p. 263.
  13. ↑ Electrical Drill Book, 1924, p. 286.

Bibliography

  • H.M.S.O., London (1914). Torpedo Drill Book, 1914 (Corrected to May 15) Copy in Tony Lovell's library.
  • H.M.S. Vernon. Annual Report of the Torpedo School, 1905, with Appendix (Wireless Telegraphy). Copy 22 at The National Archives. ADM 189/25.
  • H.M.S. Vernon. Annual Report of the Torpedo School, 1907, with Appendix (Wireless Telegraphy). Copy 9 at The National Archives. ADM 189/27.
  • D.T.M. Department, Admiralty (1924). Electrical Drill Book. O.U. 5317. Copy in Tony Lovell's library.

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