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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. ]] | + | #REDIRECT [[Pattern 185X Navyphones#Pattern 1855 Navyphone]] |
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| − | The '''Pattern 1855 Navyphone''' was an early example of [[Navyphone]] used in the Royal Navy, intended for use on upper decks. In modern parlance, it would be called an intercom. It first appeared around 1902 along with the [[Pattern 1856 Navyphone]] which was intended for use in engine rooms.<ref>''Annual Report of the Torpedo School, 1902'', p. 60.</ref>
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| − | [[File:Pattern1855Navyphone_TDB1914.jpg|thumb|400px|'''Pattern 1855 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. ]]
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| − | ==Form Factor==
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| − | The 1855 was bulkhead mounted in a cylindrical chassis, approximately 15cm across.<ref>estimating from ''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.
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| − | A call button on the circular face at the 1 o'clock position<ref>''Torpedo Drill Book, 1914'', p. 259.</ref> or possibly the left side<ref>''Annual Report of the Torpedo School, 1902'', p. 60.</ref> sufficed to ring the bell at both the local and remote terminals. It is possible that this call-up button and the bells which it actuated were added some time after 1902.<ref>no allusion to or depiction of them in ''Torpedo Drill Book, 1914''</ref>. It does not appear the bells were an integral part of the navyphone.
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| − | The transmitter was affixed by 3 screws and could 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>
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| − | Like most navyphones before those used in ''Lord Nelson'', ''Bellerophon'' and later classes, these phones were probably battery-powered, initially, powered in pairs off six pattern 1453 cells in a pattern 1704 battery box.<ref>''Torpedo Drill Book, 1914'', p. 263.</ref> This box was separate.
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| − | ==See Also==
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| − | * [[Pattern 1856 Navyphone]]
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| − | * [[Navyphone]]
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| − | ==Footnotes==
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| − | {{reflist}}
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| − | ==Bibliography==
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| − | <small>
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| − | *{{BibUKTorpedoDrillBook1914}}
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| − | *{{BibUKARTS1902}}
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| − | *{{BibUKElectricalDrillBook1924}}
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| − | </small>
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| − | [[Category:Communications Equipment]]
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| − | [[Category:Shipboard Equipment]]
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