Pattern 1856 Navyphone: Difference between revisions
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The 1856 was bulkhead mounted in a cylindrical iron chassis, approximately 13cm across.<ref>estimating from ''Annual Report of the Torpedo School, 1903'', Plate 20.</ref> When the external call-up bell<ref>''Torpedo Drill Book, 1914'', p. 261.</ref> was hear to ring, someone would walk over and answer the call by swinging a rigid copper arm upward and outward 90 degrees so he could place the rubber ear cup on its end over his ear. This action switched out the bell call-up circuit and activated the transmitter and receivers. A second earpiece on a flexible copper tube could be cupped over his other ear to help isolate him from the noisy engineroom. | The 1856 was bulkhead mounted in a cylindrical iron chassis, approximately 13cm across.<ref>estimating from ''Annual Report of the Torpedo School, 1903'', Plate 20.</ref> When the external call-up bell<ref>''Torpedo Drill Book, 1914'', p. 261.</ref> was hear to ring, someone would walk over and answer the call by swinging a rigid copper arm upward and outward 90 degrees so he could place the rubber ear cup on its end over his ear. This action switched out the bell call-up circuit and activated the transmitter and receivers. A second earpiece on a flexible copper tube could be cupped over his other ear to help isolate him from the noisy engineroom. | ||
[[File:Pattern1856Navyphone_TDB1914.jpg|thumb|120px|'''Pattern 1856 Navyphone'''<br>As shown in Torpedo Drill Book, 1914. The small circle at the 1 o'clock position may be a call | [[File:Pattern1856Navyphone_TDB1914.jpg|thumb|120px|'''Pattern 1856 Navyphone'''<br>As shown in Torpedo Drill Book, 1914. The small circle at the 1 o'clock position may be a call indicating lamp.{{INF}} ]] | ||
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> | 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> | ||
Revision as of 17:47, 8 September 2009
As shown in Annual Report of the Torpedo School, 1902, the arrangement of the rigid and flexible receiver is shown oppositely in all other sources.
The Pattern 1856 Navyphone was an early example of Navyphone used in the Royal Navy, intended for use in engine room, requiring the user to walk over to it and swing up an ear piece on an arm to place it over his ear.
The 1856 first appeared around 1902 along with the Pattern 1855 Navyphone which was intended for use in quieter upper deck areas.[1] In 1903, its design was modified slightly to simplify the rotary switch that was activated by rotating the receiver arm upward.[2]
Form Factor
The 1856 was bulkhead mounted in a cylindrical iron chassis, approximately 13cm across.[3] When the external call-up bell[4] was hear to ring, someone would walk over and answer the call by swinging a rigid copper arm upward and outward 90 degrees so he could place the rubber ear cup on its end over his ear. This action switched out the bell call-up circuit and activated the transmitter and receivers. A second earpiece on a flexible copper tube could be cupped over his other ear to help isolate him from the noisy engineroom.
The transmitter was affixed by 3 screws and could be revolved (by rolling about its axis)[5] "to shake up the carbon granules."[6]
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.[7] 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.[8]
See Also
Footnotes
- ↑ Annual Report of the Torpedo School, 1902, p. 60.
- ↑ Annual Report of the Torpedo School, 1903, p. 78.
- ↑ estimating from Annual Report of the Torpedo School, 1903, Plate 20.
- ↑ Torpedo Drill Book, 1914, p. 261.
- ↑ 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
- Template:BibUKTorpedoDrillBook1914
- Template:BibUKARTS1902
- Template:BibUKARTS1903
- Template:BibUKElectricalDrillBook1924
