Pattern 541 Navyphone
Presumably, the little circle at upper right is the call-up button, but this was actually located on the left side.[Inference]
The Royal Navy's Pattern 541 Navyphone was a refined little handset model suitable for use in cabins. It replaced the clumsy cabin model derived from the Pattern 2108A Navyphone[2] It was first used in Bellerophon,[3] being introduced in 1909.[4]
Form Factor
The case was oval-shaped and would be mounted on a bulkhead[5] with its long axis vertical. It dimensions may have been about 130mm across and 200mm tall.[6]
It featured a hemispherical bell on the front of the case and an angled handset with transmitter and receiver hung on a hook on the right hand side. The hook made the ringing circuit when the phone was hung up. The handset also featured a "speaking circuit break", which might mean a push-to-talk push or switch.
A small circle on the diagram might be the call-up push button.[7]
Service Life
The phone was fairly short-lived, as the Pattern 2462 Navyphone was used in Orion in 1911 or so[8].
See Also
Footnotes
- ↑ Torpedo Drill Book, 1914, p. 268
- ↑ Torpedo Drill Book, 1914, p. 268.
- ↑ Torpedo Drill Book, 1914, p. 271.
- ↑ Annual Report of the Torpedo School, 1909, p. 70.
- ↑ or on a table, per Torpedo Drill Book, 1914, p. 271.
- ↑ comparing shorter dimension to those of the round models, e.g., Pattern 1855 Navyphone
- ↑ Torpedo Drill Book, 1914, p. 268.
- ↑ Torpedo Drill Book, 1914, p. 271.
Bibliography
