Pattern 541 Navyphone

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Pattern 541 Navyphone[1]
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

  1. Torpedo Drill Book, 1914. p. 268.
  2. Torpedo Drill Book, 1914. p. 268.
  3. Torpedo Drill Book, 1914. p. 271.
  4. Annual Report of the Torpedo School, 1909. p. 70.
  5. Torpedo Drill Book, 1914. p. 271.
  6. comparing shorter dimension to those of the round models, e.g., Pattern 1855 Navyphone
  7. Torpedo Drill Book, 1914. p. 268.
  8. Torpedo Drill Book, 1914. p. 271.

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, 1909, with Appendix (Wireless Telegraphy). Copy 7 at The National Archives. ADM 189/29.