Box 7: RGO 43/53-62
Contains 10 Results:
Assorted correspondence, mainly with the National Physics Laboratory, but also with other interested parties to the Rugby Radio Time Signals, 1927 - 1939
Also includes the addresses to which such corrections were regularly supplied in 1934.
Correspondence and reports furnished by UK Shipping on the worldwide reception of the Rugby Radio Time Signals, 1928 - 1931
Such reports, particularly adverse reports, were responsible for the improvements in the service that were subsequently introduced.
Correspondence between the Royal Observatory and the Loomis Laboratory, New York, 1929 - 1932
On radio time signals and information that could be used for estimating the performance of clocks in the laboratory.
Correspondence on the Rugby Time Signal with the Admiralty and the Board of Trade, 1930 - 1931
Concerning the emission of a 'warning signal' prior to the signal proper, and the provision of suitable equipment for the generation of this signal.
Assorted correspondence on the Rugby Time Signal, 1931 - 1937
Catalogue in progress. Further records will be uploaded over the coming months.
Correspondence on the transmission of a dash of ten seconds duration immediately after the Rugby Radio Time Signals, 1932 - 1933
The aim was to provide a method of determining the lag of the receiving apparatus, requested by the Bureau International de l'Heure. Correspondents include the GPO and the Admiralty, from whom permission was sought to alter the signal, and the Synchronome Clock Company, for whom a contrivance capable of creating the dash at the prescribed times was ordered.
Correspondence on the purchase of two pieces of equipment for the time service, 1934 - 1936
Correspondence on the purchase of: (1) a thermostat to control the Clock Cellar temperature and (2) an electromagnetic relay (the Carpenter Relay) for switching. Includes sales brochures.
Ledger titled 'Lunar 6. Clock errors and clock rates', 1872
Ledger containing results of the observations made for the determination of clock errors, handwritten on printed forms titled 'Lunar Form No. 6'.
Lists and records of Royal Observatory clocks between the years 1894 and 1948, 1894 - 1948
Comprises: a list dated 25 Jun. 1894 of clocks that from 1874 had been recognised as property of the Royal Observatory (RO), giving the use and location of all these clocks; a record covering the years 1883 to 1901, of repairs and adjustments made to clocks within the RO, including those made to clocks temporarily located there for testing; a list of RO clocks, and how they were employed, compiled in Sept. 1901; a record of the known history of the Shelton Clock, compiled in 1948.
Time Department Chronometer ledger, 1900 - 1910
The content of this ledger is varied - as well as having information for the decade, for example circuit diagrams for the electrical connections to the Royal Observatory, it contains a few pages on the invention and development of the Chronometer. Most of the volume is blank.