Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
The lubricating properties and performance of paraffin base hydrocarbons in petrol engines.5th Oct 1928Box 32 \ 4  Scan275
Page from 'The ELECTRICAL REVIEW' detailing tests for high-grade insulating oils.5th Oct 1928Box 32 \ 4  Scan276
Journal page detailing various testing procedures for oils and an article on international salesmanship.5th Oct 1928Box 32 \ 4  Scan277
Request for a comparative analysis of two used engine oil samples, one from a standard S.S. engine and the other from a Chrysler.6th Apr 1929Box 32 \ 4  Scan278
Request from Messrs. Duckham for the approval of their 'ADCOL' New Process Oil.27th Apr 1929Box 32 \ 4  Scan279
Use of Vacuum BB oil as an alternative, as no tests have been conducted on Vacuum A oil.29th Apr 1929Box 32 \ 4  Scan280
Stating no objection to the use of Duckham's oil.27th Nov 1929Box 32 \ 4  Scan281
Composition and use of 'Esso' super-fuel in cars.18th Jul 1930Box 32 \ 4  Scan282
Internal memorandum regarding 'Esso' and Rolls-Royce Cars, advising to say nothing on the matter.23th Jun 1930Box 32 \ 4  Scan283
Customer's query about using Valrolene oil for the engine of chassis 62-RC.2nd Feb 1931Box 32 \ 4  Scan284
Suitability of Valrolene oil for chassis No. 62-RC.9th Feb 1931Box 32 \ 4  Scan285
Clarifying that Messrs. Duckham has no authority to state their oils are approved, but their H.B.B. grease is approved.24th Jun 1931Box 32 \ 4  Scan286
Laboratory report on a sample of 'ESSO' Motor Spirit.22th Sep 1931Box 32 \ 4  Scan287
Laboratory report detailing the results of a distillation test on a sample of 'Esso' (French) motor spirit.3rd Oct 1931Box 32 \ 4  Scan288
Reprint from The Electrical Times discussing developments in mercury vapour rectifiers.9th Jun 1921Box 32 \ 5  Scan001
Reprint from 'The Electrical Times' discussing recent developments in mercury vapour rectifiers.9th Jun 1921Box 32 \ 5  Scan002
Suitable rectifiers for trickle charging chassis batteries.27th Oct 1922Box 32 \ 5  Scan003
Different types of rectifiers for chassis batteries, recommending the B.T.H. Tungar rectifier.31th Oct 1922Box 32 \ 5  Scan004
Attached leaflet for a Tungar rectifier for battery charging.8th Nov 1922Box 32 \ 5  Scan005
Leaflet for the Tungar Battery Charger and an associated Charging Board for direct current use.2nd Nov 1922Box 32 \ 5  Scan006
Letter from the Hewettic Electric Company regarding their new, larger capacity Mercury Vapour Rectifiers.21th Sep 1921Box 32 \ 5  Scan007
Product sheet for a Hewittic Electric Company Limited Mercury Vapour Rectifier.21th Sep 1921Box 32 \ 5  Scan008
Product data sheet for a Mercury Vapour Rectifier from the Hewittic Electric Company Limited.22th Nov 1922Box 32 \ 5  Scan009
Comparison of efficiencies between B.T.H. Tungar and Johnson & Phillips relay operated rectifiers.22th Nov 1922Box 32 \ 5  Scan010
Requesting an enquiry be sent to Johnson & Phillips Ltd. for a relay-operated rectifier for charging chassis batteries.22th Nov 1922Box 32 \ 5  Scan011
Inquiry to Johnson & Phillips Ltd. for particulars of a Relay Operated Rectifier for charging chassis batteries.24th Nov 1922Box 32 \ 5  Scan012
Quotation from Johnson & Phillips Ltd for a J.& P. Full wave converter and battery charger.28th Nov 1922Box 32 \ 5  Scan013
Particulars of a Johnson & Phillips rectifier for charging 12-volt batteries and comparing it to a B.T.H. Tungar rectifier.29th Nov 1922Box 32 \ 5  Scan014
Cover page for the J. & P. A.C. to D.C. (full wave) converter.1st Oct 1922Box 32 \ 5  Scan015
Important notice detailing the particulars required when ordering J. & P. Converters.7th Dec 1922Box 32 \ 5  Scan016
Letter responding to an enquiry about Tungar Battery Chargers, with an accompanying descriptive folder.7th Dec 1922Box 32 \ 5  Scan017
Sending a Johnson & Phillips Rectifier to the makers for repair.3rd Jun 1925Box 32 \ 5  Scan018
Testing and recommendation of a Philips Rectifier for charging chassis batteries.16th Nov 1925Box 32 \ 5  Scan019
Testing and performance of a Philips Rectifier.9th Nov 1925Box 32 \ 5  Scan020
Continuation of a report detailing results and observations from electrical charging tests on a valve.24th Dec 1925Box 32 \ 5  Scan021
Price confirmation for a Johnson & Philips full wave converter.24th Dec 1925Box 32 \ 5  Scan022
Circuit diagram illustrating the connections for a Fellows A.C. Rectifier.5th Dec 1929Box 32 \ 5  Scan023
Car dynamo output and alternative battery charging technologies.5th Dec 1929Box 32 \ 5  Scan024
Standard armatures and trickle charging arrangements for car dynamos.16th Dec 1929Box 32 \ 5  Scan025
Metal rectifiers suitable for charging chassis batteries from an alternating current supply.16th Dec 1929Box 32 \ 5  Scan026
Trickle charging, efficiency, and comparative costs of metallic rectifying units versus Tungar type units.16th Dec 1929Box 32 \ 5  Scan027
Dynamo output, increased electrical load from features, and battery charging methods.23th Dec 1929Box 32 \ 5  Scan028
Quotation for a Westinghouse rectifier set for car batteries.30th Jan 1930Box 32 \ 5  Scan029
Proposal for a rectifier set in the garage with a security measure to prevent unofficial use.1st Feb 1930Box 32 \ 5  Scan030
Letter inquiring about making a quoted metal rectifier set portable for charging batteries.24th Apr 1930Box 32 \ 5  Scan031
Letter from Westinghouse regarding the specifications and arrangement of an R.P.10.F rectifier for floor mounting and battery charging.28th Apr 1930Box 32 \ 5  Scan032
Letter to Westinghouse Brake & Saxby Signal Co. Ltd requesting weight and dimension particulars for an RP.10F rectifier apparatus.30th Apr 1930Box 32 \ 5  Scan033
Letter from Westinghouse regarding the supply and arrangement of an R.P.10.F. rectifier, including a blueprint.1st May 1930Box 32 \ 5  Scan034
Request to obtain a Westinghouse Metal Rectifier Set for charging car batteries in the experimental garage.6th May 1930Box 32 \ 5  Scan035
Continuation discussing an electrical apparatus for converting current and ordering information from Westinghouse Co.6th May 1930Box 32 \ 5  Scan036
Metal rectifier equipment for electro-plating purposes.6th May 1930Box 32 \ 5  Scan037
Letter from Westinghouse Brake & Saxby Signal Company enclosing a blueprint of instructions for a rectifier set.7th Jul 1930Box 32 \ 5  Scan038
Instructions for use for an RP. 10 - F. Rectifier Set manufactured by The Westinghouse Brake and Saxby Signal Co Ltd.8th Aug 1930Box 32 \ 5  Scan039
From EFC to EJJ regarding the omission of the metal rectifier apparatus.8th Aug 1930Box 32 \ 5  Scan040
Return of a U3 Osram rectifying valve to the General Electric Co. Ltd. for examination.9th Apr 1932Box 32 \ 5  Scan041
Letter to the General Electric Co. Ltd. regarding a faulty H.T. Rectifying Valve being returned for examination.9th Apr 1932Box 32 \ 5  Scan042
Letter to Westinghouse Brake & Saxby Signal Co. Ltd. declining to fit the Westric Charger socket as standard equipment.4th May 1933Box 32 \ 5  Scan043
Modifications to drawing LeC.2121 for the EAC battery ignition system, including feedback from Mr. Royce.10th Aug 1925Box 32 \ 5  Scan044
Investigations into improving the life of ignition contact points for the Phantom car.29th May 1928Box 32 \ 5  Scan045
From EFC to RHC requesting two battery ignition contact breaker springs with a larger set.26th Oct 1926Box 32 \ 5  Scan046
Required modifications to the ignition systems of various experimental chassis.9th Nov 1926Box 32 \ 5  Scan047
Change in material and force requirements for springs in a battery ignition contact breaker.23th Dec 1926Box 32 \ 5  Scan048
Requesting contact breaker springs to continue a 10,000-mile contact breaker run test.10th Jan 1927Box 32 \ 5  Scan049
Dispatch of special contact breaker springs.13th Jan 1927Box 32 \ 5  Scan050
Extract discussing modifications to a Bosch ignition unit with a diagram of an umbrella-style rotor designed for air circulation.17th Jan 1927Box 32 \ 5  Scan051
Modification to the battery ignition umbrella rotor to improve insulation.26th Feb 1927Box 32 \ 5  Scan052
Modifications to the ignition system on experimental chassis, including adding holes to distributors.1st Mar 1927Box 32 \ 5  Scan053
Anxiously awaiting a satisfactory set of stronger springs for a battery ignition contact breaker.2nd Mar 1927Box 32 \ 5  Scan054
New and replacement parts for the ignition distributor on Phantom and EAC.VII models.8th Mar 1927Box 32 \ 5  Scan055
Cover note for a blueprint showing the radial movement of an offset contact breaker rocker for battery ignition.22th Mar 1927Box 32 \ 5  Scan056
Graph showing make ratio versus speed curves for a standard contact breaker with standard and increased rated springs at various gaps.31th Mar 1937Box 32 \ 5  Scan057
Blank document page bearing a Print Room stamp from Derby.31th Mar 1927Box 32 \ 5  Scan058
Burning ignition contact points on vehicle 10-EX due to oil presence and the proposed solution.8th Jun 1927Box 32 \ 5  Scan059
Request from EFC to HHC for two further mushroom type rotors for battery ignition tests.5th Jul 1927Box 32 \ 5  Scan060
Cases of surface tracking failure on moulded battery ignition rotor bodies.23th Aug 1927Box 32 \ 5  Scan061
Failure of bakelite distributor heads and the effectiveness of a safety gap.23th Aug 1927Box 32 \ 5  Scan062
Test report on a new experimental mushroom type H.T. rotor, comparing its performance on open circuit to the standard type.22th Oct 1927Box 32 \ 5  Scan063
Distributor head sparking and corrosion, comparing the standard rotor to a 'mushroom' rotor and suggesting a redesign with vanes.22th Oct 1927Box 32 \ 5  Scan064
Standardisation and performance of a mushroom type H.T. rotor, noting issues with corrosion.2nd Nov 1927Box 32 \ 5  Scan065
Standardising battery ignition components and a potential tracking issue in the distributor.8th Nov 1927Box 32 \ 5  Scan066
Reliability and potential redesign of the battery ignition distributor head and rotor.14th Nov 1927Box 32 \ 5  Scan067
10,000-mile test of a mushroom-type H.T. rotor and proposing the addition of vanes to prevent corrosion.6th Dec 1927Box 32 \ 5  Scan068
Supplying two modified mushroom type rotors and requesting fingers to be fitted for specific test cars.6th Dec 1927Box 32 \ 5  Scan069
Requesting new keyways be slotted in two mushroom type rotors to suit a standard contact breaker.12th Dec 1927Box 32 \ 5  Scan070
New sample springs for Make and Break Levers, piece no. D.50793, focusing on material and avoiding plating.13th Oct 1927Box 32 \ 5  Scan071
Improvements to battery ignition, plugs, and distributor components, and a query on porcelain plug manufacturing.28th Nov 1927Box 32 \ 5  Scan072
Decision memo on not adding vanes to the umbrella rotor for the battery ignition system.8th Dec 1927Box 32 \ 5  Scan073
Design and improvement of battery ignition systems, including contacts, distributors, and coils.9th Dec 1927Box 32 \ 5  Scan074
Provision of mushroom type rotors with altered keyways for chassis testing.20th Dec 1927Box 32 \ 5  Scan075
Requesting a modification to fit a mushroom type rotor to a 12-EX car.2nd Mar 1928Box 32 \ 5  Scan076
Instructions and examination results for a new standard contact breaker design.27th Jul 1928Box 32 \ 5  Scan077
Misfiring issue on vehicle 9-EX at low speeds, attributing it to the contact breaker and tungsten points, and requesting a new part to be fitted.13th Sep 1928Box 32 \ 5  Scan078
Changing the finish on a battery ignition contact breaker's fixed point screw from black oxidised to electro-tinned to improve electrical reliability.22th Sep 1928Box 32 \ 5  Scan079
Factors affecting the ignition lever position on Phantom and 20 HP models.25th Oct 1928Box 32 \ 5  Scan080
Continued instructions for checking ignition system quantities and timings for 20 HP and Phantom chassis.25th Oct 1928Box 32 \ 5  Scan081
Technical note on diagnosing ignition timing faults related to the contact breaker and quadrant position.2nd Nov 1928Box 32 \ 5  Scan082
Test report on stainless steel contact points for battery ignition.2nd Nov 1928Box 32 \ 5  Scan083
The testing of nickel silver contact breaker levers fitted with tungsten points.2nd Nov 1928Box 32 \ 5  Scan084
Test report on Nickel Silver contact breaker levers after a 10,000-mile equivalent bench test.2nd Nov 1928Box 32 \ 5  Scan085
The material improvement of battery ignition contact breaker cams hardened by the 'Cloudburst' process.15th Sep 1930Box 32 \ 5  Scan086


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