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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Letter chasing an overdue order for a Distance Thermometer from Messrs. Negretti & Zambra.17th Sep 1923Box 40 \ 1  Scan051
Letter from Negretti & Zambra regarding the dispatch of a transmitter.18th Sep 1923Box 40 \ 1  Scan052
Certificate of Examination for Dial thermometer No. 1633, detailing scale reading corrections.4th Oct 1923Box 40 \ 1  Scan053
Request to check a Negretti & Zambra fahrenheit distance thermometer for inaccuracy.9th Oct 1923Box 40 \ 1  Scan054
Letter to Messrs. Negretti & Zambra regarding a faulty Fahrenheit thermometer, including test results showing inaccuracies.10th Oct 1923Box 40 \ 1  Scan055
The return of a distance thermometer to the manufacturer for repair.10th Oct 1923Box 40 \ 1  Scan056
Test results for a Negretti and Zambra Distance Thermometer.23th Oct 1923Box 40 \ 1  Scan057
Letter from Negretti & Zambra regarding a faulty transmitting thermometer returned for inspection.23th Oct 1923Box 40 \ 1  Scan058
Letter to Messrs. Negretti & Zambra following up on a Distance Thermometer sent for repair.22th Nov 1923Box 40 \ 1  Scan059
Letter from instrument makers Negretti & Zambra concerning the overhaul, testing, and potential trial of a Dial Thermometer.26th Nov 1923Box 40 \ 1  Scan060
Letter to Messrs. Negretti & Zambra Ltd. stating their previous correspondence from October and the previous month cannot be traced.1st Dec 1923Box 40 \ 1  Scan061
Letter from Negretti & Zambra enquiring about the status of a dial thermometer sent for trial.3rd Dec 1923Box 40 \ 1  Scan062
Arrangements and price for a sample distance thermometer supplied by Messrs. Negretti & Zambra.5th Dec 1923Box 40 \ 1  Scan063
Brief typed and handwritten note regarding particulars and pricing.12th Dec 1923Box 40 \ 1  Scan064
Trial of a Mercury filled Distance Thermometer from Negretti & Zambra.12th Dec 1923Box 40 \ 1  Scan065
Purchase of a sample thermometer and confirming its guarantee after repair.13th Dec 1923Box 40 \ 1  Scan066
Letter regarding the purchase of a large mercury-filled distance thermometer from Messrs. Negretti & Zambra.1st Jan 1924Box 40 \ 1  Scan067
Detailed report from Negretti & Zambra on a mercury-filled water temperature thermometer, noting its cost and accuracy.7th Jan 1924Box 40 \ 1  Scan068
Water temperature thermometer made for motor car engines.30th Oct 1922Box 40 \ 1  Scan069
Comparison report of an N. & Z. instrument against a Vapour pressure instrument across various performance tests.11th Oct 1926Box 40 \ 1  Scan070
Letter from instrument maker Negretti & Zambra regarding vapour pressure type instruments.12th Oct 1923Box 40 \ 1  Scan071
Repair and potential purchase of a dial thermometer from Negretti & Zambra.8th Jan 1924Box 40 \ 1  Scan072
Letter from Negretti & Zambra regarding the return and cost of a Dial Thermometer.7th Jan 1924Box 40 \ 1  Scan073
Requesting a test on a new, more cost-effective ether-filled thermometer from Negretti & Zambra.9th May 1924Box 40 \ 1  Scan074
Instructing to fit a thermometer supplied by Negretti and Zambra to a car going to France.27th May 1924Box 40 \ 1  Scan075
Return of an Acrometer disc valve to the makers, Negretti & Zambra, for repair.1st Sep 1924Box 40 \ 1  Scan076
Letter to Messrs. Negretti & Zambra regarding a faulty Acrometer Valve and special Gauge being returned for examination.8th Sep 1924Box 40 \ 1  Scan077
Letter from Negretti & Zambra acknowledging they will examine a non-return valve upon receipt.9th Sep 1924Box 40 \ 1  Scan078
Instructing the return of an Acrometer Disc Valve to Messrs. Negretti & Zambra for repair.15th Sep 1924Box 40 \ 1  Scan079
Returning an unsatisfactory Acrometer Valve and Special Gauge to Messrs. Negretti and Zambra for rectification.16th Sep 1924Box 40 \ 1  Scan080
Letter from Negretti & Zambra following up on the non-receipt of an Acrometer for examination.17th Sep 1924Box 40 \ 1  Scan081
Letter from Negretti & Zambra regarding the condition and reading discrepancies of a returned Acrometer valve.19th Sep 1924Box 40 \ 1  Scan082
Letter from Negretti & Zambra suggesting a modification to a pressure gauge for more accurate cylinder compression readings.19th Sep 1924Box 40 \ 1  Scan083
The despatch of two distance thermometers to Messrs. Negretti & Zambra for overhaul and repair.4th Jun 1925Box 40 \ 1  Scan084
Sending two faulty Distance Thermometers, purchased from Messrs. Negretti & Zambra, for overhaul.4th Jun 1925Box 40 \ 1  Scan085
Trial of two sets of tyres from the North British Rubber Company.24th Feb 1925Box 40 \ 1  Scan086
Letter of enquiry to Messrs. Negretti & Zambra regarding the purchase of two specific thermometers.29th Jan 1926Box 40 \ 1  Scan087
Follow-up letter to Messrs. Negretti & Zambra regarding a previous correspondence and the supply of instruments.17th Feb 1926Box 40 \ 1  Scan088
Letter from Negretti & Zambra regarding the supply, price, and delivery of Mercury-in-Steel Dial Thermometers.18th Feb 1926Box 40 \ 1  Scan089
Letter to Messrs. Negretti & Zambra declining a quotation for thermometers due to the expense.20th Feb 1926Box 40 \ 1  Scan090
Instructing Stores to return an oil pressure gauge to the makers, Dewrance & Co., for repair.28th Apr 1926Box 40 \ 1  Scan091
Requesting a Negretti & Zambra Thermometer be returned to the makers for repair.17th Aug 1926Box 40 \ 1  Scan092
Product list for transmitting oil pressure gauges by Negretti & Zambra.17th Aug 1926Box 40 \ 1  Scan093
The requirements for a portable lamp, its connection, and supply options.1st May 1919Box 40 \ 2  Scan001
Letter from Joseph Lucas Ltd regarding the supply and quotation for Inspection Lamp Plugs.3rd Jul 1919Box 40 \ 2  Scan002
Enquiry to supplier Messrs. Lucas about an inspection lamp for a chassis.22th Jul 1919Box 40 \ 2  Scan003
Cover memo for correspondence regarding the inspection lamp for the 40/50 chassis.7th Aug 1919Box 40 \ 2  Scan004
Supply of an inspection lamp plug for the 40/50 HP chassis.1st Aug 1919Box 40 \ 2  Scan005
Confirming a loose plug for the 40/50 HP Chassis inspection lamp will not be supplied.6th Aug 1919Box 40 \ 2  Scan006
Request for a suitable plug for an inspection lamp for the Lucas switchboard on chassis 1.EX.30th Oct 1919Box 40 \ 2  Scan007
The purchase of Inspection Lamp Plugs from Messrs. Lucas.24th Nov 1919Box 40 \ 2  Scan008
Recommendation to modify the inspection lamp plug socket with different diameter pins to prevent incorrect connection for external charging.9th Feb 1920Box 40 \ 2  Scan009
Letter from Lucas Electrical discussing a non-reversible 2-pin plug, an associated battery indicator, and a burnt fuse holder.18th Feb 1920Box 40 \ 2  Scan010
Car wiring connection sockets and the development of in-house dynamos and starter motors.5th Mar 1920Box 40 \ 2  Scan011
Request for the weight and ohmic resistances of competitor dynamos from Lucas and Smith.5th Mar 1920Box 40 \ 2  Scan012
Car wiring connection sockets and the development of in-house dynamos.5th Mar 1920Box 40 \ 2  Scan013
Request for weight and ohmic resistance data for Lucas and Smith dynamos for winding calculations.5th Mar 1920Box 40 \ 2  Scan014
Mr. Royce's request to modify the distribution board design to accommodate charging.11th Mar 1920Box 40 \ 2  Scan015
Introduction of a special non-reversible plug for the Lucas switch box for inspection lamps or external charging.11th Mar 1920Box 40 \ 2  Scan016
Supply of special plugs for the instrument board's Lucas switchboard.30th Mar 1920Box 40 \ 2  Scan017
Clarifying a previous communication regarding the Lucas switchbox plug for inspection lamps.31th Mar 1920Box 40 \ 2  Scan018
The wiring requirements for incorporating an inspection lamp plug socket.6th Aug 1920Box 40 \ 2  Scan019
Necessary wiring interconnections for a switchbox, incorporating a Smith dynamo and other components.10th Aug 1920Box 40 \ 2  Scan020
Letter to S. Smith & Sons requesting a switchbox modification for a polarised socket for an inspection lamp and battery charging.6th Aug 1920Box 40 \ 2  Scan021
Arguing against the use of a single distributing fuse due to the risk of multiple system failures.8th Aug 1920Box 40 \ 2  Scan022
Letter from S. Smith & Sons regarding the provision of a socket and plug for an inspection lamp on the switchboard.10th Aug 1920Box 40 \ 2  Scan023
Technical memo discussing a distribution board for wiring and the design of terminals.14th Aug 1920Box 40 \ 2  Scan024
Design of ignition locks and the layout of instrument board fittings for R.R. of America Inc.31th Aug 1920Box 40 \ 2  Scan025
Extract detailing design feedback on a lockable ignition switch.5th Nov 1920Box 40 \ 2  Scan026
Critical report on a Westinghouse switchbox from car 4-EX returned from America.17th Jun 1921Box 40 \ 2  Scan027
Letter discussing the control switch, inspection lamp socket, and instrument board lights for the 4-EX model.19th Aug 1921Box 40 \ 2  Scan028
Letter from Rolls-Royce of America regarding the standard practice and provision for fitting an inspection lamp.1st Sep 1921Box 40 \ 2  Scan029
Request to order three standard Lucas inspection lamps for the Experimental Department.20th Jul 1923Box 40 \ 2  Scan030
Letter from the Paris branch confirming the value of a Grebel spot-light.20th Mar 1928Box 40 \ 2  Scan031
Internal request to obtain a sample Lucas spot-light.6th Apr 1928Box 40 \ 2  Scan032
Procurement of two spotlights from Joseph Lucas Limited.20th Apr 1928Box 40 \ 2  Scan033
Letter concerning two Spot Lights obtained from Joseph Lucas Ltd.10th May 1928Box 40 \ 2  Scan034
Confirming the return of two C.A.V. Spot Lights to Stores for sending back to Lucas Ltd.1st May 1928Box 40 \ 2  Scan035
Information regarding the Grebel spot light for the 8-EX car, including agents and switching options.16th May 1928Box 40 \ 2  Scan036
Inquiry for particulars on a Grebel Spot Light fitted to car 8-EX.8th Jun 1928Box 40 \ 2  Scan037
Specifications and potential suppliers for a 'Stephen Grebel, Paris' spot light fitted to an 8-EX car.11th Jun 1928Box 40 \ 2  Scan038
The supply of lighting equipment for an experimental Barkerlite Coupe, India III.16th Jul 1928Box 40 \ 2  Scan039
The fitting of a Stephen Grebel spot light, a smaller headlamp, and Chrysler type wing lamps.16th Jul 1928Box 40 \ 2  Scan040
Arrangement, specifications, and wiring of lamps for the 12-G-4 vehicle model.17th Jul 1928Box 40 \ 2  Scan041
Request to supply a Stephen Greble Spot light and a Boa Constrictor Horn, with remaining features to be sent from Derby.19th Nov 1928Box 40 \ 2  Scan042
Faulty spotlight on car 18-EX, caused by an earthing issue, and its rectification.4th Jan 1929Box 40 \ 2  Scan043
Letter discussing proposals for a central dipped beam lamp and improvements to headlamp diffusion.10th Apr 1929Box 40 \ 2  Scan044
Letter discussing development and trials of light bulbs, switches, wing lamps, and screen wipers.10th Apr 1929Box 40 \ 2  Scan045
Letter responding to criticism and outlining the manufacturing programme for tail lamps and spot lights.10th Apr 1929Box 40 \ 2  Scan046
Letter to M.L. Magneto Works concerning the specification for a six-cylinder magneto for the 40/50 car.29th May 1924Box 40 \ 2  Scan047
Letter to suppliers altering the automatic advance specification for a 6-cylinder magneto for the 40/50 car.27th Aug 1924Box 40 \ 2  Scan048
Confirming a specification for magnetos is being reviewed by J. Lucas Ltd.1st Sep 1925Box 40 \ 2  Scan049
Letter from Joseph Lucas Ltd acknowledging an alteration to the specification of performance for 6-cylinder magnetos.1st Sep 1924Box 40 \ 2  Scan050
Letter to Lucas Electric Co. detailing alterations to the specification for a six-cylinder magneto.27th Oct 1924Box 40 \ 2  Scan051
Concluding page of a specification document, noting a potential alteration to the speed range.3rd Nov 1924Box 40 \ 2  Scan052
Letter from Joseph Lucas Ltd regarding a revised specification for a six-cylinder magneto.3rd Nov 1924Box 40 \ 2  Scan053
The suitability of a Lucas Magneto EB.6 print for testing.3rd Mar 1925Box 40 \ 2  Scan054
Secret memo from EFC to ROY regarding a magneto for an EAC.2 engine, forwarding notes and specifications from meetings with M.L. Co. and Lucas Elec. Co.29th May 1924Box 40 \ 2  Scan055
Forwarding a letter and print from Joseph Lucas Ltd. regarding magnetos for E.A.C.7th Oct 1925Box 40 \ 2  Scan056
Letter from Joseph Lucas Limited concerning the development and submission of a magneto for a 40/50 HP chassis.6th Oct 1925Box 40 \ 2  Scan057


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