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
List of required instruments for production testing and adjustment of lighting, starting, and ignition systems.10th Jan 1920Box 33 \ 4  Scan181
Request to order a portable D.C. volt ammeter for self-starter test tackle.27th Jan 1920Box 33 \ 4  Scan182
Letter from Weston Electrical Instrument Co. Ltd. concerning delays to orders for a Mil-Ammeter, Multiplier, and Testing Set.18th Feb 1920Box 33 \ 4  Scan183
Specifications and reading correction factors for box instruments 42 and 92.19th Feb 1920Box 33 \ 4  Scan184
Test and calibration data for Instrument 92, detailing voltage, amperage, resistance, and range correction values.19th Feb 1920Box 33 \ 4  Scan185
Page detailing deduction percentages for various volt and ampere range readings, with a note on instrument care.21th Feb 1920Box 33 \ 4  Scan186
Wiring diagram of connections for a Weston Box Instrument No. 92.21th Feb 1920Box 33 \ 4  Scan187
Note on the holving resistance ratio for Weston Instrument No. 92.22th Mar 1920Box 33 \ 4  Scan188
Confirming the receipt of a Mil-Ammeter model 370 from The Weston Electrical Instrument Co. Ltd.29th Mar 1920Box 33 \ 4  Scan189
Receipt of various parts from external suppliers.22th Apr 1920Box 33 \ 4  Scan190
Table of results for halving resistance with a new box on a 15-volt range.20th May 1920Box 33 \ 4  Scan191
Internal instruction sheet requesting a specific type of box instrument.12th Jun 1920Box 33 \ 4  Scan192
Request to order a Weston box type combined ammeter and voltmeter for the Experimental Department.14th Jun 1920Box 33 \ 4  Scan193
Letter from Weston Electrical Instrument Co., Ltd. about their Model 280 Garage Testing Set.9th Jun 1920Box 33 \ 4  Scan194
Order request for a Weston box type combined ammeter and voltmeter for the Experimental Department.3rd Aug 1920Box 33 \ 4  Scan195
Sending a Weston box type instrument for re-adjustment and chasing an overdue order for another.10th Aug 1920Box 33 \ 4  Scan196
Instruction sheet regarding the receipt of a boxed instrument with external shunts from the stores.20th Aug 1920Box 33 \ 4  Scan197
The return of a faulty Weston instrument for readjustment after a failed internal repair attempt.22th Sep 1920Box 33 \ 4  Scan198
Confirmation of receiving a repaired instrument from the Weston Instrument Co.8th Oct 1920Box 33 \ 4  Scan199
Specification sheet for an Electrical Experimental Department instrument, the Weston Standard Milli-Volt-Ammeter Model 1.1st Dec 1920Box 33 \ 4  Scan200
Specification table for a Weston Model 1 Milli-Volt-ammeter, detailing connections, ranges, and resistances.1st Dec 1920Box 33 \ 4  Scan201
Specification table for a Weston Milli-Volt-Ammeter, Model 1.1st Aug 1932Box 33 \ 4  Scan202
Specification table for a Weston Box Instrument Model 163, detailing its electrical properties and connections.1st Aug 1932Box 33 \ 4  Scan203
Specification table and wiring diagram for a Weston Box Instrument Model 163.1st Jan 1935Box 33 \ 4  Scan204
Specification table and wiring diagram for a Weston Box Instrument, Model 163.1st Jan 1935Box 33 \ 4  Scan205
Specification table and wiring diagram for a Weston Box Instrument, Model 163.28th Jan 1921Box 33 \ 4  Scan206
Instructions for determining the milli-volts and milli-amperes for a Weston Electrical R.P.M. Counter.28th Jan 1921Box 33 \ 4  Scan207
Instructions and measurements for a Weston Voltmeter.7th Dec 1921Box 33 \ 4  Scan208
Letter of inquiry to The Weston Electric Instrument Co. regarding a Model 375 Weston Galvanometer.1st Dec 1922Box 33 \ 4  Scan209
Copy of a letter from Weston Electrical Instrument Co. Ltd. regarding a model 375 Galvanometer and its price.2nd Dec 1922Box 33 \ 4  Scan210
Request to order a Weston Model 375 Galvanometer for insulation leakage tests.8th Dec 1922Box 33 \ 4  Scan211
The despatch of a Weston Ammeter to its makers for repair.18th Dec 1922Box 33 \ 4  Scan212
Specifications for a Weston Galvanometer Model 375, No. 8985.26th Oct 1923Box 33 \ 4  Scan213
The overhaul of a Weston milli-voltmeter and the addition of a new shunt.8th Jan 1924Box 33 \ 4  Scan214
Instructions for the re-calibration of a cell voltmeter.21th Feb 1924Box 33 \ 4  Scan215
Specifications for a Weston Galvanometer Model 375 and a Small Cell Testing Voltmeter.28th Apr 1924Box 33 \ 4  Scan216
Instruction sheet detailing the calculation for the resistance of a Weston Galvanometer.28th Apr 1924Box 33 \ 4  Scan217
Return of a Weston cell voltmeter to the makers for repair.15th Apr 1925Box 33 \ 4  Scan218
Sending a Weston Millivoltmeter to the makers for a new needle and overhaul.29th Apr 1925Box 33 \ 4  Scan219
Re-calibration of a Weston millivoltmeter and its associated volt box.30th Apr 1925Box 33 \ 4  Scan220
Return of a faulty Weston Cell Voltmeter to its makers due to a sticking needle.26th May 1925Box 33 \ 4  Scan221
Record of resistance measurements for various ampere shunts of a Weston Instrument.20th Jun 1925Box 33 \ 4  Scan222
Specification sheet for Weston Instrument No. 336.4th Jul 1925Box 33 \ 4  Scan223
Test report and specifications for a Bijur-Weston Instrument 23992.16th Oct 1925Box 33 \ 4  Scan224
Specifications for a Weston R.P.M. Indicator, instrument model 269, No. 336.22th Oct 1925Box 33 \ 4  Scan225
Electrical characteristics for a Weston R.P.M. Indicator, Instrument Model 267.5th Apr 1926Box 33 \ 4  Scan226
Requesting deflection temperature calibration for a whitemetal bearing and thermocouple arrangement.27th Sep 1926Box 33 \ 4  Scan227
Front cover of a brochure for the Weston Galvanometer, Model 375.1st Oct 1921Box 33 \ 4  Scan228
Product specification leaflet for the Weston Galvanometer, Model 375.7th Oct 1926Box 33 \ 4  Scan229
Order for a Weston Galvanometer Model 375.7th Oct 1926Box 33 \ 4  Scan230
Faulty Weston Box Instrument No.42 which is being returned for overhaul.14th Dec 1926Box 33 \ 4  Scan231
Description of the Cambridge Instrument Co's Recording Thermometer No. 27591.7th Feb 1927Box 33 \ 4  Scan232
Requesting repair and scale modification for a Weston voltmeter from revs per minute to milliamperes.16th Mar 1927Box 33 \ 4  Scan233
Test and calibration data for a Weston A.C. Milliammeter No. 1068.16th Mar 1927Box 33 \ 4  Scan234
Calibration data sheet for a Weston A.C. Milliammeter No. 1068.10th May 1927Box 33 \ 4  Scan235
Laboratory report on the calibration of a galvanometer and couple, showing temperature readings.10th May 1927Box 33 \ 4  Scan236
Requesting the return of a damaged Weston Cell Voltmeter to the makers for repair.1st Jun 1927Box 33 \ 4  Scan237
Calibration data for a Weston Galvanometer No.8985 Model No.375.22th Jun 1927Box 33 \ 4  Scan238
From Weston Electrical Instrument Co. regarding the repair of a Model 267 Voltmeter.27th Jun 1927Box 33 \ 4  Scan239
Calibration and resistance data for a Weston A.C. Milliammeter No. 1068.22th Sep 1927Box 33 \ 4  Scan240
Urgent internal request to obtain a Weston Galvanometer for experimental testing.30th Sep 1927Box 33 \ 4  Scan241
Faulty Weston milliammeter and its return for repair.7th Oct 1927Box 33 \ 4  Scan242
Specifications for two Weston Galvanometer Model 375 instruments.20th Oct 1927Box 33 \ 4  Scan243
The examination of a faulty Weston Dynamometer and suggestion for its repair.19th May 1928Box 33 \ 4  Scan244
Issues with a Weston Milli-voltmeter and its return for re-calibration.1st Jul 1929Box 33 \ 4  Scan245
Return of a Weston Milli-Voltmeter for re-calibration.2nd Jul 1929Box 33 \ 4  Scan246
Specification table for a Weston standard Milli-Volt-Ammeter, detailing its electrical properties and connections.13th Jun 1929Box 33 \ 4  Scan247
Arranging the return of a faulty Weston Galvanometer for repair.20th Jan 1931Box 33 \ 4  Scan248
Required overhaul and repair of a damaged Weston Box Instrument Model 163 No. 98.5th Nov 1932Box 33 \ 4  Scan249
Request to send a faulty Weston Instrument Model 163 No. 40 for overhaul and calibration.18th May 1933Box 33 \ 4  Scan250
Damaged Weston dynamometer instrument requiring overhaul and repair.28th Jun 1933Box 33 \ 4  Scan251
Running issues caused by wheel discs and proposing testing to find a solution.8th Apr 1930Box 33 \ 5  Scan001
Faulty Barker wheel discs which prevent the use of a wheel spanner.5th Jun 1930Box 33 \ 5  Scan002
Confirming corrective work on Barker wheel discs will be carried out free of cost.12th Jun 1930Box 33 \ 5  Scan003
Obtaining a set of wheel discs for Bensport & Peregrine models and sending a sample to Messrs Park Ward & Co.9th Jan 1933Box 33 \ 5  Scan004
Letter from the Air Department regarding the suitability testing of an electrical speed indicator outfit for aero engines.20th Jun 1915Box 33 \ 5  Scan005
Experiments with a magneto generator and Weston voltmeter for electrical speed indicators.24th Jun 1915Box 33 \ 5  Scan006
Continued memorandum discussing adjusting magneto voltage and diagnosing errors in generators or voltmeters.24th Jun 1919Box 33 \ 5  Scan007
Requesting the order of a Hasler Revolution Counter for the Experimental Department.17th Oct 1916Box 33 \ 5  Scan008
Extract detailing parts fitted to car 7 CA for Mr. Royce, with notes on rear springs, shock absorbers, and a speed indicator.15th Jun 1917Box 33 \ 5  Scan009
Requesting an update on the completion of parts for a Magneto Type Revolution Recorder for Capt. Briggs' car.29th Jul 1917Box 33 \ 5  Scan010
Quotation from The British Wright Company for four Ogilvie Air Speed Indicators.24th Oct 1917Box 33 \ 5  Scan011
Request for an additional Hasler revolution counter for the Experimental Department.15th Apr 1918Box 33 \ 5  Scan012
Suggestion for a new electrical speedometer design that also records mileage.8th Apr 1919Box 33 \ 5  Scan013
Outlining the advantages of a new electrical speedometer and rev counter instrument.16th Apr 1919Box 33 \ 5  Scan014
Proposal for an electrical speedometer that also registers miles travelled for the chassis.8th Apr 1919Box 33 \ 5  Scan015
Advantages of fitting a new electrical speedometer directly to the transmission.1st Apr 1919Box 33 \ 5  Scan016
Cover sheet regarding a suggestion for an electrical speedometer for the chassis.12th May 1919Box 33 \ 5  Scan017
Possibility of patenting an electrical mileage register and speed indicator.29th May 1919Box 33 \ 5  Scan018
Noting the requirement of a Hasler Speed Indicator for tests of the Starter Motor.21th Aug 1919Box 33 \ 5  Scan019
Inquiry about the availability of an electrical speed indicator (voltmeter) calibrated in Revolutions instead of Volts.16th Oct 1919Box 33 \ 5  Scan020
Requesting the urgent repair and return of a Hasler revolution counter.22th Oct 1919Box 33 \ 5  Scan021
Inquiry chasing a reply about the availability of a specially calibrated aero engine electrical speed indicator.29th Oct 1919Box 33 \ 5  Scan022
Advertisement for a dashboard-mounted manifold ignition indicator and plug tester.3rd Jun 1920Box 33 \ 5  Scan023
Request to obtain a new Hasler Revolution Counter for the Electrical Experimental Department.3rd Jun 1920Box 33 \ 5  Scan024
Sending a previous Hasler revolution counter to the makers for readjustment.16th Jun 1920Box 33 \ 5  Scan025
The return of a Hasler Revolution Counter for repair.8th Jun 1921Box 33 \ 5  Scan026
The return of a faulty Hasler speedometer to the manufacturer for repair.19th Aug 1921Box 33 \ 5  Scan027
Instructions for correcting readings from a Haslar Speed Indicator.31th Aug 1921Box 33 \ 5  Scan028
Requesting the repair of a Hasler revolution counter due to the needle sticking.14th Mar 1922Box 33 \ 5  Scan029


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