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 delayed standardization of the R.R. type regulator.23th Sep 1936Box 166 \ 2  img047
And handwritten response concerning the potential standardization of new Lucas voltage regulators (DB.880).19th Oct 1936Box 166 \ 2  img048
Letter from Joseph Lucas Ltd detailing the dispatch and specifications of six type LR7 Voltage Regulator Units.16th Nov 1936Box 166 \ 2  img049
Letter from Joseph Lucas Limited confirming the despatch of 'insensitive' and thermostatic control regulators for endurance testing.16th Nov 1936Box 166 \ 2  img050
The specifications for LR7 regulators mounted on RF.50 control boxes.16th Nov 1936Box 166 \ 2  img051
Specifications and connection details for Thermostatic Regulators LT.0884, LT.0885, and LT.0886 mounted on RF.50 Control Boxes.18th Nov 1936Box 166 \ 2  img052
The construction of a No.5 resistance element for a multi-stage regulator.18th Nov 1936Box 166 \ 2  img053
In response to a query, stating no immediate alterations are planned for carbon brushes.1st Dec 1936Box 166 \ 2  img054
Requesting the replacement of a burnt-out regulator and its resistance unit on car 30-EX.2nd Dec 1936Box 166 \ 2  img055
Standardization timeline for a new Lucas voltage regulator and delays in ordering existing ones.3rd Dec 1936Box 166 \ 2  img056
Intermittent fault with the regulator on car 36-EX, requesting its removal and replacement.8th Dec 1936Box 166 \ 2  img057
Covering note for a blueprint of modifications to a multi-stage voltage regulator for all chassis.8th Jan 1937Box 166 \ 2  img058
Unsatisfactory testing of Lucas voltage regulators.19th Jan 1937Box 166 \ 2  img059
The fitting, testing, and ordering of Lucas Voltage Regulators.15th Jan 1937Box 166 \ 2  img060
Parts list for modifications to an experimental multi-stage regulator.15th Feb 1937Box 166 \ 2  img061
List of parts and quantities required for a new coil assembly.15th Feb 1937Box 166 \ 2  img062
Letter from Joseph Lucas Limited regarding a report on Plug Gaps.19th Feb 1937Box 166 \ 2  img063
Letter to Joseph Lucas Ltd. enclosing a production specification for a C.A.V. Bosch Regulator, Type B2CJI.23th Feb 1937Box 166 \ 2  img064
Requesting to try out a new Lucas combined regulator and cut-out unit on a Wraith chassis.25th Feb 1937Box 166 \ 2  img065
Revised specification for production tests of a combined cut-out and regulator unit.5th Mar 1937Box 166 \ 2  img066
Production inspection, adjustment, and test specification for the cutout and regulator unit on Phantom III and Bentley models.5th Mar 1937Box 166 \ 2  img067
Test procedures for a dynamo and cutout, specifying voltage, amperage, and resistance limits.5th Mar 1937Box 166 \ 2  img068
Testing procedure for cutout contacts and specifications for a resistance unit and regulator.5th Mar 1937Box 166 \ 2  img069
Instructions for positioning and testing a regulator unit, including connection details for a test rig.5th Mar 1937Box 166 \ 2  img070
Testing procedure for a dynamo and voltage regulator, detailing outputs at different voltages and conditions.5th Mar 1937Box 166 \ 2  img071
Instructions regarding the acceptable swing of a needle at various speeds.5th Mar 1937Box 166 \ 2  img072
The return of three L.R.7 type regulators to Messrs Lucas for modification.5th Mar 1937Box 166 \ 2  img073
Letter to Joseph Lucas & Co. Ltd. regarding a revised specification for the B.2/CJ.1. type regulator.5th Mar 1937Box 166 \ 2  img074
The forwarding of three L.R.7 type Regulators to Messrs. Lucas for modification.6th Mar 1937Box 166 \ 2  img075
Urgent instruction memo to fit a Lucas LR7T voltage regulator to a car in the Repair Department.15th Mar 1937Box 166 \ 2  img076
Letter to Lucas Ltd. concerning issues with a type LR.7.T. regulator.23th Mar 1937Box 166 \ 2  img077
Letter from Joseph Lucas Limited discussing an LR7T Regulator's thermostatic compensation.1st Apr 1937Box 166 \ 2  img078
Letter from Joseph Lucas Limited regarding the performance and modification of LR7T regulators.1st Apr 1937Box 166 \ 2  img079
Technical memo on trialling the Lucas L.R.7.T. voltage regulator to replace the unreliable C.A.V. model.5th Apr 1937Box 166 \ 2  img080
Letter to Joseph Lucas Ltd. detailing observations and requirements for Lucas Regulators type LR.7.T.5th Apr 1937Box 166 \ 2  img081
Test results for output current and charging a fully-charged battery under various conditions.5th Apr 1937Box 166 \ 2  img082
Technical note discussing the compromise between low and high currents in a divided series winding for a battery.3rd May 1937Box 166 \ 2  img083
Request for performance tests on Lucas regulators and further observation of a single wire petrol gauge.3rd May 1937Box 166 \ 2  img084
Requesting the issue of a scheme for a heat resisting field resistance due to regulator resistance burn outs.10th May 1937Box 166 \ 2  img085
Recurring burn-outs of regulator resistance units in four specific cars.10th May 1937Box 166 \ 2  img086
Responding to reports of regulator resistance burn outs, discussing investigation and proposing modifications.10th May 1937Box 166 \ 2  img087
Investigation into recurring regulator resistance unit burn-outs.10th May 1937Box 166 \ 2  img088
Burnt-out regulator resistance from Mr. Player's car, chassis GLJ-58.11th May 1937Box 166 \ 2  img089
Request to arrange road tests for a new Lucas regulator on experimental Wraith and 33-EX cars.25th May 1937Box 166 \ 2  img090
Requesting a change of voltage regulator on chassis 32-EX for a 10,000-mile test.5th Jun 1937Box 166 \ 2  img091
Modification to prevent regulator resistance unit burn-outs on all chassis, including required parts lists.10th Jun 1937Box 166 \ 2  img092
Anticipating delays in obtaining a porcelain bobbin and suggesting a synthetic substitute for testing.10th Jun 1937Box 166 \ 2  img093
Specification discrepancies with Messrs Lucas regarding C.A.V. regulators.23th Jun 1937Box 166 \ 2  img094
Rejection of C.A.V. Regulators, Type DB.880, due to specification conflicts.22th Jun 1937Box 166 \ 2  img095
Letter from Joseph Lucas Limited concerning cutout setting and regulator value issues.25th Jun 1937Box 166 \ 2  img096
Letter from Joseph Lucas Limited regarding the performance and testing of an ignition coil and an LRT7 regulator.1st Jul 1937Box 166 \ 2  img097
List of drawing numbers, models, and item names for ignition coil components.29th Jun 1937Box 166 \ 2  img098
Instructing the return of a failed Lucas Regulator for examination and refitment to a Wraith Chassis.29th Jun 1937Box 166 \ 2  img099
Faulty Lucas regulator being returned for examination after failing a bench test.30th Jun 1937Box 166 \ 2  img100
Letter regarding a hand-made sample of a proposed Double Tier Voltage Regulator and Junction Box sent for testing.16th Jul 1937Box 166 \ 2  img101
Letter to Joseph Lucas Ltd. acknowledging an experimental drawing for a voltage regulator and advising the sample has not yet been received.2nd Aug 1937Box 166 \ 2  img102
Requesting a drawing for a steel spring hinge to be made based on a bimetal sample.11th Aug 1937Box 166 \ 2  img103
Building the experimental Wraith III chassis with a C.A.V. regulator as the LR.7 regulator is not sufficiently developed.13th Aug 1937Box 166 \ 2  img104
Request for two different Spring Hinge parts for experimental work on the Lucas LR.7 Regulator.18th Aug 1937Box 166 \ 2  img105
Letter to a supplier regarding an issue with uncovered Brightray wire shorting in a resistance unit.26th Aug 1937Box 166 \ 2  img106
Blueprint distribution note for a modification to the Wraith III Cutout and Regulator LOP.31th Aug 1937Box 166 \ 2  img107
Specification for the inspection, adjustment, and testing of a cutout and regulator.28th Oct 1937Box 166 \ 2  img108
Testing procedure for a regulator's resistance unit and electrical performance.28th Oct 1937Box 166 \ 2  img109
Letter from Joseph Lucas Ltd. regarding the supply and specification of LR7 and LRT7 regulators.21th Sep 1937Box 166 \ 2  img110
Laboratory advice note detailing the settings for two LR7 Regulators.17th Sep 1937Box 166 \ 2  img111
The receipt and testing of two LR7 Regulators against the standard C.A.V. - Bosch B2.CJ-1 regulator.21th Sep 1937Box 166 \ 2  img112
Specifications and settings for LR7 regulators mounted on RF50 boxes, referencing the B2CJ-1 regulator.23th Sep 1937Box 166 \ 2  img113
Letter to Joseph Lucas Ltd. concerning the testing of horns and regulators.23th Sep 1937Box 166 \ 2  img114
Letter from Joseph Lucas Limited regarding the dispatch and technical specifications of a new LR7 Regulator.30th Sep 1937Box 166 \ 2  img115
Letter from Joseph Lucas Limited regarding the supply of LRT7 Regulators for testing purposes.1st Oct 1937Box 166 \ 2  img116
Laboratory advice note detailing the output figures for LRT7 Regulators under various conditions.30th Sep 1937Box 166 \ 2  img117
Request to order and test 'Glowray' resistance wire for a regulator unit, as the oxidised wire proved unsatisfactory.8th Oct 1937Box 166 \ 2  img118
Recommendation on the winding method for a C.A.V. Bosch Regulator Resistance Unit, concluding that it should be wound inductively to avoid extra cost.23th Oct 1937Box 166 \ 2  img119
Blueprints and required parts for the Wraith Cutout and Regulator Unit.26th Oct 1937Box 166 \ 2  img120
Alteration to the Wraith III Regulator & Resistance Unit.28th Oct 1937Box 166 \ 2  img121
Letter to Joseph Lucas Ltd. detailing the results of bench tests on LR.7 and LRT.7 type regulators.27th Oct 1937Box 166 \ 2  img122
Electrical current tests under hot conditions for various units and regulators.27th Oct 1937Box 166 \ 2  img123
The performance of regulators and cutouts, detailing test results and proposed modifications.27th Oct 1937Box 166 \ 2  img124
Suggestions for adjusting a regulator's winding turns and output amperage.25th Oct 1937Box 166 \ 2  img125
Experimental department report on Lucas Regulator & Cutout Units, concluding they are unsuitable for standardisation.25th Oct 1937Box 166 \ 2  img126
The investigation and testing of a Lucas Dynamo Regulator and Cutout unit.28th Oct 1937Box 166 \ 2  img127
Single-stage voltage regulator, discussing its design, fuse issues, and temperature characteristics.28th Oct 1937Box 166 \ 2  img128
Output current measurements at 13.0 Volts, comparing performance with and without a temperature compensating device under cold and hot conditions.28th Oct 1937Box 166 \ 2  img129
Performance, reliability, and lifespan of regulators, including output current measurements under cold and hot conditions.28th Oct 1937Box 166 \ 2  img130
The performance issues of a voltage cutout and regulator, with a summary and recommendations.28th Oct 1937Box 166 \ 2  img131
Action plans for the development of regulators and cutouts.28th Oct 1937Box 166 \ 2  img132
Test report on the fuse in the resistance unit circuit of a C.A.V. regulator, detailing failure modes and proposed improvements.18th Nov 1937Box 166 \ 2  img133
Letter to Joseph Lucas Ltd. detailing investigations into regulator and dynamo performance.26th Nov 1937Box 166 \ 2  img134
Test results for a regulator, detailing resistance values and output currents under various conditions.26th Nov 1937Box 166 \ 2  img135
Test report on output current measurements under various conditions, including cold, hot, and battery load scenarios.26th Nov 1937Box 166 \ 2  img136
Letter regarding the return of regulators and plans for further experiments on a compensated unit.26th Nov 1937Box 166 \ 2  img137
Request to arrange the return of several Lucas regulators to their makers after testing.29th Nov 1937Box 166 \ 2  img138
Requesting the forwarding of several Lucas Regulators to Messrs Lucas after completion of tests.1st Dec 1937Box 166 \ 2  img139
Request for instructions to fit a steel spring onto a Lucas regulator armature, replacing the existing bi-metal spring.7th Dec 1937Box 166 \ 2  img140
Letter to Lucas Ltd. concerning the specifications and supply of special electrical regulators.16th Dec 1937Box 166 \ 2  img141
Letter from Joseph Lucas Limited detailing the specifications of three voltage regulators sent for testing.31th Dec 1937Box 166 \ 2  img142
Visit to the offices and laboratory of Messrs. Lucas to discuss regulators and ammeters.4th Jan 1938Box 166 \ 2  img143
Confirming the receipt of three specially adjusted Lucas dynamo voltage regulators to address battery under-charging.9th May 1940Box 166 \ 2  img144
Testing a modified Lucas LR.7 type regulator to reduce the effect of temperature on its output characteristic.10th Jan 1938Box 166 \ 2  img145
Next steps for road testing regulators, specifically the placement of resistance units considering heat production.7th Jan 1938Box 166 \ 2  img146


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