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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Correct fusing value for a regulator resistance unit.14th Jan 1938Box 166 \ 2  img147
Instruction to test a Lucas LR.7 Regulator & Cutout Unit and modify the cover with ventilating holes for the Bentley III.14th Jan 1938Box 166 \ 2  img148
Letter to Joseph Lucas Ltd. regarding the testing and specifications of an LR7 regulator, model LT.1427.18th Jan 1938Box 166 \ 2  img149
Letter to J. Lucas Co. Ltd. regarding the standardisation of regulator units for testing.18th Jan 1938Box 166 \ 2  img150
Request for a modification to a base plate to mount a Lucas regulator on a Bentley III.19th Jan 1938Box 166 \ 2  img151
Letter from Joseph Lucas Limited regarding the production of LR.7 Voltage Regulators and control boxes.22th Jan 1938Box 166 \ 2  img152
Requesting the dispatch of a Bentley Ill Regulator Unit to Messrs. Lucas for modification.25th Jan 1938Box 166 \ 2  img153
Letter to Joseph Lucas Ltd. regarding the supply and specific wiring of an LR7 regulator.26th Jan 1938Box 166 \ 2  img154
Inquiry to J. Stone & Co. Ltd. regarding the availability and price of dynamo voltage regulators for cars.27th Jan 1938Box 166 \ 2  img155
Letter to Joseph Lucas Ltd. detailing disappointing bench test results for three C.A.V. regulators.27th Jan 1938Box 166 \ 2  img156
Proposal to alter test specifications for higher output, comparing current and suggested amperage ranges at set voltages.27th Jan 1938Box 166 \ 2  img157
Letter concerning the Control Box unit for three experimental Bentley models, discussing regulators, resistance placement, and wiring.28th Jan 1938Box 166 \ 2  img158
Letter from Joseph Lucas Limited regarding the necessity and placement of a dynamo field fuse.28th Jan 1938Box 166 \ 2  img159
The bench testing and modification of a regulator-cutout unit for scheme DCD.71.1st Feb 1938Box 166 \ 2  img160
Note suggesting a regulator was wrongly blamed for an issue caused by blowing dynamo fuses.3rd Feb 1938Box 166 \ 2  img161
Examination and test report on a faulty C.A.V. regulator from chassis 3.BU.138.3rd Feb 1938Box 166 \ 2  img162
Continuation page of a document discussing supplied armature fuses.3rd Feb 1938Box 166 \ 2  img163
Customer complaint about a flat battery and non-charging dynamo, traced to the voltage regulator on a Phantom III.3rd Feb 1938Box 166 \ 2  img164
Requesting the removal of a regulator from car 35.EX for testing and replacement.4th Feb 1938Box 166 \ 2  img165
Two outstanding invoices from Joseph Lucas Ltd. for five voltage regulators.4th Feb 1938Box 166 \ 2  img166
New specification, supply issues, and fitting recommendations for a high output regulator.5th Feb 1938Box 166 \ 2  img167
Request for the production of three modified sub-bases for mounting Lucas regulators on Bentley III cars.9th Feb 1938Box 166 \ 2  img168
Summary of a visit to Messrs Lucas to investigate and discuss dynamo regulator troubles and specifications.11th Feb 1938Box 166 \ 2  img169
Modifications and specifications for Lucas regulators and control units.11th Feb 1938Box 166 \ 2  img170
Two C.A.V. type regulators with higher output characteristics received from Messrs. Lucas.14th Feb 1938Box 166 \ 2  img171
Requesting the replacement of a Lucas regulator unit with a standard R.R. unit, noting it will require slight alterations.14th Feb 1938Box 166 \ 2  img172
Requesting the fitting of two experimental higher output C.A.V. regulators onto test cars.15th Feb 1938Box 166 \ 2  img173
Comparing the characteristics of two C.A.V. regulators, a standard unit and a new higher output model.16th Feb 1938Box 166 \ 2  img174
Fitting of experimental C.A.V. regulators with a higher setting to two cars.17th Feb 1938Box 166 \ 2  img175
Parts request for a Bentley III Regulator and Cutout Unit to be sent to Messrs. Lucas.17th Feb 1938Box 166 \ 2  img176
C.A.V. regulators and the problem of battery sulphating.22th Feb 1938Box 166 \ 2  img177
C.A.V. regulators and complaints of battery sulphating.22th Feb 1938Box 166 \ 2  img178
List of parts for Bentley III Regulators and Cut-Outs to be sent to Messrs Lucas.24th Feb 1938Box 166 \ 2  img179
Invoices from Messrs. Joseph Lucas Limited for 5 Regulators, requesting payment clearance.24th Feb 1938Box 166 \ 2  img180
Order for B.2.CJ1A Voltage Regulators set to a specific high voltage.24th Feb 1938Box 166 \ 2  img181
The parts list for Bentley III Regulators & Cut-out to be ordered from Messrs Lucas.2nd Mar 1938Box 166 \ 2  img182
Improvements to dynamo output regulators and a switch from 60 to 48 watt bulbs.3rd Mar 1938Box 166 \ 2  img183
Returning 60 Watt bulbs for replacement in relation to dynamo output regulators.4th Mar 1938Box 166 \ 2  img184
Internal request to order 12 Voltage Regulators from Messrs. Joseph Lucas Ltd. for testing purposes.5th Mar 1938Box 166 \ 2  img185
Letter from J. Stone & Company to discuss the suitability of an H. type regulator and arrange a meeting.7th Feb 1938Box 166 \ 2  img187
Letter to J. Stone & Co. Ltd. discussing the feasibility and cost of fitting their type H regulator to company cars.7th Mar 1938Box 166 \ 2  img188
Letter from J. Stone & Company regarding the decision not to use their Carbon Pile Regulators.8th Mar 1938Box 166 \ 2  img189
Advice note from Joseph Lucas Limited for an experimental LR7 regulator on a Rolls Royce base.11th Mar 1938Box 166 \ 2  img190
Advice note from Joseph Lucas Limited regarding the dispatch of an L.R.7 Regulator.11th Mar 1938Box 166 \ 2  img191
The supply of special regulators for the Phantom III to fix battery charging issues.18th Mar 1938Box 166 \ 2  img192
The fitting of a new R.R. type Lucas regulator for a Bentley III chassis.18th Mar 1938Box 166 \ 2  img193
Letter to Messrs. Lucas Ltd. regarding the fitting and return of an LR.7 regulator.22th Mar 1928Box 166 \ 2  img194
Instructions for modifying a Lucas LR.7 type regulator, involving replacing an obsolete unit.23th Mar 1938Box 166 \ 2  img195
Obsolete Bentley III Lucas L.R.7 Regulator Unit.24th Mar 1938Box 166 \ 2  img196
Fitting of a new Lucas LR.7 regulator to Bentley car B.56.BN.8th Apr 1938Box 166 \ 2  img197
Letter to Messrs. Joseph Lucas Ltd. reporting a failure of an LR.7 regulator unit during testing.14th Apr 1938Box 166 \ 2  img198
Failure of an experimental Lucas R.R. Type Regulator during bench tests.14th Apr 1938Box 166 \ 2  img199
Requesting a faulty Lucas R.R. type Regulator be forwarded for repair.20th Apr 1938Box 166 \ 2  img200
Letter from Joseph Lucas Ltd. to Rolls-Royce concerning a report of a faulty LR.7 Regulator unit and confirming its non-receipt.22th Apr 1938Box 166 \ 2  img201
Letter to Messrs. Lucas Ltd. regarding a regulator that was despatched without being addressed to the correct person.26th Apr 1938Box 166 \ 2  img202
The return of a Lucas regulator for B.50 to the makers for examination.2nd May 1938Box 166 \ 2  img203
Letter to Messrs. Lucas Ltd. regarding the return of a special regulator unit following a phone conversation.2nd May 1938Box 166 \ 2  img204
Letter from Joseph Lucas Ltd regarding the misdirection and subsequent investigation of a returned Regulator and Cutout unit.6th May 1938Box 166 \ 2  img205
Parts list for Bentley III Regulators to be ordered from Messrs Lucas.6th Jul 1938Box 166 \ 2  img206
Test report on a dynamo and regulator for car 35.EX.11th Jul 1938Box 166 \ 2  img207
Test results of battery charging current after a run and subsequent examination of the dynamo commutator.11th Jul 1938Box 166 \ 2  img208
Requesting the replacement of a burnt-out series coil on chassis 7.B.V.13th Jul 1938Box 166 \ 2  img209
Requesting the removal and refitting of a Lucas regulator on car B.56.BN.19th Jul 1938Box 166 \ 2  img210
Requesting the replacement of a faulty experimental C.A.V. regulator on car 35-EX.19th Jul 1938Box 166 \ 2  img211
The performance characteristics and agreed settings for a C.A.V. Type Regulator with 2 1/4 turns.19th Aug 1938Box 166 \ 2  img212
Specification for C.A.V. Type Regulator B.2.CS/11 for Chassis Dynamos, outlining electrical performance tests.23th Apr 1937Box 166 \ 2  img213
Page detailing a test procedure concerning amperes and regulator adjustment.1st Sep 1938Box 166 \ 2  img214
The replacement of an overheated and damaged Lucas R.R. type regulator cutout unit on car 8.B.V.1st Sep 1938Box 166 \ 2  img215
Comparing output figures for voltage regulators from a supplier and internal drawings, highlighting discrepancies and requesting further testing.6th Sep 1938Box 166 \ 2  img216
New Cutout and Regulator Unit for Bentley III and Bentley 50 models, replacing a previous mock-up.7th Sep 1938Box 166 \ 2  img217
Instruction memo regarding sending covers to Messrs. Lucas for regulator protection.20th Sep 1938Box 166 \ 2  img218
Damaged and overheated Lucas type regulator cutout unit removed from car 8.B.V.20th Sep 1938Box 166 \ 2  img219
Incorrect resistance value in the regulator resistance unit for a Wraith.5th Oct 1938Box 166 \ 2  img220
Request to forward a speedometer and bulbs to Mr. I.M. Waller in France for testing.26th Oct 1938Box 166 \ 2  img221
Letter requesting further information to diagnose a faulty regulator causing a battery to overcharge.26th Oct 1938Box 166 \ 2  img222
Communication regarding the dispatch of a speedometer suitable for a 9/37 back axle ratio.26th Oct 1938Box 166 \ 2  img223
Issues with H.T. wire, distributor components, and proposed solutions.31th Oct 1938Box 166 \ 2  img224
Swamping ratios and operating voltages for Lucas L.R.7. Regulators.6th Dec 1938Box 166 \ 2  img225
Letter to Joseph Lucas Ltd. concerning a discrepancy in a regulator's swamp to coil resistance ratio.9th Dec 1938Box 166 \ 2  img226
Page 2 of a letter to J. Lucas Ltd., disclaiming responsibility for delays or issues arising from insufficient information from the maker.9th Dec 1938Box 166 \ 2  img227
Letter to Joseph Lucas Ltd. arranging a visit to discuss outstanding points on the Lucas RR1 type regulator.15th Dec 1938Box 166 \ 2  img228
Letter from Joseph Lucas Ltd. arranging a visit to discuss voltage regulator settings.16th Dec 1938Box 166 \ 2  img229
Letter discussing the procedure for checking a new regulator type RR1 used with a 5' dynamo.21th Dec 1938Box 166 \ 2  img230
Procedures and results for dynamo and regulator testing at various speeds.21th Dec 1938Box 166 \ 2  img231
Letter from Joseph Lucas Limited regarding the specification and testing of RR1 regulators.21th Dec 1938Box 166 \ 2  img232
Laboratory advice note detailing settings for four regulators.23th Dec 1938Box 166 \ 2  img233
Requesting instructions for adjusting a faulty cutout on Car 25.G.VI.4th Jan 1939Box 166 \ 2  img234
Letter to Joseph Lucas Ltd. detailing test results for four R.R.1. type regulators.10th Jan 1939Box 166 \ 2  img235
Technical memorandum detailing the testing and specification for adjusting a regulator, including a table of output results.7th Jan 1939Box 166 \ 2  img236
Letter detailing test procedures for a regulator, specifying voltage and amperage outputs under certain conditions.7th Jan 1939Box 166 \ 2  img237
Test results for four RR1 type regulators adjusted by Messrs. Lucas, operating on an R.R. dynamo.7th Jan 1939Box 166 \ 2  img238
Summary of test results for electrical regulators comparing different manufacturers and modifications.16th Jan 1964Box 166 \ 2  img239
Arranging for the despatch of two Lucas RR.1 type regulators for examination.11th Jan 1939Box 166 \ 2  img240
Letter to Joseph Lucas Ltd. regarding a modification to dynamo field coils and regulator compatibility.14th Jan 1939Box 166 \ 2  img241
Letter from Joseph Lucas Limited regarding the modification of dynamo field coil resistance.17th Jan 1939Box 166 \ 2  img242
Specification for the Lucas regulator type RR.1 (Single Contact).18th Jan 1939Box 166 \ 2  img243
Page 2 of a regulator testing procedure, detailing current, voltage, and RPM specifications.18th Jan 1939Box 166 \ 2  img244
Wiring diagram for the testing arrangement of a Lucas R.R.I type regulator.11th Jan 1939Box 166 \ 2  img245
Inquiring about the resistance specifications for the LR.7 voltage regulator compared to the C.A.V. regulator.20th Jan 1939Box 166 \ 2  img246
Suitable resistance value for the dynamo field as governed by the regulator.24th Jan 1939Box 166 \ 2  img247


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