| Description | Date | Identifier | |
| Correct fusing value for a regulator resistance unit. | 14th Jan 1938 | Box 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 1938 | Box 166 \ 2 img148 | |
| Letter to Joseph Lucas Ltd. regarding the testing and specifications of an LR7 regulator, model LT.1427. | 18th Jan 1938 | Box 166 \ 2 img149 | |
| Letter to J. Lucas Co. Ltd. regarding the standardisation of regulator units for testing. | 18th Jan 1938 | Box 166 \ 2 img150 | |
| Request for a modification to a base plate to mount a Lucas regulator on a Bentley III. | 19th Jan 1938 | Box 166 \ 2 img151 | |
| Letter from Joseph Lucas Limited regarding the production of LR.7 Voltage Regulators and control boxes. | 22th Jan 1938 | Box 166 \ 2 img152 | |
| Requesting the dispatch of a Bentley Ill Regulator Unit to Messrs. Lucas for modification. | 25th Jan 1938 | Box 166 \ 2 img153 | |
| Letter to Joseph Lucas Ltd. regarding the supply and specific wiring of an LR7 regulator. | 26th Jan 1938 | Box 166 \ 2 img154 | |
| Inquiry to J. Stone & Co. Ltd. regarding the availability and price of dynamo voltage regulators for cars. | 27th Jan 1938 | Box 166 \ 2 img155 | |
| Letter to Joseph Lucas Ltd. detailing disappointing bench test results for three C.A.V. regulators. | 27th Jan 1938 | Box 166 \ 2 img156 | |
| Proposal to alter test specifications for higher output, comparing current and suggested amperage ranges at set voltages. | 27th Jan 1938 | Box 166 \ 2 img157 | |
| Letter concerning the Control Box unit for three experimental Bentley models, discussing regulators, resistance placement, and wiring. | 28th Jan 1938 | Box 166 \ 2 img158 | |
| Letter from Joseph Lucas Limited regarding the necessity and placement of a dynamo field fuse. | 28th Jan 1938 | Box 166 \ 2 img159 | |
| The bench testing and modification of a regulator-cutout unit for scheme DCD.71. | 1st Feb 1938 | Box 166 \ 2 img160 | |
| Note suggesting a regulator was wrongly blamed for an issue caused by blowing dynamo fuses. | 3rd Feb 1938 | Box 166 \ 2 img161 | |
| Examination and test report on a faulty C.A.V. regulator from chassis 3.BU.138. | 3rd Feb 1938 | Box 166 \ 2 img162 | |
| Continuation page of a document discussing supplied armature fuses. | 3rd Feb 1938 | Box 166 \ 2 img163 | |
| Customer complaint about a flat battery and non-charging dynamo, traced to the voltage regulator on a Phantom III. | 3rd Feb 1938 | Box 166 \ 2 img164 | |
| Requesting the removal of a regulator from car 35.EX for testing and replacement. | 4th Feb 1938 | Box 166 \ 2 img165 | |
| Two outstanding invoices from Joseph Lucas Ltd. for five voltage regulators. | 4th Feb 1938 | Box 166 \ 2 img166 | |
| New specification, supply issues, and fitting recommendations for a high output regulator. | 5th Feb 1938 | Box 166 \ 2 img167 | |
| Request for the production of three modified sub-bases for mounting Lucas regulators on Bentley III cars. | 9th Feb 1938 | Box 166 \ 2 img168 | |
| Summary of a visit to Messrs Lucas to investigate and discuss dynamo regulator troubles and specifications. | 11th Feb 1938 | Box 166 \ 2 img169 | |
| Modifications and specifications for Lucas regulators and control units. | 11th Feb 1938 | Box 166 \ 2 img170 | |
| Two C.A.V. type regulators with higher output characteristics received from Messrs. Lucas. | 14th Feb 1938 | Box 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 1938 | Box 166 \ 2 img172 | |
| Requesting the fitting of two experimental higher output C.A.V. regulators onto test cars. | 15th Feb 1938 | Box 166 \ 2 img173 | |
| Comparing the characteristics of two C.A.V. regulators, a standard unit and a new higher output model. | 16th Feb 1938 | Box 166 \ 2 img174 | |
| Fitting of experimental C.A.V. regulators with a higher setting to two cars. | 17th Feb 1938 | Box 166 \ 2 img175 | |
| Parts request for a Bentley III Regulator and Cutout Unit to be sent to Messrs. Lucas. | 17th Feb 1938 | Box 166 \ 2 img176 | |
| C.A.V. regulators and the problem of battery sulphating. | 22th Feb 1938 | Box 166 \ 2 img177 | |
| C.A.V. regulators and complaints of battery sulphating. | 22th Feb 1938 | Box 166 \ 2 img178 | |
| List of parts for Bentley III Regulators and Cut-Outs to be sent to Messrs Lucas. | 24th Feb 1938 | Box 166 \ 2 img179 | |
| Invoices from Messrs. Joseph Lucas Limited for 5 Regulators, requesting payment clearance. | 24th Feb 1938 | Box 166 \ 2 img180 | |
| Order for B.2.CJ1A Voltage Regulators set to a specific high voltage. | 24th Feb 1938 | Box 166 \ 2 img181 | |
| The parts list for Bentley III Regulators & Cut-out to be ordered from Messrs Lucas. | 2nd Mar 1938 | Box 166 \ 2 img182 | |
| Improvements to dynamo output regulators and a switch from 60 to 48 watt bulbs. | 3rd Mar 1938 | Box 166 \ 2 img183 | |
| Returning 60 Watt bulbs for replacement in relation to dynamo output regulators. | 4th Mar 1938 | Box 166 \ 2 img184 | |
| Internal request to order 12 Voltage Regulators from Messrs. Joseph Lucas Ltd. for testing purposes. | 5th Mar 1938 | Box 166 \ 2 img185 | |
| Letter from J. Stone & Company to discuss the suitability of an H. type regulator and arrange a meeting. | 7th Feb 1938 | Box 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 1938 | Box 166 \ 2 img188 | |
| Letter from J. Stone & Company regarding the decision not to use their Carbon Pile Regulators. | 8th Mar 1938 | Box 166 \ 2 img189 | |
| Advice note from Joseph Lucas Limited for an experimental LR7 regulator on a Rolls Royce base. | 11th Mar 1938 | Box 166 \ 2 img190 | |
| Advice note from Joseph Lucas Limited regarding the dispatch of an L.R.7 Regulator. | 11th Mar 1938 | Box 166 \ 2 img191 | |
| The supply of special regulators for the Phantom III to fix battery charging issues. | 18th Mar 1938 | Box 166 \ 2 img192 | |
| The fitting of a new R.R. type Lucas regulator for a Bentley III chassis. | 18th Mar 1938 | Box 166 \ 2 img193 | |
| Letter to Messrs. Lucas Ltd. regarding the fitting and return of an LR.7 regulator. | 22th Mar 1928 | Box 166 \ 2 img194 | |
| Instructions for modifying a Lucas LR.7 type regulator, involving replacing an obsolete unit. | 23th Mar 1938 | Box 166 \ 2 img195 | |
| Obsolete Bentley III Lucas L.R.7 Regulator Unit. | 24th Mar 1938 | Box 166 \ 2 img196 | |
| Fitting of a new Lucas LR.7 regulator to Bentley car B.56.BN. | 8th Apr 1938 | Box 166 \ 2 img197 | |
| Letter to Messrs. Joseph Lucas Ltd. reporting a failure of an LR.7 regulator unit during testing. | 14th Apr 1938 | Box 166 \ 2 img198 | |
| Failure of an experimental Lucas R.R. Type Regulator during bench tests. | 14th Apr 1938 | Box 166 \ 2 img199 | |
| Requesting a faulty Lucas R.R. type Regulator be forwarded for repair. | 20th Apr 1938 | Box 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 1938 | Box 166 \ 2 img201 | |
| Letter to Messrs. Lucas Ltd. regarding a regulator that was despatched without being addressed to the correct person. | 26th Apr 1938 | Box 166 \ 2 img202 | |
| The return of a Lucas regulator for B.50 to the makers for examination. | 2nd May 1938 | Box 166 \ 2 img203 | |
| Letter to Messrs. Lucas Ltd. regarding the return of a special regulator unit following a phone conversation. | 2nd May 1938 | Box 166 \ 2 img204 | |
| Letter from Joseph Lucas Ltd regarding the misdirection and subsequent investigation of a returned Regulator and Cutout unit. | 6th May 1938 | Box 166 \ 2 img205 | |
| Parts list for Bentley III Regulators to be ordered from Messrs Lucas. | 6th Jul 1938 | Box 166 \ 2 img206 | |
| Test report on a dynamo and regulator for car 35.EX. | 11th Jul 1938 | Box 166 \ 2 img207 | |
| Test results of battery charging current after a run and subsequent examination of the dynamo commutator. | 11th Jul 1938 | Box 166 \ 2 img208 | |
| Requesting the replacement of a burnt-out series coil on chassis 7.B.V. | 13th Jul 1938 | Box 166 \ 2 img209 | |
| Requesting the removal and refitting of a Lucas regulator on car B.56.BN. | 19th Jul 1938 | Box 166 \ 2 img210 | |
| Requesting the replacement of a faulty experimental C.A.V. regulator on car 35-EX. | 19th Jul 1938 | Box 166 \ 2 img211 | |
| The performance characteristics and agreed settings for a C.A.V. Type Regulator with 2 1/4 turns. | 19th Aug 1938 | Box 166 \ 2 img212 | |
| Specification for C.A.V. Type Regulator B.2.CS/11 for Chassis Dynamos, outlining electrical performance tests. | 23th Apr 1937 | Box 166 \ 2 img213 | |
| Page detailing a test procedure concerning amperes and regulator adjustment. | 1st Sep 1938 | Box 166 \ 2 img214 | |
| The replacement of an overheated and damaged Lucas R.R. type regulator cutout unit on car 8.B.V. | 1st Sep 1938 | Box 166 \ 2 img215 | |
| Comparing output figures for voltage regulators from a supplier and internal drawings, highlighting discrepancies and requesting further testing. | 6th Sep 1938 | Box 166 \ 2 img216 | |
| New Cutout and Regulator Unit for Bentley III and Bentley 50 models, replacing a previous mock-up. | 7th Sep 1938 | Box 166 \ 2 img217 | |
| Instruction memo regarding sending covers to Messrs. Lucas for regulator protection. | 20th Sep 1938 | Box 166 \ 2 img218 | |
| Damaged and overheated Lucas type regulator cutout unit removed from car 8.B.V. | 20th Sep 1938 | Box 166 \ 2 img219 | |
| Incorrect resistance value in the regulator resistance unit for a Wraith. | 5th Oct 1938 | Box 166 \ 2 img220 | |
| Request to forward a speedometer and bulbs to Mr. I.M. Waller in France for testing. | 26th Oct 1938 | Box 166 \ 2 img221 | |
| Letter requesting further information to diagnose a faulty regulator causing a battery to overcharge. | 26th Oct 1938 | Box 166 \ 2 img222 | |
| Communication regarding the dispatch of a speedometer suitable for a 9/37 back axle ratio. | 26th Oct 1938 | Box 166 \ 2 img223 | |
| Issues with H.T. wire, distributor components, and proposed solutions. | 31th Oct 1938 | Box 166 \ 2 img224 | |
| Swamping ratios and operating voltages for Lucas L.R.7. Regulators. | 6th Dec 1938 | Box 166 \ 2 img225 | |
| Letter to Joseph Lucas Ltd. concerning a discrepancy in a regulator's swamp to coil resistance ratio. | 9th Dec 1938 | Box 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 1938 | Box 166 \ 2 img227 | |
| Letter to Joseph Lucas Ltd. arranging a visit to discuss outstanding points on the Lucas RR1 type regulator. | 15th Dec 1938 | Box 166 \ 2 img228 | |
| Letter from Joseph Lucas Ltd. arranging a visit to discuss voltage regulator settings. | 16th Dec 1938 | Box 166 \ 2 img229 | |
| Letter discussing the procedure for checking a new regulator type RR1 used with a 5' dynamo. | 21th Dec 1938 | Box 166 \ 2 img230 | |
| Procedures and results for dynamo and regulator testing at various speeds. | 21th Dec 1938 | Box 166 \ 2 img231 | |
| Letter from Joseph Lucas Limited regarding the specification and testing of RR1 regulators. | 21th Dec 1938 | Box 166 \ 2 img232 | |
| Laboratory advice note detailing settings for four regulators. | 23th Dec 1938 | Box 166 \ 2 img233 | |
| Requesting instructions for adjusting a faulty cutout on Car 25.G.VI. | 4th Jan 1939 | Box 166 \ 2 img234 | |
| Letter to Joseph Lucas Ltd. detailing test results for four R.R.1. type regulators. | 10th Jan 1939 | Box 166 \ 2 img235 | |
| Technical memorandum detailing the testing and specification for adjusting a regulator, including a table of output results. | 7th Jan 1939 | Box 166 \ 2 img236 | |
| Letter detailing test procedures for a regulator, specifying voltage and amperage outputs under certain conditions. | 7th Jan 1939 | Box 166 \ 2 img237 | |
| Test results for four RR1 type regulators adjusted by Messrs. Lucas, operating on an R.R. dynamo. | 7th Jan 1939 | Box 166 \ 2 img238 | |
| Summary of test results for electrical regulators comparing different manufacturers and modifications. | 16th Jan 1964 | Box 166 \ 2 img239 | |
| Arranging for the despatch of two Lucas RR.1 type regulators for examination. | 11th Jan 1939 | Box 166 \ 2 img240 | |
| Letter to Joseph Lucas Ltd. regarding a modification to dynamo field coils and regulator compatibility. | 14th Jan 1939 | Box 166 \ 2 img241 | |
| Letter from Joseph Lucas Limited regarding the modification of dynamo field coil resistance. | 17th Jan 1939 | Box 166 \ 2 img242 | |
| Specification for the Lucas regulator type RR.1 (Single Contact). | 18th Jan 1939 | Box 166 \ 2 img243 | |
| Page 2 of a regulator testing procedure, detailing current, voltage, and RPM specifications. | 18th Jan 1939 | Box 166 \ 2 img244 | |
| Wiring diagram for the testing arrangement of a Lucas R.R.I type regulator. | 11th Jan 1939 | Box 166 \ 2 img245 | |
| Inquiring about the resistance specifications for the LR.7 voltage regulator compared to the C.A.V. regulator. | 20th Jan 1939 | Box 166 \ 2 img246 | |
| Suitable resistance value for the dynamo field as governed by the regulator. | 24th Jan 1939 | Box 166 \ 2 img247 | |
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