| Description | Date | Identifier | |
| Test report comparing the performance of standard brushes on a modified machine. | 13th Jul 1927 | Box 60 \ 1 Scan026 | |
| The wear measurements of brushes, comparing results to a previous machine test. | 29th Jun 1920 | Box 60 \ 1 Scan027 | |
| Continuation of a report discussing brush tests on the standardised 40/50 dynamo. | 18th Aug 1927 | Box 60 \ 1 Scan028 | |
| Test report detailing observations on brush wear for I and K type dynamos. | 24th Oct 1927 | Box 60 \ 1 Scan029 | |
| The condition of brushes and commutators, comparing the N13 and standard WB machines. | 8th Dec 1924 | Box 60 \ 1 Scan030 | |
| Test report on Le-Carbone EG3417 narrow brushes on an M Machine, including brush wear results. | 24th Oct 1927 | Box 60 \ 1 Scan031 | |
| The performance of a type of brush, noting wear, dust, surface condition, noise, and commutation qualities. | 8th Dec 1924 | Box 60 \ 1 Scan032 | |
| Arranging the swap of a dynamo between experimental chassis for a 10,000-mile test. | 22th Nov 1927 | Box 60 \ 1 Scan033 | |
| Experimental testing of an auto charge control switch and related components. | 5th Dec 1927 | Box 60 \ 1 Scan034 | |
| Continued memo discussing the comparison between a 'Midgley unit' and their own system, referencing past tests and future experiments. | 21th Dec 1927 | Box 60 \ 1 Scan035 | |
| Internal instruction memo regarding a Dynamo with EG2 Morganite brushes for Chassis 12-EX. | 21th Dec 1927 | Box 60 \ 1 Scan036 | |
| Instruction sheet detailing the test results of Morganite narrow brushes on an M machine. | 2nd Feb 1928 | Box 60 \ 1 Scan037 | |
| Inspection report on the condition of control brushes and commutator segments, with a recommendation for further testing. | 30th May 1928 | Box 60 \ 1 Scan038 | |
| Specifications and part numbers for a modified S.S. Dynamo installation on chassis L.C.2501. | 30th May 1928 | Box 60 \ 1 Scan039 | |
| Recommending the instructioning of a 28 slot armature for the Phantom dynamo. | 7th Jun 1928 | Box 60 \ 1 Scan040 | |
| Instruction to fit a 28 slot Armature D.71347 in place of the standard armature for a specific chassis. | 8th Jun 1928 | Box 60 \ 1 Scan041 | |
| Requesting a new armature be instructed for an S.S. Dynamo machine. | 9th Jun 1928 | Box 60 \ 1 Scan042 | |
| Instruction regarding the unavailability of an S.S. Dynamo Armature and the need to order a new one. | 13th Jun 1928 | Box 60 \ 1 Scan043 | |
| Instructions regarding a change to a new Dynamo Armature and the dispatch of corresponding blueprints. | 21th Jun 1928 | Box 60 \ 1 Scan044 | |
| Suggesting tests on brushes with modified bevels to investigate brush noise. | 11th Jul 1928 | Box 60 \ 1 Scan045 | |
| Requesting an adjustment to the commutator connections of an S.S. dynamo based on preliminary test results. | 2nd Sep 1928 | Box 60 \ 1 Scan046 | |
| List of various grades of brushes for possible testing, separated by manufacturer and application. | 19th Sep 1928 | Box 60 \ 1 Scan047 | |
| Suggesting an increase in brush bevel angle from 15° to 45° to address brush noise issues. | 16th Oct 1928 | Box 60 \ 1 Scan048 | |
| Test results and required modifications for an S.S. Dynamo. | 16th Oct 1928 | Box 60 \ 1 Scan049 | |
| Fitting a new S.S.1 dynamo to an S.S. engine and returning the old TL.95 dynamo. | 15th Oct 1928 | Box 60 \ 1 Scan050 | |
| Improvement to Phantom dynamo brushes by altering the bevel angle to reduce chattering. | 16th Oct 1928 | Box 60 \ 1 Scan051 | |
| Recommending a new commutator position for the S.S. Chassis dynamo, enclosing updated diagrams for modification. | 27th Oct 1928 | Box 60 \ 1 Scan052 | |
| Request to supply blueprint parts including brushes, cable eyes, and springs for testing on a Phantom Dynamo. | 6th Nov 1928 | Box 60 \ 1 Scan053 | |
| Extract from a CWH (France) report on dynamo and electrical issues with vehicle 18-EX. | 18th Dec 1928 | Box 60 \ 1 Scan054 | |
| Instructions regarding two lots of Morganite EG2 grade brushes received for the Phantom dynamo. | 12th Dec 1928 | Box 60 \ 1 Scan055 | |
| Requesting the removal of dynamo I from car 9-EX to examine its experimental armature and brushes after 10,000 miles. | 13th Dec 1928 | Box 60 \ 1 Scan056 | |
| Specification for the inspection and test of an N.B. type dynamo with a 28 slot armature. | 19th Dec 1928 | Box 60 \ 1 Scan057 | |
| Procedure for testing and bedding the brushes of a dynamo. | 19th Dec 1928 | Box 60 \ 1 Scan058 | |
| Test procedure for a dynamo, covering brush bedding, load tests, and noise/vibration checks. | 19th Dec 1928 | Box 60 \ 1 Scan059 | |
| Instructions for examining and testing a machine's armature, bearings, and insulation. | 22th Dec 1928 | Box 60 \ 1 Scan060 | |
| Test report for an S.S. dynamo No.SS5, detailing performance data and faults. | 22th Dec 1928 | Box 60 \ 1 Scan061 | |
| Requesting verification of an unfavourable test report for a Phantom S.S. dynamo intended for France. | 22th Dec 1928 | Box 60 \ 1 Scan062 | |
| Extract detailing an adjustment to a Dynamo's control brush and its effect on battery charge. | 28th Dec 1928 | Box 60 \ 1 Scan063 | |
| Request for an additional S.S. motor and dynamo to replace ones not yet returned from Chateauroux. | 8th Jan 1929 | Box 60 \ 1 Scan064 | |
| Letter to Mr G.W. Hancock in France requesting the urgent return of a dynamo and starter motor. | 8th Jan 1928 | Box 60 \ 1 Scan065 | |
| Test report on the performance of a green-lamp switch and dynamo for car 20EX. | 11th Jan 1929 | Box 60 \ 1 Scan066 | |
| Instruction sheet detailing the peak output test of a dynamo (SS2). | 17th Jan 1929 | Box 60 \ 1 Scan067 | |
| Request to examine Morganite dynamo brushes from chassis 9-EX after 10,000 miles of use. | 17th Jan 1929 | Box 60 \ 1 Scan068 | |
| Instruction memo for the construction of a special S.S. Dynamo, a modified Phantom Dynamo. | 26th Jan 1929 | Box 60 \ 1 Scan069 | |
| Modifications to dynamos to improve charging current at high speeds. | 30th Jan 1929 | Box 60 \ 1 Scan070 | |
| Requesting a new commutator and bearing be fitted to a 28 slot Dynamo L. | 1st Feb 1929 | Box 60 \ 1 Scan071 | |
| Dynamo output in response to sales department concerns and increased electrical demand. | 5th Feb 1929 | Box 60 \ 1 Scan072 | |
| Increasing machine output, weight considerations, and the inclusion of a green lamp indicator in the chassis electrical system. | 5th Feb 1929 | Box 60 \ 1 Scan073 | |
| Recommending the standardisation of Morganite Grade EG2 brushes for Phantom and S.E. dynamos following successful 10,000-mile testing. | 7th Feb 1929 | Box 60 \ 1 Scan074 | |
| 10,000-mile test of Morganite EC2 dynamo brushes. | 1st Feb 1929 | Box 60 \ 1 Scan075 | |
| Experimental record sheet tracking mileage and performance tests for Morganite Brushes EG2. | 19th Apr 1926 | Box 60 \ 1 Scan076 | |
| Dynamo output, weight reduction, and lighting for a chassis. | 11th Feb 1929 | Box 60 \ 1 Scan077 | |
| Specifications for dynamos on 'SS' chassis, detailing differences for test and production models. | 3rd Feb 1929 | Box 60 \ 1 Scan078 | |
| Directive to test Morganite dynamo brushes as an alternative to Le Carbone brushes for 20 HP & 40/50 HP chassis. | 3rd Feb 1929 | Box 60 \ 1 Scan079 | |
| Letter from a supplier confirming various grades of brushes have been sent for testing purposes. | 13th Feb 1929 | Box 60 \ 1 Scan080 | |
| Specifications for 'LE CARBONE' dynamo brushes submitted for trial. | 13th Feb 1929 | Box 60 \ 1 Scan081 | |
| Alternative Morganite and Le Carbone Z. brushes for the dynamo on 20 HP & 40/50 HP chassis. | 13th Feb 1929 | Box 60 \ 1 Scan082 | |
| Letter to The Le Carbone Co. Ltd. acknowledging receipt of brushes and confirming they will be tested for quietness. | 14th Feb 1929 | Box 60 \ 1 Scan083 | |
| The standardisation of Morganite dynamo brushes and the timing of new mould production. | 20th Feb 1929 | Box 60 \ 1 Scan084 | |
| Recommendations for an intermediate dynamo armature between the standard and higher output versions. | 20th Feb 1929 | Box 60 \ 1 Scan085 | |
| Experiments on Morganite brushes for the 40/50 dynamo and proposing further road tests. | 21th Feb 1929 | Box 60 \ 1 Scan086 | |
| Design of an intermediate output armature, focusing on slot count and conductor sizes to reduce noise. | 21th Feb 1929 | Box 60 \ 1 Scan087 | |
| Discussion and recommendation for an experimental 24 slot Phantom armature. | 29th Mar 1929 | Box 60 \ 1 Scan088 | |
| Urgent internal memo requesting the fitting of dynamo L to car 14-EX for testing a new brush design. | 29th Mar 1929 | Box 60 \ 1 Scan089 | |
| Dynamo output and proposing the instruction of three intermediate output dynamos to fix battery charging issues. | 4th Mar 1929 | Box 60 \ 1 Scan090 | |
| Specifications for dynamos on the 'SS' chassis for both test and production models. | 4th Apr 1929 | Box 60 \ 1 Scan091 | |
| Urging the instructioning and testing of intermediate output dynamo armatures due to insufficient charge issues. | 4th Apr 1929 | Box 60 \ 1 Scan092 | |
| Trials of intermediate armatures to ensure interchangeability with standard carcasses. | 4th Apr 1929 | Box 60 \ 1 Scan093 | |
| Specification for the electrical operation of a dynamo for the R.R. S.S. car. | 6th Apr 1929 | Box 60 \ 1 Scan094 | |
| Specifications for dynamo performance under fully hot conditions, including a table of speed, voltage, and output. | 8th Apr 1929 | Box 60 \ 1 Scan095 | |
| Discovered positional fault with the commutator on the first 'Inveried' type S.S. Dynamo armature. | 8th Apr 1929 | Box 60 \ 1 Scan096 | |
| Specification of inspection and test for Phantom & S.S. dynamos with 28 slot armatures and tunnel stampings. | 19th Apr 1929 | Box 60 \ 1 Scan097 | |
| Instructions for dynamo testing, covering pigtail conductors, insulation resistance, and brush bedding procedures. | 19th Apr 1929 | Box 60 \ 1 Scan098 | |
| Dynamo testing procedures covering brush bedding, running on load, and checks for mechanical and electrical noise. | 19th Apr 1929 | Box 60 \ 1 Scan099 | |
| Inspection and testing procedures for a dynamo, including physical checks and insulation tests. | 11th Apr 1929 | Box 60 \ 1 Scan100 | |
| Winding table for 20 HP or 40/50 HP armatures. | 11th Apr 1929 | Box 60 \ 1 Scan101 | |
| Particulars of the winding and commutator setting for intermediate output armatures for 20 HP and 40/50 HP dynamos. | 7th Apr 1929 | Box 60 \ 1 Scan102 | |
| Specification sheet for an armature detailing its construction and winding data. | 19th Apr 1929 | Box 60 \ 1 Scan103 | |
| Winding table for a 40/50 HP S.S. 6-volt armature with duplex or doubly-re-entrant wave winding. | 19th Apr 1929 | Box 60 \ 1 Scan104 | |
| New armature scheme for a 6-volt dynamo intended for U.S.A. SS. models. | 19th Apr 1929 | Box 60 \ 1 Scan105 | |
| Testing a new dynamo for an SS chassis and ordering new armatures. | 24th Apr 1929 | Box 60 \ 1 Scan106 | |
| Confirming a modified armature winding diagram for a dynamo fitted to an S.S. chassis. | 24th Apr 1929 | Box 60 \ 1 Scan107 | |
| The unsuitability of the current S.S. chassis dynamo and the plan to produce a new version. | 25th Apr 1929 | Box 60 \ 1 Scan108 | |
| Instructions regarding modifications to dynamos for the 21-EX and other SS chassis. | 26th Apr 1929 | Box 60 \ 1 Scan109 | |
| Instructions for manufacturing and modifying armatures and commutators for the SS Chassis Dynamo, with an attached list of blueprints. | 16th May 1929 | Box 60 \ 1 Scan110 | |
| Extract from Mr. Hancock's report on a dynamo's performance. | 30th May 1929 | Box 60 \ 1 Scan111 | |
| Request to draw three armature slot diagrams for dynamos and a sequence starter motor. | 7th Jun 1929 | Box 60 \ 1 Scan112 | |
| The performance and testing of higher and intermediate output dynamos for 40/50 HP and 20 HP chassis. | 5th Jul 1929 | Box 60 \ 1 Scan113 | |
| The development and planned testing of new experimental armatures for chassis. | 6th Jul 1929 | Box 60 \ 1 Scan114 | |
| The production and supply of higher output dynamos for various car models. | 6th Jul 1929 | Box 60 \ 1 Scan115 | |
| Standardisation of dynamo brushes, proposing a Morganite EG2 grade as an alternative to Le Carbone grade. | 14th Mar 1929 | Box 60 \ 1 Scan116 | |
| Calculations and test results for setting angles on an intermediate output S.S. dynamo. | 1st Aug 1929 | Box 60 \ 1 Scan117 | |
| Electrical experimental record sheet for the testing of Morganite Brushes EG2 with a 45° bevel. | 22th Feb 1929 | Box 60 \ 1 Scan118 | |
| Electrical experimental record sheet for Morganite E.G.2 brushes with a 45° bevel. | 1st Mar 1929 | Box 60 \ 1 Scan119 | |
| Request for the overhaul of a 40/50 dynamo bench-rig motor commutator due to sparking and black patches. | 27th Jul 1929 | Box 60 \ 1 Scan120 | |
| Request to remove dynamo SS2 from vehicle 21-EX for bench testing and replace it with dynamo SS3. | 13th Aug 1929 | Box 60 \ 1 Scan121 | |
| Comparison of S.M.M.&T and R.R. standards for Dynamo Brush Design. | 18th Sep 1929 | Box 60 \ 1 Scan122 | |
| Instruction sheet detailing specifications and tolerances for brushes, comparing S.M.M.+T and R.R. standards. | 8th Dec 1924 | Box 60 \ 1 Scan123 | |
| Instructions for modifying S.S. Intermediate Output Armatures by adjusting commutator connections and angles. | 21th Sep 1929 | Box 60 \ 1 Scan124 | |
| Tests to determine the optimal brush and winding angles for an intermediate output S.S. Dynamo. | 23th Sep 1929 | Box 60 \ 1 Scan125 | |
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