| Description | Date | Identifier | |
| Excessive pinion wear and starter gear noise issues for car 14-EX. | 1st Nov 1928 | Box 64 \ 4 scan0098 | |
| Instructing the Stores to despatch a starter motor pinion to Mr. Royce after examination. | 1st Nov 1928 | Box 64 \ 4 scan0099 | |
| Design, performance testing, and manufacturing challenges of the SS Starter Motor & Gear, No.2B Scheme. | 8th Nov 1928 | Box 64 \ 4 scan0100 | |
| Improvements to the starter motor for SS cars, including gear ratios, armature modifications, and engagement issues. | 8th Nov 1928 | Box 64 \ 4 scan0101 | |
| Telegram about a starter motor pinion and a request for the car to be delivered with increased rear damping. | 10th Nov 1928 | Box 64 \ 4 scan0102 | |
| Technical discussion and review of the 'SS' Starter Motor. | 10th Nov 1928 | Box 64 \ 4 scan0103 | |
| Modifications and testing for motors and a vehicle, including conductor shape and damping. | 13th Nov 1928 | Box 64 \ 4 scan0104 | |
| Table of gaps for a push button switch, drawing D.70790. | 13th Nov 1928 | Box 64 \ 4 scan0105 | |
| Parts required for the 'N' Scheme 2447 Flywheel & Clutch. | 14th Nov 1928 | Box 64 \ 4 scan0106 | |
| Modifications and the urgency of a new armature for the starter motor on chassis 9-EX. | 14th Nov 1928 | Box 64 \ 4 scan0107 | |
| Modifications and specifications for the S.S. Starter Motor, focusing on gear ratio, windings, and engagement. | 16th Nov 1928 | Box 64 \ 4 scan0108 | |
| Returning to parallel teeth in place of 5 degree helical for the motor. | 16th Nov 1928 | Box 64 \ 4 scan0109 | |
| Alternative Flywheel Gear Ring and instructions for the production of blanks. | 19th Nov 1928 | Box 64 \ 4 scan0110 | |
| Request to obtain stranded flexible copper conductor from the Morgan Crubible Company for a main switch lever. | 4th Dec 1928 | Box 64 \ 4 scan0111 | |
| Cover memo for the specification of production inspection and test of an EAC.10 push button switch. | 5th Dec 1928 | Box 64 \ 4 scan0112 | |
| Specification for the production inspection and testing of a push-button switch. | 15th Dec 1928 | Box 64 \ 4 scan0113 | |
| Modifications to the S.S. Sequence Starter's main and auxiliary switch to correct an electrical interlock issue. | 7th Dec 1928 | Box 64 \ 4 scan0114 | |
| The lever lengths and ratios for a main and relay switch unit. | 12th Dec 1928 | Box 64 \ 4 scan0115 | |
| Extract from a written note regarding the timing and mechanical interlock of a magnetic switch unit. | 8th Dec 1928 | Box 64 \ 4 scan0116 | |
| Modifications required for a SS Sequence Starter Main Switch. | 12th Aug 1928 | Box 64 \ 4 scan0117 | |
| Recommendation to wire the SS Starter with a double-pole push-button switch as a fail-safe. | 10th Dec 1928 | Box 64 \ 4 scan0118 | |
| Design improvements and testing requirements for an SS. Sequence Starter. | 11th Dec 1928 | Box 64 \ 4 scan0119 | |
| Tests and modifications on S.S. and 9-EX starters. | 12th Dec 1923 | Box 64 \ 4 scan0120 | |
| The test of a new apparatus, detailing its components and performance during testing. | 12th Dec 1923 | Box 64 \ 4 scan0121 | |
| Motor and gear engagement/disengagement faults and performance comparisons. | 12th Dec 1923 | Box 64 \ 4 scan0122 | |
| Analysis of a mechanical disengagement problem, discussing noise, solutions, and further testing on an 18-EX chassis. | 12th Dec 1928 | Box 64 \ 4 scan0123 | |
| Note on a method for observing gear functionality. | 12th Dec 1928 | Box 64 \ 4 scan0124 | |
| Internal order request for 8 sets of parts for an S.S. Starter Switch, replacing a previous design. | 14th Dec 1928 | Box 64 \ 4 scan0125 | |
| Design, timing and operation of a starter push button switch. | 14th Dec 1928 | Box 64 \ 4 scan0126 | |
| The testing of a sequence starter, comparing it with the Bosch system and considering modifications to prevent thumping. | 15th Dec 1928 | Box 64 \ 4 scan0127 | |
| Use of a higher rated spring with a taper armature and the necessity of fluid damping. | 15th Dec 1928 | Box 64 \ 4 scan0128 | |
| Experiments with an S.S. Sequence Starter, specifically investigating corner jamming of the teeth. | 17th Dec 1928 | Box 64 \ 4 scan0129 | |
| Continued discussion on spring force, armature pull, and brush friction in a motor. | 17th Dec 1928 | Box 64 \ 4 scan0130 | |
| Spring force, armature engagement, and the effectiveness of taper in a mechanical component. | 17th Dec 1928 | Box 64 \ 4 scan0131 | |
| Starter motor engagement failures, discussing spring strength, longitudinal pull, and winding specifications. | 17th Dec 1928 | Box 64 \ 4 scan0132 | |
| Technical comparison of motor armature performance, focusing on failure modes, noise issues and potential improvements. | 17th Dec 1928 | Box 64 \ 4 scan0133 | |
| Gear noise and disengagement issues, with a comparison of S.S. and Bosch starters. | 17th Dec 1928 | Box 64 \ 4 scan0134 | |
| Typed document discussing starter motor problems, comparing gear ratios and spring ratings to a Bosch unit. | 17th Dec 1928 | Box 64 \ 4 scan0135 | |
| Secret memo regarding arrangements for daily testing of a new starter motor. | 17th Dec 1928 | Box 64 \ 4 scan0136 | |
| Suggested modifications for a sequence starter main and auxiliary switch following testing. | 18th Dec 1928 | Box 64 \ 4 scan0137 | |
| Engagement issues and potential solutions for the 'SS' starter model X.7655. | 18th Dec 1928 | Box 64 \ 4 scan0138 | |
| Instructions and measurements for a Main Switch Coil Discharge Resistance. | 18th Dec 1928 | Box 64 \ 4 scan0139 | |
| Extract from a report on a faulty starter motor on car 18.EX, requesting replacement springs. | 18th Dec 1928 | Box 64 \ 4 scan0140 | |
| Modifications and new parts for an automatic switch. | 19th Dec 1928 | Box 64 \ 4 scan0141 | |
| Specification for the production adjustment of a combined main and auxiliary switch unit, version 2. | 19th Dec 1928 | Box 64 \ 4 scan0142 | |
| Adjustment instructions for main and auxiliary switch contacts and gaps. | 19th Dec 1928 | Box 64 \ 4 scan0143 | |
| Continued note on adjustments regarding gaps and distances, and checking the forces involved. | 19th Dec 1928 | Box 64 \ 4 scan0144 | |
| Specification sheet for basic gaps on a Main and Auxiliary Switch Unit, version 2. | 19th Dec 1928 | Box 64 \ 4 scan0145 | |
| Travel table for a starter duplex automatic switch, detailing lever gap measurements at various positions. | 29th Dec 1928 | Box 64 \ 4 scan0146 | |
| Gap tables for a main and auxiliary switch unit, version 2. | 19th Dec 1928 | Box 64 \ 4 scan0147 | |
| Starter motor gear engagement, focusing on the blockage caused by conventional chamfering methods. | 12th Dec 1928 | Box 64 \ 4 scan0148 | |
| Discussion with diagrams on modifying gear tooth form to improve engagement. | 21th Dec 1928 | Box 64 \ 4 scan0149 | |
| Technical memorandum discussing improvements to a sequence starter's design to make it more vigorous and silent. | 21th Dec 1928 | Box 64 \ 4 scan0150 | |
| Improvements to an S.S. Sequence Starter, focusing on spring pressure to resolve engagement issues. | 22th Dec 1928 | Box 64 \ 4 scan0151 | |
| Motor experiments concerning spring rates, dampers, and engaging/disengaging thump. | 22th Dec 1928 | Box 64 \ 4 scan0152 | |
| Suggestions for a damper attachment to a starter motor for silent operation. | 25th Dec 1928 | Box 64 \ 4 scan0153 | |
| Telephone message discussing design improvements for a starter armature and associated components. | 27th Dec 1928 | Box 64 \ 4 scan0154 | |
| Issues with the starter motor and switch unit on vehicle 18-EX in France. | 28th Dec 1928 | Box 64 \ 4 scan0155 | |
| Modifications and trials of a sequence starter, including spring alterations and armature taper designs. | 31th Dec 1928 | Box 64 \ 4 scan0156 | |
| Report discussing longitudinal pull in the S.S. chassis, and proposals for new brushes and a Bosch oil damper. | 2nd Jan 1929 | Box 64 \ 4 scan0157 | |
| Special chamfer modification to a motor pinion to improve engagement. | 2nd Jan 1929 | Box 64 \ 4 scan0158 | |
| The production of a duplex push button starter switch for an S.S. chassis, potentially for chassis 23-EX. | 18th Jan 1929 | Box 64 \ 4 scan0159 | |
| Proposal for a new starter motor system using a double reduction gear with a spiral first motion. | 26th Jan 1929 | Box 64 \ 4 scan0160 | |
| Diagram of a spring-loaded starter pinion with a slip clutch, showing its engagement with a flywheel gear. | 23th Jan 1929 | Box 64 \ 4 scan0161 | |
| Requesting urgent trials of experimental modifications for a sequence starter motor and gear system. | 23th Jan 1929 | Box 64 \ 4 scan0162 | |
| Proposal for incorporating drip plug lubrication into the starter motor dashpot scheme. | 24th Jan 1929 | Box 64 \ 4 scan0163 | |
| The blueprint for a Press Button Starter Switch. | 26th Jan 1929 | Box 64 \ 4 scan0164 | |
| Experimental tests of a sequence starter rig to investigate gear jamming issues. | 26th Jan 1929 | Box 64 \ 4 scan0165 | |
| Analysis of the cause of jamming observed between pinion and wheel teeth. | 26th Jan 1929 | Box 64 \ 4 scan0166 | |
| Continued memorandum discussing the cause and potential cure for engaging corner jams in a pinion mechanism. | 26th Jan 1929 | Box 64 \ 4 scan0167 | |
| Experiments with a rig, detailing initial engagement failures and ongoing investigations into system weaknesses under reduced voltage. | 29th Jan 1929 | Box 64 \ 4 scan0168 | |
| Design and blueprint for the SS.Press Button Starter Switch, LeC.2641. | 29th Jan 1929 | Box 64 \ 4 scan0169 | |
| The design of engaging corners for a sequence starter, advocating for a simpler approach. | 30th Jan 1929 | Box 64 \ 4 scan0170 | |
| Instruction regarding the inadequate length of the splines on a sequence starter motor pinion. | 1st Feb 1929 | Box 64 \ 4 scan0171 | |
| Issues with the S.S. starter motor pinion splines, comparing them to a Bosch part and requesting improvement. | 1st Feb 1929 | Box 64 \ 4 scan0172 | |
| List of blueprints for an S.S. Press Button Starter Switch. | 2nd Feb 1929 | Box 64 \ 4 scan0173 | |
| Bearing surface of S.S. starter pinions and the return of two units. | 4th Feb 1929 | Box 64 \ 4 scan0174 | |
| Requesting a trial pinion with rounded corners for the S.S. starter rig, with a handwritten note on the delay. | 7th Feb 1929 | Box 64 \ 4 scan0175 | |
| Requesting tests on three different modifications of a starter motor pinion. | 8th Feb 1929 | Box 64 \ 4 scan0176 | |
| Wear on the starter motor pinion and a proposal for its modification. | 13th Feb 1929 | Box 64 \ 4 scan0177 | |
| Cross-sectional drawing of a piston assembly with design notes. | 15th Feb 1929 | Box 64 \ 4 scan0178 | |
| Modifications to the S.S. Sequence Starter motor based on rig test results, specifically regarding the main armature spring. | 15th Feb 1929 | Box 64 \ 4 scan0179 | |
| Further trials on a S.S. Sequence Starter engagement, investigating issues with varying voltage and pinion designs. | 15th Feb 1929 | Box 64 \ 4 scan0180 | |
| Experiments to resolve starter motor engagement failures by adjusting armature current, spring arrangements, and contact timing. | 15th Feb 1929 | Box 64 \ 4 scan0181 | |
| Improvements made to a pinion engagement mechanism to prevent failure and jamming. | 15th Feb 1929 | Box 64 \ 4 scan0182 | |
| Short memo requesting remarks on a matter before it is passed to the D.O. | 15th Feb 1929 | Box 64 \ 4 scan0183 | |
| Trial results for the 'SS' Sequence Starter regarding corner jamming failures and voltage effects. | 19th Feb 1929 | Box 64 \ 4 scan0184 | |
| Requesting a supply of various starter motor pinions. | 26th Feb 1929 | Box 64 \ 4 scan0185 | |
| Specification of production adjustment for a combined main switch and auxiliary switch unit, version 4. | 27th Feb 1929 | Box 64 \ 4 scan0186 | |
| Page of instructions for adjusting main and auxiliary switch units, detailing clearance settings. | 27th Feb 1929 | Box 64 \ 4 scan0187 | |
| Page of instructions detailing the final adjustments for the gap of lower contacts and a relay lever. | 27th Feb 1929 | Box 64 \ 4 scan0188 | |
| Specification sheet for basic gaps in a main and auxiliary switch unit, version 4. | 27th Feb 1929 | Box 64 \ 4 scan0189 | |
| Gap table for a main and auxiliary switch unit. | 27th Feb 1929 | Box 64 \ 4 scan0190 | |
| Suggestions for improving the sequence starter push button switch after examination in the lab. | 28th Feb 1929 | Box 64 \ 4 scan0191 | |
| Report with recommendations for altering the 'SS' starter push button switch. | 1st Mar 1929 | Box 64 \ 4 scan0192 | |
| Laboratory test report on a sequence starter motor and its switches. | 3rd Mar 1929 | Box 64 \ 4 scan0193 | |
| Electrical operation tests on a starter motor, comparing different armature and winding configurations. | 3rd Mar 1929 | Box 64 \ 4 scan0194 | |
| Status update on a component test involving a taper armature and damper. | 6th Mar 1929 | Box 64 \ 4 scan0195 | |
| Recommending changes for a sequence starter motor with a damper. | 6th Mar 1929 | Box 64 \ 4 scan0196 | |
| Notes on armature spring settings, pinion clearance, and motor travel modifications. | 6th Mar 1929 | Box 64 \ 4 scan0197 | |
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