| Description | Date | Identifier | |
| Report comparing different change speed gearbox designs for ease of use and quiet operation. | 25th Mar 1929 | Box 6 \ 4 04-page207 | |
| Technical comparison of different gearbox mechanisms, listing advantages and disadvantages for each. | 25th Mar 1929 | Box 6 \ 4 04-page208 | |
| Comparative analysis of gearbox designs, focusing on the advantages and disadvantages of internal mesh with dog clutches. | 25th Mar 1929 | Box 6 \ 4 04-page209 | |
| Gearbox operations, difficulties with specific gears, and a proposal for an epicyclic 3rd gear with a brake. | 10th Mar 1929 | Box 6 \ 4 04-page210 | |
| Modifications to a 3-speed easy-change gearbox roller cage, including sketches. | 10th Mar 1929 | Box 6 \ 4 04-page211 | |
| Typed memo discussing the design and testing of a freewheel mechanism with a diagram of a cage component. | 14th Apr 1929 | Box 6 \ 4 04-page212 | |
| Proposal for an easy-change gearbox device using a vacuum-assisted clutch mechanism. | 14th Apr 1929 | Box 6 \ 4 04-page213 | |
| Weight reduction, body construction, and potential performance improvements for the future 20 HP model. | 16th Apr 1929 | Box 6 \ 4 04-page214 | |
| Modifications and manufacturing methods for a freewheel in a sideshaft gearbox. | 23th Apr 1929 | Box 6 \ 4 04-page215 | |
| Defect in the ground tooth form for 20 HP chassis gears and the implemented solution. | 1st May 1929 | Box 6 \ 4 04-page216 | |
| Modifications to the 20 HP chassis gears to increase their strength. | 3rd May 1929 | Box 6 \ 4 04-page217 | |
| The gear ratio limitations for the 20 HP model. | 1st May 1929 | Box 6 \ 4 04-page218 | |
| Stock levels of Bevel Wheels and Pinions for the 20-HP Chassis. | 31th May 1929 | Box 6 \ 4 04-page219 | |
| Various approaches to solving gearbox problems, focusing on silent operation and ease of use. | 3rd Jun 1929 | Box 6 \ 4 04-page220 | |
| Technical discussion on the Salerni Coupling, its disadvantages, and proposed improvements. | 3rd Jun 1929 | Box 6 \ 4 04-page221 | |
| Report discussing gearbox designs, helical gears, the Salerni coupling, and potential patents. | 11th Jun 1929 | Box 6 \ 4 04-page222 | |
| Recommending that the 20 HP, 10 x 47 axle gears should be scrapped following an increase to the engine bore. | 11th Jun 1929 | Box 6 \ 4 04-page223 | |
| Recommendation for speedometer calibration standards for S.S. and 20 HP models. | 4th Jul 1922 | Box 6 \ 4 04-page224 | |
| Request for a report on the freewheel position in the sideshaft on the 20HP gearbox. | 1st Aug 1929 | Box 6 \ 4 04-page225 | |
| Instructions to despatch 20 HP chassis gearbox gears with long teeth to the Gear Grinding Co. for completion. | 23th Aug 1929 | Box 6 \ 4 04-page226 | |
| Requesting a report on the 20 HP gearbox freewheel and discussing future clutch and flywheel design policy. | 24th Aug 1929 | Box 6 \ 4 04-page227 | |
| Comparison of freewheel designs for a 20 HP gearbox, contrasting the sideshaft and De Lavaud schemes. | 11th Oct 1929 | Box 6 \ 4 04-page228 | |
| The production and comparative testing of special long addendum teeth gears for the 20 HP gearbox. | 8th Nov 1929 | Box 6 \ 4 04-page229 | |
| Investigation into the comparative merits of spur, epicyclic, and internal (spool) gears for a silent 3rd speed gearbox. | 24th Dec 1929 | Box 6 \ 4 04-page230 | |
| Potential improvements to change speed gears, including a new silent 4-speed design. | 1st Jan 1930 | Box 6 \ 4 04-page231 | |
| Gearbox changing and silence, comparing the 20 HP and Phantom models, and considering freewheel improvements. | 25th Jan 1930 | Box 6 \ 4 04-page232 | |
| Report comparing gearbox performance, ease of use, and noise levels with competitor vehicles. | 15th Jan 1930 | Box 6 \ 4 04-page233 | |
| Comparing the silence and performance of various gearbox designs, including Wilson, Lanchester and epicyclic types. | 20th Jan 1930 | Box 6 \ 4 04-page234 | |
| 'The Gearbox Problem', comparing existing designs and proposing a new arrangement. | 10th Mar 1930 | Box 6 \ 4 04-page235 | |
| Gearbox design, including reverse units, servo drives, clutches, and braking systems. | 10th Mar 1930 | Box 6 \ 4 04-page236 | |
| New gearbox design with details on speed rings, pawls, clutches and potential patentable claims. | 13th Feb 1930 | Box 6 \ 4 04-page237 | |
| 20 HP gearbox leaking oil badly through the ball race housings on a shock absorber rig. | 13th Feb 1930 | Box 6 \ 4 04-page238 | |
| Gearbox height dropping after 3,000 miles and considering a new cross-member support. | 28th Mar 1930 | Box 6 \ 4 04-page239 | |
| Need for a support for the rear of the 20 HP gearbox following tests in France. | 7th Apr 1930 | Box 6 \ 4 04-page240 | |
| Proposal for a new rear suspension for the 20/25 HP gearbox, based on the Phantom II design. | 9th Apr 1930 | Box 6 \ 4 04-page241 | |
| Preliminary designs and problems related to a full epicyclic gearbox. | 2nd Apr 1930 | Box 6 \ 4 04-page242 | |
| Investigation of different gear train arrangements to achieve a specific ratio. | 12th Apr 1930 | Box 6 \ 4 04-page243 | |
| Investigations into the design and control of a synchro-mesh gearbox, including patent applications. | 12th Apr 1930 | Box 6 \ 4 04-page244 | |
| Brake application, gear change requirements, and potential control improvements for a vehicle's transmission system. | 12th Apr 1930 | Box 6 \ 4 04-page245 | |
| Technical memo discussing gearbox and clutch issues during vehicle coasting. | 12th Apr 1930 | Box 6 \ 4 04-page246 | |
| Three gearbox design schemes, including proposals from Mr. Hardy and Mr. Royce. | 14th Apr 1930 | Box 6 \ 4 04-page247 | |
| Technical discussion and comparison of various gearbox and clutch designs, including Armstrong-Siddeley and Chrysler systems. | 14th Apr 1930 | Box 6 \ 4 04-page248 | |
| Improvements to the car's gear change mechanism, relating to jaw clutches and resilient couplings. | 30th Apr 1932 | Box 6 \ 4 04-page249 | |
| Investigations and proposals for resolving a car gear problem. | 29th Apr 1930 | Box 6 \ 4 04-page250 | |
| Technical summary and discussion of gearbox design alternatives and considerations. | 29th Apr 1930 | Box 6 \ 4 04-page251 | |
| Design document detailing specifications for an epicyclic gearbox and servo control systems, page 3. | 29th Apr 1930 | Box 6 \ 4 04-page252 | |
| Servo-assisted sequential gear changes and an alternative flywheel sideshaft mechanism. | 26th May 1930 | Box 6 \ 4 04-page253 | |
| Request to strip and examine the freewheel on a 20 HP gearbox. | 26th May 1930 | Box 6 \ 4 04-page254 | |
| Gearbox problems and comparing various design schemes, including epicyclic and Maybach. | 26th May 1930 | Box 6 \ 4 04-page255 | |
| Design memo discussing an automatic progressive gear change system and comparing it to the Wilson gear. | 26th May 1933 | Box 6 \ 4 04-page256 | |
| Experimental easy-change gearbox fitted to the 14-EX car. | 2nd Jul 1930 | Box 6 \ 4 04-page257 | |
| Failed free-wheel on a 25 HP model and the need for a modified design. | 2nd Jul 1930 | Box 6 \ 4 04-page258 | |
| Gearbox support for the 20/25 HP model, focusing on tube clearances. | 25th Jul 1930 | Box 6 \ 4 04-page259 | |
| Reminding a colleague to write a note regarding 'Silent Third Gear' and considering the purchase of a Graham Paige car for evaluation. | 30th Jul 1930 | Box 6 \ 4 04-page260 | |
| Solutions for oil leakage from the back of 20/25 HP and 40/50 HP gearboxes. | 20th Aug 1930 | Box 6 \ 4 04-page261 | |
| Diagram of the 3rd motion shaft bearing housing and its oil return passage for a 40/50 HP chassis. | 26th Sep 1930 | Box 6 \ 4 04-page262 | |
| The urgent need to improve the 2nd and 3rd speed gears for the high-torque Phantom engine. | 22th Aug 1930 | Box 6 \ 4 04-page263 | |
| Demonstration and gearbox issues of competitor cars, the Graham Paige and Studebaker Commander. | 29th Aug 1930 | Box 6 \ 4 04-page264 | |
| Summary of the principles and schemes guiding the development of new gear change mechanisms. | 1st Sep 1930 | Box 6 \ 4 04-page265 | |
| Comparative analysis of spool gear, freewheel, and synchro-mesh gearbox systems from competing manufacturers. | 1st Sep 1930 | Box 6 \ 4 04-page266 | |
| Decision not to trial an epicyclic gear design and the difficulties of the car's development. | 1st Sep 1930 | Box 6 \ 4 04-page267 | |
| Development of a silent third gear and comparing car performance. | 30th Sep 1930 | Box 6 \ 4 04-page268 | |
| Various schemes and arrangements for a silent third gear gearbox. | 2nd Sep 1930 | Box 6 \ 4 04-page269 | |
| Comparison of the Graham Paige car with the Phantom II (26-EX) leading to a proposed experiment in engine construction. | 3rd Sep 1930 | Box 6 \ 4 04-page270 | |
| Scheme to address oil leakage from the back of 20/25 & 40/50 gearboxes. | 1st Sep 1930 | Box 6 \ 4 04-page271 | |
| Development direction of a silent third gear, specifically concerning the epicyclic gear design. | 28th Sep 1930 | Box 6 \ 4 04-page272 | |
| Proposed schemes for a silent third gear and an interim plan to fit a freewheel to a Phantom car. | 9th Sep 1930 | Box 6 \ 4 04-page273 | |
| The arrangement and testing of epicyclic trains for a 25HP epicyclic gearbox. | 25th Sep 1930 | Box 6 \ 4 04-page274 | |
| And comparing several different gearbox design schemes and proposals. | 1st Oct 1930 | Box 6 \ 4 04-page275 | |
| Evaluation of various gearbox and clutch systems, including epicyclic, spool, and synchronous mesh types. | 16th Oct 1930 | Box 6 \ 4 04-page276 | |
| Visit to West Wittering to discuss development schemes for an easy-change gearbox. | 16th Oct 1930 | Box 6 \ 4 04-page277 | |
| Gearbox from the U.S.A. and a scheme to fit Maybach type clutches. | 12th Oct 1930 | Box 6 \ 4 04-page278 | |
| Simpler schemes for easy gear changes in Phantom I and II models. | 23th Oct 1930 | Box 6 \ 4 04-page279 | |
| Differences in epicyclic gears and the fitting of Maybach clutches to the Phantom I gearbox. | 4th Oct 1930 | Box 6 \ 4 04-page280 | |
| Creation of a specimen epicyclic 3rd speed train for testing purposes. | 4th Oct 1930 | Box 6 \ 4 04-page281 | |
| Confirming drawings have been sent for a revised epicyclic 3rd speed gearbox intended for testing purposes. | 10th Oct 1930 | Box 6 \ 4 04-page282 | |
| Schemes related to a revised epicyclic three-speed gearbox. | 16th Oct 1930 | Box 6 \ 4 04-page283 | |
| Revised drawing for an epicyclic third gearbox, specifically regarding the movement of a joint. | 25th Oct 1930 | Box 6 \ 4 04-page284 | |
| Modification to the jaw clutches in a revised epicyclic third-speed gearbox. | 29th Oct 1930 | Box 6 \ 4 04-page285 | |
| Modification to the 1st speed dogs for the all-epicyclic gearbox. | 29th Oct 1930 | Box 6 \ 4 04-page286 | |
| The oil pump and lubrication arrangement for a revised epicyclic 3rd speed gearbox. | 31th Oct 1930 | Box 6 \ 4 04-page287 | |
| Revisions to the epicyclic 3rd speed gearbox. | 11th Nov 1930 | Box 6 \ 4 04-page288 | |
| Current position on change gear (gearbox) technology and various alternative schemes. | 3rd Nov 1930 | Box 6 \ 4 04-page289 | |
| Evaluation of different gearbox and transmission designs, including competitor analysis and historical development attempts. | 3rd Nov 1930 | Box 6 \ 4 04-page290 | |
| Design update memo regarding the development of a 3-speed pre-selector gearbox. | 4th Nov 1930 | Box 6 \ 4 04-page291 | |
| Modifications and additions to a revised epicyclic 3rd speed gearbox. | 4th Nov 1930 | Box 6 \ 4 04-page292 | |
| Revised epicyclic 3rd speed gearbox and a proposed 8.5 inch fabric coupling. | 7th Nov 1930 | Box 6 \ 4 04-page293 | |
| Modifications to the servo and brake arrangements for the revised epicyclic 3rd speed gearbox. | 1st Nov 1930 | Box 6 \ 4 04-page294 | |
| Revisions to the epicyclic 3rd speed gearbox, specifically regarding the inspection cover and vacuum cylinder. | 1st Nov 1930 | Box 6 \ 4 04-page295 | |
| Shortening the oil pump for the epicyclic 3rd speed gearbox. | 12th Nov 1930 | Box 6 \ 4 04-page296 | |
| Proposal for the assembly procedure of a revised epicyclic 3rd speed gearbox. | 12th Nov 1930 | Box 6 \ 4 04-page297 | |
| Design and testing of a new 25HP & 45HP epicyclic gearbox, considering helical versus straight gears for silent operation. | 20th Dec 1930 | Box 6 \ 4 04-page298 | |
| Work allocation for a steering column job related to a vacuum control pre-selection scheme. | 20th Dec 1930 | Box 6 \ 4 04-page299 | |
| Departmental memo discussing the positioning of speed and brake levers on the B-type steering column. | 28th Jun 1911 | Box 6 \ 5 05-page01 | |
| Suggestion for the position of the Change Speed Lever on the B type steering column. | 30th Jun 1911 | Box 6 \ 5 05-page02 | |
| Instruction regarding the cost of replacing worn change speed side levers. | 2nd Apr 1912 | Box 6 \ 5 05-page03 | |
| Instructions discussing a modification to a cross tube to compensate for wear on a lever. | 8th Aug 1910 | Box 6 \ 5 05-page04 | |
| Response from the Technical Committee regarding the design of a lever, comparing pull-on vs. push-on types. | 9th Jan 1913 | Box 6 \ 5 05-page05 | |
| Suggestion made by a driver for Mr. Ogden Codman. | 10th Jan 1912 | Box 6 \ 5 05-page06 | |
| Meeting minute discussing a suggestion to change the hand brake lever from a pull-on to a push-on design. | 12th Jan 1912 | Box 6 \ 5 05-page07 | |
| | | | |
