| Description | Date | Identifier | |
| Standardisation of the rear silencer swan neck, to avoid the use of steel castings. | 28th Oct 1920 | Box 171 \ 3 img073 | |
| Standardisation of steering pivot pins made with a slow taper for fitting to the axle. | 8th Nov 1920 | Box 171 \ 3 img074 | |
| Examining plain thrust washers to provide friction in steering on experimental cars. | 1st Nov 1920 | Box 171 \ 3 img075 | |
| Fitting a plain thrust washer to existing cars and a proposed design modification for pivot pins. | 4th Nov 1920 | Box 171 \ 3 img076 | |
| Standardisation of a plain thrust washer to replace a ball thrust on the off side of the steering pivot. | 5th Nov 1920 | Box 171 \ 3 img077 | |
| Examination of plain thrust washers to provide friction in steering on experimental cars. | 4th Nov 1920 | Box 171 \ 3 img078 | |
| Fitting plain thrust washers and modifying pivot pins. | 11th Nov 1920 | Box 171 \ 3 img079 | |
| Standardisation of a stainless steel low-speed jet spindle for the carburetter to prevent sticking. | 29th Jan 1921 | Box 171 \ 3 img080 | |
| Requesting the standardisation of the 40/50 HP carburetter low speed jet spindle in stainless steel due to a rusting issue. | 1st Jan 1921 | Box 171 \ 3 img081 | |
| Standardisation of the Low Speed Jet Spindle E.2691 from mild steel to stainless steel. | 27th Jan 1921 | Box 171 \ 3 img082 | |
| Standardisation of rear spring wearing plates fitted between the spring and roller to overcome a knock. | 11th Dec 1920 | Box 171 \ 3 img083 | |
| Customer complaints about a knocking sound from the rear springs and the proposed solution of fitting wearing plates. | 12th Dec 1920 | Box 171 \ 3 img084 | |
| Design modifications to the wearing plate on the rear spring. | 13th Dec 1920 | Box 171 \ 3 img085 | |
| Proposal for fixing brake brackets to axle tubes using bolts and solder instead of counterscrews and brazing. | 1st Mar 1921 | Box 171 \ 3 img086 | |
| Standardisation of a double thrust bearing for a rear axle pinion. | 8th Nov 1920 | Box 171 \ 3 img087 | |
| Necessity and implementation of a double thrust bearing for the rear axle pinion. | 5th Nov 1920 | Box 171 \ 3 img088 | |
| Standardisation of a thermometer for the chassis, made by the Foxborough Instrument Company, U.S.A. | 16th Mar 1921 | Box 171 \ 3 img089 | |
| Recommendation to use 'Foxboro' thermometers instead of 'Cambridge' thermometers for cars built in the U.S.A. | 16th Mar 1921 | Box 171 \ 3 img090 | |
| Standardisation of parts for the lubrication of the universal joint at the rear of the gear box. | 5th Apr 1921 | Box 171 \ 3 img091 | |
| Wear in the universal joint behind the gearbox for the 40/50 chassis due to insufficient lubrication. | 5th Apr 1921 | Box 171 \ 3 img092 | |
| Standardisation of Chassis Parts relating to gudgeon pins with locking screws which expand the end. | 18th Apr 1921 | Box 171 \ 3 img093 | |
| The problem of gudgeon pin knocks in test cars and a recommendation for a solution. | 18th Apr 1921 | Box 171 \ 3 img094 | |
| Standardisation of chassis parts, specifically Dunlop wheels with Goodyear demountable rims. | 20th Jun 1921 | Box 171 \ 3 img095 | |
| Standardisation of chassis parts concerning straight-sided tyres with cord fabric. | 20th Jun 1921 | Box 171 \ 3 img096 | |
| Standardisation of a longer chassis with a 6.5' wheelbase increase. | 13th Jul 1921 | Box 171 \ 3 img097 | |
| Proposal to make the longer type 40/50 chassis standard. | 12th Jul 1921 | Box 171 \ 3 img098 | |
| Standardisation of rear axle gears (14 x 52) to improve the performance of cars with heavy bodies. | 7th Jul 1921 | Box 171 \ 3 img099 | |
| Standardisation of chassis parts, specifically helical gears for old type 40/50 chassis. | 13th Jul 1921 | Box 171 \ 3 img100 | |
| The cost difference for fitting helical gears to old type 40/50 chassis. | 24th Aug 1921 | Box 171 \ 3 img101 | |
| Recommending the fitting of bronze helical gears to old type 40/50 chassis. | 12th Jul 1921 | Box 171 \ 3 img102 | |
| Standardisation proposal for a radiator support bracket, changing from forging to pressing to reduce cost. | 13th Sep 1921 | Box 171 \ 3 img103 | |
| Standardisation proposal for a strengthened rocker arm shaft for steering. | 19th Sep 1921 | Box 171 \ 3 img104 | |
| Standardisation report for a modification to the rear axle to allow the journal bearing to take reverse thrust from the Gleason Bevel Pinion. | 19th Sep 1921 | Box 171 \ 3 img105 | |
| Standardisation of chassis parts, replacing R-R grease caps with 'Enots' lubricators. | 19th Sep 1921 | Box 171 \ 3 img106 | |
| Standardisation proposal to replace mica insulated spark plugs with Lodge Steatite Plugs, model Z.22. | 31th Oct 1921 | Box 171 \ 3 img107 | |
| Standardisation of a rubber joint for the top and side water pipes to avoid leaks developing. | 31th Oct 1921 | Box 171 \ 3 img108 | |
| Standardisation of a reinforcing plate for fan blades to prevent them from breaking due to fatigue. | 2nd Nov 1921 | Box 171 \ 3 img109 | |
| Cost estimate for fitting reinforcing plates to a 40/50 chassis fan, with a handwritten breakdown of the labour involved. | 17th Nov 1921 | Box 171 \ 3 img110 | |
| Standardisation of chassis parts, specifically ground gears for the gearbox, to improve silence. | 23th Jan 1922 | Box 171 \ 3 img111 | |
| Standardisation of chassis parts, specifically 'Hartford' shock absorbers. | 14th Feb 1922 | Box 171 \ 3 img112 | |
| Standardisation of a pilot jet to replace the primer, operated from the instrument board. | 26th Jun 1922 | Box 171 \ 3 img113 | |
| Standardisation of a pilot jet to replace the primer, with feedback on its implementation and a handwritten cost-benefit analysis. | 26th Jun 1922 | Box 171 \ 3 img114 | |
| Cost of priming device parts to be superseded by a pilot jet. | 7th Jul 1922 | Box 171 \ 3 img115 | |
| Standardisation of a modification to the machining of the rear axle thrust housing to produce quieter axles. | 11th Aug 1922 | Box 171 \ 3 img116 | |
| Modification to the rear axle thrust housing, involving an alteration to its machining. | 11th Aug 1922 | Box 171 \ 3 img117 | |
| Lateral adjustment of a pinion on Gleason gears, with diagrams showing the pinion before and after adjustment. | 16th Mar 1922 | Box 171 \ 3 img118 | |
| Axle gear testing, detailing adjustments to reduce noise and improve pinion bedding and lubrication. | 11th Aug 1922 | Box 171 \ 3 img119 | |
| Standardisation of chassis parts report for a side filler for the petrol tank. | 11th Aug 1922 | Box 171 \ 3 img120 | |
| Recommendation to add a side filler to the petrol tank for the 40/50 chassis. | 11th Aug 1922 | Box 171 \ 3 img121 | |
| Standardisation document for Wefco type gaiters for road springs, intended to improve springing. | 12th Aug 1922 | Box 171 \ 3 img122 | |
| Cost increase for standardising chassis parts, specifically gaiters for road springs. | 19th Aug 1922 | Box 171 \ 3 img123 | |
| Standardisation of a crankcase vent to prevent fumes from entering vehicle bodies. | 4th Sep 1922 | Box 171 \ 3 img124 | |
| The standardisation of chassis parts, returning a costed sheet and noting an order for a die casting. | 8th Sep 1922 | Box 171 \ 3 img125 | |
| Standardisation of an exhaust heated throttle to improve running on low-grade petrol. | 8th Sep 1922 | Box 171 \ 3 img126 | |
| Standardisation of an exhaust heated throttle and the value of superseded parts. | 14th Sep 1922 | Box 171 \ 3 img127 | |
| Standardisation proposal for the deletion of security bolts for tyres. | 4th Sep 1922 | Box 171 \ 3 img128 | |
| Letter from Dunlop Rubber Co. regarding issues with security bolts on cord tyres. | 26th Jul 1922 | Box 171 \ 3 img129 | |
| Letter from Dunlop Rubber Co. Ltd. recommending the withdrawal of the stipulation for the use of security bolts with cord tyres. | 10th Aug 1922 | Box 171 \ 3 img130 | |
| Recommendation to abandon the use of security bolts for tyres, particularly cord tyres. | 10th Aug 1922 | Box 171 \ 3 img131 | |
| Use of security bolts with tyres, concluding they are not a guarantee and recommending their discontinuation. | 26th Jul 1922 | Box 171 \ 3 img132 | |
| Standardisation document concerning bushes for valve guides to reduce the cost of repairs. | 3rd Jul 1922 | Box 171 \ 3 img133 | |
| Cost implications of using die-cast valve guides for the 40/50 HP chassis. | 9th Aug 1922 | Box 171 \ 3 img134 | |
| Proposal to use detachable bushes for valve guides on the 40/50 engine to simplify maintenance and reduce costs. | 10th Aug 1922 | Box 171 \ 3 img135 | |
| Cost implications of a modification to the machining of the rear axle thrust housing. | 12th Aug 1922 | Box 171 \ 3 img136 | |
| Standardisation report for a Ferodo strip for the bonnet rest to prevent wear and rattles. | 5th Sep 1922 | Box 171 \ 3 img137 | |
| Standardisation of Chassis Parts report for a petrol level indicator Tele-Gauge. | 2nd Oct 1922 | Box 171 \ 3 img138 | |
| Standardisation document for fitting Gleason gears to axles on chassis prior to the 1700 series. | 3rd Nov 1922 | Box 171 \ 3 img139 | |
| Cost analysis for fitting Gleason gears to axles on chassis prior to number 1700. | 13th Nov 1922 | Box 171 \ 3 img140 | |
| Standardisation document for fitting handles to bonnets. | 19th Sep 1922 | Box 171 \ 3 img141 | |
| Standardisation of chassis parts, specifically fixing gudgeon pin bushes in the connecting rod to reduce wear. | 21th Nov 1922 | Box 171 \ 3 img142 | |
| Standardisation of a Schrader tyre pressure gauge to be provided with every 40/50 and Goshawk car. | 16th Nov 1922 | Box 171 \ 3 img143 | |
| Standardisation of the spring for closing the main throttle when a starter carburetter is fitted for the 40/50 model. | 6th Dec 1922 | Box 171 \ 3 img144 | |
| Standardisation sheet for the spring for closing the main throttle. | 29th Dec 1922 | Box 171 \ 3 img145 | |
| Proposal to replace the standard torsional spring with an extension spring for closing the main throttle. | 12th Dec 1922 | Box 171 \ 3 img146 | |
| Standardisation of a leather flap for pedal slots to reduce heat and smell. | 22th Jan 1923 | Box 171 \ 3 img147 | |
| Standardising a leather flap over pedal slots to reduce heat under the scuttle on the 40/50 Chassis. | 1st Jan 1923 | Box 171 \ 3 img148 | |
| Standardisation of chassis parts for a spare wheel carrier in the side position. | 30th Jan 1923 | Box 171 \ 3 img149 | |
| Standardisation proposal for removing the end threads from piece No. 3233.A. | 12th Feb 1923 | Box 171 \ 3 img150 | |
| Standardisation of chassis parts report for the Crick Valve Lifter. | 15th Jan 1923 | Box 171 \ 3 img151 | |
| Standardisation document for a bracket for the swan-neck exhaust pipe. | 12th Feb 1923 | Box 171 \ 3 img152 | |
| Standardisation report for a modified valve spring washer. | 20th Feb 1923 | Box 171 \ 3 img153 | |
| Cover memo for a standardisation sheet concerning modified valve spring washers. | 5th Mar 1925 | Box 171 \ 3 img154 | |
| Blueprint showing a cross-section of a mechanical component. | 5th Mar 1925 | Box 171 \ 3 img155 | |
| Blueprint showing a cross-sectional view of a mechanical component. | 5th Mar 1925 | Box 171 \ 3 img156 | |
| Blueprint of a proposed new washer for the 40/50 valve spring. | 2nd Mar 1923 | Box 171 \ 3 img157 | |
| Blueprint diagram detailing standard washers. | 2nd Mar 1923 | Box 171 \ 3 img158 | |
| Standardisation proposal for a light pressed cover on the central bearing of the rear spring. | 9th Mar 1923 | Box 171 \ 3 img159 | |
| Standardisation proposal for a light pressed cover on the central bearing of the rear spring. | 28th Feb 1923 | Box 171 \ 3 img160 | |
| Blueprint showing a cross-section of a machined part with dimensional annotations. | 3rd May 1921 | Box 171 \ 3 img161 | |
| Blueprint detailing a machined component with manufacturing operations and dimensions. | 3rd May 1921 | Box 171 \ 3 img162 | |
| Process sheet for a sand casting, detailing the pattern number and machining operations. | 3rd May 1921 | Box 171 \ 3 img163 | |
| Blueprint detailing the dimensions and specifications for a component with cut-out lettering. | 3rd May 1921 | Box 171 \ 3 img164 | |
| Blueprint detailing the cross-section and dimensions of a rivetted oil and splash guard. | 3rd May 1921 | Box 171 \ 3 img165 | |
| Blueprint showing a cross-section of a threaded mechanical component with dimensions. | 18th May 1925 | Box 171 \ 3 img166 | |
| Blueprint for a cover for the top of a gear box. | 18th May 1925 | Box 171 \ 3 img167 | |
| Blueprint showing a cross-sectional view with measurements. | 31th May 1925 | Box 171 \ 3 img168 | |
| Folded blueprint cover showing section and reference markings. | 30th May 1923 | Box 171 \ 3 img169 | |
| Standardisation of Chassis Parts document regarding fixing the radiator 1 inch higher. | 21th Mar 1923 | Box 171 \ 3 img170 | |
| Standardisation of the speedometer drive for the 40/50 chassis. | 21th Mar 1923 | Box 171 \ 3 img171 | |
| Returning a standardisation sheet with costs for a 1' higher radiator, detailing cost increases and savings. | 11th Apr 1923 | Box 171 \ 3 img172 | |
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