| Description | Date | Identifier | |
| Letter from the Telephone Manufacturing Company proposing the Laryngaphone for communication in noisy engine test sheds. | 8th Aug 1929 | Box 15 \ 6 Scan083 | |
| Stancliffe Oil Cooler, made by Reavells, to be viewed at the Shipping Exhibition. | 10th Sep 1929 | Box 15 \ 6 Scan084 | |
| Brochure detailing the features, advantages, and applications of the Stancliffe Heat Interchanger for oil cooling. | 11th Sep 1923 | Box 15 \ 6 Scan085 | |
| Explanatory document for the Stancliffe Heat Interchanger for oil cooling, detailing its principles and performance. | 13th Sep 1929 | Box 15 \ 6 Scan086 | |
| Letter from Simms Motor Units Ltd. proposing their magnetic oil filters for gearboxes and sending a sample for testing. | 13th Sep 1929 | Box 15 \ 6 Scan087 | |
| Letter from Simms Motor Units, Ltd. regarding the supply and application of filters for chassis, including pricing. | 13th Sep 1929 | Box 15 \ 6 Scan088 | |
| Suggested modification to a gear-box design to incorporate a Simms magnetic oil filter. | 23th Apr 1929 | Box 15 \ 6 Scan089 | |
| The reverse side of a folded document showing various receiving and office stamps. | 14th Sep 1929 | Box 15 \ 6 Scan090 | |
| Properties and recommended uses of 'LINATEX' crepe rubber for damping vibration and noise. | 26th Aug 1929 | Box 15 \ 6 Scan091 | |
| Letter from H. A. Moore & Company Ltd. offering a sample of their Tropic-Aire product for testing and installation. | 17th Dec 1929 | Box 15 \ 6 Scan092 | |
| Promotional brochure for the Tropic-Aire hot water automobile heater. | 18th Dec 1929 | Box 15 \ 6 Scan093 | |
| Letter from Delaunay Belleville Motors regarding their patented Spring Hanger Shackle for eliminating wheel wobble. | 18th Dec 1929 | Box 15 \ 6 Scan094 | |
| Letter to Delaunay Belleville Motors Ltd. declining interest in a spring hangar shackle. | 23th Dec 1929 | Box 15 \ 6 Scan095 | |
| Letter from Venesta Limited enclosing a sample of aluminium PLYMAX material for car dashboards. | 24th Jan 1930 | Box 15 \ 6 Scan096 | |
| Cover note for a letter and N.P.L. report concerning 'Holdfast Liquid Jointing' from Automotive Spares Limited. | 1st Jan 1930 | Box 15 \ 6 Scan097 | |
| Copy of a letter from Automotive Spares Limited promoting Bailey's Holdfast Liquid Jointing. | 31th Dec 1929 | Box 15 \ 6 Scan098 | |
| Cover note forwarding a leaflet about Moriscot Petrolifts to the Aircraft Department. | 3rd Jan 1930 | Box 15 \ 6 Scan099 | |
| Letter from Moriscot Petrolifts describing a new electrically operated plunger pump for fuel delivery. | 31th Dec 1929 | Box 15 \ 6 Scan100 | |
| Advertisement for the Moriscot Petrolift liquid fuel pump. | 5th May 1930 | Box 15 \ 6 Scan101 | |
| Letter from Moriscot Petrolifts regarding the development and features of their liquid fuel pumps. | 5th May 1930 | Box 15 \ 6 Scan102 | |
| Letter from Moriscot Petrolifts detailing the advantages of their new fuel pump. | 5th May 1930 | Box 15 \ 6 Scan103 | |
| Person pouring fluid into the Autovac fuel feed system in an engine bay. | 28th May 1930 | Box 15 \ 6 Scan104 | |
| The attached description of the Weller Steering Gear and related correspondence. | 28th May 1930 | Box 15 \ 6 Scan105 | |
| Letter to The Weller Steering Gear Co. regarding their steering gear description. | 28th May 1930 | Box 15 \ 6 Scan106 | |
| Letter from The Weller Steering Gear Co. regarding a proposal for their unique steering gear. | 27th May 1930 | Box 15 \ 6 Scan107 | |
| Notes on the design and production of the Weller low pressure steering gear, outlining five key conditions for its success. | 27th May 1930 | Box 15 \ 6 Scan108 | |
| The design, characteristics, and anti-wear qualities of a steering gear. | 27th May 1930 | Box 15 \ 6 Scan109 | |
| Description of wear adjustment, load distortion, and durability for a gear mechanism. | 27th May 1930 | Box 15 \ 6 Scan110 | |
| Production methods and materials for a new flexible gear design. | 27th May 1930 | Box 15 \ 6 Scan111 | |
| The design and features of vehicle controls, including throttle, ignition, and Lucas electric headlamps. | 27th May 1930 | Box 15 \ 6 Scan112 | |
| Comparison of loads on the working faces of a proprietary steering gear and its equivalent Weller gear. | 27th May 1930 | Box 15 \ 6 Scan113 | |
| Diagram illustrating the method for pressing in half ball elements for a Weller Steering Gear. | 27th May 1930 | Box 15 \ 6 Scan114 | |
| Assembly drawing for a Type 2 3/4 inch Weller steering gear. | 16th Jul 1930 | Box 15 \ 6 Scan115 | |
| Sample of pads made from wood impregnated with synthetic resin, intended for fixing between axles and springs. | 16th Jul 1930 | Box 15 \ 6 Scan116 | |
| Letter from an engineer proposing a patented multi-sign direction indicator for manufacture. | 30th Jul 1930 | Box 15 \ 6 Scan117 | |
| Description of a vehicle indicator system using two rotating barrels with signs to be displayed at the front and back of a vehicle. | 17th Mar 1930 | Box 15 \ 6 Scan118 | |
| Letter discussing the Godward Gas Generator, or Fuel Vaporizer, and suggesting an investigation into its technology. | 17th Mar 1930 | Box 15 \ 6 Scan119 | |
| Graph of dynamometer test results for a Type R.A.A. engine comparing standard equipment with a Godward Gas Generator. | 17th Mar 1930 | Box 15 \ 6 Scan120 | |
| Dynamometer test results for a Type RA4 engine, comparing standard equipment with a Godward Gas Generator. | 12th Nov 1929 | Box 15 \ 6 Scan121 | |
| Blueprint graph of dynamometer tests on a high compression engine comparing gasoline fuel and furnace oil. | 12th Nov 1929 | Box 15 \ 6 Scan122 | |
| Dynamometer test results for a Type R44 (High Compression) engine using gasoline and furnace oil with a Godward Gas Generator. | 12th Nov 1929 | Box 15 \ 6 Scan123 | |
| Performance graph of a Ford Model A engine showing Brake Horse Power and fuel consumption versus RPM. | 12th Nov 1929 | Box 15 \ 6 Scan124 | |
| Performance graph of a Ford Model A engine equipped with a Godward Gas Generator, comparing two different carburetor setups. | 12th Nov 1929 | Box 15 \ 6 Scan125 | |
| Performance graph of a Ford 'Model A' Engine with a Godward Gas Generator using 'Pyro' Alcohol fuel. | 12th Nov 1929 | Box 15 \ 6 Scan126 | |
| Abstract of data from tests of a Ford Model A engine equipped with a Godward Gas Generator. | 25th Nov 1929 | Box 15 \ 6 Scan127 | |
| Abstract of data from tests of a Ford 'Model A' engine. | 25th Nov 1929 | Box 15 \ 6 Scan128 | |
| New combined Thermometer and Oil Pressure gauge from the Accurate Recording Instrument Company. | 6th Oct 1930 | Box 15 \ 6 Scan129 | |
| Rejecting a submitted duplex instrument with dual registrations as it is too difficult to read. | 7th Oct 1930 | Box 15 \ 6 Scan130 | |
| Modified form of attachment for brake shoes by Lake & Elliott. | 28th Oct 1930 | Box 15 \ 6 Scan131 | |
| Rejecting a proposed blueprint for a modified brake shoe adjustment from Messrs Lake & Elliott. | 5th Nov 1930 | Box 15 \ 6 Scan132 | |
| Letter from the Chief Engineer of the Chassis Division in Springfield to Mr. Hives in Derby regarding a floating oil intake idea. | 13th Apr 1931 | Box 15 \ 6 Scan133 | |
| Promotional leaflet and sales letter for a 'FLOAT-O' variable level oil intake system. | 6th Apr 1931 | Box 15 \ 6 Scan134 | |
| Promotional document explaining the 'Float-O' variable level oil intake system and its benefits. | 15th Apr 1931 | Box 15 \ 6 Scan135 | |
| Forwarding a letter from Coopers Mechanical Joints Ltd. regarding their 'Linertite' gland packing product. | 15th Apr 1931 | Box 15 \ 6 Scan136 | |
| Letter from Coopers Mechanical Joints Ltd. regarding a new packing gland material called 'Linertite' for wet liners. | 13th Apr 1931 | Box 15 \ 6 Scan137 | |
| Patented Countersunk Riveting Process offered by the De Bergue Company of Manchester. | 22th Apr 1931 | Box 15 \ 6 Scan138 | |
| Requesting an enquiry into a device proposed by D. Henderson following wild assertions. | 29th Apr 1931 | Box 15 \ 6 Scan139 | |
| Letter proposing the trial of a new fuel-saving and power-increasing device for motors. | 27th Apr 1931 | Box 15 \ 6 Scan140 | |
| Letter requesting further particulars of an instrument for saving on petrol consumption of motor cars. | 6th May 1931 | Box 15 \ 6 Scan141 | |
| Sg. to Hs. regarding a letter received from Messrs. Dashwood & Partners Ltd. | 4th Dec 1931 | Box 15 \ 6 Scan142 | |
| Letter from Dashwood & Partners Ltd. proposing an anti-skid and stabilising device for heavy vehicles. | 3rd Dec 1931 | Box 15 \ 6 Scan143 | |
| Page 2 of a copy of a letter from Dashwood & Partners Ltd. regarding a device. | 17th Dec 1931 | Box 15 \ 6 Scan144 | |
| Follow-up request for a decision on 'Lumen' piston ring pliers to inform the inventor. | 17th Dec 1931 | Box 15 \ 6 Scan145 | |
| Declining interest in 'Lumen' brand piston ring pliers. | 21th Dec 1931 | Box 15 \ 6 Scan146 | |
| Copy of a letter from Giffen's (London) Limited concerning an anti-glare car accessory called Visorettes. | 22th Dec 1931 | Box 15 \ 6 Scan147 | |
| Declining to purchase a sample of 'Visorettes' and requesting instructions for its return. | 28th Dec 1931 | Box 15 \ 6 Scan148 | |
| Letter from Dashwood & Partners Ltd. proposing a trial of a new stabilifying device. | 29th Dec 1931 | Box 15 \ 6 Scan149 | |
| Article from Motor Transport magazine detailing a new German anti-skid and stabilising device. | 22th Dec 1930 | Box 15 \ 6 Scan150 | |
| Article from 'Bus & Coach' journal on a German anti-skid stabilising device, attached to a Dutch newspaper clipping covering a demonstration of the same apparatus. | 1st Jan 1931 | Box 15 \ 6 Scan151 | |
| German language document explaining the causes of vehicle skidding and introducing the 'Schleuderfrei' anti-skid device. | 1st Jan 1931 | Box 15 \ 6 Scan152 | |
| Technical explanation of the causes of skidding in motor vehicles. | 1st Jan 1931 | Box 15 \ 6 Scan153 | |
| Analysis of the various causes of vehicle skidding, with a focus on uneven wheel pressure resulting from centrifugal forces. | 1st Jan 1931 | Box 15 \ 6 Scan154 | |
| Explaining the causes of skidding with a flowchart, and detailing the construction and operation of the 'Stabifix' gear for its prevention. | 1st Jan 1931 | Box 15 \ 6 Scan155 | |
| The features and benefits of the Stabifix device, focusing on its anti-skid, springing, shock-absorbing, and spring-saving capabilities. | 1st Jan 1931 | Box 15 \ 6 Scan156 | |
| The benefits of the Stabifix device, including its performance with broken springs, tyre saving properties, and anti-skidding capabilities. | 1st Jan 1931 | Box 15 \ 6 Scan157 | |
| Explanatory notes on the distribution of stresses for the 'Stabifix' shock absorber system. | 1st Jan 1931 | Box 15 \ 6 Scan158 | |
| Page of calculations for moments of torsion and stress on a 'Stabifix' component. | 1st Jan 1931 | Box 15 \ 6 Scan159 | |
| Series of free-body diagrams illustrating forces and moments on mechanical systems. | 1st Jan 1931 | Box 15 \ 6 Scan160 | |
| Hand-drawn sketch of a simple lever or linkage mechanism. | 30th Dec 1931 | Box 15 \ 6 Scan161 | |
| Letter declining to test the Schlenderfrei Stabiliser, citing insufficient benefits compared to its weight, cost, and space. | 30th Dec 1931 | Box 15 \ 6 Scan162 | |
| Letter proposing a patented arrangement for controlling an engine's warming-up period. | 11th Jan 1932 | Box 15 \ 6 Scan163 | |
| Letter discussing engine warm-up methods, comparing thermostatic control with an exhaust heated hot spot. | 1st Mar 1932 | Box 15 \ 6 Scan164 | |
| Page two of a letter discussing engine cold start procedures and lubrication. | 15th Mar 1932 | Box 15 \ 6 Scan165 | |
| Letter from Wilcot (Parent) Co., Ltd. proposing a new flashing direction indicator for vehicles. | 15th Mar 1932 | Box 15 \ 6 Scan166 | |
| The use and legal requirements for direction indicators on motor vehicles in continental Europe. | 16th Mar 1932 | Box 15 \ 6 Scan167 | |
| Potential trial of a 'Thermova' device for automatically cutting off petrol supply during a fire. | 16th Mar 1932 | Box 15 \ 6 Scan168 | |
| Description of the 'Thermov'a automatic petrol shut-off device for fire prevention. | 28th Apr 1932 | Box 15 \ 6 Scan169 | |
| Covering letter regarding experimental water clips received from an ex-Air Force individual. | 28th Apr 1932 | Box 15 \ 6 Scan170 | |
| Letter concerning the supply and potential manufacture of 'P.C.' type clips. | 27th Apr 1932 | Box 15 \ 6 Scan171 | |
| Rejecting sample water clips as inferior to the current 'Jubilee' standard. | 30th Apr 1932 | Box 15 \ 6 Scan172 | |
| Requesting the location of a misplaced Austro Daimler patent specification and an accompanying letter. | 14th Jun 1932 | Box 15 \ 6 Scan173 | |
| Submission for a 'Baxter' link connecting rod and questioning its claimed efficiency improvements. | 30th Aug 1932 | Box 15 \ 6 Scan174 | |
| Credibility of a statement made by Prof. Lloyd-Evans concerning the 'Baxter' Link Con-rod. | 1st Sep 1932 | Box 15 \ 6 Scan175 | |
| Brief memo acknowledging a previous communication regarding the 'BAXTER' LINK CON-ROD. | 5th Sep 1932 | Box 15 \ 6 Scan176 | |
| Private memo outlining the company's policy on patenting employee ideas. | 24th Sep 1932 | Box 15 \ 6 Scan177 | |
| Testing modified clutches and patenting an improved actuating mechanism. | 4th Oct 1932 | Box 15 \ 6 Scan178 | |
| Description of a semi-hydraulic brake system for motor cars, submitted for patent purposes. | 5th Oct 1932 | Box 15 \ 6 Scan179 | |
| Design progress on a semi-expanding carburetter and shock dampers. | 26th Oct 1932 | Box 15 \ 6 Scan180 | |
| New automatic oil control system and a novel hydraulic brake system for a Bensport model. | 10th Oct 1932 | Box 15 \ 6 Scan181 | |
| Clutch actuation and future gearbox development, including epicyclic gears for the 'Spectre' project. | 10th Oct 1932 | Box 15 \ 6 Scan182 | |
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