| Description | Date | Identifier | |
| The requirements, advantages, and disadvantages of torsion bar suspension systems, with references to other manufacturers. | 28th Mar 1939 | Box 154a \ 2 scan0056 | |
| Letter apologising for postponing a meeting due to a friend's motor accident and suggesting to reschedule. | 28th Mar 1939 | Box 154a \ 2 scan0057 | |
| Letter to Toledo Woodhead Springs Ltd. requesting a pair of springs and acknowledging a delay due to steel supply. | 30th Mar 1939 | Box 154a \ 2 scan0058 | |
| Critique of the Packard suspension system, comparing its weight and performance to the company's own Wraith suspension. | 31th Mar 1939 | Box 154a \ 2 scan0059 | |
| Responding to criticisms on vehicle design, comparing noise, suspension, handling, and costs across different models. | 31th Mar 1939 | Box 154a \ 2 scan0060 | |
| Summary of views on the present position of the rationalised suspension and its future development. | 31th Mar 1939 | Box 154a \ 2 scan0061 | |
| Weight breakdown of front suspension components for the Bentley V and Wraith III models. | 29th Mar 1939 | Box 154a \ 2 scan0062 | |
| Information regarding the rating of 'silentbloc' bushes before and after use. | 3rd Apr 1939 | Box 154a \ 2 scan0063 | |
| Letter from the Experimental Department to The Cloudsley Engineering Co. Ltd. regarding drawing No.0/700 for time lag damping. | 3rd Apr 1939 | Box 154a \ 2 scan0064 | |
| Road spring data for a Humber Super Snipe car, detailing suspension types and loads. | 3rd Apr 1939 | Box 154a \ 2 scan0065 | |
| Specification sheet detailing spring rates, wheel movements, and spring hysteresis. | 3rd Apr 1939 | Box 154a \ 2 scan0066 | |
| Letter from West Ham Oil Co. Ltd. promoting a new penetrating grease for vehicle springs. | 3rd Apr 1939 | Box 154a \ 2 scan0067 | |
| The second page of a typed letter from West Ham Oil Co., Ltd, signed by a director. | 4th Apr 1939 | Box 154a \ 2 scan0068 | |
| Letter from Enwood Steel Products Ltd. to W.A. Robotham regarding a previous letter and wishing a friend well. | 4th Apr 1939 | Box 154a \ 2 scan0069 | |
| Graph comparing the load versus deflection ratings for new Silentbloc bushes against those after 50 hours of bumping. | 4th Apr 1939 | Box 154a \ 2 scan0070 | |
| Letter from the Experimental Department confirming a visit to Thos. Firth & John Brown Ltd. | 4th Apr 1939 | Box 154a \ 2 scan0071 | |
| Letter confirming a telephone conversation and a planned visit to Toledo Woodhead Springs Ltd. | 4th Apr 1939 | Box 154a \ 2 scan0072 | |
| Letter to West Ham Oil Co. Ltd. regarding their penetrating grease product. | 12th Apr 1939 | Box 154a \ 2 scan0073 | |
| Telex message arranging for an Oyston Comparator to be brought to a meeting. | 13th Apr 1939 | Box 154a \ 2 scan0074 | |
| Order for Spaldite spring interleaving for leaf springs. | 13th Apr 1939 | Box 154a \ 2 scan0075 | |
| Letter to Toledo Woodhead Springs Ltd. about despatching samples of interleaving, shackle pins, bushes, and a Bijur pump. | 13th Apr 1939 | Box 154a \ 2 scan0076 | |
| Dimensions for spring interleaving. | 13th Apr 1939 | Box 154a \ 2 scan0077 | |
| Request to send an official order for a pair of B.V. rear road springs. | 14th Apr 1939 | Box 154a \ 2 scan0078 | |
| Requesting the dispatch of various Bentley V parts to Toledo Woodheads Springs Ltd. | 15th Apr 1939 | Box 154a \ 2 scan0079 | |
| Letter from Du Pont regarding a sample of 'Orel'. | 17th Apr 1939 | Box 154a \ 2 scan0080 | |
| Request to dispatch two Luvax dampers to The Cloudsley Engineering Co. | 17th Apr 1939 | Box 154a \ 2 scan0081 | |
| Letter from The Cloudsley Engineering Company regarding the fitting and testing of Luvax shock-absorbers and an Oyston Suspension Comparator. | 18th Apr 1939 | Box 154a \ 2 scan0082 | |
| Letter from The Cloudsley Engineering Company Ltd. offering a further demonstration of their Comparator for long wheel-base cars. | 18th Apr 1939 | Box 154a \ 2 scan0083 | |
| Letter to Cloudsley Engineering Co. Ltd. regarding Luvax P./ dampers and an Oyston comparator. | 18th Apr 1939 | Box 154a \ 2 scan0084 | |
| Correspondence with The Cloudsley Engineering Co. Ltd. regarding instrument records, Luvax dampers and valves. | 20th Apr 1939 | Box 154a \ 2 scan0085 | |
| Letter from The Cloudsley Engineering Company regarding a trial of modified Luvax shock-absorbers. | 21th Apr 1939 | Box 154a \ 2 scan0086 | |
| Letter from Ferodo Limited discussing experiments on self-servo action and spring interleaving. | 22th Apr 1939 | Box 154a \ 2 scan0087 | |
| Letter from The Pyrene Company Limited concerning the Parkerizing rust-proofing process. | 27th Apr 1939 | Box 154a \ 2 scan0088 | |
| Letter from Marconi-Ekco Instruments Ltd. promoting an integrating accelerometer, named 'The Automatic Passenger', for measuring car ride comfort. | 2nd May 1939 | Box 154a \ 2 scan0089 | |
| The Integrating Accelerometer Type TF. 414 for determining vehicle riding comfort. | 1st Apr 1938 | Box 154a \ 2 scan0090 | |
| Specification sheet for the TYPE TF.414 Integrating Accelerometer. | 3rd May 1939 | Box 154a \ 2 scan0091 | |
| Letter to E.I. Du Pont De Nemours & Co. requesting the purpose and a sample of 'Orel' rubber lubricant. | 3rd May 1939 | Box 154a \ 2 scan0092 | |
| Letter to The Pyrene Co. Ltd. regarding the treatment of coil springs, specifically Parkerizing versus Cadmium plating. | 3rd May 1939 | Box 154a \ 2 scan0093 | |
| Luvax Dampers sent to Cloudsley Engineering Co. for a special valve assembly fitting. | 3rd May 1939 | Box 154a \ 2 scan0094 | |
| Letter confirming the durability of modified springs and requesting new spring designs for trial. | 8th May 1939 | Box 154a \ 2 scan0095 | |
| Letter to Ferodo Ltd. explaining a delay in testing the interleaving of leaf springs due to unsatisfactory bump test conditions. | 8th May 1939 | Box 154a \ 2 scan0096 | |
| To order one pair of front road springs for chassis PB.4813. | 8th May 1939 | Box 154a \ 2 scan0097 | |
| Internal request to place an order for two pairs of experimental B.V. rear road springs. | 8th May 1939 | Box 154a \ 2 scan0098 | |
| Letter from DuPont to the Experimental Department regarding a sample of 'OREL' rubber lubricant for evaluation. | 9th May 1939 | Box 154a \ 2 scan0099 | |
| Letter from E.I. du Pont de Nemours & Co. regarding a new rubber lubricant called 'Orel' for testing. | 1st Mar 1939 | Box 154a \ 2 scan0100 | |
| Letter providing detailed information on the properties, application, and limitations of a penetrating lubricant named 'Orel'. | 1st Mar 1939 | Box 154a \ 2 scan0101 | |
| Advertisement leaflet for Du Pont 'OREL' lubricant for rubber parts and chassis bearings. | 1st Mar 1939 | Box 154a \ 2 scan0102 | |
| Promotional leaflet for 'OREL', a penetrating anti-squeak lubricant for motor car chassis. | 1st Mar 1939 | Box 154a \ 2 scan0103 | |
| Promotional news bulletin for automotive jobber representatives announcing 'OREL', a new non-petroleum lubricant from Du Pont. | 1st Mar 1939 | Box 154a \ 2 scan0104 | |
| Advertisement for DuPont 'OREL' anti-squeak lubricant for chassis parts. | 11th May 1939 | Box 154a \ 2 scan0105 | |
| Letter to a supplier discussing the use of rubber bearings and potential noise issues compared to 'Silentbloc' bearings. | 11th May 1939 | Box 154a \ 2 scan0106 | |
| Letter to Messrs. E.I. du Pont de Nemours & Co. regarding a rubber lubricant sample. | 9th May 1939 | Box 154a \ 2 scan0107 | |
| Causes of leaf spring failures and comparing stress data between B.V. and 25/30 models. | 13th May 1939 | Box 154a \ 2 scan0108 | |
| Stress tests and modifications made to leaf springs to improve life and safety factor. | 13th May 1939 | Box 154a \ 2 scan0109 | |
| Graph showing stress analysis for the main leaf of a BV road spring under oscillation. | 17th May 1939 | Box 154a \ 2 scan0110 | |
| Letter to British Tyre & Rubber Co. Ltd. regarding plates and requesting a drawing number for buffers. | 17th May 1939 | Box 154a \ 2 scan0111 | |
| Covering order for 12 experimental front buffers. | 17th May 1939 | Box 154a \ 2 scan0112 | |
| Letter from supplier Toledo Woodhead Springs Ltd. offering to supply sample springs from a new material supply. | 23th May 1939 | Box 154a \ 2 scan0113 | |
| Instruction to use lightened lower suspension levers for specific vehicle models. | 27th May 1939 | Box 154a \ 2 scan0114 | |
| Letter from the Experimental Department to The Cloudsley Engineering Co. Ltd. regarding Luvax dampers. | 2nd Jun 1939 | Box 154a \ 2 scan0115 | |
| Letter from Toledo Woodhead Springs enclosing details of Cadillac Coil and Laminated Springs. | 6th Jun 1939 | Box 154a \ 2 scan0116 | |
| Letter from The Cloudsley Engineering Company regarding parts for Luvax dampers and a Proportional Damping System. | 7th Jun 1939 | Box 154a \ 2 scan0117 | |
| Quotation for springs from Toledo Woodhead Springs Limited. | 9th Jun 1939 | Box 154a \ 2 scan0118 | |
| Production and dispatch of blueprints for front wheel spring suspension triangle levers for the Silver Ripple. | 9th Jun 1939 | Box 154a \ 2 scan0119 | |
| Letter comparing the durability of two types of 9-leaf road springs and providing thickness specifications. | 12th Jun 1939 | Box 154a \ 2 scan0120 | |
| Page 2 of a letter to Messrs. Thos. Firth & John Brown Ltd regarding an order. | 12th Jun 1939 | Box 154a \ 2 scan0121 | |
| Letter from Toledo Woodhead Springs Ltd. regarding the type of interleaf for an order of springs. | 15th Jun 1939 | Box 154a \ 2 scan0122 | |
| Telegram ordering six lengths of Spauldite interleaving for springs. | 19th Jun 1939 | Box 154a \ 2 scan0123 | |
| Letter from a supplier, Spauldings Ltd, regarding a delay in supplying Spauldite interleaving strips. | 19th Jun 1939 | Box 154a \ 2 scan0124 | |
| Requesting a covering order for pieces of Spaldite for spring interleaving. | 20th Jun 1939 | Box 154a \ 2 scan0125 | |
| Letter to Spauldings Ltd. chasing an urgent order for Spauldite interleaving material for spring testing. | 20th Jun 1939 | Box 154a \ 2 scan0126 | |
| Inquiry to Howard Graham Ltd. providing specifications for replacement Harris Flexible Bearings for a yoke piece and anti-roll stabilizer. | 21th Jun 1939 | Box 154a \ 2 scan0127 | |
| Letter to Howard Graham Ltd. regarding the design specifications for a roll rod rubber bush. | 21th Jun 1939 | Box 154a \ 2 scan0128 | |
| Telegram received by telephone from Spaulding's regarding the availability of 48 inch length interleaving stock. | 22th Jun 1939 | Box 154a \ 2 scan0129 | |
| Telegram to Vulcafibra-Phone London regarding an order for 48 inch pieces. | 22th Jun 1939 | Box 154a \ 2 scan0130 | |
| Request for a quotation sent to Messrs. Ferodo Ltd. for rubberised fabric spring seating washers. | 22th Jun 1939 | Box 154a \ 2 scan0131 | |
| Letter from Spauldings Ltd regarding supply difficulties with full-length sheets of Spauldite material. | 22th Jun 1939 | Box 154a \ 2 scan0132 | |
| Letter from Spaulding's Ltd. confirming the despatch of a Spauldite strip. | 23th Jun 1939 | Box 154a \ 2 scan0133 | |
| Letter from Howard Graham Ltd. regarding suggestions for 'Harris' flexible bearing applications. | 24th Jun 1939 | Box 154a \ 2 scan0134 | |
| Letter to Leys Malleable Iron Castings Ltd. regarding an order for torque arms in malleable iron and 'Lepaz 35'. | 26th Jun 1939 | Box 154a \ 2 scan0135 | |
| Letter from Toledo Woodhead Springs regarding a sample of 'Interleaving' material for leaf springs and its test results. | 26th Jun 1939 | Box 154a \ 2 scan0136 | |
| Request to the Pattern Shop to create two wooden packing pieces for a coil spring rear suspension. | 28th Jun 1939 | Box 154a \ 2 scan0137 | |
| Letter to Toledo Woodhead Springs Ltd. regarding spring failures and an urgent order for Bentley cars. | 29th Jun 1939 | Box 154a \ 2 scan0138 | |
| Letter to Toledo Woodhead Springs Ltd. regarding the ordering and supply of various types of springs. | 29th Jun 1939 | Box 154a \ 2 scan0139 | |
| Letter to Tecalemit Ltd. regarding the failure of Oscillith bushes and switching to Harris bushes. | 3rd Jul 1939 | Box 154a \ 2 scan0140 | |
| Letter from Tecalemit Limited acknowledging receipt of a confidential letter sent to them in error. | 4th Jul 1939 | Box 154a \ 2 scan0141 | |
| Covering order for bushes related to Harris Flexible Bearings. | 4th Jul 1939 | Box 154a \ 2 scan0142 | |
| Covering order for Silver Wraith rear springs from Messrs. Toledo Woodhead Ltd. | 4th Jul 1939 | Box 154a \ 2 scan0143 | |
| Letter to Howard Graham Ltd. regarding an order for Harris Flexible Bearings and bushes. | 4th Jul 1939 | Box 154a \ 2 scan0144 | |
| Request to Toledo Woodhead Springs Ltd. for the manufacture and supply of various deflection springs. | 4th Jul 1939 | Box 154a \ 2 scan0145 | |
| Letter to Howard Graham Ltd. regarding the use of Harris Flexible Bearings for a rear shock absorber linkage. | 4th Jul 1939 | Box 154a \ 2 scan0146 | |
| Typed letter detailing specifications for Bush B and Bush C, and proposing a scheme for using Harris bushes as oil seals and bearings in shock absorbers. | 4th Jul 1939 | Box 154a \ 2 scan0147 | |
| Letter from Howard Graham Ltd. acknowledging an order for No. 718 Bushes and No. CW.0719 Bushes. | 5th Jul 1939 | Box 154a \ 2 scan0148 | |
| Letter from the Experimental Department inquiring about purchasing an Olsen spring tester. | 6th Jul 1939 | Box 154a \ 2 scan0149 | |
| Letter from Edward G. Herbert Ltd. to the Experimental Dept. regarding an Olsen Spring Tester and the enclosed catalogue. | 7th Jul 1939 | Box 154a \ 2 scan0150 | |
| Stress levels and thickness variations in leaf springs. | 8th Jul 1939 | Box 154a \ 2 scan0151 | |
| Order for Bentley V. springs for production from Firth's. | 8th Jul 1939 | Box 154a \ 2 scan0152 | |
| Internal request to order one dozen pairs of 1050 lb. 7' deflection springs for Bentley V. production. | 8th Jul 1939 | Box 154a \ 2 scan0153 | |
| Order for specific rear springs for production Bentley V models. | 8th Jul 1939 | Box 154a \ 2 scan0154 | |
| Letter enclosing a quotation for American-built Olsen Spring Testing Machines due to long delivery times for British-built versions. | 12th Jul 1939 | Box 154a \ 2 scan0155 | |
| | | | |
