| Description | Date | Identifier | |
| Letter from Armstrong's Patents Co. Ltd. discussing damper production and valve experiments. | 5th Oct 1937 | Box 152 \ 2 scan0041 | |
| Continuation of a letter regarding the supply of oil-resisting rubber glands for pistons. | 7th Oct 1937 | Box 152 \ 2 scan0042 | |
| Cover letter from Armstrong's Patents Co. Ltd. enclosing a copy of a letter from Birmingham Aluminium Co. | 7th Oct 1937 | Box 152 \ 2 scan0043 | |
| Letter from a casting company discussing the feasibility and risks of an experiment with pressure casting a specific material for a client's design. | 7th Oct 1937 | Box 152 \ 2 scan0044 | |
| Letter from The Birmingham Aluminium Casting Co. Ltd. comparing machining allowances for Aluminium and Zinc alloy castings. | 7th Oct 1937 | Box 152 \ 2 scan0045 | |
| Letter to Armstrong's Patents Co. Ltd. concerning damper casing modifications and metal specifications. | 7th Oct 1937 | Box 152 \ 2 scan0046 | |
| Covering order for shock absorbers from Armstrong's Patents Co. Ltd. | 12th Oct 1937 | Box 152 \ 2 scan0047 | |
| Letter to Gordon Armstrong regarding the despatch of damper components and a discussion on replenishing valve design. | 12th Oct 1937 | Box 152 \ 2 scan0048 | |
| Letter concerning the difficulty in obtaining R.R.53.C alloy, comparing its casting properties and strength to other alloys. | 12th Oct 1937 | Box 152 \ 2 scan0049 | |
| Letter from The Armstrong's Patents Co. Ltd. regarding an order for shock absorber parts and seeking clarification on the levers required. | 13th Oct 1937 | Box 152 \ 2 scan0050 | |
| Diagram showing the movement and action of a suspension lever arm, indicating the normal, maximum bump, and maximum rebound positions. | 13th Oct 1937 | Box 152 \ 2 scan0051 | |
| Letter from Gordon Armstrong Patent Suspension Company acknowledging receipt of a letter. | 13th Oct 1937 | Box 152 \ 2 scan0052 | |
| Letter to Armstrong's Patents Co. Ltd. clarifying the set in levers for a damper to sketch SCD.132. | 14th Oct 1937 | Box 152 \ 2 scan0053 | |
| Telex message requesting the weights of each damper. | 14th Oct 1937 | Box 152 \ 2 scan0054 | |
| Letter to Messrs. Luvax Limited acknowledging their correspondence and confirming that tests are proceeding. | 19th Oct 1937 | Box 152 \ 2 scan0055 | |
| Cost comparison memo for Bentley and Armstrong shock dampers, calculating potential savings. | 14th Oct 1937 | Box 152 \ 2 scan0056 | |
| Parts list detailing drawing numbers, quantities, material costs, and bonus time allowances. | 21th Oct 1937 | Box 152 \ 2 scan0057 | |
| Parts list with drawing numbers, material specifications, costs, and bonus time allowances. | 21th Oct 1937 | Box 152 \ 2 scan0058 | |
| Cost and time analysis sheet for various components, detailing material costs and bonus labor times. | 15th Oct 1937 | Box 152 \ 2 scan0059 | |
| Letter from Luvax Limited regarding the dispatch of telescopic shock absorbers after experimentation. | 15th Oct 1937 | Box 152 \ 2 scan0060 | |
| Letter from Luvax Limited regarding piston shock absorbers, enclosing drawings and providing weights. | 15th Oct 1937 | Box 152 \ 2 scan0061 | |
| General arrangement of a piston type shock absorber. | 16th Mar 1937 | Box 152 \ 2 scan0062 | |
| General arrangement drawing for a piston coupling assembly with specifications. | 16th Jul 1937 | Box 152 \ 2 scan0063 | |
| General arrangement of a piston type shock absorber. | 31th May 1937 | Box 152 \ 2 scan0064 | |
| Letter to Gordon Armstrong requesting patent and royalty information for a new shock absorber design. | 20th Oct 1937 | Box 152 \ 2 scan0065 | |
| Request to issue a covering order for various rubber parts from the British Tyre & Rubber Co. Ltd. | 21th Oct 1937 | Box 152 \ 2 scan0066 | |
| Letter from Luvax Limited regarding the despatch of a sample P.6 Piston type Shock Absorber. | 22th Oct 1937 | Box 152 \ 2 scan0067 | |
| Confirming the price for shock absorbers obtained from The Armstrong's Patents Co. Ltd. for a specific order. | 22th Oct 1937 | Box 152 \ 2 scan0068 | |
| Letter to Luvax Ltd. requesting a price for a P.6. damper and comparing shock absorber constructions. | 25th Oct 1937 | Box 152 \ 2 scan0069 | |
| Letter from Armstrong's Patents Co. Ltd. regarding a depth discrepancy with shock absorber castings for order 49489. | 25th Oct 1937 | Box 152 \ 2 scan0070 | |
| Letter from Luvax Limited discussing the specifications and pricing of P6 and P7 shock absorber units. | 27th Oct 1937 | Box 152 \ 2 scan0071 | |
| Cost and design comparison between the company's shock dampers and Armstrong dampers. | 30th Oct 1937 | Box 152 \ 2 scan0072 | |
| Recommendation to change from a single-cylinder to a twin-cylinder damper design for improved customer satisfaction. | 30th Oct 1937 | Box 152 \ 2 scan0073 | |
| Cost comparison blueprint for horizontal and vertical cylinder dampers. | 27th Oct 1937 | Box 152 \ 2 scan0074 | |
| Comparative cost analysis of inter-lever and piston assemblies for R.R. and Armstrong dampers. | 27th Oct 1937 | Box 152 \ 2 scan0075 | |
| Cross-sectional drawing of a recuperating valve arrangement with a piston detail. | 27th Oct 1937 | Box 152 \ 2 scan0076 | |
| Comparative layout of components for the Rolls-Royce and Armstrong dampers. | 2nd Nov 1937 | Box 152 \ 2 scan0077 | |
| Costs, issues, and design changes related to Armstrong Dampers. | 2nd Nov 1937 | Box 152 \ 2 scan0078 | |
| Patent application for a shock absorber valve and proposed royalty terms with Armstrong Patents. | 9th Nov 1937 | Box 152 \ 2 scan0079 | |
| Page 2 of a memo discussing a valve and royalty payments with Gordon Armstrong. | 9th Nov 1937 | Box 152 \ 2 scan0080 | |
| Letter from The Gordon Armstrong Patent Suspension Co. Ltd. regarding a patent arrangement for a balanced valve in shock absorbers. | 10th Sep 1937 | Box 152 \ 2 scan0081 | |
| Cross-sectional blueprint of a shock damper valve. | 9th Nov 1937 | Box 152 \ 2 scan0082 | |
| Quotation for 4,000 metallic bellows from The Packless Gland Co. Ltd. | 5th Nov 1937 | Box 152 \ 2 scan0083 | |
| The concluding page of a letter to Rolls-Royce, Ltd. from The Packless Gland Co., Ltd. | 5th Nov 1937 | Box 152 \ 2 scan0084 | |
| Request to design a larger area replenishing valve for an Armstrong damper. | 9th Nov 1937 | Box 152 \ 2 scan0085 | |
| Letter to The Packless Gland Co. Ltd. complaining about the cost of a small bellows. | 12th Nov 1934 | Box 152 \ 2 scan0086 | |
| Full-size schematic for a suggested front shock absorber installation. | 10th Nov 1937 | Box 152 \ 2 scan0087 | |
| Letter from Armstrong's Patents Co. Ltd. concerning the examination and replacement of seized control rod glands. | 19th Nov 1937 | Box 152 \ 2 scan0088 | |
| Letter from Gordon Armstrong Patent Suspension regarding a modification to recuperating valves in pistons. | 22th Nov 1937 | Box 152 \ 2 scan0089 | |
| Letter from Armstrong's Patents Co. Ltd. regarding a bellows arrangement for controlling a shock absorber. | 29th Nov 1937 | Box 152 \ 2 scan0090 | |
| Cross-sectional drawing of a bellows control arrangement. | 2nd Dec 1937 | Box 152 \ 2 scan0091 | |
| Development, pricing, and sourcing of Armstrong dampers. | 2nd Dec 1937 | Box 152 \ 2 scan0092 | |
| Costs, development, and design changes for Armstrong Dampers. | 2nd Nov 1937 | Box 152 \ 2 scan0093 | |
| Letter to Armstrong's Patents Co. Ltd. regarding a bellows control arrangement. | 2nd Dec 1937 | Box 152 \ 2 scan0094 | |
| Letter from Armstrong's Patents Co. Ltd. regarding a recuperating valve issue, enclosing a crank assembly as a solution. | 10th Dec 1937 | Box 152 \ 2 scan0095 | |
| Development of Armstrong dampers and the strategy of manufacturing parts in-house versus buying from proprietary manufacturers. | 12th Dec 1937 | Box 152 \ 2 scan0096 | |
| Internal memorandum regarding shock absorbers and damping, following up on issues raised by customers. | 13th Jan 1938 | Box 152 \ 2 scan0097 | |
| Correspondence from Armstrong's Patents Co. Ltd. regarding the despatch of rear dampers and a request for confirmation on the balance. | 24th Jan 1938 | Box 152 \ 2 scan0098 | |
| Letter to Armstrong's Patents Co. Ltd. regarding the supply and ordering of dampers. | 25th Jan 1938 | Box 152 \ 2 scan0099 | |
| Communication regarding a price reduction offer for shock damper bellows from the British Thermostat Co. | 28th Jan 1938 | Box 152 \ 2 scan0100 | |
| Rejection of a proposal regarding shock damper bellows from the British Thermostat Co. due to liability concerns. | 4th Feb 1938 | Box 152 \ 2 scan0101 | |
| Letter from Armstrong's Patents Co. Ltd. concerning the readiness of special bellows control shock absorbers for fitting. | 22th Feb 1938 | Box 152 \ 2 scan0102 | |
| Letter to Armstrong's Patents Co. Ltd. regarding hydraulic control units and a quotation for dampers. | 23th Feb 1938 | Box 152 \ 2 scan0103 | |
| Letter from The Armstrong's Patents Co. Ltd. regarding the arrangement to build and despatch a new pair of dampers. | 24th Feb 1938 | Box 152 \ 2 scan0104 | |
| Request for a drawing of a new valve spring for Armstrong dampers to increase maximum load. | 3rd Mar 1938 | Box 152 \ 2 scan0105 | |
| Letter from The Packless Gland Co. Ltd. proposing a modification to an assembly for Order No. 57803 due to manufacturing impracticability. | 3rd Mar 1938 | Box 152 \ 2 scan0106 | |
| Blueprint drawing of a bellows unit with associated dimensions. | 8th Mar 1938 | Box 152 \ 2 scan0107 | |
| Letter to a supplier regarding a design modification for a bellows component. | 4th Mar 1938 | Box 152 \ 2 scan0108 | |
| Letter from The Packless Gland Co. Ltd. confirming they can supply assemblies for part number EX.S.497. | 5th Mar 1938 | Box 152 \ 2 scan0109 | |
| Quotation from Armstrong's Patents Co. Ltd. for Armstrong Super Shock Absorbers. | 7th Mar 1938 | Box 152 \ 2 scan0110 | |
| Enclosing two blueprints for the Ex.S.562 spring for Armstrong Dampers and requesting the instruction to manufacture 12 of them. | 10th Mar 1938 | Box 152 \ 2 scan0111 | |
| Requesting blueprints and parts required for testing a knurled shaft lever attachment. | 10th Mar 1938 | Box 152 \ 2 scan0112 | |
| Arrangement drawing of a recuperating valve. | 10th Mar 1938 | Box 152 \ 2 scan0113 | |
| Jig for an Armstrong shock absorber with hydraulic bellows control. | 31th Aug 1936 | Box 152 \ 2 scan0114 | |
| Blueprint for a Rear Shock Absorber Arm. | 31th Aug 1936 | Box 152 \ 2 scan0115 | |
| Blueprint for a Vauxhall Motors shock absorber shaft. | 30th May 1934 | Box 152 \ 2 scan0116 | |
| Letter from The British Thermostat Co. Ltd. regarding drawings and a manufacturing suggestion for a Shock Damper Unit. | 26th Apr 1938 | Box 152 \ 2 scan0117 | |
| Technical review and survey of hydraulic spring dampers, detailing their development, types, global usage, and trends. | 3rd May 1938 | Box 152 \ 2 scan0118 | |
| Review of various types of hydraulic spring dampers. | 3rd May 1938 | Box 152 \ 2 scan0119 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the dispatch of shock absorber drawings and parts. | 1st Jun 1938 | Box 152 \ 2 scan0120 | |
| Advice note from Armstrong's Patents Co. Ltd. regarding the dispatch of shock absorbers. | 1st Jun 1938 | Box 152 \ 2 scan0121 | |
| Letter to Luvax Ltd. regarding the trial of their piston type shock dampers on an experimental Bentley. | 1st Oct 1938 | Box 152 \ 2 scan0122 | |
| Letter from Luvax Limited concerning Piston Type Shock Absorbers and enclosing a related blueprint. | 6th Oct 1938 | Box 152 \ 2 scan0123 | |
| Letter to Luvax Ltd. requesting a price for a pair of shock dampers for a Bentley. | 25th Oct 1938 | Box 152 \ 2 scan0124 | |
| Letter to Luvax Ltd regarding the supply of shock dampers and levers for Bentley. | 7th Nov 1938 | Box 152 \ 2 scan0125 | |
| Letter from LUVAX LIMITED confirming receipt of an order for Piston Type Shock Absorbers for Bentley. | 11th Nov 1938 | Box 152 \ 2 scan0126 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. specifying requirements for a double-acting damper. | 1st Dec 1938 | Box 152 \ 2 scan0127 | |
| Letter to Gordon Armstrong Co. Ltd. regarding a disappointing price increase for dampers, page 2. | 1st Dec 1938 | Box 152 \ 2 scan0128 | |
| Order for one gallon of Armstrong shock damper oil. | 13th Jan 1939 | Box 152 \ 2 scan0129 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. regarding the use of their dampers as dashpots on Wraith and Bentley models. | 23th Feb 1939 | Box 152 \ 2 scan0130 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the manufacture of dash pots and enclosing drawings for Wraith and Bentley models. | 24th Feb 1939 | Box 152 \ 2 scan0131 | |
| Request to send an official order for a pair of rubber buffers from the British Tyre & Rubber Co. | 4th Mar 1939 | Box 152 \ 2 scan0132 | |
| Requesting the dispatch of a rubber bush to Wilmot Breeden Ltd. | 3rd May 1939 | Box 152 \ 2 scan0133 | |
| Letter to Wilmot-Breeden Ltd. regarding the failure of an Oscillith bush in a shock damper link during testing. | 3rd May 1939 | Box 152 \ 2 scan0134 | |
| Letter to Gordon Armstrong Patent Suspension Co. regarding the design of rear dampers and Oyston valves. | 9th Jun 1939 | Box 152 \ 2 scan0135 | |
| Letter from Armstrong's Patents Co. Ltd. discussing Oyston valves and suggested rear dampers. | 15th Jun 1939 | Box 152 \ 2 scan0136 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. requesting a print of a shock damper shaft for a Bentley. | 19th Jun 1939 | Box 152 \ 2 scan0137 | |
| The strength testing of a hydrogen-brazed shock damper lever. | 21th Jun 1939 | Box 152 \ 2 scan0138 | |
| Letter from Armstrong's Patents Co. Ltd. regarding a detailed drawing of a shock damper shaft. | 23th Jun 1939 | Box 152 \ 2 scan0140 | |
| Diagram for a provisional patent of a shock absorber. | 1st Jan 1938 | Box 152 \ 2 scan0141 | |
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