| Description | Date | Identifier | |
| Letter from The Weston Anti-Vibrator and Non-Skid Manufacturing Co. offering a demonstration of their 'Rectaskid' device. | 2nd Jan 1924 | Box 77 \ 5 scan0176 | |
| Letter from Lankester Engineering Company discussing the correction of skids via the 'RECTASKID' device, attributed to better road adhesion from flexible springs. | 20th Jan 1924 | Box 77 \ 5 scan0177 | |
| Claims of the 'Rectaskid' anti-skidding device and a proposal to test it. | 7th Mar 1924 | Box 77 \ 5 scan0178 | |
| 'Rectaskid' anti-skidding device and proposing a demonstration to verify its claims. | 7th Mar 1924 | Box 77 \ 5 scan0179 | |
| Investigation into a device for preventing side slip and reducing road shocks, advertised in the 'Daily Mail'. | 1st Mar 1924 | Box 77 \ 5 scan0180 | |
| Enquiry to 'Rectaskid' about demonstrating an anti-skid device on a 40/50 HP car. | 12th Mar 1924 | Box 77 \ 5 scan0181 | |
| Letter from The Weston Anti-Vibrator and Non-Skid Manufacturing Co., Ltd. agreeing to a trial run of their 'Rectaskid' product. | 13th Mar 1924 | Box 77 \ 5 scan0182 | |
| Letter to The Weston Manufacturing Co. Ltd. acknowledging a previous letter and mentioning a temporary absence. | 14th Mar 1924 | Box 77 \ 5 scan0183 | |
| Proposal to test oilskin linings for chassis road spring gaiters to prevent oil saturation. | 9th May 1924 | Box 77 \ 5 scan0184 | |
| Invoice from The Weston Anti-Vibrator and Non-Skid Manufacturing Co., Ltd. for two sets of 'Rectaskid' for 40/50 HP cars, marked as no charge. | 17th May 1924 | Box 77 \ 5 scan0185 | |
| Letter to The Weston Mfg. Co. Ltd. arranging a test of a 40/50 HP car fitted with a 'Rectaskid' device. | 13th May 1924 | Box 77 \ 5 scan0186 | |
| Letter from The Weston Anti-Vibrator and Non-Skid Manufacturing Co. Ltd. to arrange a demonstration of their 'RECTASKID' product. | 14th May 1924 | Box 77 \ 5 scan0187 | |
| Letter to Mr. Bailey discussing the surprising effectiveness of an anti-skid device named Rectoskid. | 15th May 1924 | Box 77 \ 5 scan0188 | |
| Inquiry regarding the test results of 'Rectaskids' and their effect on the chassis guarantee. | 27th May 1924 | Box 77 \ 5 scan0189 | |
| Trial of the 'Rectaskid' device on a Hooper limousine and other experimental cars. | 30th May 1924 | Box 77 \ 5 scan0190 | |
| From B.J. to Hs. requesting an opinion on the 'Rectaskid' tried on Captain Pelham Clinton's car. | 31th May 1924 | Box 77 \ 5 scan0191 | |
| The poor performance of the 'Rectaskid' device during trials and a planned further test. | 6th Jun 1924 | Box 77 \ 5 scan0192 | |
| Instruction leaflet for fitting 'Rectaskid' anti-skid devices to quarter elliptic and full cantilever springs. | 6th Jun 1924 | Box 77 \ 5 scan0193 | |
| General instructions for fitting 'Rectaskid' races into various types of vehicle springs. | 11th Jun 1924 | Box 77 \ 5 scan0194 | |
| 'Rectaskid' anti-skid and comfort-improving fittings. | 11th Jun 1924 | Box 77 \ 5 scan0195 | |
| Evaluating a 'Rectaskid' fitting, concluding with a recommendation against its use. | 11th Jun 1924 | Box 77 \ 5 scan0196 | |
| Cover note to Mr. Tonge regarding a document on the subject of 'RECTASKID'. | 9th Jul 1924 | Box 77 \ 5 scan0197 | |
| Seeking to verify claims from the Rectaskid Company about tests conducted on their anti-skid fittings. | 18th Nov 1924 | Box 77 \ 5 scan0198 | |
| Report about RECTASKID. | 19th Nov 1924 | Box 77 \ 5 scan0199 | |
| The performance and fitting of 'Rectaskid' anti-skid devices on a 40/50 HP car. | 11th Jun 1924 | Box 77 \ 5 scan0200 | |
| Report page evaluating the 'Rectaskid' fitting, detailing its disadvantages, and recommending against its use. | 2nd Feb 1927 | Box 77 \ 5 scan0201 | |
| Test results and viability of the 'RECTASKID' suspension device. | 2nd Feb 1927 | Box 77 \ 5 scan0202 | |
| Brass nut for an exhaust tube. | 6th Dec 1911 | Box 77 \ 5 scan0203 | |
| The failure of a brass exhaust tube nut after a 500-mile road test. | 18th Dec 1911 | Box 77 \ 5 scan0204 | |
| Locking arrangements for rear hubs. | 5th Dec 1911 | Box 77 \ 5 scan0205 | |
| The standardization and approval of a locking arrangement for the nut on rear hubs. | 13th Jul 1912 | Box 77 \ 5 scan0206 | |
| Recommendation to adopt an improved knurl-headed water pump gland nut as standard, forgoing the usual 10,000-mile test. | 9th Apr 1912 | Box 77 \ 5 scan0207 | |
| Responding to a verbal request for information regarding Carburized Silencer Nuts. | 4th May 1914 | Box 77 \ 5 scan0208 | |
| Letter from F.H. Royce discussing the adoption of a special nut for the torque tube as a standard part. | 26th Oct 1912 | Box 77 \ 5 scan0209 | |
| Letter providing feedback on Grover washer and nut samples, with suggestions for design and manufacturing improvements. | 5th Nov 1912 | Box 77 \ 5 scan0210 | |
| Page 2 of a technical note regarding blunt cutters, signed by F.H. Royce. | 25th Aug 1914 | Box 77 \ 5 scan0211 | |
| Letter from The Engineering Improvement Co Ltd offering sample Perfloc nuts. | 25th Aug 1914 | Box 77 \ 5 scan0212 | |
| Instructions for removing Perfloc Nuts using ordinary or box spanners. | 25th Aug 1914 | Box 77 \ 5 scan0213 | |
| Brochure for 'Perfloc Nuts' from The Engineering Improvement Co., Ltd. | 25th Aug 1914 | Box 77 \ 5 scan0214 | |
| Price list for Perfloc nuts from the Engineering Improvement Company, Limited. | 25th Aug 1914 | Box 77 \ 5 scan0215 | |
| Reports and description of Perfloc lock-nuts, including vibration and corrosion tests. | 25th Aug 1914 | Box 77 \ 5 scan0216 | |
| The application and performance of Perfloc nuts with an accompanying photograph of them on a high-pressure pump. | 25th Aug 1914 | Box 77 \ 5 scan0217 | |
| Report by E. W. Monkhouse on the performance of Perfloc nuts compared to ordinary nuts under various tests. | 19th Apr 1912 | Box 77 \ 5 scan0218 | |
| Tensile and vibration tests of bolts fitted with 'Perfloc' nuts. | 19th Apr 1912 | Box 77 \ 5 scan0219 | |
| The tensile tests of four bolts fitted with 'Perfloc' nuts, received from The Engineering Improvement Co Ltd. | 30th Mar 1912 | Box 77 \ 5 scan0220 | |
| The unsatisfactory method of riveting up bolts, proposing a castellated nut and split pin as a safer alternative. | 15th May 1915 | Box 77 \ 5 scan0221 | |
| Testimonial letter and advertisement for Drake Lock-Nuts from The Vulcan Iron Works Company. | 10th Sep 1918 | Box 77 \ 5 scan0222 | |
| Promotional flyer for Drake Lock-Nuts, featuring four customer testimonial letters and product details. | 15th Jul 1919 | Box 77 \ 5 scan0223 | |
| Letter offering the sale of patents for DRAKE Lock-Nuts. | 23th Sep 1921 | Box 77 \ 5 scan0224 | |
| Letter outlining payment terms for patents and promoting the use of the DRAKE Lock-Nut. | 1st Nov 1921 | Box 77 \ 5 scan0225 | |
| Blueprint illustrating the mechanical principle of the Drake Lock-Nut. | 30th Mar 1920 | Box 77 \ 5 scan0226 | |
| Technical leaflet for the 'Drake' Lock Nut, explaining its mechanism, benefits, and applications. | 30th Mar 1920 | Box 77 \ 5 scan0227 | |
| Price list and promotional leaflet for Drake Lock-Nuts. | 27th Nov 1924 | Box 77 \ 5 scan0228 | |
| Letter from H. Mendes submitting a patent locking nut and bolt for inspection. | 27th Nov 1924 | Box 77 \ 5 scan0229 | |
| The examination and return of a sample patent Locking Nut and Bolt. | 28th Nov 1924 | Box 77 \ 5 scan0230 | |
| Letter to H. Mendes Esq. regarding the return of a sample patent Locking Nut and Bolt. | 28th Nov 1924 | Box 77 \ 5 scan0231 | |
| Impracticality of a proposed patent locking nut invention. | 25th Mar 1927 | Box 77 \ 5 scan0232 | |
| Unsuitability of special lock nuts for motorcar or aero engines. | 29th Mar 1927 | Box 77 \ 5 scan0233 | |
| Table of square collar nuts, requesting models be made from drawing Lec.2590 for inspection. | 12th Sep 1928 | Box 77 \ 5 scan0234 | |
| Request to manufacture a new range of square collar nuts for inspection. | 6th Oct 1928 | Box 77 \ 5 scan0235 | |
| Size alteration for square collar nuts. | 6th Nov 1928 | Box 77 \ 5 scan0236 | |
| Request for better quality rubber hose for cars, noting the poor state of the hose on car 2301. | 10th Jun 1914 | Box 78 \ 1 scan0001 | |
| Requesting the testing of five new steam hose samples following a complaint about the current radiator hose's durability. | 29th Jun 1914 | Box 78 \ 1 scan0002 | |
| Requesting tests on five samples of steam hose and a handwritten response requesting longer samples for testing. | 30th Jun 1914 | Box 78 \ 1 scan0003 | |
| Requesting a minimum 12-inch sample of steam hose for testing purposes. | 6th Jul 1914 | Box 78 \ 1 scan0004 | |
| Steam hose samples from B.G. Goodrich Co. and North British Rubber Co. for testing and comparison. | 15th Jul 1914 | Box 78 \ 1 scan0005 | |
| To Mr Hives requesting tests on new hose samples for a water connection. | 21th Jul 1914 | Box 78 \ 1 scan0006 | |
| Internal memorandum regarding three samples of steam hose received from The India Rubber Gutta Percha Co. | 4th Jun 1914 | Box 78 \ 1 scan0007 | |
| Two samples of Steam Hose received from Messrs. Charles Macintosh & Co. | 4th Jun 1914 | Box 78 \ 1 scan0008 | |
| Report on steam hose samples from various makers. | 3rd Dec 1914 | Box 78 \ 1 scan0009 | |
| Replying about the status of steam hose samples fitted to experimental cars. | 4th Dec 1914 | Box 78 \ 1 scan0010 | |
| To Mr. Hives requesting a report on rubber hose samples for radiators, as per Mr. Royce's instruction. | 27th Jan 1915 | Box 78 \ 1 scan0011 | |
| Abandoning concertina-pattern flexible tubing due to its weight, high resistance and manufacturing issues. | 23th Jun 1915 | Box 78 \ 1 scan0012 | |
| To Mr Hives requesting a report on an experiment concerning rubber hoses for radiators. | 10th Aug 1915 | Box 78 \ 1 scan0013 | |
| Ongoing problems with rubber hoses and testing a new type for the Phantom & 20 HP Chassis. | 1st Jul 1926 | Box 78 \ 1 scan0014 | |
| Internal request to obtain a 2 ft. rubber hose with a 4' bore. | 14th Feb 1928 | Box 78 \ 1 scan0015 | |
| Proposed water circulation device for model 49GB, comparing it to Packard's system to avoid engine hot spots and radiator freezing. | 30th Dec 1916 | Box 78 \ 1 scan0016 | |
| Technical memo discussing various mechanisms for operating external radiator louvres. | 13th May 1919 | Box 78 \ 1 scan0017 | |
| Methods for radiator screening and investigating a bye-pass system for engine temperature control. | 28th May 1919 | Box 78 \ 1 scan0018 | |
| Test report on fitting a radiator bypass pipe to a 40/50 chassis to manage water temperature. | 10th Jun 1919 | Box 78 \ 1 scan0019 | |
| Controlling radiator hot water flow to prevent freezing and experiences with manual radiator blanking. | 10th Jun 1919 | Box 78 \ 1 scan0020 | |
| Tests for the effect of a bye-pass in the chassis water circulation system. | 12th Jun 1919 | Box 78 \ 1 scan0021 | |
| Radiator and engine cooling options for the 20 HP chassis. | 24th Jun 1919 | Box 78 \ 1 scan0022 | |
| Means of controlling engine water temperature to prevent piston knock during city driving. | 22th Jul 1919 | Box 78 \ 1 scan0023 | |
| Methods of controlling engine water temperature, comparing bye-pass and louvred systems. | 25th Jul 1919 | Box 78 \ 1 scan0024 | |
| Engine improvements to reduce running costs and wear, including thermostats and piston design. | 1st Sep 1919 | Box 78 \ 1 scan0025 | |
| Design of a water temperature regulator and thermostat bypass for the 40/50 HP chassis. | 23th Sep 1919 | Box 78 \ 1 scan0026 | |
| Requesting bellows tube parts from America and blueprints to be sent to West Wittering and Mr. Day in Derby. | 9th Sep 1919 | Box 78 \ 1 scan0027 | |
| The water temperature regulator and thermostat for the 40/50 HP chassis. | 25th Sep 1919 | Box 78 \ 1 scan0028 | |
| The water temperature regulator and pipe arrangement for the 40/50 HP chassis. | 27th Sep 1919 | Box 78 \ 1 scan0029 | |
| Page discussing an engine fitted with a water temperature control. | 27th Sep 1919 | Box 78 \ 1 scan0030 | |
| Failure of thermometer fixings on engine top water pipes and seeking instructions for handling broken parts and potential modifications. | 18th Nov 1919 | Box 78 \ 1 scan0031 | |
| List of parts and modifications to be fitted to a chassis for a 10,000-mile test run. | 19th Nov 1919 | Box 78 \ 1 scan0032 | |
| Casting cylinder covers in aluminium and brass due to a moulders' strike causing cast iron shortages. | 3rd Dec 1919 | Box 78 \ 1 scan0033 | |
| The modification of a Sylphon unit for the water temperature regulator on a 40/50 HP chassis. | 6th Jan 1920 | Box 78 \ 1 scan0034 | |
| Design faults and required clearances for a Sylphon unit water temperature regulator on a 40/50 HP chassis. | 7th Jan 1920 | Box 78 \ 1 scan0035 | |
| Thermostats, thermometers, and crankchamber fumes on the 40/50 HP chassis. | 2nd Feb 1920 | Box 78 \ 1 scan0036 | |
| Internal memorandum discussing proposed modifications and component fittings for a trials car chassis destined for America. | 4th Feb 1920 | Box 78 \ 1 scan0037 | |
| Instruction to drill a small air leak hole in the water temperature regulator valve disc on a 40/50 HP chassis to allow the system to drain properly. | 5th Feb 1920 | Box 78 \ 1 scan0038 | |
| The new features of the 4.EX experimental chassis and its planned testing. | 27th Feb 1920 | Box 78 \ 1 scan0039 | |
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