Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
The design difficulties and dimensional requirements for hydraulic jacks.28th Feb 1930Box 26 \ 3  Scan059
The limitations of the standard Dunlop Jack and the reasons for not favoring the Jack-all system.28th Feb 1930Box 26 \ 3  Scan060
Requesting comments on an attached memo regarding 4-Wheel Jacks for GWP-14 Swinton.12th May 1930Box 26 \ 3  Scan061
Poor fitting of 4-wheel hydraulic jacks and concerns over potential damage.9th May 1930Box 26 \ 3  Scan062
Jenks Jacks, attaching related correspondence and arranging for a set to be fitted to a 40/50 HP chassis.26th Jan 1931Box 26 \ 3  Scan063
Fitting of 'Jenks Jacks' and the associated challenges with modern bodywork.23th Jan 1931Box 26 \ 3  Scan064
Letter from H. Jenks Limited regarding the dispatch of jacks for the 20/25 and Phantom II models.20th Jan 1931Box 26 \ 3  Scan065
Test report and evaluation of 'Jenks Jacks' for potential use on cars, outlining advantages and disadvantages.3rd Feb 1931Box 26 \ 3  Scan066
Sending jacks for examination and considering a modified fixing and locking scheme to the axle.3rd Feb 1931Box 26 \ 3  Scan067
Brochure for 'Jenks Jacks' which are permanently fitted.19th Mar 1931Box 26 \ 3  Scan068
Test report and analysis of a hydraulic jack for a Phantom II car, made by Eversure Accessories Ltd.19th Mar 1931Box 26 \ 3  Scan069
The performance of improved pattern Jenks Jacks fitted to a Phantom II car, noting a required modification.30th Apr 1931Box 26 \ 3  Scan070
Suitability of an Eversure hydraulic jack for a Phantom II car, detailing its dimensions and comparing it to a Dunlop jack.28th Apr 1931Box 26 \ 3  Scan071
Comparison between the Eversure and Dunlop hydraulic jacks, concluding to continue with the Dunlop.4th May 1931Box 26 \ 3  Scan072
List of modifications for the Kestrel 39 Type Test Engine after an unsuccessful run.6th Jul 1931Box 26 \ 3  Scan073
Type test for the Buzzard M.S.13 Evaporatively Cooled engine, including camshaft and reduction gear fittings.3rd Nov 1931Box 26 \ 3  Scan074
Suggesting a trial of the 'Jackall' 4-wheel hydraulic jacking system.13th Nov 1931Box 26 \ 3  Scan075
Requesting the acquisition and testing of 'Jackall' four-wheel jacks for the Phantom II model.17th Nov 1931Box 26 \ 3  Scan076
Fitting of a Jackall Hydraulic Four wheel System to a Phantom II chassis.17th Nov 1931Box 26 \ 3  Scan077
Customer testimonial letter for 'Jackall' Hydraulic Jacks fitted to a Lagonda Speed Model.19th Nov 1931Box 26 \ 3  Scan078
Promotional leaflet for the Jackall four-wheel jacking system.19th Nov 1931Box 26 \ 3  Scan079
Advertisement for the 'JACKALL' four-wheel jacking system, featuring testimonials from famous racing drivers.19th Nov 1931Box 26 \ 3  Scan080
Blueprint of the Jackall assembly for a Phantom II vehicle.23th Mar 1936Box 26 \ 3  Scan081
Blueprint for the Jackall Assembly No. 108, showing front and rear fittings.23th Mar 1936Box 26 \ 3  Scan082
Instructional blueprint for the fitting and use of four-wheel jacks.17th Nov 1931Box 26 \ 3  Scan083
Request to obtain and test a set of 'Jackall' four-wheel jacks for the Phantom 11, with special Duralumin fittings.17th Nov 1931Box 26 \ 3  Scan084
Inquiry to Donald Sessions & Co. Ltd. about their D.W.S. Mechanical Four-wheel jacking system for the Phantom II car.19th Nov 1931Box 26 \ 3  Scan085
Enquiries into different types of vehicle jacking systems.19th Nov 1931Box 26 \ 3  Scan086
Letter from Donald Sessions & Company Ltd. regarding a demonstration of their D.W.S. Permanent Mechanical Jacking System.20th Nov 1931Box 26 \ 3  Scan087
Letter from Donald Sessions & Company Ltd. arranging a meeting in Derby.26th Nov 1931Box 26 \ 3  Scan088
Letter to Messrs S. Smith & Sons regarding an order to fit Jackall Jacks to a Phantom II car.30th Nov 1931Box 26 \ 3  Scan089
Comparing the hydraulic Jackall system with the mechanical D.W.S. four-wheel jacking system.3rd Dec 1931Box 26 \ 3  Scan090
Letter from Donald Sessions & Company Ltd. proposing their D.W.S. Jacking System for fitting to cars.3rd Dec 1931Box 26 \ 3  Scan091
Letter from Donald Sessions & Company Ltd. requesting blueprints for rear axle and spring mountings.3rd Dec 1931Box 26 \ 3  Scan092
Article reprinted from 'The Autocar' describing the D.W.S. permanently fitted four-wheel jack system.9th Oct 1931Box 26 \ 3  Scan093
From Sg. to Hs. regarding the ordering of a D.W.S. scheme for Four Wheel Jacking Systems over a hydraulic option.4th Dec 1931Box 26 \ 3  Scan094
Approval and pricing for fitting D.W.S. jacks to an experimental Phantom II car.7th Dec 1931Box 26 \ 3  Scan095
Letter regarding fitting the D.W.S. Jacking System to the Phantom II and 25hp models.10th Dec 1931Box 26 \ 3  Scan096
Letter from Donald Sessions & Company Ltd. regarding the fitting of D.W.S. jacks to an experimental Phantom II.10th Dec 1932Box 26 \ 3  Scan097
Letter from Donald Sessions & Company Ltd. confirming an order for a set of D.W.S. Jacks.10th Dec 1931Box 26 \ 3  Scan098
Hand-drawn cross-section of a shackle damper and rear spring assembly.10th Dec 1931Box 26 \ 3  Scan099
Drawing detailing modifications and dimensions for a specific mechanical part, F.79628.10th Dec 1931Box 26 \ 3  Scan100
Drawing showing side and cross-section views of a jacking point for a structural beam.10th Dec 1931Box 26 \ 3  Scan101
Drawing detailing modifications to part F.79628 to accommodate a jack.12th Dec 1931Box 26 \ 3  Scan102
Query regarding an invoice from S. Smith & Sons for supplying and fitting a set of Jackall Four Wheel Jacks.12th Dec 1931Box 26 \ 3  Scan103
The fitting of Jackall four wheel jacks and the subsequent release of the invoice for payment.14th Dec 1931Box 26 \ 3  Scan104
Price and potential discounts for a set of D.W.S. Jacks.15th Dec 1931Box 26 \ 3  Scan105
Letter to Donald Sessions & Co. Ltd. regarding suggestions for rear axle jack fittings.15th Dec 1931Box 26 \ 3  Scan106
Letter to S. Smith & Sons regarding testing of strengthened rear axle fittings and the Jackall system.18th Dec 1931Box 26 \ 3  Scan107
Letter from S. Smith & Sons regarding the despatch of reinforced brackets for a Jackall set.24th Dec 1931Box 26 \ 3  Scan108
Blueprint of the Jackall Assembly No. 108, detailing front and rear fitting instructions.6th Jan 1932Box 26 \ 3  Scan109
Letter to Donald Sessions & Co. Ltd. regarding the fitting of special brackets for D.W.S. Jacks.6th Jan 1932Box 26 \ 3  Scan110
Letter from Donald Sessions & Company Ltd confirming a car is ready for fitting with D.W.S. Jacks.7th Jan 1932Box 26 \ 3  Scan111
Letter from Donald Sessions & Company Ltd. confirming a date for fitting D.W.S. Jacks to a chassis.8th Jan 1932Box 26 \ 3  Scan112
Investigating a price discrepancy for Jackall Hydraulic Jacks.9th Jan 1932Box 26 \ 3  Scan113
Letter to Donald Sessions & Coy. Ltd. arranging for the fitting of D.W.S. jacks to a car.11th Jan 1931Box 26 \ 3  Scan114
Quotations and negative experiences with the Jackall lifting jack system.11th Jan 1932Box 26 \ 3  Scan115
Inquiry from Captain Wylie about a 'located jack' known as D.W.S.21th Jan 1932Box 26 \ 3  Scan116
Difficulties of jacking cars and providing an initial impression of two four-wheel jacking systems, starting with the Jackall system.21th Jan 1932Box 26 \ 3  Scan117
Operation and multiple disadvantages of a vehicle jacking system.21th Jan 1932Box 26 \ 3  Scan118
The D.W.S. mechanical jacking system and its fitment.21th Jan 1932Box 26 \ 3  Scan119
Comparison document detailing the specifications, weights, clearances, and costs of Jackall and D.W.S. jacking systems.21th Jan 1932Box 26 \ 3  Scan120
Blueprint detailing the D.W.S. Four Wheel Jacking System and its components.22th Jan 1932Box 26 \ 3  Scan121
The testing of D.W.S. four-wheel jack fittings on car 19-EX during a 10,000-mile test.26th Jan 1932Box 26 \ 3  Scan122
Instruction to transfer a set of D.W.S. Jacks from car 22-EX to 19-EX for a 10,000-mile test.28th Jan 1932Box 26 \ 3  Scan123
Letter from Donald Sessions & Company Ltd. regarding the fitting of D.W.S. Jacks to a 40/50 car and a misplaced sectioned Jack screw.5th Feb 1932Box 26 \ 3  Scan124
Letter to Donald Sessions & Co Ltd regarding issues with jacks fitted to an experimental car and a missing component.6th Feb 1932Box 26 \ 3  Scan125
Correspondence from a supplier regarding a defective jacking system handle and a lost sectioned screw.8th Feb 1932Box 26 \ 3  Scan126
Letter to Donald Session & Company Ltd. regarding the failure and unsuitability of car jacks and handles.9th Feb 1932Box 26 \ 3  Scan127
The operation of a car jack, proposing a revised handle ratio for better ground clearance.10th Feb 1932Box 26 \ 3  Scan128
Letter from Donald Sessions & Company Ltd. addressing issues with their D.W.S. Permanent Jacks.10th Feb 1932Box 26 \ 3  Scan129
Letter from Donald Sessions & Company Ltd. reporting on a test of their permanent jacks fitted to a Phantom II car.12th Feb 1932Box 26 \ 3  Scan130
Letter from Donald Sessions & Company Ltd. discussing issues with jacks and tyre sizes.12th Feb 1932Box 26 \ 3  Scan131
Letter concerning the failure of a D.W.S. jacking system and arranging a demonstration.13th Feb 1932Box 26 \ 3  Scan132
Letter from Donald Sessions & Company Ltd. regarding a proposed visit to investigate issues with D.W.S. Jacks fitted to a car.18th Feb 1932Box 26 \ 3  Scan133
Letter to Messrs. Donald Sessions & Co. Ltd. arranging a visit to investigate an issue with jacks.19th Feb 1932Box 26 \ 3  Scan134
Letter from Donald Sessions & Company Ltd. concerning the performance and modification of four-wheel jacks.26th Feb 1932Box 26 \ 3  Scan135
Continuation letter from Donald Sessions & Company Ltd. regarding the modification of Jacks.26th Feb 1932Box 26 \ 3  Scan136
Letter from Donald Sessions & Co Ltd about modifications to jacks for a Phantom II car.30th Mar 1932Box 26 \ 3  Scan137
Letter to Donald Sessions & Company Ltd. regarding the successful jacking of a Phantom II model car from a 19' rim.31th Mar 1932Box 26 \ 3  Scan138
Requesting the transfer of rear jack brackets from car 22-EX to 19-EX for the fitting of D.W.S. four-wheel jacks.31th Mar 1932Box 26 \ 3  Scan139
Letter from Donald Sessions & Co. Ltd. concerning the modification and refitting of D.W.S. Permanent Jacks to a Phantom II.11th Apr 1932Box 26 \ 3  Scan140
Letter from Donald Sessions & Co Ltd regarding replacement heat-treated nickel steel bolts for D.W.S. Jacks on a Phantom II chassis.22th Apr 1932Box 26 \ 3  Scan141
Letter to Donald Sessions & Co Ltd regarding the late arrival of nickel steel bolts for a car undergoing Continental Tests.25th Apr 1932Box 26 \ 3  Scan142
Letter to Donald Sessions & Company Ltd. regarding D.W.S. Jacks fitted to a Phantom II car after its Continental Tests.9th Aug 1932Box 26 \ 3  Scan143
Letter from Donald Sessions & Company Ltd. confirming an arrangement for a meeting at the works.10th Aug 1932Box 26 \ 3  Scan144
Letter from Donald Sessions & Company Ltd. concerning the testing of D.W.S. Jacks and the supply of a new pattern.12th Aug 1932Box 26 \ 3  Scan145
The performance and required modifications for D.W.S. permanent jacks tested on car 19-EX.5th Sep 1932Box 26 \ 3  Scan146
Test results on a jack's effect on steering for the 19-EX model and policy on jack fitment.5th Sep 1932Box 26 \ 3  Scan147
Specifications for a new jack suitable for the Peregrine model.9th Sep 1932Box 26 \ 3  Scan148
The standardization and cost of D.W.S. located jacks for the 40/50 HP Phantom Chassis.4th Oct 1932Box 26 \ 3  Scan149
Letter to Donald Sessions & Co. Ltd. regarding the modification and standardisation of D.W.S. jacks.1st Oct 1932Box 26 \ 3  Scan150
The approval and pricing for D.W.S. permanent jacks for Phantom II cars.4th Oct 1932Box 26 \ 3  Scan151
Letter from Donald Sessions & Co. Ltd. regarding the fitting of modified permanent jacks to a car.3rd Oct 1932Box 26 \ 3  Scan152
Standardising D.W.S. jacks on the 40/50 HP chassis, requesting cost and delivery information.5th Oct 1932Box 26 \ 3  Scan153
Letter from Donald Sessions & Company Ltd. regarding a delay in delivering a modified D.W.S. jack.6th Oct 1932Box 26 \ 3  Scan154
Requesting notification upon approval of a new D.W.S. Jack for introduction into production.11th Oct 1932Box 26 \ 3  Scan155
Delay in approving modified D.W.S. Permanent Jacks from the makers due to the Motor Show.12th Oct 1932Box 26 \ 3  Scan156
Requisition for D.W.S. Jacks for chassis 156-MS and the status of an improved sample.21th Oct 1932Box 26 \ 3  Scan157
Letter received from Cantilever Constructions and asking for direction on how to proceed.25th Oct 1932Box 26 \ 3  Scan158


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