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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With a large 'X' and the repeated abbreviation 'DWG'.28th Sep 1911Box 3 \ 5  05-page014
The testing of the Trier & Martin lighting system and its advantages over the C.A.V. system.28th Sep 1911Box 3 \ 5  05-page015
List of disadvantages concerning a mercury switch, including its junction lag, awkward fixing, and potential for oxidation.21th Dec 1918Box 3 \ 5  05-page016
Letter to Trier & Martin inquiring about their latest dynamo and control methods for a post-war chassis.21th Dec 1918Box 3 \ 5  05-page017
Letter from Trier & Martin redirecting an enquiry for lighting dynamos to their new sales controller, S. Smith & Sons.23th Dec 1918Box 3 \ 5  05-page018
Page from 'The Motor' magazine detailing post-war accessories, including Smith starters, lighting dynamos, and switchboards.31th Dec 1918Box 3 \ 5  05-page019
Article from 'The Motor' magazine describing the Smith's single-jet carburetter for high-speed engines.21th Dec 1918Box 3 \ 5  05-page020
Article detailing new Smith post-war lighting, starting, and combination dashboard accessories.21th Dec 1915Box 3 \ 5  05-page021
Page from 'The Motor' magazine with articles on road care, a Ford assembly scheme, and a new Austin chassis.21th Dec 1918Box 3 \ 5  05-page022
Letter to S. Smith & Sons Ltd. arranging a demonstration of their post-war car lighting and starting system.8th Jan 1919Box 3 \ 5  05-page023
Letter from S. Smith & Sons regarding their range of motor accessories and the takeover of Trier & Martin.6th Jan 1919Box 3 \ 5  05-page024
Letter from S. Smith & Son (Motor Accessories) Ltd. proposing new post-war instruments and accessories.13th Jan 1919Box 3 \ 5  05-page025
Letter from S. Smith & Sons (Motor Accessories) Limited to Rolls-Royce arranging a meeting to discuss post-war equipment.13th Jan 1919Box 3 \ 5  05-page026
Scheduled visits from suppliers regarding post-war chassis electrical equipment.14th Jan 1919Box 3 \ 5  05-page027
The inspection of a dynamo and switch from Messrs. Smith & Son for a 40/50 chassis.15th Jan 1919Box 3 \ 5  05-page028
Constant current control system for a shunt wound machine, with notes on a sample dynamo and instrument fixing methods.15th Jan 1919Box 3 \ 5  05-page029
Letter discussing a potential issue with springs, sending a sample switch and comparing different electrical schemes.15th Jan 1919Box 3 \ 5  05-page030
Letter from S. Smith & Sonsl Ltd. regarding the specifications and supply of a speedometer, watch, and dynamo lighting set.20th Jan 1919Box 3 \ 5  05-page031
Letter from S. Smith & Sons regarding electric lighting equipment and the theory of a dynamo.23th Jan 1918Box 3 \ 5  05-page032
Letter regarding bench tests on a dynamo.18th Feb 1919Box 3 \ 5  05-page033
Urging the delivery of a sample dynamo from S. Smith & Sons and enquiring about C.A.V. dynamos.18th Feb 1919Box 3 \ 5  05-page034
Letter from S. Smith & Sons regarding the successful sourcing of a Weston Mott Ampere Meter and a delay on a new Dynamo sample.19th Feb 1919Box 3 \ 5  05-page035
Letter to Messrs. Smith & Sons regarding a dynamo and a Weston Ammeter.24th Feb 1919Box 3 \ 5  05-page036
Letter from S. Smith & Sons acknowledging receipt of remarks regarding a sample post-war Dynamo.26th Feb 1919Box 3 \ 5  05-page037
Letter from S. Smith & Sons confirming they will send a special dynamo for bench tests.20th Mar 1919Box 3 \ 5  05-page038
Test procedures for charging with a Smith (T & M) Type A Dynamo under various connections.3rd Apr 1919Box 3 \ 5  05-page039
Forwarding a copy of a letter from Messrs. S. Smith & Sons regarding a model 2, 12-volt dynamo being dispatched.9th Apr 1919Box 3 \ 5  05-page040
To Mr Clark detailing the receipt of an accumulator, ammeter, and resistance wire for various experiments.14th Apr 1919Box 3 \ 5  05-page041
Letter from S. Smith & Sons regarding the dispatch of handmade sample head, side and tail lamps for review.14th Apr 1919Box 3 \ 5  05-page042
Dynamos supplied by Messrs. Smith & Son for testing purposes.15th Apr 1919Box 3 \ 5  05-page043
From EY to Mr. Clarke regarding Mr. Royce's strong criticism of dynamo fittings from Smith & Sons.15th Apr 1919Box 3 \ 5  05-page044
Sample head lamps from Messrs. Smith & Sons for evaluation by the Experimental Department.18th Apr 1919Box 3 \ 5  05-page045
Correspondence regarding the dispatch of a 12-volt Dynamo, a rotary switch, and a delay in a set of lamps.7th Apr 1919Box 3 \ 5  05-page046
Lighting installation, discussing Weston meters, cut-outs, and modifications to a Bijur dynamo for experiments.25th Apr 1919Box 3 \ 5  05-page047
Delivery and examination of various car lamps supplied by Smiths.28th Apr 1919Box 3 \ 5  05-page048
Letter to Messrs. Smith & Sons regarding the return and testing of a submitted lighting set, accumulator, instruments, and dynamos.1st May 1919Box 3 \ 5  05-page049
Sending a lighting set and battery to the Despatch Stores for return to Messrs. Smith & Sons.1st May 1919Box 3 \ 5  05-page050
Letter from S. Smith & Sons Ltd. regarding lamps, lighting equipment, and instrument boards.8th May 1919Box 3 \ 5  05-page051
Letter from S. Smith & Son (Motor Accessories) Ltd. regarding the supply and potential modification of dynamos.5th May 1919Box 3 \ 5  05-page052
Returning sample speedometer and clock instruments supplied by Messrs. Smith & Sons.5th May 1919Box 3 \ 5  05-page053
Letter from S. Smith & Sons confirming receipt of a sample Lamp and Battery and that credit is being passed.7th May 1919Box 3 \ 5  05-page054
Letter to Messrs. Smith & Sons regarding instrument boards and the examination of dynamos.9th May 1919Box 3 \ 5  05-page055
The Smith (T & M) Type A and Type 3A dynamos supplied by S. Smith & Sons.12th May 1919Box 3 \ 5  05-page056
Comparative performance report on dynamo machines and a cut-out, comparing them to models from Lucas and C.A.V.12th May 1919Box 3 \ 5  05-page057
Continuation of a report comparing the performance and components of various dynamos.12th May 1919Box 3 \ 5  05-page058
Specification sheet comparing Smith (T & M) 12 Volt Chassis Dynamos, Type A and Type 3A.12th May 1919Box 3 \ 5  05-page059
Performance curves for a Kestrel XI B engine, showing B.HP and fuel consumption against R.P.M.19th Mar 1926Box 3 \ 5  05-page060
Comparative output curve graph for C.A.V. & R.R., Lucas E3YE, and Smith (T&M) Type A dynamos.14th May 1919Box 3 \ 5  05-page061
Letter from S. Smith & Sons acknowledging remarks regarding an instrument board and dynamos.14th May 1919Box 3 \ 5  05-page062
Distribution and return of sample apparatus from Messrs. Smith & Sons.15th May 1919Box 3 \ 5  05-page063
Sending a proof copy of a letter to Messrs. Smith regarding dynamo lighting equipment.15th May 1919Box 3 \ 5  05-page064
Suggesting modifications to a draft communication with Smith regarding the assessment of their dynamo lighting equipment.16th May 1919Box 3 \ 5  05-page065
Letter to S. Smith & Sons detailing the test results of a Type 3A dynamo and its subsequent return.19th May 1919Box 3 \ 5  05-page066
Technical assessment of a Type A Dynamo, detailing its electrical performance and manufacturing quality.19th May 1919Box 3 \ 5  05-page067
The concluding page of a letter discussing confidential inter-communication for mutual benefit.20th May 1919Box 3 \ 5  05-page068
Letter from S. Smith & Sons regarding an Electrical Engineer's visit to discuss Commutator construction.20th May 1919Box 3 \ 5  05-page069
Follow-up letter to Messrs. S. Smith & Sons regarding a previous letter and arranging an engineer's visit.21th May 1919Box 3 \ 5  05-page070
Letter from S. Smith & Sons regarding the performance and testing of a Dynamo and Cutout.22th May 1919Box 3 \ 5  05-page071
Letter from S. Smith & Sons regarding sparking auxiliary brushes on a machine and arranging a works visit.12th May 1919Box 3 \ 5  05-page072
Letter from Smith & Sons about dynamo tests and arranging an interview.21th May 1919Box 3 \ 5  05-page073
Internal request to the Print Room for two prints of Smith (T & M) Dynamo tracings.22th May 1919Box 3 \ 5  05-page074
Potential meeting about the Smith Dynamo and Instrument.24th May 1919Box 3 \ 5  05-page075
Letter to Messrs. Smith & Sons enclosing blueprint performance curves for two dynamo types, A and 3A.27th May 1919Box 3 \ 5  05-page076
Letter from motor accessory manufacturer S. Smith & Sons regarding blue print curves for two dynamos on test.28th May 1919Box 3 \ 5  05-page077
Request to supply a photostat copy of a sketch for a Smith (T & M) Dynamo.17th Jun 1919Box 3 \ 5  05-page078
Request to the Print Room for photostat copies of sheets of curves for a Smith (T & M) Dynamo.30th Jun 1919Box 3 \ 5  05-page079
Request to the Print Room for nine half-size photostat copies of a sheet of curves for the Smith (T & M) Dynamo.30th Jun 1919Box 3 \ 5  05-page080
Advantages of a new dynamo from Smiths over existing Lucas or C.A.V. models.30th Jul 1919Box 3 \ 5  05-page081
Explaining the theory of action of the 'Smith' constant current dynamo.30th Jul 1919Box 3 \ 5  05-page082
Hand-drawn diagram of a dynamo, likely a Gramme-ring type, illustrating its electrical conditions at no load.30th Jul 1919Box 3 \ 5  05-page083
Diagram and explanation of the effects of increased speed on current and magnetic flux in an electrical dynamo or motor.30th Jul 1919Box 3 \ 5  05-page084
Page discussing the demagnetizing action of an armature and its effect on an output curve.30th Jul 1919Box 3 \ 5  05-page085
Calculation to find the current distribution in an armature for minimum power loss.30th Jul 1919Box 3 \ 5  05-page086
Mathematical comparison of electrical loss between an S. Smith & Sons dynamo and an ordinary dynamo.8th Aug 1919Box 3 \ 5  05-page087
Letter to Smith & Sons Ltd. regarding the performance and future supply of their Type A chassis lighting dynamo.8th Aug 1919Box 3 \ 5  05-page088
Hand-drawn schematic showing the arrangement of poles, armature and brushes for a Smith Type A. Dynamo.9th Aug 1919Box 3 \ 5  05-page089
Letter from S. Smith & Sons (M.A) Ltd acknowledging a letter regarding a Chassis Lighting Dynamo.9th Aug 1919Box 3 \ 5  05-page090
Letter from S. Smith & Sons regarding a special chassis lighting dynamo.11th Aug 1919Box 3 \ 5  05-page091
Letter from S. Smith & Sons regarding a new Dynamo, inviting Mr. Fowler Clarke to see it under test at their factory.13th Aug 1919Box 3 \ 5  05-page092
The Smith (T & M) Type 'A' Dynamo.13th Aug 1919Box 3 \ 5  05-page093
Hand-drawn schematic diagram of a dynamo or motor showing poles, armature, and wiring.20th Apr 1937Box 3 \ 5  05-page094
Description of the electrical currents and forces within a dynamo and armature system during startup.13th Aug 1919Box 3 \ 5  05-page095
Technical explanation of the operation of a shunt dynamo, focusing on current, auxiliary brushes, and resistance circuits.13th Aug 1919Box 3 \ 5  05-page096
Technical description of the action of a dynamo, focusing on brush systems and current characteristics.13th Aug 1919Box 3 \ 5  05-page097
The characteristics and testing procedures for the Smith type 'A' dynamo.13th Aug 1919Box 3 \ 5  05-page098
Performance analysis of a dynamo, comparing its characteristics to other models and detailing various output curves.22th Feb 1919Box 3 \ 5  05-page099
Analysis and comparison of C.A.V., Lucas, and Smith lighting dynamos.13th Aug 1919Box 3 \ 5  05-page100
Comparison between Smith and Lucas dynamos regarding circuit protection and future supply.13th Aug 1919Box 3 \ 5  05-page101
Graph of open circuit voltage curves for a Smith (T&M) Type A Dynamo with separate excitation.13th Jun 1917Box 3 \ 5  05-page102
Graph showing the open-circuit voltage curves for a Smith (T&M) Type A Dynamo with self-excitation.24th Jun 1914Box 3 \ 5  05-page103
Graph of output-speed curves for a Smith (T&M) Type A Dynamo with various cell configurations.26th May 1919Box 3 \ 5  05-page104
Graph showing the output, field, and control current curves for a Smith Type A Dynamo with varying numbers of cells.29th Sep 1920Box 3 \ 5  05-page105
Data table and diagram showing the currents for a Smith (T & M) Type 'A' Dynamo.1st Jul 1919Box 3 \ 5  05-page106
Analysis of results of tests of lighting dynamos.1st Jul 1919Box 3 \ 5  05-page107
Comparison of amperage output for different electrical components under shunt wound and normal conditions.14th Aug 1919Box 3 \ 5  05-page108
Request to the Print Room for eight photostat copies of a sheet of curves.14th Aug 1919Box 3 \ 5  05-page109
Sending one 'Smith Cut-Out' to Mr. Royce for his inspection.18th Aug 1919Box 3 \ 5  05-page110
Letter to Messrs. Smith & Sons regarding a visit to see a new chassis lighting dynamo on test.20th May 1919Box 3 \ 5  05-page111
Report on the Smith (T & M) Type 'A' Dynamo and suggesting further testing protocols.19th Aug 1919Box 3 \ 5  05-page112
Comparison of Smith (T & M) and Lucas Type 'A' dynamos.27th Aug 1919Box 3 \ 5  05-page113


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