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 setup and parameters for a temporary non-trembler ignition system on chassis 7 CA.10th Dec 1918Box 34 \ 1  Scan027
Technical discussion comparing different types of trembler and chassis coils for an ignition system.10th Dec 1918Box 34 \ 1  Scan028
The performance of a distributor arm and experiments with condensers for spark suppression.10th Dec 1918Box 34 \ 1  Scan029
Condenser design and the beneficial effects of adding a high tension wire to suppress flashing at the primary points.26th Apr 1917Box 34 \ 1  Scan030
Effects of adding a high-tension coil to an ignition system to reduce sparking.26th Apr 1917Box 34 \ 1  Scan031
Test data sheet for various ignition coils on a chassis ignition contact breaker.10th Dec 1918Box 34 \ 1  Scan032
Request to produce four small ignition condensers for experiments with specific dimensions.12th Dec 1918Box 34 \ 1  Scan033
Modifications to a non-trembler battery ignition system for a post-war chassis.13th Dec 1918Box 34 \ 1  Scan034
Technical note on updating the battery ignition system, including a suggestion from Mr. Royce.18th Dec 1918Box 34 \ 1  Scan035
Extract detailing the specified position of the distributing box on the dashboard.18th Dec 1918Box 34 \ 1  Scan036
Confirming modifications to the battery ignition system for chassis 49-GB.20th Dec 1918Box 34 \ 1  Scan037
Modifying instructions for the production of condensers for battery ignition systems.3rd Jan 1919Box 34 \ 1  Scan038
Confirming the production of two condensers for battery ignition and instructions for two more.6th Jan 1919Box 34 \ 1  Scan039
Ordering mica plates and investigating their thickness to improve the capacity of condensers for battery ignition.8th Jan 1919Box 34 \ 1  Scan040
Expressing anxiety over the reliability of a single spark non-trembler ignition coil scheme.14th Jan 1919Box 34 \ 1  Scan041
Table listing the approximate capacities in microfarads of various experimental condensers.16th Jan 1919Box 34 \ 1  Scan042
The performance of ignition coils and contact breakers, detailing current consumption and mechanical operation.4th Feb 1919Box 34 \ 1  Scan043
Continued report on testing 'B' coil and ballast lamp configurations for a vehicle's electrical system.4th Feb 1919Box 34 \ 1  Scan044
Requesting a pattern and six castings be made for a Condenser Casing.18th Mar 1919Box 34 \ 1  Scan045
Drawings for Mica and Tinfoil plates and arranging for the manufacture of dies for a condenser.18th Mar 1919Box 34 \ 1  Scan046
Components for manufacturing five different condensers for battery ignition.18th Mar 1919Box 34 \ 1  Scan047
Internal memorandum regarding the design, drawings, and production of a condenser for battery ignition.1st Apr 1919Box 34 \ 1  Scan048
Technical memo discussing design updates for shock dampers, back axle, brakes, and ignition systems.1st May 1919Box 34 \ 1  Scan049
Obtaining quotations for 250 sets of condensers for the 40/50 HP chassis from an outside firm.13th May 1919Box 34 \ 1  Scan050
Handover of 'A' and 'E' type condensers for testing.14th May 1919Box 34 \ 1  Scan051
Urging the finalization of the chassis condenser's capacity without further delay.15th May 1919Box 34 \ 1  Scan052
Measured capacities of two battery ignition condensers and the required capacity for the standard condenser.16th Mar 1919Box 34 \ 1  Scan053
Clarifying the required capacity for a chassis battery ignition condenser.19th May 1919Box 34 \ 1  Scan054
Confirmation of a telegram from Royce to Barrington about ballast resistance and a condenser for the Forty Fifty model.20th May 1919Box 34 \ 1  Scan055
Confirmation of a telegram regarding an objection to a spiral spring connection for a condenser.29th May 1919Box 34 \ 1  Scan056
Telegram from Mr. Barrington to Mr. Royce concerning design changes and production issues for ballast resistance and condensers.16th Apr 1919Box 34 \ 1  Scan057
Telegram from Royce discussing the design of a condenser, ballast resistance, and distributor box.10th Apr 1919Box 34 \ 1  Scan058
Internal memorandum discussing production changes for condensers on the 40/50 HP chassis.23th May 1919Box 34 \ 1  Scan059
Continued memo discussing the incorporation of a new design instead of attempting to fix the original.23th May 1919Box 34 \ 1  Scan060
Material choices and issues like contact splashing for a condenser in a battery ignition system.27th May 1919Box 34 \ 1  Scan061
Report calculating the frequency of oscillations in a circuit with a condenser and a lamp.27th May 1919Box 34 \ 1  Scan062
Cancelling an order for 250 old-type condenser sets and instructing to proceed with a new design.28th May 1919Box 34 \ 1  Scan063
Progress on experimental condensers and vibrator regulators for the chassis electrical outfit.30th May 1919Box 34 \ 1  Scan064
Print of a condenser for the 40/50 H.P+ Chassis.4th Jun 1919Box 34 \ 1  Scan065
Requesting enquiries be made for an electrical instrument to measure condenser capacities.4th Jun 1919Box 34 \ 1  Scan066
Sourcing difficulties for electrical ignition condensers and vibratory regulators for dynamos.11th Jun 1919Box 34 \ 1  Scan067
Measurement of condenser capacities by Weston A.C. Milli-ammeter.30th Jun 1919Box 34 \ 1  Scan068
Continued list of test readings for various condensers, showing corrected readings, differences, and capacity.24th Jul 1919Box 34 \ 1  Scan069
Seven-step testing procedure for a condenser.24th Jul 1919Box 34 \ 1  Scan070
Failures in chassis type condensers due to cracks in mica plates and proposing ordering pre-cut plates for experimentation.28th Jul 1919Box 34 \ 1  Scan071
Testing procedures and reliability of condensers for chassis.28th Jul 1919Box 34 \ 1  Scan072
Supply of condensers and the repair of a broken ignition condenser for use as a standard.28th Jul 1919Box 34 \ 1  Scan073
Confirmation to order 1500 mica condenser plates and obtain magneto condensers for comparative testing.28th Jul 1919Box 34 \ 1  Scan074
Extract from a report detailing an electrical fault caused by a failed condenser on Chassis 1 EX.28th Jul 1919Box 34 \ 1  Scan075
Letter from The General Electric Co Ltd regarding enquiries for potential transformers.28th Jul 1919Box 34 \ 1  Scan076
The electrical requirements and testing for condensers supplied by G.E.C.1st Aug 1919Box 34 \ 1  Scan077
Letter to The General Electric Co. Ltd. outlining the testing requirements for condensers.1st Aug 1919Box 34 \ 1  Scan078
Progress report on the experimental construction and testing of condensers for battery ignition systems.1st Aug 1919Box 34 \ 1  Scan079
The testing of condensers and experimentation with different varnishes for insulation.1st Aug 1919Box 34 \ 1  Scan080
Continued page of a memorandum or report, being page 3.1st Aug 1919Box 34 \ 1  Scan081
Communicating special test requirements for condensers to the manufacturer, General Electric Company.5th Aug 1919Box 34 \ 1  Scan082
Instruction sheet detailing amperage readings for different types of condensers at 225 volts.5th Aug 1919Box 34 \ 1  Scan083
Instruction sheet with calculations for electrical capacitance values.7th Feb 1917Box 34 \ 1  Scan084
Test report for three condensers, including readings, calculations, and approval for fitting.5th Aug 1919Box 34 \ 1  Scan085
Instruction note to Mr Clark detailing the successful testing and capacitance values of two condensers marked D & E.6th Aug 1919Box 34 \ 1  Scan086
Advice note from The General Electric Co., Ltd. for a condenser sample.6th Aug 1919Box 34 \ 1  Scan087
Test report on a modified G.E.C. condenser which showed signs of failure under a 350-volt load.9th Apr 1919Box 34 \ 1  Scan088
Instruction sheet detailing an issue with plates not making good contact and a plan to test condensers.9th Apr 1919Box 34 \ 1  Scan089
Request for a report on a sample condenser required by the General Electric Co. before they can proceed with manufacture.11th Aug 1919Box 34 \ 1  Scan090
Letter from The General Electric Co Ltd regarding a sample condenser dispatched for testing.6th Aug 1919Box 34 \ 1  Scan091
The testing of a sample chassis ignition condenser from G.E.C.12th Aug 1919Box 34 \ 1  Scan092
Typed letter to The British Mica Co. Ltd. arranging an interview with their Mr. Hill.12th Aug 1919Box 34 \ 1  Scan093
Request for the return of 5 tested condensers, as they are urgently needed for production.12th Aug 1919Box 34 \ 1  Scan094
Order for 1500 mica condenser plates to drawing N.786.13th Aug 1919Box 34 \ 1  Scan095
Confirming five condensers have passed testing and are suitable for production chassis.13th Aug 1919Box 34 \ 1  Scan096
Testing and specifications of two new condensers.13th Aug 1919Box 34 \ 1  Scan097
Specification for condensers being made in the Experimental Department for production chassis.16th Aug 1919Box 34 \ 1  Scan098
Confirmation memo regarding three condensers that have passed tests and are suitable for production chassis.16th Aug 1919Box 34 \ 1  Scan099
The testing of two new condensers, noting their capacities and comparison to a G.E.C. model.18th Aug 1919Box 34 \ 1  Scan100
The manufacture and capacity testing of several condensers.18th Aug 1919Box 34 \ 1  Scan101
Improvements in condenser construction, leading to a smaller condenser box design.18th Aug 1919Box 34 \ 1  Scan102
The modified assembly operations for building up condensers.18th Aug 1919Box 34 \ 1  Scan103
The manufacture and modification of several condensers, detailing their capacities and dimensions.20th Aug 1919Box 34 \ 1  Scan104
Ignition system improvements for car 1 EX, including spring materials and magneto accessibility.21th Aug 1919Box 34 \ 1  Scan105
Delay in condenser supply from the General Electric Company and a proposal for an interim order.1st Aug 1919Box 34 \ 1  Scan106
Log sheet for recording measurements and remarks for production condensers.22th Aug 1919Box 34 \ 1  Scan107
5 thin type condensers handed to production with unmodified cases.23th Aug 1919Box 34 \ 1  Scan108
Requesting an alteration to reduce the depth of the condenser casing for the make and break gear.25th Aug 1919Box 34 \ 1  Scan109
List of new parts for the 40/50 chassis, detailing changes compared to the pre-war 40/50 HP chassis.27th Aug 1919Box 34 \ 1  Scan110
Procedure detailing the testing process for production condensers.29th Aug 1919Box 34 \ 1  Scan111
Distributing two copies of the revised and final specification for Production Condenser Tests.30th Aug 1919Box 34 \ 1  Scan112
Confirming receipt of 4 condensers and requesting the chassis details they are for.1st Sep 1919Box 34 \ 1  Scan113
Change of varnish for condensers and the creation of new fixtures to improve production.2nd Sep 1919Box 34 \ 1  Scan114
The status of production testing for various electrical components.30th Sep 1919Box 34 \ 1  Scan115
Test results and calculations for auxiliary and chassis condensers.7th Oct 1919Box 34 \ 1  Scan116
Handing over condenser testing apparatus and raising concerns about potential production issues from acid vapours.8th Oct 1919Box 34 \ 1  Scan117
Recommendation to move condenser manufacturing to a more suitable place due to dust contamination.8th Oct 1919Box 34 \ 1  Scan118
From EFC to Mr. Coverley requesting the remaking of condenser R.R.12 and another similar condenser.9th Oct 1919Box 34 \ 1  Scan119
Outlining eight required conditions for a dedicated condenser manufacturing room.11th Oct 1919Box 34 \ 1  Scan120
Procedure for testing condensers before use on a chassis.11th Oct 1919Box 34 \ 1  Scan121
Requesting a condenser spring, previously made of steel, now be made in bronze to prevent rust.16th Oct 1919Box 34 \ 1  Scan122
Confirming the condenser contact spring material has been changed to Silicon Bronze as standard.20th Oct 1919Box 34 \ 1  Scan123
Confirming that silicon bronze springs are now standard on all experimental cars.21th Oct 1919Box 34 \ 1  Scan124
Accompanying a second sample condenser from the General Electric Co. for evaluation.25th Oct 1919Box 34 \ 1  Scan125
Alternative condenser design for battery ignition proposed by the General Electric Company.27th Oct 1919Box 34 \ 1  Scan126


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