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
Inter-office correspondence regarding component noise from Bijur and the testing of new electrical parts.19th Jul 1921Box 163 \ 7  img031
Examination of various American switch boxes with a recommendation to adopt the Delco from the Marmon car.22th Jul 1921Box 163 \ 7  img032
Design and placement of dashboard electrical components like switches, buzzers, and fuses.22th Jul 1921Box 163 \ 7  img033
Note about the circuit placement of a buzzer versus fuses, referencing a wiring diagram to follow.22th Jul 1921Box 163 \ 7  img034
Letter from Delco-Remy promoting their ignition equipment by listing recent motor race results.6th Aug 1921Box 163 \ 7  img035
Inter-office letter discussing proposals from Delco for ignition parts to replace the existing magneto system.3rd Aug 1921Box 163 \ 7  img036
Sourcing difficulties for a dual ignition set from American Bosch and considering a Delco alternative.14th Jan 1919Box 163 \ 7  img037
Blueprint showing top and side elevation views of a mechanical component.14th Jan 1919Box 163 \ 7  img038
Blueprint detailing the outline and dimensions of an ignition coil.8th Jan 1919Box 163 \ 7  img039
Letter concerning issues with American ignition parts, specifically the Bijur Distributor Board and Delco Switch.16th Nov 1921Box 163 \ 7  img040
Letter from Delco-Remy Ltd. detailing the success of their ignition systems at the Indianapolis 500 and Grand Prix des Voiturettes.22th Sep 1921Box 163 \ 7  img041
Reprint from 'Motor Commerce' magazine detailing Delco-Remy ignition sets and trends.24th Sep 1921Box 163 \ 7  img042
Comparison of Delco-Remy standard ignition outfits for well-known British and American engines.16th Jun 1922Box 163 \ 7  img043
Letter from Delco-Remy Ltd. detailing the success of their coil ignition system in motor racing.16th Jun 1922Box 163 \ 7  img044
Letter from Delco-Remy Ltd. regarding an enclosed article on the success of their DELCO and REMY ignition sets.4th Oct 1921Box 163 \ 7  img045
Internal request to obtain a competitor's Delco-Remy battery ignition system for comparison.26th Aug 1925Box 163 \ 7  img046
Letter from Delco-Remy & Hyatt Ltd. responding to an enquiry about coil ignition equipment for a 6-cylinder chassis.2nd Sep 1925Box 163 \ 7  img047
Requirement for automatic control on a Delco-Remy battery ignition system.3rd Sep 1925Box 163 \ 7  img048
Quotation from Delco Remy & Hyatt Ltd. for ignition equipment.4th Sep 1925Box 163 \ 7  img049
Quotation from Delco-Remy & Hyatt Ltd. for ignition equipment.7th Sep 1925Box 163 \ 7  img050
Requirement for automatic advance control on a Delco-Remy battery ignition distributor.7th Sep 1925Box 163 \ 7  img051
Request to purchase Delco-Remy semi-automatic control type battery ignition equipment.2nd Sep 1925Box 163 \ 7  img052
Query regarding a special order for a clockwise rotating distributor for a Delco-Remy Battery Ignition system.21th Sep 1925Box 163 \ 7  img053
Communication regarding the supply of a Delco-Remy distributor and ignition coil.28th Sep 1925Box 163 \ 7  img054
Clarifying part numbers for a Coil and Distributor from supplier Delco Remy & Hyatt Ltd.23th Oct 1925Box 163 \ 7  img055
Letter from Delco-Remy & Hyatt Ltd. confirming dispatch of ignition equipment and correcting an ignition coil model number.21th Oct 1925Box 163 \ 7  img056
Testing of a Delco-Remy ignition unit.2nd Nov 1925Box 163 \ 7  img057
Inspection and comparison report on a Delco-Remy 12-volt ignition system.3rd Nov 1925Box 163 \ 7  img058
Technical comparison of ballast resistance, primary winding resistance, and inductance in a coil and distributor system.3rd Nov 1925Box 163 \ 7  img059
Technical breakdown and analysis of the features of a Delco-Remy Distributor, Model 5249.26th Oct 1925Box 163 \ 7  img060
Specification sheet for a ballast resistance component and its associated assembly.2nd Nov 1925Box 163 \ 7  img061
The specifications and testing of Delco Coil No. 2178.2nd Nov 1925Box 163 \ 7  img062
Instruction sheet detailing a 10,000-mile bench test on a Delco-Remy distributor.26th Mar 1926Box 163 \ 7  img063
Inspection report on the condition and function of a distributor.29th Aug 1920Box 163 \ 7  img064
Instructions regarding the testing of a noisy distributor and associated ignition components.29th Jun 1920Box 163 \ 7  img065
Observation noting that the Remy distributor's offset contact points prevent pitting and blackening from centrifugally thrown oil, unlike the standard distributor.19th May 1926Box 163 \ 7  img066
Instruction note about inevitable deposits on points causing pitting and blackening.29th Jun 1920Box 163 \ 7  img067
Laboratory note regarding photomicrographs of Remy ignition tungsten contacts after a bench test.30th Mar 1926Box 163 \ 7  img068
Request for an analysis of two samples of ballast resistance wire.14th Jun 1926Box 163 \ 7  img069
Particulars of ballast resistance from a Delco-Remy unit in the lab.14th Jun 1926Box 163 \ 7  img070
Chemical analysis report for two samples of Ballast Resistance Wire.16th Jun 1926Box 163 \ 7  img071
Comparing a Delco Remy ignition contact breaker unit and coil against an in-house design, focusing on spark energy.11th Jul 1926Box 163 \ 7  img072
Technical discussion regarding coils with nearly closed magnetic circuits and trouble with contact points.1st Jul 1926Box 163 \ 7  img073
The 10,000-mile bench test of a Delco-Remy distributor.26th Mar 1926Box 163 \ 7  img074
Laboratory observation comparing the Remy distributor to the standard distributor regarding contact point pitting due to oil.19th May 1926Box 163 \ 7  img075
Doming of two Delco-Remy tungsten ignition contact points.6th Jul 1926Box 163 \ 7  img076
Requesting the doming of a pair of Delco Remy ignition contact points.11th Aug 1926Box 163 \ 7  img077
Letter from W.H. Reynolds & Co. discussing the condition and purity of tungsten contacts after examination.27th Aug 1926Box 163 \ 7  img078
Results of an assay on tungsten contact points and proposing further comparative tests between Remy and RR-Reynold parts.1st Sep 1926Box 163 \ 7  img079
Instructions detailing the ascertained capacity of a condenser and observations about its construction.29th Jun 1920Box 163 \ 7  img080
Experimental improvements to the battery ignition contact breaker unit.18th Sep 1926Box 163 \ 7  img081
Construction of a Delco coil in comparison to an American Bosch coil for experimental purposes.11th Nov 1926Box 163 \ 7  img082
Cross-sectional diagram of a Delco ignition coil showing part numbers and internal components.10th Nov 1926Box 163 \ 7  img083
Blueprint for an Ignition Coil Assembly with handwritten part numbers and annotations.10th Nov 1926Box 163 \ 7  img084
Observations of sample ignition contact points, comparing platinum and tungsten types.31th Dec 1926Box 163 \ 7  img085
The wear of tungsten and platinum ignition contact breaker points due to the presence of oil vapour.31th Dec 1926Box 163 \ 7  img086
Performance of platinum and tungsten contact points in a battery ignition system compared to a competitor's.10th Jan 1927Box 163 \ 7  img087
Despatching sample battery ignition contact points and a Delco-Remy distributor for testing.1st Jan 1927Box 163 \ 7  img088
Sending distributor and contact breaker units to Mr. Elliott for inspection.14th Jan 1927Box 163 \ 7  img089
From 'E' to 'EFC' regarding a sample Delco-Remy contact breaker for battery ignition.12th Jan 1927Box 163 \ 7  img090
Potential improvements to the battery ignition contact breaker by comparing it to Delco-Remy levers.13th Jan 1927Box 163 \ 7  img091
Sending Delco-Remy and American Bosch ignition components for inspection and testing.14th Jan 1927Box 163 \ 7  img092
Examination and comparison of Bosch and Delco Remy contact breakers, focusing on the angular off-set.17th Jan 1927Box 163 \ 7  img093
Comparison of flexibility and contact pressure for Bosch, Remy, and RR 20 HP ignition systems.17th Jan 1927Box 163 \ 7  img094
Design sketch and explanation for an umbrella rotor concerning air circulation.24th Feb 1927Box 163 \ 7  img095
Arguing in favor of using tungsten for battery ignition contact points.24th Feb 1927Box 163 \ 7  img096
Use of tungsten, interchangeability of contact breaker points, and the design of contact makers for battery ignition systems.23th Feb 1927Box 163 \ 7  img097
Interchangeability of battery ignition contact points with parts from Delco.28th Feb 1927Box 163 \ 7  img098
Requesting the return of a Delco-Remy contact breaker and distributor unit.2nd Mar 1927Box 163 \ 7  img099
Standardisation and design of battery ignition contact breaker points, comparing tungsten and platinum.4th Mar 1927Box 163 \ 7  img100
Technical analysis of ignition system performance, considering current, condenser capacity, and platinum point life.4th Mar 1927Box 163 \ 7  img101
Confirming the return of a Delco Remy contact breaker and distributor.7th Mar 1927Box 163 \ 7  img102
Comparison of Delco-Remy and U.S.A. Bosch ignition systems.29th Aug 1927Box 163 \ 7  img103
Comparing different ignition contact point systems and the performance of platinum versus tungsten points.31th Aug 1927Box 163 \ 7  img104
Standardising tungsten points over platinum points based on test results and customer feedback.31th Aug 1927Box 163 \ 7  img105
The procurement of two additional contact lever springs for a Delco-Remy ignition distributor.31th Aug 1927Box 163 \ 7  img106
The testing and standardisation of Tungsten Ignition Contact Points.9th Sep 1927Box 163 \ 7  img107
Comparative tests of contact breaker points, including standard tungsten, Remy, and U.S.A. Bosch types.6th Oct 1927Box 163 \ 7  img108
Comparing the performance and testing of De Jon, U.S.A. Bosch, and Delco-Remy battery ignition systems.6th Oct 1927Box 163 \ 7  img109
Experiments and developments in ignition systems, including contact breakers, coils, and comparisons with Bosch and Delco-Remy units.10th Oct 1927Box 163 \ 7  img110
The design and performance of ignition coils, comparing coils with and without ballast resistance.1st Oct 1927Box 163 \ 7  img111
Note on the Delco Remy ignition system for the Stutz, discussing coil resistance.1st Dec 1927Box 163 \ 7  img112
Blank graph template for plotting Make Ratio against Distributor values.1st Dec 1927Box 163 \ 7  img113
Graph showing make ratio-speed curves for a Delco-Remy Distributor, model 5249.1st Dec 1927Box 163 \ 7  img114
Graph plotting the make ratio-speed curves for a Delco-Remy distributor, model 5249.7th Mar 1928Box 163 \ 7  img115
Suggesting the dismantling of two American coils, Delco Remy and U.S.A. Bosch, to observe their construction.7th Mar 1928Box 163 \ 7  img116
Test log for a Delco-Remy distributor complete with ballast resistance and automatic advance.5th Oct 1926Box 163 \ 7  img117
Electrical experimental record sheet for a Delco-Remy distributor.19th Apr 1926Box 163 \ 7  img118
Letter responding to a query about the development of ignition coils and contact breakers, detailing the balance between current, contact point wear, and coil heating.17th May 1929Box 163 \ 7  img119
Technical letter discussing the effects of current heating on ignition coil insulation and the use of ballast resistance.14th May 1930Box 163 \ 7  img120
Performance of a Delco Remy ignition contact breaker on a Chrysler.14th May 1930Box 163 \ 7  img121
Requesting the acquisition of a Delco Remy 6-cylinder distributor and 12-volt ignition coil for testing.2nd Jul 1930Box 163 \ 7  img122
Extract from a letter to Delco-Remy & Hyatt Ltd. detailing the specifications of a supplied distributor.9th Jul 1930Box 163 \ 7  img123
Examination and analysis of a Delco-Remy condenser, including its capacity, dimensions, and construction.2nd Oct 1930Box 163 \ 7  img124
Description of a condenser design, detailing its construction and suggesting an alternative manufacturing practice.10th Oct 1930Box 163 \ 7  img125
Test report detailing the design and construction of an experimental coil.10th Oct 1930Box 163 \ 7  img126
Test report detailing the electrical properties of windings, including resistance, impedance, and circuit tests.10th Oct 1930Box 163 \ 7  img127
Test results page detailing secondary resistance, temperature, current, and speed measurements.10th Oct 1930Box 163 \ 7  img128
Test results report detailing voltage, RPM, and gap performance, with remarks on a Delco-Remy distributor test.10th Oct 1930Box 163 \ 7  img129
Failure of a coil and the subsequent examination of its windings.20th Oct 1930Box 163 \ 7  img130


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