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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Comparing the Lucas horns and their fittings on Phantom III models 32-EX, 26.G.VI, and 37-EX.4th Aug 1937Box 166 \ 9  img127
Non-standard screws and horns fitted to a Phantom III.4th Aug 1937Box 166 \ 9  img128
Cancelled internal request to obtain one pair of W.T.13 horns from Messrs Lucas for the Phantom III Chassis.10th Aug 1937Box 166 \ 9  img129
Requesting approval to detail a modified horn button for the PH.III and Wraith models.13th Aug 1937Box 166 \ 9  img130
Modifications and issues with Lucas WT. Horns, comparing the WT.11X and WT.13 types.19th Aug 1937Box 166 \ 9  img131
To cancel an order for one pair of Lucas WT.13 horns as they are not currently in production.8th Sep 1937Box 166 \ 9  img132
Notice to cancel an order for Phantom III Chassis Horns as the part is no longer in production.10th Sep 1937Box 166 \ 9  img133
Modification to the Phantom III horn brackets to prevent fracturing.15th Sep 1937Box 166 \ 9  img134
Letter to Lucas Ltd. requesting clarification on modifications to a pair of wind-tone horns supplied for testing.15th Sep 1937Box 166 \ 9  img135
Letter discussing progress on the R.R.P.100 'Open' type headlamps and their special glass.21th Sep 1937Box 166 \ 9  img136
Letter from Joseph Lucas Limited clarifying the differences between the WT13 and WT11 horns.21th Sep 1937Box 166 \ 9  img137
Letter from Joseph Lucas Limited discussing alterations to a component, specifically the diaphragm frequency, flare position, and trumpet slots.21th Sep 1937Box 166 \ 9  img138
Letter to Joseph Lucas Ltd. regarding test results for WT.13 horns and a delay in testing LRT.7 regulators.5th Oct 1937Box 166 \ 9  img139
The conclusion of a letter detailing the adjustment of a component to its lowest limit of 12.2 volts.5th Oct 1937Box 166 \ 9  img140
Request to dispatch one pair of Lucas W.T.13 type horns to be brought up to date.5th Oct 1937Box 166 \ 9  img141
Letter from Joseph Lucas Limited regarding the performance and return of a horn and a regulator.7th Oct 1937Box 166 \ 9  img142
Returning a pair of Lucas W.T.13 type horns to be brought up to date.7th Oct 1937Box 166 \ 9  img143
Request to remove experimental Lucas W.T.13 type horns from cars 33-EX and 36-EX.12th Oct 1937Box 166 \ 9  img144
The return of two pairs of Lucas W.T.13 horns for modification.18th Oct 1937Box 166 \ 9  img145
The return of two pairs of Lucas W.T.13 horns for modification.18th Oct 1937Box 166 \ 9  img146
Revised and simplified horn switch for the Wraith III model.20th Oct 1937Box 166 \ 9  img147
Blueprints and production notes for the Wraith III Horn Switch.3rd Nov 1937Box 166 \ 9  img148
The fitting of experimental Lucas wind horns to specific vehicles.10th Nov 1937Box 166 \ 9  img149
The receipt and fitting of modified Lucas W.T.13 horns for testing on two cars.19th Nov 1937Box 166 \ 9  img150
The return of six pairs of Lucas WT.11.X Wind Tone horns for renovation and stocking.4th Dec 1937Box 166 \ 9  img151
Return of Lucas Wind Tone horns for renovation instead of scrapping.7th Dec 1937Box 166 \ 9  img152
Testing and standardisation of Lucas WT.13 type horns.13th Jan 1938Box 166 \ 9  img153
Requesting a covering order for two pairs of Lucas W.T.13 type windtone horns.28th Jan 1938Box 166 \ 9  img154
Investigation into the lack of reliability of Lucas 'Mellotone' Electric Horns.14th Feb 1938Box 166 \ 9  img155
Advertisement for 'The Powerfully Polite' Mellow Tone Clear-Hooter car horns.24th Feb 1937Box 166 \ 9  img156
Letter from Clear Hooters Ltd offering electric horns for original equipment.22th Feb 1938Box 166 \ 9  img157
Advertisement for Clear Hooters high-frequency electric horns, models H.F. 500 and H.F. 180.28th Feb 1938Box 166 \ 9  img158
Requesting to change the Windstone horns on specific vehicles due to their ugly frontal appearance.28th Feb 1938Box 166 \ 9  img159
Request to obtain a pair of De-Luxe Mellow Tone horns on loan from Clear-Hooters.1st Mar 1938Box 166 \ 9  img160
Invoice from Clear Hooters Ltd. for a pair of electric horns.23th Mar 1938Box 166 \ 9  img161
Requesting a replacement trumpet for a damaged Lucas Windtone WT.13 horn.23th Mar 1938Box 166 \ 9  img162
Despatch instructions for a WT.13 type Windtone Horn Trumpet for a Wraith Experimental model to J. Lucas Ltd.23th Mar 1938Box 166 \ 9  img163
The unsatisfactory test results for a pair of 'clear Hooter' horns, instructing their return to the makers.24th Mar 1938Box 166 \ 9  img164
Horn failure on car 25.G.VI.8th Apr 1938Box 166 \ 9  img165
Requesting the return of experimental WT.13 type horns to the makers for overhaul.5th May 1938Box 166 \ 9  img166
The forwarding of two W.T.13 type Lucas Horns for overhaul and adjustment.6th May 1938Box 166 \ 9  img167
Letter to Lucas Ltd. concerning the failure of WT.13 type horns after a 21,000-mile test run.5th May 1938Box 166 \ 9  img168
Costs of protecting the horn wire in the steering column from petrol and oil.20th May 1938Box 166 \ 9  img170
Horns failing during rain on car 29.G.VI and a request for their replacement.15th Jun 1938Box 166 \ 9  img172
Recommending the sale of obsolete WT.11 type Lucas windscreen horns.22th Jul 1938Box 166 \ 9  img173
Recommending the sale of a pair of used WT.11.X type horns for ten shillings.18th Aug 1938Box 166 \ 9  img174
New noise regulations for vehicle horns and their impact on the Phantom and Bentley chassis.18th Mar 1938Box 166 \ 9  img175
Proposal to introduce Mellotone Horns on Bentley 'M' Series cars.3rd Sep 1938Box 166 \ 9  img176
Change of horns on the Bentley 'M' Series to comply with Ministry regulations on noise levels.3rd Sep 1938Box 166 \ 9  img177
Requesting the replacement of car horns and an indicator bulb.24th Oct 1938Box 166 \ 9  img178
Request to arrange the return of faulty Lucas WT.13 horns from a Bentley car for examination.29th Nov 1938Box 166 \ 9  img179
Letter to Joseph Lucas Ltd. regarding a faulty horn on a Bentley car and requesting an investigation.29th Nov 1938Box 166 \ 9  img180
Letter from Joseph Lucas Ltd regarding the examination of a pair of Windtone Horns after a 15,000-mile trial.12th Dec 1938Box 166 \ 9  img181
Investigation report on the failure of Lucas Wind tone Horns during a 15,000-mile trial.13th Dec 1938Box 166 \ 9  img182
Submission of WT.23 Wind Tone Horns for testing on the Wraith.19th Dec 1938Box 166 \ 9  img183
The road testing and fitting of experimental horns type WT.23 to a Wraith car.18th Jan 1939Box 166 \ 9  img184
Notification about a change in the mounting position of the Horn Relay Unit for the Bentley V model.20th Jan 1939Box 166 \ 9  img185
Letter detailing the temporary failure of WT.13 type horns in cold weather on an Experimental Bentley car.9th Feb 1939Box 166 \ 9  img186
Letter discussing a fault with car horns, suspecting distortion from low temperatures, and proposing sending them for repair.9th Feb 1939Box 166 \ 9  img187
The removal and return of failing Lucas horns from a Bentley car.9th Feb 1939Box 166 \ 9  img188
Instruction to dispatch a pair of WT-13 Wind Tone Horns to J. Lucas Ltd. for examination and report.13th Feb 1939Box 166 \ 9  img189
Letter from Joseph Lucas Ltd. regarding a failure of WT.13 horns on Experimental Bentley No. 7.B.V.13th Feb 1939Box 166 \ 9  img190
Fitting of lamps, horns, and brackets to a Silver Wraith.17th Feb 1939Box 166 \ 9  img191
The testing and development of Lucas Wind Tone Horns, Type WT.23, compared to the standard WT.13.23th Feb 1939Box 166 \ 9  img192
Test report on car horns, detailing electrical measurements and pitch.23th Feb 1939Box 166 \ 9  img193
Letter from Joseph Lucas Ltd regarding W.T.13 Wind-tone Horns removed from an experimental Bentley.14th Mar 1939Box 166 \ 9  img194
Report from Joseph Lucas Ltd. on the examination and failure analysis of a returned pair of defective WT13 horns.10th Mar 1939Box 166 \ 9  img195
The re-conditioning of two horns, noting the performance of sand castings versus die-castings.10th Mar 1939Box 166 \ 9  img196
Letter chasing J.Lucas Ltd. for a report on a pair of failed W.T.13 Wind Tone Horns.10th Mar 1939Box 166 \ 9  img197
The removal and return of faulty Lucas wind horns from a Bentley car for repair.9th Feb 1939Box 166 \ 9  img198
Letter to J. Lucas Ltd. regarding the failure of WT-13 Wind Tone Horns fitted to an experimental car.13th Feb 1939Box 166 \ 9  img199
Request to order Lucas H.F. Horns and associated K parts for chassis 4.B.50 'Cresta'.18th May 1939Box 166 \ 9  img200
Requesting an order for high-frequency horns for testing on cars in France.20th Jun 1939Box 166 \ 9  img201
The trial of experimental Lucas wind tone horns on car 25.G.VI.28th Jun 1939Box 166 \ 9  img202
Internal order for Mellotone horns and fittings for the 'Cresta' chassis.20th Jul 1939Box 166 \ 9  img203
Letter to Joseph Lucas Ltd. concerning a control box and horns.27th Aug 1941Box 166 \ 9  img204
Letter to Joseph Lucas Ltd. requesting an outline drawing of WT.26 horns and information on a device for controlling engine speed for tank work.5th Sep 1941Box 166 \ 9  img205
Letter from Joseph Lucas Ltd. regarding an outline drawing for Model WT28 electric horns.17th Sep 1941Box 166 \ 9  img206
Letter from McNaught Lamps Limited regarding discounts and forwarding a 7' All-Chrome Fog & Spot Lamp.19th Oct 1935Box 167 \ 1  img001
Advertisement leaflet for McNaught Fog and Spot Lamps.5th Feb 1935Box 167 \ 1  img002
Promotional leaflet for McNaught Lamps, featuring unsolicited customer testimonials and pricing for their fog lamps.5th Feb 1935Box 167 \ 1  img003
Request for a fog and spot lamp on approval from Mc.Naught Lamps, Limited.18th Oct 1935Box 167 \ 1  img004
Letter from The Trippe Safety Speed Light Co. Ltd. providing recommendations for fitting their auxiliary fog lamp.2nd Sep 1935Box 167 \ 1  img005
Letter from The Trippe Safety Speed Light Co. Ltd. regarding the supply, features, and trial of their lamps.2nd Sep 1935Box 167 \ 1  img006
Explaining the working principles of the Trippe Lamp, focusing on its parabolic reflector design.2nd Sep 1935Box 167 \ 1  img007
From The Trippe Safety Speed Light Co. Ltd. describing the function and design of anti-dazzle lamp reflectors.2nd Sep 1935Box 167 \ 1  img008
Page 3 of a document from The Trippe Safety Speed Light Co. describing a lamp and its bulb mask.2nd Sep 1935Box 167 \ 1  img009
The design and function of the Trippe Lamp for optimal performance in fog.2nd Sep 1935Box 167 \ 1  img010
From The Trippe Safety Speed Light Co. Ltd. discussing the effectiveness of their fog lamp.12th Nov 1935Box 167 \ 1  img011
The delivery of two non-glaring fog lamps from Notek Electric Company.12th Nov 1935Box 167 \ 1  img012
Letter from Notek Electric Company regarding the testing of their non-glaring fog and traffic lamps.11th Nov 1935Box 167 \ 1  img013
Letter from Notek Electric Company Limited regarding a technical matter.11th Nov 1935Box 167 \ 1  img014
Responding to a telegram request for Bentley lamps, confirming their despatch and advising of a delay with the grids.18th May 1936Box 167 \ 1  img015
Circulating a copy of the Statutory Rules and Orders 1936, No. 392, concerning vehicle lighting and headlamps.19th May 1936Box 167 \ 1  img016
Statutory document outlining the Road Vehicles Lighting Regulations from 1936.30th Apr 1936Box 167 \ 1  img017
Page from a legal document detailing regulations for vehicle lighting, specifically the positioning and character of front lamps.30th Apr 1936Box 167 \ 1  img018
Regulations for vehicle lamps, including beam deflection, anti-dazzle requirements, and bulb markings.30th Apr 1936Box 167 \ 1  img019
Page of regulations concerning vehicle lighting, reflectors, and their usage.30th Apr 1936Box 167 \ 1  img020
Regulations for vehicle reflectors, white surfaces, and the dimensions and lighting of hand-drawn vehicles.30th Apr 1936Box 167 \ 1  img021
Page from a legal instrument detailing regulations for vehicle lighting and parking.30th Apr 1936Box 167 \ 1  img022


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