| Description | Date | Identifier | |
| Acknowledgment of order for master battery switch samples for approval from Rotax Limited. | 18th Nov 1935 | Box 168a \ 2 img193 | |
| The Conditions of Sale for goods. | 10th May 1934 | Box 168a \ 2 img194 | |
| Letter from Imperial Airways advising that they do not use a battery master switch on their aircraft. | 18th Nov 1935 | Box 168a \ 2 img195 | |
| Request to order two N5DH battery master switches for aircraft from Messrs. Rotax, Ltd. | 19th Nov 1935 | Box 168a \ 2 img196 | |
| Internal order for a 24-volt B.T.H. Solenoid starter switch for Merlin installation test purposes. | 20th Nov 1935 | Box 168a \ 2 img197 | |
| Description of the operation of a push-button combination switch for controlling two circuits, used for aircraft engine starting. | 4th Dec 1935 | Box 168a \ 2 img198 | |
| The modification of Lucas W.T. horn relay switch units for loud operation. | 4th Dec 1935 | Box 168a \ 2 img199 | |
| Internal request to order two magneto earthing switches from Messrs. Bonnella for the Merlin Horsley at Hucknall. | 24th Dec 1935 | Box 168a \ 2 img200 | |
| Order for a D.P. magneto switch, A.M. type Ec/548, for use on J6811 to replace an existing switch. | 30th Dec 1935 | Box 168a \ 2 img201 | |
| Internal order request for solenoid and push button switches for Merlin E engines. | 10th Jan 1936 | Box 168a \ 2 img202 | |
| Request to order two No.54105 two-way headlamp switches from Lucas Ltd, to be engraved 'Town and Country' for use with wind tone horns. | 21th Jan 1936 | Box 168a \ 2 img203 | |
| Request for two headlamp changeover switches with engraved instructions for cars in the Experimental Department. | 24th Jan 1930 | Box 168a \ 2 img204 | |
| Standardisation of a headlamp dipper foot switch. | 24th Sep 1935 | Box 168a \ 2 img205 | |
| Cost estimation for extra jigs, tools, and equipment, with a cost comparison between an old and new part. | 19th Nov 1935 | Box 168a \ 2 img206 | |
| Unreadable, dark document with two punch holes on the right. | 7th Feb 1936 | Box 168a \ 2 img208 | |
| Quotation from Rotax Limited for a sample N.S.F.Q. Push Switch. | 7th Feb 1936 | Box 168a \ 2 img209 | |
| Letter from Rotax Limited detailing the delivery status for Switches, Carbon Brushes, Springs, Spanners, Magnetos, and Motors. | 8th Feb 1936 | Box 168a \ 2 img210 | |
| Request to rewind the shunt coil on an Aero-Battery ignition changeover switch with a larger gauge wire. | 16th Mar 1936 | Box 168a \ 2 img211 | |
| Requesting an order for Lucas wind-horn changeover switches for a Bentley car. | 25th Mar 1936 | Box 168a \ 2 img212 | |
| Arranging the dispatch of an experimental ignition relay switch for testing at R.A.E. South Farnborough. | 28th Mar 1936 | Box 168a \ 2 img213 | |
| Letter confirming the dispatch of a redesigned ignition changeover switch for R.T. interference testing. | 26th Mar 1936 | Box 168a \ 2 img214 | |
| Internal request to order one BTH solenoid aero starter motor switch for 12-volt operation. | 1st Apr 1936 | Box 168a \ 2 img215 | |
| Specifying the wire to be used for windings on two remaining battery ignition changeover switches. | 1st Apr 1936 | Box 168a \ 2 img216 | |
| Request to build a test Foot Switch with a stronger spring and new toggle arm to achieve a better snap action. | 8th Apr 1936 | Box 168a \ 2 img217 | |
| Letter to the Royal Aircraft Establishment requesting news on the results of their tests. | 15th Apr 1936 | Box 168a \ 2 img218 | |
| Letter from the Royal Aircraft Establishment regarding tests on a switch. | 20th Apr 1936 | Box 168a \ 2 img219 | |
| Letter arranging the supply of six push and pull switches without engraving from the Motor Roof Lamp Co. | 15th May 1936 | Box 168a \ 2 img220 | |
| Order for 6 plain RR pull and push switches to be sent to Lillie Hall. | 16th May 1936 | Box 168a \ 2 img221 | |
| Request for the return of a sample change-over relay switch being tested for radio interference. | 23th May 1936 | Box 168a \ 2 img222 | |
| Letter from the Royal Aircraft Establishment regarding radio interference tests on coil ignition relay switches. | 5th Jun 1936 | Box 168a \ 2 img223 | |
| List of parts required to complete changeover switches for aero battery ignition. | 5th Jun 1936 | Box 168a \ 2 img224 | |
| Letter to the Royal Aircraft Establishment requesting a sketch of a proposed modification to an ignition changeover relay switch. | 13th Jun 1936 | Box 168a \ 2 img225 | |
| Internal order request for B.T.H. solenoid relay switches for Merlin F engines, which was later cancelled. | 13th Jun 1936 | Box 168a \ 2 img226 | |
| Ordering 20 Rotax push button switches for Merlin F engines. | 13th Jun 1936 | Box 168a \ 2 img227 | |
| The return of four 24 Volt Rotax solenoid relay switches for conversion to 12 Volt. | 13th Jun 1936 | Box 168a \ 2 img228 | |
| Letter to British Thomson Houston Co. Ltd. requesting production of a type Phantom I starter switch for examination and testing. | 13th Jun 1936 | Box 168a \ 2 img229 | |
| Rejecting the proposal to change the Phantom III Horn Push Button Switch from a chromium finish to black bakelite. | 10th Jul 1936 | Box 168a \ 2 img230 | |
| Internal request to obtain a Buick accelerator switch and Delco Remy Electric parts. | 29th Jul 1936 | Box 168a \ 2 img231 | |
| Despatch of a starter relay switch for the Hawker P.4/34 aircraft. | 29th Aug 1936 | Box 168a \ 2 img232 | |
| Adoption of a new push and pull switch for the starter motor and booster coil, replacing an unsatisfactory tumbler switch. | 12th Sep 1936 | Box 168a \ 2 img233 | |
| Confirming the cancellation of starter relay switches for Merlin engined aircraft. | 14th Sep 1936 | Box 168a \ 2 img234 | |
| Cancellation of an order for starter relay switches for Merlin engined aircraft. | 14th Sep 1936 | Box 168a \ 2 img235 | |
| Return of 20 Rotax push-button switches for the first Merlin engines. | 19th Sep 1936 | Box 168a \ 2 img236 | |
| Instruction to return 20 N.S.C.D. switches to Messrs Rotax Ltd for credit. | 29th Sep 1936 | Box 168a \ 2 img237 | |
| New parts required for the Phantom III Type Switchbox on the 25/30 HP Chassis. | 10th Jun 1936 | Box 168a \ 2 img238 | |
| To Roy requesting an order for two B.T.H. combined aero booster coils and starter motor switches. | 4th Sep 1936 | Box 168a \ 2 img239 | |
| Letter from the Air Ministry discussing the safety and necessity of a master switch for forced landing relay circuits. | 1st Oct 1936 | Box 168a \ 2 img240 | |
| Responding to a suggestion about fitting switches to aeroplane electrical systems to prevent accidental starts. | 8th Oct 1936 | Box 168a \ 2 img241 | |
| Sales letter from Burgess Products Company Ltd regarding a switch operated by .001 inch movement. | 8th Oct 1936 | Box 168a \ 2 img242 | |
| Advertisement for the Burgess Micro Switch, detailing its features and specifications. | 1st Jan 1936 | Box 168a \ 2 img243 | |
| Datasheet describing the mechanical features of the Burgess Micro Switch. | 1st Jan 1936 | Box 168a \ 2 img244 | |
| The electrical characteristics of the Burgess Micro Switch. | 1st Jul 1936 | Box 168a \ 2 img245 | |
| Product data sheet for the Burgess Micro Switch, detailing its applications, operation, and specifications. | 1st Jul 1936 | Box 168a \ 2 img246 | |
| Notification about the blueprint for a footswitch used with Marchal Headlamps. | 21th Oct 1936 | Box 168a \ 2 img247 | |
| Fatigue failure of a foot switch return spring and recommending a replacement. | 28th Oct 1936 | Box 168a \ 2 img248 | |
| More economical modified design for the instrument board light dimmer switch resistance unit. | 2nd Nov 1936 | Box 168a \ 2 img249 | |
| Instruction request for modifications to the assembly of a foot switch. | 3rd Nov 1936 | Box 168a \ 2 img250 | |
| Parts list for a new petrol pump switch to be fitted on the instrument board for all chassis. | 7th Nov 1936 | Box 168a \ 2 img251 | |
| Request to fit instrument board dimmer switches to chassis 35EX and 37EX. | 12th Nov 1936 | Box 168a \ 2 img252 | |
| Letter from Joseph Lucas Limited concerning a sample 2-Way Push type switch. | 19th Nov 1936 | Box 168a \ 2 img253 | |
| Parts list for a foot switch applicable to all chassis. | 3rd Nov 1935 | Box 168a \ 2 img254 | |
| The urgent fitting of new parts to all cars currently in production. | 7th Nov 1936 | Box 168a \ 2 img255 | |
| Listing sub-assemblies and requesting an experimental trial for a switch. | 3rd Nov 1936 | Box 168a \ 2 img256 | |
| Instruction to fit stiffener plates to the starter main switches on all Experimental cars as they come into the shop. | 30th Nov 1936 | Box 168a \ 2 img257 | |
| Tooling, cost reduction, and design of a petrol pump switch following a meeting with Messrs. Lucas. | 4th Dec 1936 | Box 168a \ 2 img258 | |
| Request to allocate 20 petrol pump switches from a larger order for use on experimental cars. | 9th Dec 1936 | Box 168a \ 2 img259 | |
| Request to fit an instrument dimmer switch to Sg's car while it is in the shop. | 10th Dec 1936 | Box 168a \ 2 img260 | |
| Delaying the fitment of an unsatisfactory foot switch for Chassis 6.B.IV and 35-EX. | 17th Dec 1936 | Box 168a \ 2 img261 | |
| Production specification for the inspection and testing of a starter main switch. | 30th Nov 1936 | Box 168a \ 2 img262 | |
| Production inspection and test specification for a starter main switch unit. | 30th Nov 1936 | Box 168a \ 2 img263 | |
| Procedure for checking various gaps and conducting electrical tests on a switch unit. | 30th Nov 1936 | Box 168a \ 2 img264 | |
| Testing procedures for a switch, specifying contact pressure and voltage tolerance tests. | 30th Nov 1936 | Box 168a \ 2 img265 | |
| Table of gap measurements for a main switch unit in various positions. | 24th Dec 1936 | Box 168a \ 2 img266 | |
| Inspection and testing report on a new footswitch, detailing required modifications. | 24th Dec 1936 | Box 168a \ 2 img267 | |
| The despatch of an Ignition Change over Switch for testing purposes. | 29th Dec 1936 | Box 168a \ 2 img268 | |
| Request to fit an instrument dimmer switch, a fog lamp, and a petrol pump switch to chassis 39-EX. | 1st Jan 1937 | Box 168a \ 2 img269 | |
| Instructions for fitting a new type of foot switch to the Wraith II chassis. | 22th Jan 1937 | Box 168a \ 2 img270 | |
| Requesting the modification and refitting of three dimmer switches on cars 35 Ex and 39 Ex. | 15th Feb 1937 | Box 168a \ 2 img271 | |
| Complaint about a serious failure of the foot switch on chassis 36-EX, requesting its removal for examination. | 22th Feb 1937 | Box 168a \ 2 img272 | |
| The development and standardization of a new chassis foot switch for international regulations. | 3rd Mar 1937 | Box 168a \ 2 img273 | |
| Testing, sourcing, and design issues of a chassis foot switch. | 4th Mar 1937 | Box 168a \ 2 img274 | |
| Refuting claims that a chassis foot switch failed due to a lack of lubrication. | 6th Mar 1937 | Box 168a \ 2 img275 | |
| Factory costs for a footswitch and a petrol pump switch. | 9th Mar 1937 | Box 168a \ 2 img276 | |
| Request for a set of parts for the Foot Switch on a 'Phantom III' Chassis. | 9th Mar 1937 | Box 168a \ 2 img277 | |
| Comparative costs of petrol pump switches and foot switches from an external supplier versus in-house designs. | 9th Mar 1937 | Box 168a \ 2 img278 | |
| Letter to J. Lucas Ltd. requesting up-to-date footswitches and outline drawings. | 8th Apr 1937 | Box 168a \ 2 img279 | |
| Testing and standardizing a new Lucas headlamp foot switch for all chassis. | 8th Apr 1937 | Box 168a \ 2 img280 | |
| Internal request for the address of the supplier of small instrument board switches. | 9th Apr 1937 | Box 168a \ 2 img281 | |
| Phantom III lighting, specifically requesting a copy of instructions for coachbuilders and a look at a proposed switch. | 9th Apr 1937 | Box 168a \ 2 img282 | |
| Identifying the supplier of push-pull instrument board switches. | 10th Apr 1937 | Box 168a \ 2 img283 | |
| Footswitches, attaching a drawing and sample, and discussing a protective rubber sleeve. | 12th Apr 1937 | Box 168a \ 2 img284 | |
| Cost-saving modifications to the Phantom III main starter switch. | 15th Apr 1937 | Box 168a \ 2 img285 | |
| Technical note on a simplified design for a switch with solid copper contacts for aircraft use. | 15th Apr 1937 | Box 168a \ 2 img286 | |
| Requesting an opportunity to inspect and test a starter motor main relay switch. | 16th Apr 1937 | Box 168a \ 2 img287 | |
| Faulty Lucas petrol pump switches and proposed modifications. | 10th Apr 1937 | Box 168a \ 2 img288 | |
| The modification and testing of a Lucas dual fuel pump switch to improve reliability and prevent electrical tracking. | 19th Apr 1937 | Box 168a \ 2 img289 | |
| Standardisation of a stiffener plate for starter switch copper contacts to improve pressure and prevent failure. | 24th Mar 1937 | Box 168a \ 2 img290 | |
| Standardisation of a stiffener plate for the starter switch on the Phantom III to prevent failure. | 12th Apr 1937 | Box 168a \ 2 img291 | |
| Nil extra tool cost for production changes to the 'E' Series chassis. | 12th Apr 1937 | Box 168a \ 2 img292 | |
| This document is unreadable due to the quality of the scan. | 20th Apr 1937 | Box 168a \ 2 img294 | |
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