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ilp archive : journals

public lighting no. 51 vol. 13
July-September 1948


(A copy of The Presidential Address was included with this issue).


Editorial p95
The Conference p95
The 1948 Conference has further proved the growing popularity of the yearly gathering. There were large attendances at each of the sessions.
APLE: Conference


Exhibition p95
There was an extremely comprehensive display of equipment in the same building as the Conference Hall. On the rink adjoining the Conference Hall there were 60 lamp columns which proved of great interest, as did the ladders and tower wagons, also on show. It should be noted that this phase of the Conference is proving itself a great attraction and more and more manufacturers expres their desire to participate in the exhibition.
APLE: Conference


The President p95
It is confidently anticipated that Mr. N. Boydell, M.I.E.E., A.M.I.Mech.E., sub-area manager (East Sussex and South-West Kent), South-Eastern Electricity Board, will live up to the high traditions of the Association during this year of office. Mr. Thos. Wilkie (the Past President) pointed out that Mr. Boydell was taking over the presidency at a time which was different to any other, because many changes had been made, and were impending, but with his wisdom, he should do well.
APLE: Conference


The Past, The Present and the Future p95
This was the theme of the Presidential Address and it is which pride and satisfaction that the APLE can look back over the past 24 years and assess the value of their work, and point to many developments which have taken place throughout the country, credit for which can be claimed by the Association. However, the present and future are very much in the mind of the Association. The Association only recently sent a deputation to the M.O.T. where material facts concerning the question of the 50% cut were discussed by the Ministry and Association's representatives, and this was followed by the Ministry's departmental circular reommending that street lighting be brought up to 75% of the pre-war standard. What were the thoughts of the A.P.L.E. in 1924? Did they forsee such rapid advancements? Obviously, they had in mind the great necessitiy for better street lighting, and must now be feeling that their labours of formulating such an Association were far from being in vain.
APLE: Conference, APLE: History


The Vice President p95
The election of Mr. A. S. Tapsfield as Vice-President has met with the unanimous approvial of the members. He is the lighting engineer of the City of London.
APLE: Conference


Annual Conference Eastbourne p97
Annual General Meeting
President Mr. Thos Wilkie convened the meeting, vote on the telegram to the King, appointment of scrutineers, losses to the Association (Secretary H. O. Davies, Secretary and Secretary/President of the Illuminating Engineering Society J. S. Dow, Founding Member/Ex-President Mr. A. Forbes and Honorary Member Sir Clifford Paterson of the GEC), statement of income and expenditure, election of auditors, Mr. R. Parker, Mr. H. Pryce Jones and Mr. C. C. Smith were elected members of the Council replacing Mr. W. N. C. Clinch and Mr. H. V. Emptage, Mr. Eric Evans was elected the new Secretary and there was a vote of thanks for Mr. Wilkie.

Official Opening of Conference
The Mayor of Eastbourne officially opened the Conference.

Induction of New President
The new President was Mr. N. Boydell, formerly Borough Electrical Engineer of Eastbourne, and now manager, East Susex and South-West Kent, South-Eastern Electricity Board. Mr. N. Boydell then introduced the new Vice-President Mr. A. S. Tapsfield of London. This was followed by the inspection of the indoor and outdoor exhibitions.
APLE: Conference


Unidrectional Lighting of Double-Carriageway and One-Way Roads by J. S. Smyth, B.Sc., A.M.I.E.E. p100
Reproduction of the paper Unidrectional Lighting of Double-Carriageway and One-Way Roads.

Discussion
C.C. Smith (Liverpool): Three points: (1) More attention will be paid to glare in the future, for in obtaining high revealing powwer, this factor was more important than people realised; (2) They had experimented with cut-off lanterns to produce a form of unidirectional lantern and the effect on contrast between object and background brightness was most pronounced; (3) Modern types of roundabout formed a background for approaching traffic and if unidirectional lighting were used with no light directed behind the lantern, the roundabout itself would form a dark background and cause inconvenience to traffic using it. Had consideration been given to temporary modification of unidrectional lighting on dual carriageways when one carriageway is under repair and the other used for traffic in both directions?
Mr. N. Schofield (Huddersfield): Some people complained of glare and this particular system of lighting was blamed for this, but personally he did not think the glare was more than with the ordinary system of lighting. Such glare as was experienced he thought was due to the narrow road and the lack of background. He did not believe it was due to the particular system of lighting. A point which had not been mentioned was the possibility, with traditional lighting, of switching off a certain number of lights at midnight.
Mr F. C. Smith (Gas Light and Coke Co.): He had visited the installation at Portsmouth, to inspect it critically, and to drive along it in order that he might get a first-hand impression from the driver's point of view. He had also inspected other modern installations on dual carriageway roads which operated on entirely different principles from the installation at Portsmouth. The lighting of the Sidcup By-Pass, which was by horizontal mercury lamps in lanterns designed to provide a controlled cut-off, was of special interest - the units were sited on the central verge and the result was very good. It was important that modern methods now on view should be studied and their relative performance compared. With regard to the uni-directional system, this system was worthy of close consideration as it might well be the solution of some of the problems of the lighting of double carriageway roads. It was not equally applicable to all double carriageway roads but if used with discretion, there was a great deal to commend the system.
Mr. C. Harper (Borough Engineer, Barking): The success of this system depended very markedly on defects in the road surface.
Mr. Bradley (Southern Electricity Service, Portsmouth Sub-Area): Tests had shown that, with unidirectional lighting, kerbline definition could be greatly improved and clear outlines obtained. Although revealing power of a high order could be obtained with a very low wattage, glare from sidelights even of vehicles passing on the offside carriageway, could be serious.
Mr. G. Syddall (Middleton): Had adequte consideration been given to road traffic and other signs?
Alderman F. Doggett (Cambridge): Had the unidirection system been used in one-way streets in built up areas? In Cambridge there were a number of narrow streets and it had been necessary to extend the one-way system.
Mr. Smyth: For planning, it was planned very closely on the lines of the normal system, except that it had to be considered in one direction, which made it easier. There was no need for more poles with the unidirectional system as with the normal system. With regard to wattage, it was not desirable to go too low: the 45W SO/H system (at Portsmouth) was purely experiemental and was not recommended for traffic route lighting. It was an experiment to see what could be done with the minimum of power. It was a good idea to try unidirectional lighting in one-way streets by built up areas - however pedestrians might not like it very much. There was no reason why glare from the unidirectional lantern should be more than a normal one. The lighting of traffic and other signs should themselves be illuminated - if the total energy used by the street lighting was halved, it was not a bad bargin to light the signs. Most of the work so far had been exploratory and experimental and there was still much to be investigated, but the unidirectional system did seem to do all that the conventional system did, but with less power consumption and an increased revealing power.
Lighting: Distribution, Lighting: Energy, Lighting: Installations, Lighting: Levels, Lighting: Luminaires, Lighting: Specifications, Lighting: Theory


Scottish Section - Inaugural Meeting p107
It will be held in the Burgh Court Room, City Chambers, Dundee on the 5th November 1948. A programme of papers and events is included.
APLE: Sections


Bound Copies of Eastbourne Conference Papers p107
These are now available.
APLE: Conference


Street Lighting in the Vicinity of Aerodromes by S. English, D.Sc. and J. G. Holmes, A.R.C.S., B.Sc. p108
Reproduction of the paper Street Lighting in the Vicinity of Aerodromes.

Discussion
Mr. J. Allen (REVO Electric Co. Ltd.): He was told a pilot who mistook a road for an aerodrome was no pilot! He was involved in a scheme which was turned down because it was five miles from an airfield - therefore was the word "vicinity" intended to be elastic? The additional cost of complying with the Regulations should be borne by the Ministry.
Mr. C. C. Smith (Liverpool): It would not be any great hardship to street lighting if no lighting were to be emitted above the horizontal in the vicinity of aerodromes. Cut-off lighting was not as expensive as many people thought. In Liverpool it had been found - incidentally the lanterns on the Purley Way were the original Liverpool cut-off type - that if these lanterns were mounted at 25' to 28' at 35 yards spacing, with 140W sodium lamps, a splendid result was obtained. They were centrally mounted, which facilitated the provision of supply, and the revealing power was of a high order. The saving in the cost of electric service as compared with lamps on each side of the road was considerable. The installation along Bath Road was 25' high - in Liverpool, an installation near an airport had to be mounted at 8' high. How was it that columns 25' high had been allowed near an airport?
Councillor H. Gorton (Worsley U.D.C.): His council had been dealing with the Ministry for three years with regard to the lighting of a mile of road before sanction was obtained. During that period, the cost had increased by 1000 pounds, and when complaint was made to the Ministry of Transport they said it was due to negotiations with the Ministry of Civil Aviation. The Council had been informed that no grant would be made to meet this extra cost and he did not think it was fair that there would be such delays and then the additional cost placed upon local ratepayers.
Mr. C. M. Frobisher (Manchester): No mention had been made of radio devices used for assisted lighting. Then there was the question of the colour of street lighting. Could there not be a standard uniform colour for the lighting of roads?
Ministry of Civil Aviation: It is felt that consideration should be given to the problem of screening street lighting with as little additional cost as possible for existing installations and with no additional cost for new installations. Research should be diretd to the possibility of designing a street lighting fitting having both a satisfactory cut-off above the horizontal and giving adequate illumination on the ground, and at the same spacing for non-cut-off type lanterns.
Dr. English (Reply): In foggy weather it might be difficult to differentiate betweeen street lighting and aerodrome lighting. "Vicinity" had quite a wide interpretation in this case. The Ministry of Transport and the Ministry of Civil Aviation and the other authorities concerned would have to come to some arrangement between themselves to meet the additional cost caused by their requirements. Screening was not a great hardship for new installations but those that had been previously planned would involve considerable extra expensive if the illumination of the road was not to be spoiled. The Bath Road installation was there before the aerodrome and was protected by trees and buildings along the sides of the road.
Lighting: Colour, Lighting: Distribution, Lighting: Installations, Lighting: Luminaires


The Illiminating Engineering Society p117
I.E.S syllabus for the Manchester Centre, North-Western Area have been issued for 1948-49. This includes a joint meeting with the A.P.L.E. with "Fluorescent Street Lighting" by W. D. Sinclair, A.M.I.E.E.
Lighting: Education


Public Lighting p117
It is hoped to publish a Special Conference issue in November and a normal issue of Public Lighting in December. These will contain the remaining papers from Eastbourne. The Special Conference Issue will also contain particulars and illustrations relating to the exhibition of Street Lighting.
APLE: Conference, APLE: Journal


Adverts: The General Electric Co., Ltd, Gowshall Ltd., Stanton Ironworks Co., Ltd, Siemens Electric Lamps And Supplies Ltd., British Gas Council, Broads Manufacturing Co. Ltd., Automatic Telephone And Electrical Co., Ltd., Holophane Ltd., Stewarts And Lloyds Co., Ltd., REVO Electric Co., Ltd., British Electrical Development Association, Inc, The British Thomson-Houston Co. Ltd., Concrete Utilities Co., Ltd., Metropolitan Gas Meters Ltd., Parkinson & Cowan (Gas Meters) Ltd., Engineering And Lighting Equipment Co. Ltd., Gravity Ladders Ltd., The Horstmann Gear Co., Ltd., Walter Slingsby and Co., Ltd., British, Foreign And Colonial Automatic Light Controlling Co., Ltd., Falk, Stadelmann Co., Ltd., William Sugg And Co., Ltd., Metropolitan Vickers Electrical Co. Ltd, Sangamo Weston Ltd. and Poles Ltd.