3. This Order may be cited as "The Safety Lamps Order of the 13th December, 1919." Whitehall, 13th December, 1919. E. Shortt, One of His Majesty's Principal SCHEDULE. Part I.—Flame Safety Lamps approved for General Use. 1. MESSRS. ACKROYD AND BEST, LTD., MORLEY, NEAR LEEDS. Hailwood Lamp, Type 01 B. This lamp is a modification of the Hailwood Type 01 lamp.(a) It differs therefrom mainly in being designed to take a glass 63 mm. in length. Slight alterations in details of construction which do not affect the safety of the lamp, have also been introduced. Approval is subject to the conditions: (i) That the strength of material and attachments throughout the lamp (ii) That the lamp shall be capable of maintaining a light of candle-power (iv) That the lamp shall have marked upon it its name and the name of 2. COMMERCIAL ENGINEERING COMPANY, 11, COMMERCIAL STREET, BIRMINGHAM. J.C.B. Lamps, Nos. 19 and 19F. These are precisely the same types of lamp as the approved J.C.B. lamps, Nos. 19 and 19F, formerly manufactured by Messrs. Joseph Cooke & Son, 203, Lawley Street, Birmingham, and the same specifications (b) apply except that the lamps are now to be made at the works at Commercial Street, Birmingham. 3. MESSRS. M. LOWRANCE & Son, Peel SqUARE AND MARKET STREET BARNSLEY. The M. L. and S. Lamp. This lamp is of the Marsaut type, with air-feed through the middle ring. A number of examples (made by different manufacturers) formerly in use by the Brodsworth Main Colliery Company, Limited, have been altered to comply with the requirements of the Home Office, by Messrs. M. Lowrance and Son. The lamp, the general design of which is shown in Plate 1, consists of the following essential parts: (1.) Bonnet or Shield of rivetted steel, with a separate securely fastened crown, furnished with outlet holes immediately below the crown, provided that the lower edges of the holes are not less than inch above the top of the outer gauze. (2.) Middle or Bonnet Ring of brass, rivetted to the bonnet, furnished with vertical air-inlet holes and horizontal slots of total area not exceeding 2 square inches. See page 4 and plate 1 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913, No. 886, or p. 580 of Vol. of S.R. & O., 1913). (b) J.C.B. No. 19, see page 7 and Plate 4 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913, No. 886 or p. 583 of Vol. of S.R. & O., 1913). J.C.B. No. 19F, see page 8 and Plate 4 of the Safety Lamps Order of the 16th March, 1914 (S.R. & O., 1914, No. 345 or p. 826 of Vol. 1 of S.R. & O., 1914). Pillars of brass, steel or iron, 5 so arranged that a straight line touching the exterior parts of consecutive pillars does not touch the glass. Bottom or Lock Ring, of brass. (3.) Gauzes of not less than 28 S.W.G. steel wire, 784 meshes to the square inch, with double folded lap seams, strengthened by a steel liner, formed to fit flanges of the inner and outer base rings, and so secured to the same by punch indentations as to make strong and flame-tight joints. The arrangement of the gauzes is shown in Plate 1, and is such that the gauze rings form the seating necessary to hold the glass firmly in position when the retaining ring is screwed home, thus preventing the possibility of the lamp being put together without the gauzes. (4.) Glass of an approved type, cylindrical in form, and within the dimension limits and bearing the size-mark specified below: furnished with top and bottom asbestos washers to ensure flame-tight joints with the gauzes and retaining ring. (5.) Glass retaining-ring of brass, screw-threaded to fit the bottom ring, provided that the clearance between the bottom of the glass-retaining ring and the top of the oil-vessel shall not be so great as to make it possible, under reasonable working conditions, to loosen the glass by forcing it round in its seating to such an extent as to impair the safety of the lamp. (6.) Oil-Vessel of brass, fitted with a flat -inch burner of capacity sufficient to provide the required light for the required time as specified below. (7.) Locking Device.-A lead-rivet lock with a hasp or lug securely fastened to a pillar and a staple or lug securely soldered to the oil-vessel. Approval is subject to the further conditions : (i) That the strength of material and attachments throughout the lamp (ii) That the lamp shall be capable of maintaining a light of candle power (iv) That the lamp shall have marked upon it its name and the name of 4. THE PREMIER LAMP AND ENGINEERING Co., LTD., MOORfield Premier Lamp, No. 11. Premier Marsaut Lamp, No. 12. These are precisely the same types of lamp as the approved Cremer lamp, Nos. 11 and approved Cremer Marsaut lamp No. 12, formerly manufactured by the Cremer Lamp and Engineering Co., Ltd., and the same specifications(a) apply except for the above change of name. (a) Cremer No. 11, see page 9 and Plate 5 of the Safety Lamps Order of the 26th August 1913 (S.R. & O., 1913, No. 886 or p. 585 of Vol. of S.R. & O., 1913). Cremer Marsaut, No. 12 (formerly No. 15), see page 8 and Plate 5 of the Safety Lamps Order of the 16th March, 1914 (S.R. & O., 1914, No. 345 or p. 826 of Vol. I. of S.R. & O., 1914). 5. MESSRS. E. THOMAS AND WILLIAMS, LIMITED, ABERDARE. The Cambrian Lamp, No. 5. This lamp is a modification of the Cambrian Lamp No. 1, (a) from which it differs in the following respects :— (1.) Vertical air-inlet holes only, 10 in number, of a total area not exceeding 1.5 square inches, are provided in the middle ring. (2.) The internal dimensions of the gauzes in inches are as follows: (i) That the strength of material and attachments throughout the lamp (ii) That the lamp shall be capable of maintaining a light of candle-power (iv) That the lamp shall have marked upon it its name and the name of Part II.-Flame Safety Lamps approved for Special Purposes. (a) For Use by Officials only. MESSRS. ACKROYD AND BEST, LTD., MORLEY, NEAR LEEDS. Hailwood Lamp, No. 01 B.A. The same type of lamp as Hailwood lamp No. 01 B (see page ), but made of aluminium. THE PREMIER LAMP AND ENGINEERING CO., LTD., MOORFIELD Premier Lamp, No. 11a. This is precisely the same type of Lamp as the approved Cremer lamp No. ila, formerly manufactured by the Cremer Lamp and Engineering Co., Ltd., and the same specification(b) applies except for the above change of name. MESSRS. E. THOMAS AND WILLIAMS, LTD., Aberdare. The Cambrian Lamp, No. 29. This lamp can be regarded as a modification of either the Cambrian Lamp No. 21(c) or the Cambrian Lamp No. 9, (d) which is itself a modification of the Cambrian Lamp No. 3.(e) (a) See page 35 and plate 27 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913, No. 886 or p. 611 of Vol. of S.R. & O., 1913). (b) See page 38 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913, No. 886, or p. 614 of Vol. of S.R. & O., 1913). (c) See page 46 and Plate 36 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913, No. 886 or p. 622 of Vol. of S.R. & O., 1913). (d) See page 3 and Plate 2 of the Safety Lamps Order of the 1st July, 1914 (S.R. & O., 1914, No. 1002 or p. 856 of Vol. I. of S.R. & O., 1914). (e) See page 35 and Plate 28 of the Safety Lamps Order of the 26th August, 1913 (S.R. & O., 1913. No. 886 or p. 611 of Vol. of S.R. & O., 1913). The bottom part of the lamp is identical with that of the No. 21 lamp; the top part is similar to that of the No. 9 lamp but is furnished with vertical air-inlet holes only, 5 in number, of a total area not exceeding 1.5 square inches in the middle ring. The approval is subject to the further conditions : · (i) That the strength of material and attachments throughout the lamp (iii) That the lamp has been made at the works of Messrs. E. Thomas and (iv) That the lamp shall have marked upon it its name and the name of the maker. (v) That the lamp shall be used by officials only. The Cambrian Fireman's Lamp, No. 25. The Cambrian Fireman's Lamp No. 25, the general design of which is shown in Plate 2, is a double gauze oil lamp with air-feed through vertical holes in the middle ring. It consists of the following essential parts :— (1.) Bonnet of brass (or aluminium) with separate rivetted crown provided with outlet holes round the top so arranged that their lower edges are not less than -inch above the top of the outer gauze. (2.) Middle Ring of brass (or aluminium) rivetted to the bonnet, provided with 8 vertical air-inlet slots of total area 1.375 square inches. Pillars of brass (steel or iron), four in number, so arranged that a straight line touching the exterior parts of consecutive pillars does not touch the glass. Bottom Ring of brass (or aluminium). (3.) Gauzes of not less than 28 S.W.G. best charcoal annealed iron wire, 784 meshes to the square inch, with secure and flame-tight double bend seams stiffened with a steel liner, so rivetted to brass or copper rings with additional inner flanges as to make secure and flame-tight joints. The inner gauze has a closely fitting liner of tin, 1 inches high, which acts as a deflector. The arrangement of the gauzes is such that the lamp cannot be assembled without them. (4.) Glass of an approved type, cylindrical in form, within the dimension limits and bearing the size mark specified below, and furnished with top and bottom asbestos washers to ensure flame-tight joints with the gauzes and retaining rings. Dimensions, in millimetres :— External diameter (5.) Glass Retaining Ring of brass (or aluminium) screw-threaded to fit the bottom ring. (6.) Oil Vessel of brass or stamped steel, of capacity sufficient to provide the required light for the required time. Fitted with a inch flat wick. Provided or not with a pin or screw wick-adjuster and with or without an electric igniter; both so fitted as not to cause the lamp to be dangerous in an explosive atmosphere. |