The Optical Magic Lantern Journal (September 1900)

The Optical Magic Lantern Journal and Photographic Enlarger. FOR HAND CAMERAS Give fine definition to the corners of their plates, and full exposures in dull lights. Are more compact and weigh less than other anastigmats, and cost less. Goxe Jens Ask for the Cooke Booklet. Series Ve Series III. f/6.5 f/8 STOUGHTON STREET Works. LEICESTER. TAYLOR, TAYLOR: Hopson. And 18 Berners Street, LONDON, W. Cc. W. LOCKE, | MAKER OF HIGH-CLASS LANTERN APPARATUS =. Bercy rrpenirngt . On OME ASD ABRORDS perfect Regulators for producing the Everything connected with High-class Projection Work. Best Light with Compressed Gas.— Price 3O8. 5 Pp Guaranteed the Best . LOCKE s S ECIAL LIMES, i ee in the Market. One Trial will Abundantly Prove. LOCKE’S PATENT HIGH-POWER JETS with Fine Adjustment and Screw Valves. APPARATUS and SKILLED OPERATORS for LECTURERS. Hl : BEARD’S PRESSURE GAUGE, fitted with Schaffer’s & Budenberg's Patent Spring Back and Steel Tube, 3Os. > Slides Made and Coloured; Best Work only. Everything BEARD’S NEW JET. Tested Personally before Dispatch and nothing haphazard. ; ; : = Side Maker of the Perfect Cinematograph. Fitted to any Lantern. Gratuitous Advice in all Lantern Matters. Cag be ceen wonkine. Filia ec oplied: Works : 244, Tottenham=Court Road, London, W. | 10; TRAFALGAR ROAD, OLD KENT ROAD, S.E. _ Motto: “ High Efficiency and No Misrepresentation.” (Five Doors South of ‘‘ Lord Nelson.”) THE “INJECTOR” MIXED JET. (JACKSON'S PATENT.) oN PRICH SOs. Ko This is the only Mixed Gas Jet which will work at full power with coal gas taken direct from the town supply, and oxygen from a cylinder. In order to effect this the oxygen, On its way to the mixing chamber, is made to pass through the small Injector | in the sketch at a pressure of about 12 lbs. per square inch. In passing through the Injector it sucks a supply of coal gas from the pipe H, which is connected with the house pipe, and forces it forward through the short pipe T into the mixing chamber M. Here the mixed gases meet the baffle plate B, which has the two-fold effect of silencing the passage of the gases, and ensuring their complete admixture. The mixed gases then pass through holes in the edge of the plate, and so to the burner. The requisite pressure of oxygen is obtained in the ordinary way by a fine tap on the cylinder, or an automatic regulator fitted with a high-pressure spring to deliver at about 15 lbs. pressure. Five seasons’ experience has fully established the superiority of this Jet over all others. It will yield ‘| THE FULL 1,800 TO 2,000 CANDLE-POWER (so-called) of the ordinary mixed jet when taking its supply J of coal gas direct from the town’s pipe, or even froma bag without any pressuveatall. If atown's supply isnot available, it will work just as well with coal gas from a cylinder. We cannot see why ordinary mixed jets should be purchased which cannot offer these alternatives, As for blow-through jets, ejector or otherwise, we do not know why they should be used at all, when with the same economy and convenience of working, the Injector Jet will give two or three times the light. By removing the Injector nipple the jet becomes an ordinary mixed jet. This can be done whenever it is desired to work with oxygen at low pressure, and coal gas from a cylinder. The working of the Jet is simpler than that ofan ordinary jet. When the H tap is once adjusted, it does not need to be touched again when using town’s gas. The turning off or on of the oxygen supply regulates automatically the supply of coal gas. This is a great convenience in actual use. Most existing jets can be fitted with an Injector to enable them to take their coal gas supply from the house pipe. The Jet willin certain cases be sent on approval on deposit of purchase price. Further particulars free on application te MANCHESTER OXYGEN (Brin’s Patent) CO. LTD., Great Marlborough Street, Manchester. — ————~w Please mention this Journal when corresponding with Advertisers.