The Optical Magic Lantern Journal (November 1896)

The Optical Magic Lantern Journal and Photographic Enlarger. 193 @ oS A NEW APPA GWYER’S8 PATENT JET. Messrs. Willway, of Bristol, are having a large demand for Gwyer’s jet. This jet is different fs 3 . = : ° ° in general design from jets hitherto in use, the | mixing chamber, which is a large one, is situated @ little behind the lime, and lies in a horizontal position, and is packed after the style found most suitable by Mr. Gwyer. lime to and from the nipple, and the rotating of the lime are controlled by two milled heads fixed on the same shafting. The smaller milled head imparts a slow movement to the lime as the end of the shafting terminates in a worm which gears with a wheel below the lime. The larger milled head controls a coarse screw, which causes the lime carrier to slide in a dovetail guide. ways according to desire, viz., screw-down T, and lever taps. great pressure of gas without perceivable noise, and it can also be worked at a very low pressure without the slightest chance of snapping. The light whichcan be obtained with this jet is enormous. It works equally well, either with two cylinders of gas, or with oxygen and Gwyer’s ether saturator, and the brilliancy of the light under these two systems is practically equal. The jet is well made, strong, and adds a new power to the lanternist or stave operator. ACME PRINT TRIMMER. A very convenient print, lantern slide mask, or cloth cutter has been introduced by Mr. J asper Redfern, 55, Surrey Street, Sheffield, As will be seen in the illustration, the wheel cutter is made in a hollow; this enables it to be quickly sharpened, when necessary, by a few rubs on a stone, the instrument being held so that the The movements of the | The taps are made in three | The jet will stand a very | ' 1 wheel lies flat on the stone, thus the whole of the cutting edge is ground’at the same time, and consequently there is no chance of putting | the wheel out of true by unequal grinding. | The whole thing is strong and will last a life| time, and should a new wheel or screw become necessary, they can be obtained as they are made interchangeable. INCANTO ACETYLENE GAS GENERATOR.—-PATTERN B Messrs. Thorn & Hoddle have brought out a generator for general lighting purposes and for installations on a large scale. One of its great advantages is that it can be recharged without in the slightest interfering with the lighting. This apparatus can be placed in any cupboard or out of the way place, and connections made with the ordinary piping laid throughout a house, as it works automatically. It is made in three sizes, the smallest being provided with only one container, whilst the others are made with two, as shown in the illustration. The largest size, which measures 26 by 36 inches, will generate sufficient gas to last 120 hours with one burner. A supply of calcium carbide is placed in each division of the two containers which are similar to drawers, and the contents of each division are acted upon by water in turn as soon as the previous one has become exhausted. This is effected by means of a small ball-cock inside of the gasometer, which allows alittle water to reach the containers each time the bell of the gasometer has fallen a certain distance. On the top of the bell two lines are marked (a) and (B). When in descending the line (a) disappears, it indicates that the generator marked (B) has come into use, and that the other marked (A) is exhausted, when the tap at the (4) container can be closed, and the container