We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
The Optical Magic Lantern Journal and Photographic Enlarger.
161
taps can, however, be operated independently by merely lifting a bar which serves to connect
both jets “on” at the same time.
THE MATTHEWS’ PORTABLE LANTERN.
THE Matthews’ Portable Lantern (35, Danbury Street, Islington, N.) has for its base two tubes, to which is secured the front of the instrument, and upon which run blocks which carry the remaining portions, viz.:—the carrier stage, condenéger, jet, and cover or body; so that the various adjustments are made with quickness and certainty. The condenser is seated upon its block and clamped by a band and screw.
A rising platform is attached to the carrier stage, so that it is a simple matter to bring a slide up to the required height. With regard to the body, this is merely a Russian iron cover to keep the light from escaping.
This lantern is packed in a box measuring 134 x 6 x din., which has a rising lid, and which thus forms a convenient stand upon which::to operate the lantern. Wheu packed, the lens is screwed in thé plate the other way about to that shown in the cut.
Owing to the peculiar mode of fastening the jet upon the saddle for adjustment, a special jet has been devised to go with this lantern, it forming part of the outfit.
ANTI-GLARE JET. Unpur the heading of ‘‘ Notes” in our July journal, we stated that Mr. Barton, of Manchester, bad invented a new jet attachment which would shortly be introduced by Mr. J. H. Steward, of Strand, W.C. This jet being now on the market, we will, with the assistance of the annexed cut, give our readers an idea of what part it plays iu lantern matters. It prevents stray light from escaping at the back of the lantern, whilst at the same time all the necessary adjustments of the jet are controlled from behind. On reference to the drawing it will be-seen that the supply tubes, which carry the adjustment
i for gas and lime, pass through a tube (not unlike
a lens tube) actuated by a rack and pinion J, which controls the movement of the light to or from the condenser. The light is raised or lowered by adjusting the screw B, which works against the stop A, while the side adjustinent is controlled by the slotted plate and pin attached to C, and clamped in position by D, the pivot being at N. The gas taps are fitted with screwdown taps HH, which permits of an exceedingly fine adjustment of gases. If it is desired to shut the gas off completely the lever I does this. The supply pipes are shown at K and L, the lever M being a ‘ cut-off” to turn the gas down to a mere speck—say during an interval—without interfering with the adjustment of gas
previously made, so that when the lever M is again turned on the gas adjustments will be precisely the same as before turning them down. The lime is turned by the rod F, which works through the tube G; this also moves the lime to or from the nipple of jet.