The Optical Magic Lantern Journal (July 1891)

126 The Optical Magic Lantern J ournal and Piotographic Enlarger. after 65 yards of travel at the other appeared ! simultaneous, though the professor said the chronograph could detect the difference. s 7 * Some time ago, we stated that Mr. Stocks, of Rye, was introducing a.new oil lamp for optical lanterns. We have had an opportunity of trying this lamp, and find that it gives a strong white | light. It is nearly ready to be put upon the market. Mr. R. R. Bean, who until recently has been connected with the firm of W. Oakley and Co., of Bermondsey, has commenced the manufacture of Beard’s Regulators on his own account , but, as his accommodation at present is not equal to the demand, he is arranging for larger manufacturing premises, due announcement of which will appear in our advertising columns. » * * Messrs. Newron ann Co., Fleet Street, F.C., have received from Sir Frederick Bramwell, F.R.S., an appointment as Philosophical Instrument Makers to the Royal Institution, a position which has not been held by any firm for some years past. . * * Tue inventor of ‘Nameit'’ has just made some great improvements in this apparatus for naming photographic prints. The type is now made the reverse way, so that all that is mow necessary is to “set up’? the name, stamp it on negative, dust with powdered charcoal to increase the opacity, and varnish. The name will thus appear in neat white letters upon each print taken from the negative. 10: Inside a Regulator. No. 2. Beaxn's REGULATOR.—The regulator known as Beard’s—after the name of the inventor, Mr. R. R. Beard—is perhaps one of the best-known regulators in use in this country. "lhe external appearance gives no idea whatever of the delicate internal mechanism by which the supply of compressed gas is governed, and as it is hardly likely that one would care to take the instrument to pieces in order to ascertain its mode of working, we have prepared the following sectional drawing, which, with the aid of the description, will enable our readers to readily understand its mode of operating. It may be added that the regulator of which we are now speaking is Mr. Beard’s latest improved pattern, that which he formerly introduced being larger, more complicated, and not quite so certain in its action as the present one. tube 4, and issues through (at a low and constant pressure ; # is a metal valve operating upon a seating at top of A, and capable of completely closing the aperture; C is a rod to which the veying the gas after it has passed the valve 2, D isa double frame, to the underpart of which the rod C is fastened, and which, as it rises or working upon spindle, F, in a nut. tion of the eccentrics causes the prise and fall, and so operate. corrugated tube of indiarubber, having a bellows motion; the --“* are. fastened admitted past valve 8; AZM are levers arranged fastened, as shown, to cap JZ, and, acting upon the eccentrics HE, cause (when the cap Z is raised) the frame J to fall, and thus to close the valve B. It will be seen from the above arrangement that the greater the quantity of gas admitted through B into the regulator the tighter B will be closed, and that as the contents are reduced the cap L will fall, and more gas will be introduced through &. The bellows is enclosed by a cover FY, within which is the spring O acting upon cap L. This spring is regulated to give the required exit pressure. greater will be the pressure at which the gas will be emitted at P. In our next issue we hope to give a description which has recently been placed on the market. The gas at high pressure is introduced at the valve B is attached, and works on the tube, con- falls, opens and closes the valve B, & represents: two eccentrics a common. which is per-manentlyfixed. forked. The rota- frame D to on the valve. B; AH isa endsof bellows: to casing K and cap Z, which allow of expansion: and retraction according to the quantity of gas. in the form known as lazy tongs; these are: It is obvious that the stronger the spring Otl e and diagram of anew and simple form of regulator: er >