Inventions. A New Foot and Hand Power Saw.

Progress, Volume I, Issue 4, 1 February 1906, Page 83

Inventions.

A New Foot and Hand Power Saw.

{This page is reserved for the use of inventors who desire to bring their inventions before the notice of manufacturers and others. For information apply to the Editor.']

No. 18,044, dated August 19th, 1905.— Radiator. —Hamilton.— The gills for the radiator tubes are formed from a strip of metal (B), which is first perforated as shown at 82, Fig. 3, projections (B3) being formed which extend into the perforations.

The perforations are of uniform distances apart, these distances being equal to the pitch or depth of the corrugations. The strip (B) is then pressed between dies, which bring it to the shape shown in Fig. 4, the projertions (B3) being bent out from

The Seneca Falls Mfg. Co., 567 Water Street, Seneca Falls, N.Y., U.S.A., are introducing a new " Union " combination rip and crosscut saw (No. 5), of which the accompanying is an illustration. These are built in large numbers by special machmery, and are designed to meet requirements of carpenters, builders, cabinetmakers, and woodworkers generally. The iron frame, which is strong and rigid, has cold-rolled steel shafts, with hand-scraped babbitt metal-lmed boxes, adjustable to take up the wear. The table top is of wood and iron, 28m. wide by 36 in., long, the centre part, 10 m. by 36 in. being of iron, planed perfectly true. This is hinged at the back, and can be moved upwards or backwards, by means of a hand-screw in front, for rabbeting, grooving, dadoing, etc. The self-feed ripping device — which has three changes of speed — is self-adjusting for all thicknesses of wood, and is positive m its action, the power being transmitted by gears. It is easily detached when the table is required for crosscuttmg, etc. By means of the extension rolls, the length of the table may be increased to 7 feet long when long stuff has to be cut ; but when not required, they may be immediately folded down out of the way. The machine has two hand powers, in employing either of which the operator is able to maintain a natural upright, and, therefore, easy position. That at the rear (for one or two cranks) leaves the table entirely free for crosscutting. The foot power is, the manufacturers claim, as perfect as can be, power being transmitted entirely by automatic, machine-cut chain gears and chain belts, doing away with slip and lost motion. It is stated that, with this machine, one man can, with ease, rip soft wood up to 3£ m. thick, and hard wood up to 2 in. in thickness, doing as much work m the same time as would be got through by four men with hand saws. It is also useful for crosscuttmg, mitremg, etc., and, with attachments, may be employed for bormg, scroll-sawing, edgemoulding, beading grooving, etc. The fullest particulars as to price, etc., of this and many other foot-and-hand-power woodworking machines may be obtained by addressing the Seneca Falls Mfg. Co.

A method of measuring turbine power has been invented by Mr. Johnson, of Messrs. Denny and Brothers, Dumbarton, builders of the bulk of the Union Company's fleet. All that can yet be done is to specify power equivalent to so much horse power as developed by reciprocating machinery, though horsepower of the turbine is not capable of exact measurement m the same way. The new instrument measures by electrical means the torsion of the shaft over a certain length. The Admiralty has been recently trying the instrument on a turbine destroyer, and if the results promise well it may be tried on the Amethyst, the turbine thirdclass cruiser.

New Process of Cutting Metals. — A demonstration was given daily in the Pavilion of the Societe

Anonyme l'Oxy Hydnque at the Liege Exhibition, of the Jottrand process for cutting metals by a jet of oxygen. The apparatus consists essentially of a tube with two branches, terminating in blow pipes, moved along a guide m front of the metal plate or part to be cut, at the rate of about 6 in. per minute. One of the blow pipes delivers an oxyhydrogen flame, which raises the metal, where it is to be cut, to a temperature corresponding with dark red. The following blow pipe delivers a jet of pure oxygen, which enters into combustion with the hot metal, thus producing a clear channel, like a saw cut, about £ m. thick, the remainder of the metal being unaffected by the operation.

No. 17,961, dated August iBth, 1905. — Clerk and Others. — The Piston (r) of the low pressure cylinder is connected to a piston (p) working in

an air compression cylinder. Air is admitted by ports (u) at the base of the cylinder, and a weak mixture is drawn into the cylinder from a conduit (y) controlled by a valve (w). The charge is compressed mto the high pressure cylinders (a) through

passages (s) controlled by valves (t), one of these valves always being closed by the pressure of gas within that particular cylinder which will perform its working stroke at the moment when the other cylinder is being charged. The exhaust gases pass by valves (d) into the low pressure cylinder (b). The stems of the valve (d) are made gas-tight by packing rings (di). The high pressure cylinders are charged at a pressure considerably above that of the atmosphere with a weak mixture, so that very high average pressure is obtained in the high pressure cylinders, together with a low terminal temperature for transference of the exhaust to the low pressure cylinder, whilst at the same time the high pressure

exhaust is kept at a pressure sufficiently high to enable the power to be nearly equally divided between the cylinders.

the body of the strip m such manner as to form recesses (Bi, Fig. 5) adapted to receive the radiator tube (A). Before fixing the gills in position upon a tube the strip is compressed longitudinally so that it is made to assume the shape shown in

Fig. 6. The projections (B3) are thus brought close together, and make good contact with the tube. Two such strips are placel on opposite sides of the tube and connected together by tongues (B4) and are bent over to connect the strips as shown in Fig. 2.

The Future of the Gas Producer. — Speaking recently before the American Institute of Mining Engineers, Mr. S. S. Wiger expressed the belief that the time is not far distant when gas-producer locomotives for railway road service, gas-producer portable engines, and gas-producer power plants for marine service will be in common use.