Journal of the Franklin Institute, Volume 33; Volume 63Pergamon Press, 1857 Vols. 1-69 include more or less complete patent reports of the U.S. Patent Office for years 1825-59. Cf. Index to v. 1-120 of the Journal, p. [415]. |
Other editions - View all
Common terms and phrases
adjustable apparatus application arrangement Assignor attached average axis beam boiler carriage cast cast iron centre chamber Charles Ellet City Claim Claim.-"The coal combination connected Connecticut connexion construction cut-off cutter cylinder dams diameter disk equivalent evaporation experiments feed fire flues frame Franklin Institute friction furnace grooves gutta percha hammer heat ice boat Improved Machine Improvement in Machines invention consists iron John Journal length lever Machinery manufacture Massachusetts means mechanism metal metre miles mode motion mountain movable navigation obtained Ohio River operation passing patented Pennsylvania Philadelphia pipe piston placed plane plate pounds pressure pump purpose quantity Railroad reservoirs revolutions per minute revolving rollers screw shaft side sliding slotted smoke pipe spring square inch Steam Engines STEAM HAMMER steamers surface tion tubes valve vertical vessel weight wheel whereby wire wrought iron York
Popular passages
Page 251 - I have indicated. We have therefore in this mode of measurement all the accuracy we can desire ; and we find in practice in the workshop that it is easier to work to the ten-thousandth of an inch from standards of end measure than to the one-hundredth of an inch from the lines on a two-foot rule. In all cases of fitting, end measures of length should be used instead of lines.
Page 437 - The intensity of the blow may be modified instantly by the attendant, so as to suit the work; and the Ram may in like manner be arrested in its descent at any point, so that it is more completely under control than any other form known. 3d, It may be adapted to any description of work, whether for hammering...
Page 181 - Pinson's artificial ivory, consisting of a compound of gelatine and alumina. This material is prepared in the form of slabs, for the photographer's use, in this way : The tablets or slabs are composed of gelatine or glue in its natural state, and are immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to...
Page 216 - The object of this arrangement is to form a truck, somewhat flexible, which enables the drivers more readily to traverse the curves of the road. "The writer has never permitted the power of the engines on this mountain road to be fully tested. The object has been to work the line regularly, economically, and above all, safely ; and these conditions are incompatible with experimental loads subjecting the machinery to severe strains. The regular daily service of each of the engines is to make four...
Page 42 - ... ordinary construction. By thus subjecting the granules of iron in presence of the sparry iron ore to a melting heat, the enwrapping oxides will first effect a partial decarbonization of the granulated iron, which decarbonization will be limited in amount according to the size of the granules operated upon ; and, by reason of the continued application of heat, the iron will melt and separate (with the assistance of the melting residues of...
Page 216 - These three cars when full, weigh with their loads, from forty to forty-three tons. Sometimes, though rarely, when the business has been unusually heavy, the loads have exceeded fifty tons. "With such trains the engines are stopped on the track, ascending or descending, and are started again, on the steepest grades, at the discretion of the engineer. "Water...
Page 288 - Нлмякн, now so generally introduced into this and other countries, of which they are the assignees and sole Agents for the United States. Up to the present time there have been made by the Patentees in England, for that country and the Continent of Europe, between two hundred and fifty and three hundred hammers, for Government, Railway...
Page 181 - ... sufficient time to become thick enough for the purpose for which they are required, and to allow the alumina to entirely penetrate them and incorporate itself therewith ; they are then removed and allowed to dry or harden, when they may be dressed and polished by any of the ordinary and well-known processes for polishing ivory. Artificial ivory tablets, capable of bearing a fine polish, may also be made by mixing alumina directly with gelatine or glue ; but this process is not so satisfactory...
Page 437 - Ram falling vertically, the surfaces of the bitts upon it and the anvil are always parallel, giving facilities for flattening a ball or faggot of any thickness; and the fall being far greater than that of any helve hammer, a much thicker mass may be placed under, without choking it.
Page 201 - The whole image comes out in relief with all its details, and, when properly done, with all its brilliancy. If the original is a photograph, chalk, sepia, or Indian ink drawing, the copy represents the different tints in grains ; if in lines, the copy will reproduce the lines. When sufficiently developed, it must be washed with spirits of wine. The surplus moisture is removed, and the plate is covered with a mixture of copal varnish, diluted with spirits of turpentine. After some time, the superfluous...