Some cool 4 axis milling pictures:
Image from web page 368 of “Canadian mining journal January-June 1905” (1905)
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Identifier: canminingjjanjun1905donm
Title: Canadian mining journal January-June 1905
Year: 1905 (1900s)
Authors:
Subjects: Mines and mineral sources
Publisher: [Don Mills, Ont., Southam Business Communications]
Contributing Library: Fisher – University of Toronto
Digitizing Sponsor: University of Toronto
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legs and is firmly constructed towithstand underground use. When moving from one particular level to an additional the transit tele-scope is covered with a canvas bag. A button is put on every plumb-bob string, which will slideup and down, and which can be set at any height necessary. month. It is carried out as follows. (See Kind III, workingmap, 4th level west of shaft.) The transit, tape, plumb-bobs and rod are employed. The instrument is set up beneath sta-tion °75. Station °76 possessing been place in and plumb-bob hung, thehorizontal plate of transit is placed to study 0° and clamped tovernier. A back sight is then taken on the plumb-bob stringon Station °6g. The vertical axis is then clamped to plate andvernier let loose. A fore sight on Station °y6 is taken and ver-nier clamped and read. The vertical axis is then loosened andthe operation is repeated, thus doubling the former reading, ifwork is appropriate. If these do not agree, the angle is read athird time. The vertical vernier is set to read 0°, as a result producing
Text Appearing Right after Image:
Measurements of Advance.—The progress created in drifts,winzes and raises is measured on the ist, iith and 21st of eachmonth. This is carried out roughly with the steel band*tape. Thedistance is measured parallel to sides of drift. Measurementsare typically taken from some station if possible, or else somemark positioned on a earlier measurement. This measurementis taken in connection with the calculation of the spend given tomen when operating on contract. Kind I shows the method ofnoting these measurements. Reports are produced out eachmonth and handed into the basic office. (See Type II).Survey of Advance.—The advance created in the mine is the^ progress made in the drifts, cross-cuts, and so forth. The advance is■ surveyed accurately for plotting on the ist and 15th of each and every telescope line horizontal. The button on plumb-bob string isset in this horizontal line. The horizontal distance betweenthe centre of the telescope and button is then measured andchecked two or 3 times. The height of instrument ab
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Image from page 425 of “The miller, millwright and millfurnisher” (1882)
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Identifier: millermillwright00grim
Title: The miller, millwright and millfurnisher
Year: 1882 (1880s)
Authors: Grimshaw, Robert, 1850- [from old catalog]
Subjects: Flour mills
Publisher: New York, H. Lockwood
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
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e bran becoming lighter following each operation. In largemills the initial set of bran rolls may be eight to ten inches in diameter with300 to 500 corrugations, those for the last operation getting 800 to 900grooves for the identical diameter. It is found that these fine rolls wear outquickly, and that a pair of burrs is a good adjunct to them. Oexle finds that thegreater the distinction amongst the roll speeds the much better the bran is cleaned sOthat whilst he commenced with i to three he now tends to make i to 250 and even i to 300.Oexle tends to make the grooves on the down roll finer than these on the up roll,and makes those on the fine roll straight and parallel with the roll axis. He 402 Information OF ROLLERS AND FRAMES. claims for these a quite exact feed, regular wear of the rolls, cleaner scrap-ing, and significantly less stress required than with coarser corrugations. This last, ofcourse, giving longer life to the rolls. In one particular patent of Oexle both the rollsmay in about twenty minutes be produced to run down so that they may be
Text Appearing Soon after Image:
Fig. 287.—Grays Roller Frame. run in 1 direction for far more than one break and in the other for the other people.This will permit the method to be introduced into smaller sized mills. Grays Roller Frame.—The new two-pair middlings roller machine,Figs. 287, 288, constructed by E. P. Allis & Co., Milwaukee, Wis., has the followingdimensions : height, 5 feet six inches width, four feet 9 inches length, four feet 9 GRAYS ROLLER FRAME. 403 inches driving pulley, 18×5^^ inches motion, 250 to 275 revolutions ca-pacity, three to four barrels per hour energy required, 3 to four horse (estimated).This exact same style of mill is constructed with eight-^x 14 inch rolls. The middling machines, with porcelain rolls, built by E. P. AUis & Co.,have the followmg dimensions: height, 5^ feet width, 3 feet 9 incheslength, 4 feet six inches diameter of driving pulley, 16 inches, by five inchface capacity two to 3 barrels per hour energy estimated at 2 to three horse speed, 250 to 275. Belts are utilized by explanation of their becoming noiseless, an
Note About Pictures
Please note that these images are extracted from scanned page pictures that may have been digitally enhanced for readability – coloration and appearance of these illustrations may not perfectly resemble the original operate.