No. 10 or .134 of an inch thick, 5.5 pounds. No. 12 or .109 of an inch thick, 4.3 pounds. No. 16 or .065 of an inch thick, 2.62 pounds. No. 18 or .049 of an inch thick, 1.92 pounds. No. 20 or .035 of an inch thick, 1.41 pounds. No. 24 or .022 of an inch thick, .95 pounds. No. 26 or .018 of an inch thick, .78 pounds.
A Plate of Wrought Iron 1 foot square, 1 inch thick weighs 40 lb. “ “ “ 1 inch “ 3⅝ “ long “ 1 lb. “ Cast “ 1 “ “ 3⅞ “ “ “ 1 lb.
This is an article long wanted in a number of situations where power is applied by stiff gearing, such for example, as where one or more run of stones are driven by spur or bevel gearing. The coupling is secured to connect the ends of the principal driving shafts as in the style of an ordinary coupling, or in case of back-lash in the mill spindles it is placed immediately above the gear in such a manner as to allow it to be easily moved up out of gear, at the same time producing an elastic movement in the transmission of power. It gives the advantage of a belt connection in a great measure, in allaying the jar produced by fast running gear. It is constructed of cast iron in two parts, with a space or opening between to receive the requisite number of large stiff rubber springs; each half is secured independently to the ends of the two shafts needed to be coupled, and the power is transmitted by pressure upon the springs; a like connection is made with the gear or trundle-head and mill-spindle of a mill stone. They are furnished of different sizes to suit the situation and amount of power to be conveyed.
This is a clear representation of the style of our bevel core gear patterns. It was engraved from a photograph taken direct from the casting to show correctly the proportion, shape, &c. With this style of gear, as well as those for spur gearing, we are sufficiently supplied to meet most any reasonable demand. All our patterns were made for the purposes of flouring mills, with a view to avoid superfluous metal, at the same time, to make them strong and in good proportion. Our spur bolting gear patterns have been prepared with special care; the patterns being iron with the teeth cut from blank rims by a gear cutter, they remain true and from these always make true castings. The arms are curved and oval in shape, and the whole of a design exactly meeting the tastes of the most skillful mill-wrights.