. American engineer and railroad journal . d by the Arm-strong Manufacturing Company. This tool,it is claimed, is the strongest and most rapidworking pipe cutter on the market, and itis also the cheapest : this by reason of itstaking a larger range of pipe than anytool known that is made for a like pur-pose, viz., from 1A inches to 4 inches, inclu-sive. The change from the smallest to the lat-est size is made by simply raising a pawl andallowing the hooked bar to slide change to a smaller size the hooked bar ispushed in to the required size, when it i-ready to cut. The thread on the
. American engineer and railroad journal . d by the Arm-strong Manufacturing Company. This tool,it is claimed, is the strongest and most rapidworking pipe cutter on the market, and itis also the cheapest : this by reason of itstaking a larger range of pipe than anytool known that is made for a like pur-pose, viz., from 1A inches to 4 inches, inclu-sive. The change from the smallest to the lat-est size is made by simply raising a pawl andallowing the hooked bar to slide change to a smaller size the hooked bar ispushed in to the required size, when it i-ready to cut. The thread on the handle isonly ued to follow up the cut as the cutteris revolved about the pipe. This cutter maybe changed from a three-wheel to a one-wbeel cutter by simply substituting rollersin place of the two cutter wheels at the endof hooked bar. Full information will be furnished ourreaders upon application either to the homestrongPipe Cutter. 0ffice 0f the Armstrong Manufacturing Com-pany, at Bridgeport, Conn., or 139 Centre street. New Sextons Omnimetre. A convenient form of calculating instrument, similar in prin-ciple to the well-known slide rule, has been devised by Mr. Sex-ton, who is connected with the Southwark Foundry and MachineCompany, and placed upon the market by Messrs. T. Alteneder& Sons, of Philadelphia. The new instrument is in the form ofcircular non-absorbent disks of bristol-board, secured concentric-ally upona pivot fastening so that one may be revolved witlirelation to the other, and may be secured in any desired positionby a thumb screw. The disks, as shown in the accompanyingengraving, carry concentric circles accurately divided into partswhich are proportional to the logarithmic valves of the functionswhich they represent, and the principle upon which the instru-ment is arranged is that of the slide rule, namely, that the loga-rithm of the product of two numbers is equal to the sum of thelogarithm of the numbers and the logarithm of the quotient oftwo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
