. Electrical world. lowsthe compound rest to swing around parallel with the ways and overthe base of the tail stock with room to operate the feed screw spindle has an improved locking device, and the tail stock isprovided with side adjusting screws for turning tapers. There is along bearing on the bed and it is locked in such a manner as torender it firm and rigid. The carriage has a long bearing on the ways and is gibbed to thebed both front and rear. A cam-locking device locks the carriage tothe bed when using the cross feed. The cross feed screw has agraduated collar which reads
. Electrical world. lowsthe compound rest to swing around parallel with the ways and overthe base of the tail stock with room to operate the feed screw spindle has an improved locking device, and the tail stock isprovided with side adjusting screws for turning tapers. There is along bearing on the bed and it is locked in such a manner as torender it firm and rigid. The carriage has a long bearing on the ways and is gibbed to thebed both front and rear. A cam-locking device locks the carriage tothe bed when using the cross feed. The cross feed screw has agraduated collar which reads in thousandths of an inch and can beset at zero in any position. Plain and compound rests are regu-larly furnished and easily interchanged. The base is graduated 180and renders the compound rest capable of fine adjustment. The toolpost has a patented collar and shoe which exclude all dirt and chipsand admit of quick, easy and secure adjustment of the tool. The automatic cross and longitudinal feeds are actuated by a. FIG. 2.—INTERIOR VIEW OF THERMOMETER-THERMOSTAT. temperature where the instrument is located. This arm is operatedby one of Bristols recording thermometer tubes placed in the per-forated protecting projection extending from the back of the case,as shown in the illustration. On the back of the indicating pointer,E, there is a raised portion which makes electric connection withthe contact pieces. A novel feature of the instrument is that the temperature indi-cating arm £is not restrained by the thermometer-thermostaticcontacts. Thus it will be seen that the controlling efifect of thethermostat is perfectly adjustable as to position on the scale of the SCREW-CUTTING BENCH LATHE. phosphor-bronze worm on the lead screw, receiving its power fromthe head spindle through spur gears. The lead screw is splined andsimply acts as a feed rod, hence the only wear on the threads is inscrew-cutting. The automatic feeds are almost indispensable for alarge variety of work, as the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
