This cut represents our PORTABLE UPPER RUNNER MILL. The heavy runner in addition to being built in balance is provided with five improved standing and running balance weights, adjustable with screws. (See under head of “Standing and Running Balance.”) This mill has the self-tramming irons set forth under its proper head; improved silent feed rig; wrought iron spindle with steel ends; steel cock-eye in runner stone; a tram step to tram by means of screws; the oil fountain bush and followers; pine stave curb or hoop banded with iron under walnut finish; stones faced and furrowed, of a good selection of French burr, of sharp even quality, and other additions and advantages not necessary to mention, all made complete with pulley as shown in the cut, or gear as shown on page 16, and secured in a strong ash husk frame. The step-irons used in this mill admit of our using a much longer spindle without making top of mill higher than usual. The principal improvements on this mill have been secured to us by two distinct Letters-Patent.
-------------+-------------+---------------+-------------- Diameter of | Diameter of | Width of Belt | Revolutions Stones. | Pulley. | to drive. | per minute. -------------+-------------+---------------+-------------- 30 inch. | 20 inch. | 8 inch. | 360 36 inch. | 24 inch. | 8 inch. | 300 42 inch. | 30 inch. | 10 inch. | 240 -------------+-------------+---------------+--------------
Are furnished with our improved low down Set Screw Step, giving a spindle one-fifth longer than any other mill with same height of hopper, and constructed in the ordinary manner.
With this step the spindle is trammed by means of set screws, thus making it more readily and accurately adjustable, at the same time avoiding the liability of getting out of tram. This step is so constructed as to avoid changing from its true position or out of tram, when the runner stone is raised or lowered by the lighter screw. The _husks_ of these mills are made of ash timber, strongly bolted together with wrought iron joint bolts. We furnish turned iron pulleys balanced and keyed to the spindle, so they can be raised or lowered at pleasure. The curbs around the runners are of the kind shown and described under head of “Mill Curbs or Hoops.” The feed rig, either our improved silent, or shoe and damsel, as may be wanted by the purchaser, or for the purpose required.
