The copper era., 1911-09-22
.MORENCI NEWS

The shift bosses and fOremen around
 the mines of Morenci, haze for d
 long time felt the need of more ac-
 curate ways of keeping track of the
 exact number of cars of ore hand
 led iu the mines in the various
 places It was easy enough to as certain the exact number of cars and the weights that went to the scales
 for weighing, but it was not so easy
 to determine at all times, just how
 much ore was taken from a certain
 stope or drift, as it was perhaps run
 in with other ore from other places
 before reaching the surface and the
 weigher, and so the necessity arose
 for producing something that would
 give the desired result. A box was
 finally made with string pull, and
 as the train came out of d tunnel one
 of the trammers was supposed to get
 off the train and pull the string as
 many times as there were cars in the
 train. This would be all that was
 necessary were they sure that the
 trammer did not forget, O. if some
 boy did not come along and pull the
 d
 cars that were not handled, so the
 needs were still unsupplied, and none : eSa the market that would adequately
 cover the situation. Frank Mclean,
 began figuring to ill this want for
 his own benefit and for those around
 him, who wished to know the amount
 of ore they were producing. and to
 ke. hle fn kRPn a check on the work being done under his Supervision resorted to the old idea that necessity was the mother of invention and proceeded to evolve pla ns for building registers that would
 tell the number of trips made by
 mine hoist, and also one that accuI
 ately records the number of cars coming out of any certain drift. The first hoist register built by MT. Mclean. he says was crude in some ways. as he only had the idea and wanted to perfect it by workigg it out in practice rather than theory, which he did, making most all of the first of these machines from scraps and pieces in order to see what effect 1 could be had from them. He found l that they could be worked out in good . shape.
 This little apparatus is figured and . built SO that weight attached to d cable and attached on the hoist fol- lows the movement of the hoist and an ink pen, as is found on steam and peW9r registers of various kinds, shows the movement of the cage on a paper f record sheet placed on a cylinder, whicb at first as an experiment and as determination of time, was ar Tauged. with an ordinary alarm clock This was tREgf for a period of two months, and proved satifactory, show ing ia detail the number Of trips made by the hoist, giving all the movements of the Sd me ard showing from what level each trip ~ss made. It is easy to determine in this way just what a hoist has done in the period ot any given time as the register shows plainly when the hoist is standing idle and every movement made byit. After observing the move ments of his invention, MT. Mclean began to note where improvements could be mad and with the aid of the hoisting engineers suggestions they gradually found the small defects and they have been remedied until now MT Mclean fells confident that his invention is d success rather faSn an experiment, and as very pto oSninent mining man who was in t0lyn a short time ago has offered to take the matter off his hands alto- gether and to pay for the trouble and for handling the little register, MT. Mclean has reason to think he has r succeeded in perfecting d thing [ which has really been i1 demand for 3 some time. The very simplicity of ) the arrangement makes one wonder ~hy it had not been invented some [ time before, hut 90 it is with many other thing- that are very useful and needful, as after we have them bt = fore us and see how simple they are a nd how easily they work, we wonder i why they cold not have been thought r dut before, but that is different V skory, as it is much easier to figure 2 il out after it is shown to one than 3 fcT them to sit down and work it out [ with only indefinite idea to start t on, md with no precedent whatever to go by
 The second register, is purely a t one, and is built with the C idea of getting the exact nun OCT of I cars coming out O. certain drift t tunnel or stope where d track is run t