30 



HARDWOOD RECORD 



A. C. Quixley, Quixley & Bulgrin. 



L. F. Ross, Lumber World. 



Thomas B. Roy. Theodore Fathauer Company. 



A. H. Ruth, G. W. Jones Lumber Company. 



W. H. Schleyer, K. & r. Lumber Company, 

 Cincinnati, Ohio. 



Paul Schmechel. 



Alexander H. Schoen, Columbia Elardwood 

 Lumber Company. 



William C. Schreiber, Herman H. Hettler Lum- 

 ber Company. 



Louis A. Smith, FuUerton-Powell Hardwood 

 Lumber Compauy. 



L. E. Starr, Starr Lumber Company. 



W. M. Stephenson, Supreme Represeutatiye 

 IIoo-Hoo. St. Paul, Minn. 



George R. Thamer, Empire Lumber Company. 



E. A. Thornton, E. A. Thornton Lumber Com- 

 pany. 



H. D. Welch, E. A. Thornton Lumber Company. 



L. H. Wheeler, Wheeler-Timlin Lumber Com- 

 pany. 



Vernon A. White, Ilayden & Wescott Lumber 

 Company. 



A. W. Wylie. 



Applying Motors to HeaVy 'Band 



ResaWs 



Electric motors are especially aiiplieable 

 to driving heavy timber band resaws, and 

 a selection can be made from standard 

 motors to meet almost any required set of 

 operating conditions. Such machinery re- 

 quires very high starting torque on account 

 of the high flywheel effect of the lower re- 

 saw pulling and the stress of the heavy saw 

 blades. The stress on the blades as well 

 as the size and weight of the pulleys varies 

 with the width of the blade. The 6-inch 



two general types; viz., those with squirrel 

 cage rotors, having no current collecting 

 device whatever, and those with phase 

 wound rotors having collector rings. There 

 is practically no sparking or flashing from 

 these collector rings, and all danger can be 

 removed by enclosing the rings. 



Squirrel cage induction motors will usual- 

 ly develop all the starting torque required, 

 but in doing so necessarily draw heavy cur- 

 rent from the supply system. If the same 



A1'1'I.\IM. W I.S rlNi;il()l SE MUTOK TU .\1I-.K.->1HI.\ KIOSAW 



blade show-n in the accompanying illustra- 

 tion is normally under a working stress of 

 about 2,500 pounds per square inch. 



Alternating current motors are generally 

 preferred for driving woodworking ma- 

 chinery, largely on account of absence of 

 commutators and decreased fire hazard. Di- 

 rect current motors are sometimes used, and 

 if entirely enclosed can be made very safe. 

 Alternating current motors are available in 



larily high current from the lines. Another 

 plan is to employ a phase wound motor, 

 which will start with full load torque while 

 taking very little more than full load 

 current. 



The heavy timber band resaw shown 

 herewith was installed in the mill of Wm. 

 D. Gill & Sons at Baltimore, Md., by Wm. 

 B. Mershon & Co. of Saginaw, Mich. In 

 this installation it was especially essential 

 that the motor start with the least possible 

 disturbance to the line voltage. A West- 

 inghouse type HF motor with enclosed slip 

 rings as well as an idler pulley were there- 

 fore employed, and with very satisfactory 

 results. 



The belted connection permits relatively 

 high motor speed with correspondingly 

 lower installation cost than with a direct 

 connected motor. The platform places the 

 motor out of reach of much of the dust 

 and of the workmen, while at the same 

 time affording a convenient place under- 

 neath for the conpact installation of the 

 controlling apparatus and the wiring. In 

 this ease the wiring is neat and safe with- 

 out the use of conduit and without pene- 

 trating the floor or wall. 



In some cases it might be found prefer- 

 able to avoid the expense of the platform 

 by mounting the motor directly against the 

 wall or on the ceiling either above or below 

 the machine. Sometimes the motor is 

 mounted on a foundation on the floor be- 

 low and bolted up through to the driven 

 pulley. 



supply system feeds both motors and lights, 

 the latter may be disagreeably affected ev- 

 ery time a motor is started under the fore- 

 going conditions. 



One method of starting such machinery 

 without affecting the lights is by means of 

 an idler pulley whereby the bolt can be 

 tightened gradually after the motor is un- 

 der headway. By this method the motor 

 starts free and will draw only a niomen- 



Can Save Much 



United States Forester Ilonry S. Graves, who 

 receutlj' returned to Washington from an exten- 

 sive trip through the West, has given out some 

 interesting ideas on the forest flres and timber 

 conditions in that section. 



"The fires were the largest we have ever 

 had," said Mr. Graves, "but the damage is not 

 as great as might appear at first glance. I 

 mean that while vast areas were burned over, 

 there will be considerable saWage. 



"I have not been able to lornl any accurate 

 estimate of the damage as yet. There have 

 l;een many guesses made, but there is little 

 dependable data to base them on. I have men 

 in the field now going over the forest fire areas 

 and estimating the damage and the amount of 

 timber that can be saved from the burned for- 

 ests. I expect to have reports from them about 

 November 1, so that I can prepare a report 

 approximately accurate for the information of 

 Congress. 



"Nobody as yet knows how much forest land 

 was burned over or how much timber can be 

 saved, but these matters are being studied by 

 private timber land owners as well as govern- 

 ment agents. A great deal of the private tim- 

 ber can be saved, undoubtedly, because it is 

 located near transportation lines and in accessi- 

 ble places. The government timber that was 

 killed by the fire can be saved, provided it is 

 logged out soon enough. If this could be done 

 in two or three years the salvage would be large, 

 but this will he impossible because much of the 

 burned timber is many miles from any railroad 

 and on high mountains. The Forest Service 

 will sell what it can as soon as possible. Some 

 varieties of timber will not deteriorate much, 

 though dead, for many years. Cedar is one of 

 these." 



