Document 91qBBXy5EryLvzVkXx5LjYBLV

FILE NAME: Caterpillar (CAT) DATE: 1937 July DOC#: CAT034 DOCUMENT DESCRIPTION: Trade Journal Article - Pit & Quarry --J Voi. 30 Published on the tenth of each month for producers and manu facturers of Cement, Crushed Stone, , Gypsum, Lime, S e n d , Gravel and other nonmetallic min erals. Copyrighted i 937 by Com plete Service Publishing Co., 538 South Clark Street, Chicago, HI. H, W . BAUMGARTNER President STANLEY A. PHILLIPS Vice-President end Directing Editor Pieid Editor; W . E. TRAUFFER Assistant Editor: HARRY F. UTLEY C o n trib u tin g E ditor: WILHELM CARL RIETH Circttietion Manager: W , T. KLUSSMAN Advertising Manager: JAM ES E. MONTGOMERY Telephone HARrison 9357 Chicago, III. Eastern Advertising Manager: W . A . BUSCHMAN Room 420, 122 East 42nd St. Telephone CALedonia 5-4438 Now York, N. Y . Central Advertising Manager: W . H. SANDERSON Auditorium Bldg. Telephone CHerry 6339 Cleveland, O . Advertising Representatives: FRANK G . LAUGHTON New Yorlt, N. Y. D. R. EGBERT Chicago, III. Field Representatives: A . C . PETERSEN J. K. GARESCHE July, 1937 CONTENTS News of the Industry .................................... 29 Editorial: Intimidation in Labor Disputes . . .34 Reports Presented at A. S. T. M. Meeting. .36 Special Cement-MillSection .......................... 37 Marquette Completes Part of Improve ment Program ......................................... 43 Closed-Circuit Grinding with Air Separators ............................................... S3 Separators Improve Grinding Efficiency. 63 Saving in Air-Compressor Applications.. .67 Cement as Engineering Material to Stay. .71 Bowl Mills and Recuperators Responsible for Power and Fuel Savings ................73 The Autoclave-- New Cement Soundless T e s t .......................................................... 77 Crusher Changes Affect Entire Plant.........79 Past, Present end Future of the Occupa tional-Disease Situation.......................... 83 News and Views from the C a p ita l.............. 86 The Future of Labor Relations...................... 89 Regulating Hours in the Aggregates I n d u s t r y .........................................................91 Research fn Industrial Sand Industry............ 93 Profitable New Products S e c tio n ................ 97 A Product Easy to Enthuse About! _______ 98 Steel Industry Uses Own Slag in Concrete 100 Truck-Mixer and Agitator Standards.. . . 102 Men of fhe Industry....................................107 Personal M ention........................................108 Foreign Developments............................... 109 Traffic News Digest....................................110 New Machinery and Supplies.................. 112 ffe'. Fast, Present and Future of the #Occupational-Disease Situation* y C. O. SAPPINGTON, M. 0. gEonsultins Industrial Hygienist OU will recall in your high-school history courses that this study was divided into several parts, one per taining to ancient history, one to medie val history and another to modern hiswssfctnry. It will be rather convenient in "^presenting this review of the occupa..jjonal disease situation to make compargjjons between these kinds of history and ' he periods of evolution through which ,n,j have passed with regard to occupa"jonal-disease conceptions. VDur past experiences may well be )mpared to the period of ancient hisy y and this period may also well be '`led the stage of guesswork and hys; ia. Your interest and the interest of 'host people has been in the spectacular, ~' :J, in fact, this has been the basis for impensation laws in regard to mechanil injuries. There is nothing spectacpr about occupational disease in the jin and so your main interest has been '"flaws or in problems because people ""e continued to be crippled and killed mechanical forces. There is no such ect appeal with regard to occupa'ftal disease. Then along came the pression with the effect of producing "flhumber of spurious cases, which re ted in a great burden being placed ~n industry in regard to the economic ation. l addition to these factors there has il a lack of general knowledge and trained men in the field of occupaTal-disease difficulties. All these fackave resulted in the production of gies and unrest, hence the reason for "Inlying the name of guesswork and 'Steria to this period of evolution in "'pational diseases as the stage. . .ur present experience may well be .jjed to the period of medieval his- It is now believed that we have f&c somewhat past the bogy stage, a swing' to the factual and this e may well be called the stage of As evidence of the swing to ^factual, last year occupational-disw.cmpensation legislation was in deed in more than forty states and Updivered before the Engineering Division, ^ r Chicago Safety Council, Dec. 17, 1936. i 1937 as a result of this activity a number of states have actually passed laws, includ ing Illinois. In this stage, when emphasis will be placed upon factual evidence, plant sur veys and studies have become more popular; examinations, including Xrays and clinical laboratory tests, have now come into use more widely. These devices will be used more and more to get facts in this stage of reality. The future, which overlaps somewhat upon the present and includes develop ments in the immediate offing, may well be likened to the period of modern his tory. This may be called the stage of progress. I predict that compensation for occupational-disease disability will be general in the United States within the next five years, that physical exam inations will become universal within the next ten years, and along with this will be an increased use of surveys and studies of industrial environment. As a practical outline of important sources of difficulty relating to occupa tional diseases, let us merely mention the following: f 1. Dust (silica and asbestos-contain ing dusts). V 2. Metals (lead, cadmium, chro mium, mercury, thallium). 3. Gases (carbon monoxide, sulphur dioxide, hydrogen sulphide, arsine, the nitrous group, cyanogen compounds). 4. Vapors and solvents (benzol and its homologues, the chlorinated hydro carbons, and others). 5. Skin irritants (soaps and cleansing powders, dyes, oils and greases, dusts and powders, solvents, agents of infec tion). This is not in any way to be con sidered an exhaustive list, but a number of the "high points" of importance have been picked as the chief possibilities or probabilities relating to occupational dis ease and these have been mentioned. It is significant in this connection that when the U. S. Public Health Service made a cross-sectional survey of in dustries and published its results in the year 1934, it was discovered that in order of frequency the chief exposures 2(1 u i u i i s u y M C i c a * l u u u v v a . l i t u i j u n u . dusts, carbon monoxide, and lead. There are, of course, a number of others, but these are the chief types of exposure encountered in American in dustry and those which are likely to give difficulty. It is good to remember that this cross-sectional survey was made in ten different industries, embracing 615 plants and involving 28,000 em ployees. It has been well said that the best criterion of an occupational-disease haz ard is the occurrence of occupational disease; but none of us can afford to wait, I take it, for disease to occur. At this point it might be well to make a distinction between the two words ex posure and hazard, simply because, as the U. S. Public Health Service has pointed out, if a man is exposed to lead, carbon monoxide or to inorganic dusts, it does not mean that he is ex posed to a hazard. More must be known than the mere fact of exposure; we must know the quality and quantity of exposure and then, when compared with criteria which have already been established in the production of disease, we shall be able to say whether or not a real hazard exists. Remember that a hazard is always an exposure; an ex posure is not always a hazard. Here are some concrete suggestions which are boiled down to very brief expressions, but which contain the real essence of prevention of occupational disease: 1. Find out ihe exposure and the hazard in your plants. 2. Examine your men (before em ployment, during employment on haz ardous jobs, and at the time of discon tinuance of employment). The exam inations will be different for different types of exposure; obviously an exam ination for a dust occupation will not suffice for a lead occupation. 3. Correlate cause and effect factors from the information gained by scien tific study of the industrial environment and the medical data accruing from examinations and laboratory tests. 4. Control or eliminate the hazard, or furnish adequate protection for your men. Another way of stating the above suggestions forcibly is as follows: Man agement must \now its men, materials, methods, and machines. In summary, the occupational-disease situation has become a national ques tion; it involves socio-economic prob lems of tremendous significance; it pre sents difficulties no greater than any other industrial problem if the same amount of time, money and quality of brains are used, as have been applied in the past to similar industrial situ ations. 83 rMANGANALJ Nickel Manganese Steel Reg. U. S. Patent Office Nos. 1,876.738, 1,947,167 a n d 2,021,945 With prices skyrocketing on all types of equip ment, you can avoid costly replacements by us ing Manganal Applicator Bars for rebuilding worn-out machine parts and keeping your old equipment Sn service for years to cone. Pump shells, crusher plates, dipper teeth and similar parts of 11 to 14% manganese steel can be easi ly reclaimed this way. Use Manganal Wedges for attaching to worn managanese and carbon steel shovel teeth to resist impact and abrasion. SOLE PRODUCERS For Building Up For Hard Surfacing S T U L Z -S 1 C K L E S C O .; 1 3 4 -1 4 2 Lafayette St., Newark, N. J. Index to Advertisers Allen Bheinwn Hoff Co............. Inside Front Cover Alhs-CImlmers Mfg Co................................... 72 American Manganese Steel Co................. 125 American Pulverizer Co...................................... 133 Goodyear Tire & Rubber Co.......................... 2 Gruendler Crusher & Pulv Co...................... 50 Haigs Mfg. C o, Geo.......................................... 113 Hardinge Co................... 84 Bacon, Inc,, Earle C........................................... 112 Baker & Greenberg........................................... 135 Baldwin Locomothe Works ......................... 80 Barber-Greene Co...................................... 120 Bartlett & Snow Co.. C. 0 ............................. 133 Birmingham Rail & Locomotive Co............... 135 Blaw-Knox Co............. ....................................... 105 Broadcast Section ...................... 135-139 Broderick & Basconi Rope Co........................... 133 Bucyrus-Erie C o ............................................... 22 Buffalo Scale Co................................................. 68 Burnham. Royal E :........................................... 138 Burrell Engr. & Const, fo ........................... 82 Cftinegie-lllinols Steel Corp............................. 19 Caterpillar Tractor C o .................................... 4 Cement Mill Equip. Co..................... 58 Chain Belt Co...................................................... 105 Chicago Perforating Co.................................... 113 Hardsocg Wonder Drill Co............................. 131 Hatnisciifeger Corp............. ............................... 64 Hazard Wire Rope Division of American Chain & Cable C o ........... Inside Back Cover Hendrick Mfg. Co............................................ 133 Hetherington & Berner, Inc........... 140 Hoffman Bros Drilling Co............................. 138 Holmes, Robt., & Bros., Inc........................... 131 Howe Scale Co .................................................. 116 Hug Co................................................................ 8 Hummel-Foley Corp.......................... 66 Huron Industries Co.......................................... 132 Hyman-Michaels Co.......................................... 139 Iowa Mfg. Co..................................................... 119 Independent Pneumatic Tool Co...................... 7 IngersolMtnnd C o ............................................. 52 Jaeger Machine Co ............................... Back Cover Jeffrey Mfg. C o ................................................. 125 Chicago Pneumatic Tool Co.......................... 74 Cincinnati Rubber Mfg. Co................................133 Cleveland Rock Drill Co................................. 23 Cleveland Wire Cloth & Mfg Co.................... 128 Consolidated Products C o ............................. 139 Delster Concentrator Co................................. 133 Deister Machine Co............................................. 129 DeWitt Hotels ................................................. 132 Dixie Mnehy. Mfg Co...................................... 82 Dracco f o r p ........................................................ 00 Dunn Mfg. Co , W E .................................. 106 Eagle Iron Works.................................................. 129 Enslgn-Bickfoiri C o ........................................... 20 Equipment Corporation of America.............. 135 Firle Pump & Engine Works..............................133 Exolon Co. .......................................................... 130 Kennedy-Vat) Satin Mfg. & Engi. C o rp .... 76 Koehrlng C o ...................................................... 118 Lane Co,, T. J................................................... 135 Lesehen & Sons Rope Co , A............................. 114 Le Tourneau, Inc., R. G............................... 70 Lewis, Harry C................................................. 137 Lewiston Foundry & Machine Co.................... 130 Lima Locomothe Works.................................... 11 Link-Belt Co...................................................... 1-131 LiuUow-Saylor Wire Co...................................... 40 Manitowoc Engr. Works ............................... 62 M arietta Concrete C orp.................................... 105 McLanahan & Slone Corp................................. 132 McLeod, Alex T................................................. 138 Merrick Scale Mfg. Co................................... 78 Michigan Power Shovel Co............................... 127 Flexible Steel Lacing Co.................................... 131 Frog Switch & Mfg. Co................................... 108 'Fuller Co ................................ 54 Morris Machine Works..................... 80 Morse Bros. Machinery Co............................ 134 National Industrial Invest Corp ................ 139 Gardner-Denver C o ............... 123 Gar Wood Industries, Inc................................. 123 National Supply Co............................................ 6 National Wire Cloth Co.................................... 117 <General Elec! iIp Co .................................. 12-13 General Motors Corp........................................ 21 New Holland Machine Co................................. 109 Nordberg Mfg, C o ............................................. 133 `Good Roads Mnehy. C o r p ....................... 132 Northwest Engr. Co.......................................... 18 *See also information in the 1937 Pit and Quarry Owen Bucket Co........................ 128 Parsons Engr. C o .................................. 113 Page Engr. Co........... .................. .3-115 Pennsylvania Drilling Co................................. 138 Philadelphian H o t e l . . . . . . . . ........................ 130 Pioneer Gravel Equip. Mfg. Co................. 17 Productive Equipment Corp............................... 132 Quinn Wive & Iron Works............................. 106 Railway Accessories Co....................... 134 Raymond Pulverizer Dlv of Combustion Engr Co., Inc............................................ 38 Rental Service C o .......................................... 137 Republic Rubber Co .................................... 121 'Robins Conveving Belt Co............................... 28 Rock B it Sales & Service, I n c ............................117 Roebling's Sons Co . John \ ........... 10-15 Sanerman Bros., I n c .......................... 128 Schaffer Poiomeier Co..................................... 114 Simplicity Engr. Co.......................................... I l l SKF Industries, Inc.......................................... 25 Sinldth & Co . F. L........................................ 37 Smith Co . S M o rg a n ................................... 127 Smith Engr W o rk s.......................................... 26 Smith. Inc., L. B................................................. 137 Sprout, Waldron & C o .................................... 128 Stanhope, Inc , R C............................................. 137 Stulz-Sickles Co....................................... . . . 140 Sturtetant Mill Co........... ................................ 42 Taylor Forge 4 Pipe W o rk s ........................... 110 Thew Shovel C o ............................................... b Tidewater Equip k Miehy C o rp .................. 135 Timken Roller Bearing C o ........................... 5 Traylor Engr & Mfg C o ............................. 30 Tyler Co., W S....................................................130 Union Wire Rope C o rp ............................... 24 United States Steel........................................ 19 Universal Concrete Pipe C o ................................ 104 Universal Crusher C o ........................................ 14 Walsh Co.. Richard P ...................................... 137 Warren Bros Roads C o ...................................... 106 Wellman Engr C o ........................................ 130 Western Precipitation C o rp ........................... 56 Whitcomb Locomotive C o ............................... 80 Williams Patent Crusher & Pulverizer Co . 7ft Williamsport Wire Rope C o ........... . . 16 HANDBOOK BITUMINOUS PAVING MACHINERY Bituminized Material Offers a New Outlet for Your Aggregate e T h e H & B tower type plant combines portability and large capacity. Built by manufacturers of asphalt pavins machinery for over 30 years. S en d for o u r new b u lletin T-247 HETHERINGTON & BERNER, INC. ENGINEERS-- MANUFACTURERS INDIANAPOLIS, IND. J40 Pit and Quarry QUARRY CUTS AIR HOSE COST HERE is a typical example of the savings that can be made by having air hose indi vidually specified to the job by the G.T.M.-- Goodyear Technical Man. Air hose troubles used to be a pretty regular thing in the underground operations of the Heumader Quarries Company, St. Joseph, Missouri. Constant dragging over the sharp rocks caused severe abrasion and rapid cov^jr wear. Lubricating oil passing riMg>ugh lines caused the tif^KfaMg^Uafajfajkg,Jfre quently clogging the hammers and d& the work. Several different makCfe-nl^liose were tried, but the maximum service was only one year! ^ Says " Style M" Noting these conditions carefully, the G.T.M. recommended that the quarry change to Goodyear Style M Air Drill Hose, 4-ply, and in May 1933, several lengths were put into service on the hammers. Today, over four years later, this hose is still in use and, as the photograph shows, it is far from worn out. In all this time there have been no shut downs and delays due to clogged tools, and the saving in replacements has reduced the company's air hose bill 75%. Couldn't you use savings like that? To give you similar economy on any type of job Goodyear makes five different types of air hose to fit every service requirement. The G.T.M. will be glad to recommend the proper type fo r your operation if you will write him, care of Goodyear, Akron, Ohio, or Los Angeles, California--or the nearest Goodyear Mechanical Rub ber Goods Distributor. ? pow COST v- _ . %jv _ ,*, <* r ,, *-r-_-,, ,-:sS- .^*. :T _ ^ v, ^ - . ' - t a * -* . ,5 - H * * '"i. v-- ' - i - v , i v .*W. ..,,..,-4.. ' - ' _.- -v v 3y'luJ'L3?K" ^ -T "*V`~ ry**1. f, ,, 1 -*tV* ^ ft 4r i r ^ f -L- v * ... ,K,, , - ,l ^ . ' ' -' `i ~ r ,, , - *f - J * t V 1 - c -` BEST ENGINE I EVER HAD FOR one who has used many engines, John Guerra is a man of few words. But they pack a world of meaning! "Best engine I ever had," sums up the low operating cost of his 125-hp. "Caterpillar" Diesel Engine and the way it stands up under the heavy demands of his rock-crushing plant at River Drive and Strodman Road, St. Louis, Mo. W ith an output of 350 tons per 10-hour day, his fuel-and-lubrication cost is only thirty cents an hour -- 1 l/ 6 c a ton, or less than one-fourth the usual cost of other types of power. In 20 months of service, not a cent has been spent for repairs. And there are thousands of other actual instances, covering most every industry, which offer similar proof of the extraordinary economy of Diesel power as perfected by "Caterpillar." Ask the nearest dealer for details. Or, write us direct. S E V E N E N G IN E S I Z E S - 4 4 TO 160 HP. CATERPILLAR DIESEL ENGINES TIMKEN Bits meet every need The TIMKEN Rock Bit range includes types and sizes for every drilling condition that may be encountered. TIMKEN Bits are made in three different types-- cross, rose and chisel-- available with either center or side hole in all required gauges. There is only one quality however, and that is the highest that can be produced. TIMKEN means as much in rock bits in this respect as it does in tapered roller bearings. To get this superior quality and the advantages that go with it-- including streamlined design, faster drill ing and more footage per bit-- you pay a little more for TIMKEN Bits-- but you will find them cheaper in the long run. If you are not using TIMKEN Bits you are losing a modern opportunity to reduce your drilling costs. Why not give them a tryout now? W e are ready to conduct a demonstration whenever you say the word. ROLLER BEARI Manufacturers of Timken Tapered Roller Bearings for automobiles, motor trucks, railroad cars and locomotives and all kinds of industrial machinery; Timken Alloy Steels and Carbon and Alloy Seam less Tubing; and Timken Rock Bits, * TRAD E-M AR K REG. U. S . PA T. O FF. NG COMPANY, CANTON. OHIO TIMKEN ROCK B IT S h 1937 IS tiL C L in j a a o zez clzu l io o n e x n i n j Making it so that it will stand up is anoth That's w hy [ngersoll-Rand pistons p ass th ro u g h 48 o p era tio n s ;n th e ir m a n u fa c tu re PIECE by piece the parts of a rock drill look simple and easy to make--but looks are deceiving. No other machine has to withstand the abuse of modern drills. Consider the piston of the DA-35 drifter; one end operates at a freezing temperature, the other, frequently at 250 F. It must deliver heavy blows, at the rate of about 2000 per minute (depending on conditions)--millions of these impacts during its lifetime. It receives 48 separate machining, testing and heat treating operations and is actually being worked on 55 hours in the course of its manufacture. During the last thirty years there has been a tenfold increase in drilling speed--the life span of parts has been lengthened-- dependability has grown progressively greater--upkeep costs have steadily decreased. Credit for this great improvement is due in a large measure to Ingersoll-Rand research and development. I-R PRODUCTS `coolers eron Pum ps ers os" Core D r ills C om pressors Condensers D rill S te e l & "Jack b its" E n gin es H oists Paving Breakers P neum atic Tools Receivers, Air & G as Refrigeration U nits Rock Drills Rock Drill Accessories Tie Tampers Vacuum Pum ps RBitiihiv uvw vnov nwv These numbers<o<n i enable us to deter" exact batch ol ; which it was made, as all ofthe pertinent concerning th e fo machining, heat-1* inspection and test part. REASONS WHY THE DA-35 PISTON STANDS-UP | Metallurgical specifications for each piston incorporate 60 years of accumulated ex perience. o Nseolesctteeedl faosr acnayreofuthlleyr pasurtphoesemwahteartieavletrh, aist goes in rock drill pistons. Composition is controlled with unbelievable accuracy. Each batch must pass a physical inspection, chemi cal analysis and an elaborate hardenability test before it leaves the mill. Proper heat-treating is a highly technical operation. The handling of this step in the manufacture of I-R drills is entrusted only to specially trained metallurgists. A correct design, highly skilled craftsmen and a thoroughly modern plant and equip ment insure a superior product. Sizes are held to one-half of one-thousandth of an inch (.0005'') variation. Every finished piston is tested in a specially developed magnetic testing machine, which gives what we call " a mechanical X-ray", indicating the depth of hardness and the most minute variations from specified stand ards. Each lot offinished pistons is also given an actual iunninn toqi nn Rqrro ntuM o r r i s MORE Hydraulic C olumn .MORE News of interest to .Centrifugal Pump U sers WITH 4 f G S u ii ^ WHITCOMB LOCOMOTIVES "Full of Grit" . . . . This Morris Centrifugal Pump is certainly "full of grit"-- literally as well as figuratively. The stamina which has enabled it to operate with complete satisfac tion on this difficult slurry-handling service is typical of the quality built into all Morris Pumps. Have you the Morris bulletins on pumps for your requirements? If not, be sure to write for copies. Efficiency curves should have plateaus-- not peaks . . . . i If a centrifugal pump has an efficiency curve that drops j off sharply from both sides of the maximum, the slight- i est change of pressure or capacity will cause a marked | loss of efficiency. Morris Pumps have flat efficiency curves, which means that they may be operated over a range of conditions without material decrease of effi ciency. If you want centrifugal pumps with this help ful characteristic, be sure to get a Morris Quotation. 1 Bulletins on request. F or a u th o rita tiv e re c o m m e n d a tio n on a n y p u m p in g or dredging p r o b l e m , iv r ite to M o r r is M a c h i n e W o r k s , B a id u in s v ille , .V. V. R e p re sen ta tives in P rincipal C ities i Stop fighting ground resistance, road washouts, high up-keep cost of equipment, and extra man power. Let one operator, with a Whitcomb Locomotive, haul more tonnage at one time than a whole fleet of individual haulage machines. Over half a century of experience has proven the unequalled stamina and efficiency of Whitcomb Locomotives. They give you un interrupted service for more years with lower up-keep cost. New methods make track moving or shifting faster, easier and cheaper than ever. Whitcomb Locomotives are sturdy, compact machines, properly balanced for rough, temporary tracks. They have plenty of power to move the load with speed and economy. Let our engineers survey your haulage re quirements and estimate the savings you can make with Whitcomb equipment. A SIZE AND TYPE TO SUIT YOUR NEEDS Gasoline or Diesel Mechanical Drive Gasoline or Diesel Electric Drive Electric Storage Battery Electric Trolley Combination Trolley -- Storage Battery THE WHITCOMB LOCOMOTIVE COMPANY P la n t a t R ochelle, Illinois S ubsidiary of The B aldw in locom otive W orks A ll sa le s m a d e b y The B aldw in Locom otive W orks, P a sc h a ll S tation P ost Office, P h ila d elp h ia, P en n sy lv an ia. Jlecuuf jbuMfi Bodiei for BocJz and A ycyietj& ieA , W and T44 TELESCOPIC HOISTS with PATENTED OUTSIDE MOUNTINGS # 20 eu. yd. side dump body, and Model T44 tele scopic hoist The body weighs ap proximately 14,000 lbs. A GARDNER-DENVER AIR COMPRESSOR An improved, accurately balanced compressor suit able for a wide variety of services. Made in all commercial sizes. Rugged--built for heavy-duty, full-load service and continuous operation. Low power costs . . . electro pneumatic control auto matically controls current consumption in accord ance with air demand. Timken Tapered Adjustable Roller Bearings. Write for bulletin giving full details H orizontal A i r Corn - ^ pressor B in c e . 1 8 5 9 GARDNER-DENVER COMPANY Quincy, Illinois GARDRER-DEIIVER 123