We l de d Cases Siraightened By Use of Wheel Press
M otor cases distorted by arc welding aro forced back to sliape in a 200-ton wlieel press in the c e n tra l sliops of th e New R iver Co., M ount Hope, W. Va. I t has been determ ined th a t m axim um shortening of distance between diam etrically opposite fram e bolt holes am ounts to } in. on the field fram es of th e MH-110 motors of 13-ton locomotives. Before adopting the wheel-press practice about a year ago th e fram es w ere forced back to approxim ate shape by p u llin g the clam ping bolts tig h t.
b u t even tlien the fram e pole pieces had to be m achined to an u n satisfacto ry de- gree to restore them to a tr u e cirele.
The shortening of a surface by shrinkage a fte r applying a fili or build-up by aro welding is now common knowledge. Many years ago th is principle was ntilized a t tim es in th is same shop to straig h ten bent locomotive axles. A bead or series of beads were arc welded along th e hig h side to slirink th a t side an d b ring th e axle back to stra ig h t. T u rn in g off the bead to restore th e finish to th e axle had 110 appreciabte
dim inisliing eflect, tlius indicating th a t the reason for shrinkage lay in the h eating to fusion p o in t and subseąuent cooling ra th e r th a n in the building up of th e surface.
As is the usual practice a t other shops, th e fram e halves are tig h tly bolted to- gether and tucked by arc weld before the building up o f th e axle box and b earing head fits is begun. The diflferences in metliod as practiced in some o th er shops is th a t the w elding is done more rap id ly and w ithout the expense of liand peening of each sm ali section of weld a fte r i t is ap- plied. F urtherm ore, tlie fram es are not clamped onto m andrels durin g th e welding nor d u rin g m achining. The accom panying illu stratio n shows an MH-110 fram e set up 011 th e tab le of a horizontal boring m ili ready for rem achining the filled axle bear
ing and housing fits.
W hen tw o lialves of a fram e are unbolted and c u t a p a r t a fte r filling they sp rin g to a d isto rted position, indicated by th e fact th a t the fit surfaees a re no longer p arallel b u t instead g ap a t the inside. Procedure in the wheel press is to force th e ram ag a in st th e fiat outside corner of the lower h alf of th e fram e w ith sufficient pressure
to b rin g its diam etrically opposite clam p
ing fit surfaees to conform ation to a s tra ig h t edge placed across th e two. Then its clam ping bolt-liole-centers distance is carefully m easured and the second o p era
tion is to press the other h alf of the fram e u n til its hole-centers distance is inćreased to equal t h a t of th e bottom half. Seyenty- five tons w as th e m axim um pressure re- quired to stra ig h te n tlie halves of th e field fram e which is shown set up for m achining.
♦
Taking Machines Through Belt Done in Twenty-One Minutes
As cost is now the chief issue in m ining, and as steady m achinę o peration lowers cost, th e supervisor’s job in a mechanical mine is playing clieckers w ith “Mr. Tim e,”
w rites Ben Sweazy, Crooksville, Ohio, in describing a metliod of moving m ining and loading equipm ent through a b e lt line w ith o u t in te rru p tin g coal production.
And the supervisor m u st take the first inove and every move th e re a fte r to win.
W ith only fo u r men, i t is possible to tak e a Joy 8BU loader, Jeffrey 35B cu tter, two Jeftrey 61 AM pan u n its an d other tools through a b elt line in 21 m inutes in cases w here i t is impossible o r too fa r to go around. In fact, th is operation, when perform ed d u rin g a lunch period a t the Jones all-m echanical m ine, Zanesville, Ohio ( Coal Age, May, 1937, p. 187), re- quired j u s t t h a t tim e, rep o rts Mr.
Sweazy, who also asknowledges h is in- debtedness to E. M. Rife, whose views on the supervisor’s ta s k a re expressed in the first p arag rap h , for cooperation in the developm ent and application of the metliod.
Tools and eąuipm ent reąu ired in the operation eonsist of tw o Crescent wrenches, ham m er, d r if t pin, eig h t p an bolts w ith nuts, tw o 1-in. boards 10 ft. long, liftin g jack, two 3 x 5s ju s t long enough to reach from the top of th e b elt pan to the roof, and two 1-in. boards 30 in. in length. All these m a te ria ls should be in place a t the point where th e belt line is to be broken.
When the conveyor is stopped, two men lift the b elt high enough to elear th e Joy loader an d then prop i t w ith the 3 X 5s, which are topped by the 30-in.-long boards.
If th e belt is too heavy o r too tig h t, the
By separate treałm ent each half of the fram e has been pressed back to normal before rebolting for m achining
83 COAL AGE — Yol.43, No.5
At Cincinnati, be sure to
V l S l T B O O T H 8 0 6
H a z a r d W i r e s a n d C a b l e s for the M i n ing Industry will include, a m o n g others, B o r e H o l e C a b l e , A r m o r t i t e P o w e r C a b l e , M i n i n g M a c h i n ę C a b l e a n d
S H O T F J / ( I N C C O R D
( T y p e D )
w i t h a d i s t i n c t i v e o r a n g e b r a i d , a b r i g h t c o l o r t h a t m a k e s t h i s c o r d p a r t i c u l a r l y d i s t i n g u i s h a b l e w h e n
I y i n g 011 t h e f l o o r o r g r o u n d . B e i n g s o e a s i l y s e e n , it e s c a p e s m u c h u n i n t e n t i o n a l r o n g h u s a g e . B u t it a ls o p r o t e c t s i t s e l f b y h a v i n g a n i n s u l a t i o n w i t h a t e n s ile s t r e n g t h o f m o r e t h a n a t o n p e r s q u a r e i n c h . T h e t o u g h , f r e e - s t r i p p i n g r u b b e r i n s u l a t i o n a d e - q u a t e l y i n s u l a t e s th e c o n d u c t o r s e v e n w h e n I y i n g
i n w a te r . T h i s c o r d i s s u p p l i e d i n 1 0 0 fe e t l e n g t h s f o r y o u r c o n v e n ie n c e .
H A Z A R D I N S U L A T E D W I R E W O R K S
D I V I S I O N O F
W I I K E S - S A R R E
T H E O K O N I T E C O
P E N N S Y l Y A K i A
May, 1938 — COAL AGE 89
O P E R A T I N G I D E A S fro m P R O D U C T IO N , E L E C T R IC A L and M E C H A N I C A L M E N
LOST TIME ACCIDENTS liftin g jack is used. W ith th e belt raised a t both cuds of the pan to be rcmoved, tlie n u ts on the pan bolts aro removed and the bolts are tapped o u t w ith the ham m er and d rift pin. The pan then is removed to one side to elear the road.
The two lO-ft.-long boards then are placed across the belt on the same gage as the C aterpillar tre a d s on th e loader, which is taken through. The loader is followed by the c u ttin g machinę w ith one pan u n it on the c u tte r b ar and the other dragged by th e c u tte r by m cans of a piece of old crab ropo attaclied to the b ar. The blower fan, d rill and all tools can be loaded in the p an u n its, along w ith the tailsto ck s for the pan line. As soon as th e eąuipm ent is p a s t th e belt line, the pan is replaeed a n d coupled up w ith the eight pan bolts. Then the belt is dropped to complete the job.
Bulletin Boards Promote Safety A t Alabama Fuel & Iron
B ulletin boards such as th e one illu s tra te d are a m a te ria ł help in the safety w ork carricd on by the A labam a Fuel & Iro n Co., B irm ingham , a t its vari- ous operations. W hen a n in ju ry oecurs, a red lig h t is placed beside th e namc of the foreman as well as beside th e nam c of the m an in his force d irectly responsible. A w hite lig h t is carried beside tlie naines of foremen who have h ad no in ju ries in th eir mines o r d ep artm en ts over a six-m onths’
period.
U nder the A labam a F uel & Iro n system, a rew ard of one day’s pay is given each w orker in a mine w hich operates 180 days w ithout a lost-tim c in ju ry . The num ber of in ju ries h as dropped m a te ria lly sińce tlie rew ard and bulletin-board system was installed. Children in th e schools are reąuired to answ er one ąuestion on safety daily and, as they u su ally have to consult th e ir fatliers for the correct answ ers, crea- tion of a safety consciousness is facilitatcd.
Women also stu d y 111 classes sponsored by the U. S. B nreau of Mines.
O n t o C i n c y !
M a y 2 marks the b e g in n in g of the annual A m e rica n M in in g C o n g re ss convention and exhibit of coal-m ining equip m ent at łh e M u sie H all in C in cinnati, O h io . N o operating, electri- cal, m echanical o r safety man should m iss it, as there are few occasions when as m any ideas for efficient mine operation are available in one place.
But when you get back to the mine, the O p e ra tin g Id eas dep artm ent of C o a l A g e still will be on the job sift- in g the experience of men throughout the country for your benefit. Perhaps you, yourself, have worked out some- thing that has saved you time, trouble or m oney or has m ade your mine a safer place to work. If you have, here is the place to pass it on so that others
m ay profit by your experience. So
send in this idea, a lon g with a sketch o r p h o to g ra p h if it will help to make it clearer. If acceptable, it will bring you $5 o r m ore from C o a l A g e , as well as our sincere appreciation.
Pumping C o s t C u t 60 Per C en t By Drilling Borehole
D rillin g a borehole a num ber of years ago a t tlie No. 6 m ine of the C entral E lkhorn Coal Co., E still, K y., c u t pum ping cost n early 60 per cent, reports E . A.
Sm ith, chief engineer. The problem was cith er to p u t down a borehole from the surface a t a p o in t 900 ft. from th e pump o r force th e w ater to a d rift 2,200 ft.
away. Froduction w as to be 250 g.p.m., an d 3-in. lines were to be considered in th e prclim inary calculations in both cascs, w ith th e borehole to be fitted w ith such a large casing as to give very little friction w ith th e sm ali volume of flow.
F rictio n head on tlie 3-in. line a t 250 g.p.m. was estim ated a t 7.7(5 lb. per 100 ft.
of length, o r a to ta l of 69.84 lb. per sąuare incli for the distance from th e pump to
A ttra ctive bulletin boards help make safety-m inded men.
the borehole. Adding 51.11 11). for the vcrtical colunm of 118 ft., a to ta l pressure of 110.95 lb. ag a in st th e pump w as esti- m ated. U sing tlie sam e figurę per 100 ft. of line, it w as estim ated th a t friction in pum ping 2,200 ft. to tlie d rift w as 170.72 lb. A dding 6 lb. for a rise of 14 ft. gave a to ta l of 176.72 lb. per sąuare inch. By subtraction, th e difTerence in favor of the borehole is scen to be 65.77 lb. Thus, it would have cost n early 60 per cent more to pitmp the same volumc to tlie d rift, as compared w ith up the borehole. The esti
m ated saving in power alone w as $5.40 per day, or $1,994 per year. Conseąuently, the borehole w as drilled and i t is estim ated (b a t i t paid back its cost several tim es
111 tlie first year.
V
C ab l e Splice lmprovised With Brass Tubing
“There are tim es when i t is not possible to find th e rig h t m an a t th e rig h t tim e to splice a w ire rope, as i t is a ta s k th a t rcąu ires a background of esperience if a good, serviceable job is to re su lt,” points o u t C harles H. W illey, Penacook, N. H.
“ B u t if tlie cable is one w hich does not have to ru n over a slieave or th ro u g h a .błock, all th a t is necessary is a mecliani- cal m cans of joining the two ends. There are m any w ays of doing this, in addition to clam ps ready m ade for the task, but in th e accom panying skctches I cali
at-A rw il
s o ld e r
M e t h o d of using brass tu b in g to splice wire ropes
tcntioii to a different method of m aking a strong, useful and n e a t splice.
“As th e first step, select a sh o rt piece of brass tu b in g t h a t w ill fit the rope.
Then m ake a rubber pług about 1 111. in length and tw o steel plugs— one long and
COAL AGE — Vol.43, No.5
[fn
Uli
uLonq Steel
Pług
S h o r t S te e l P łu g
S i r i k e h e a v y bf ow o n p łu g
to b u lg e r u b b e r a n d iu b e
STA N D A R D O IL CO M PA N Y ’S
N e w
ST.WOII
S o lv e s g u n u n in g tr o u b le s o n a c o m p r e s s o r
StanOIL, one of the greatest recent de- velopments in industrial lubricants, has already demonstrated its trouble-saving, cost-reducing qualities on hundreds of applications.
At one refrigerator manufacturing plant gummy deposits were sticking the unloader on a compressor. After numer- ous other lubricants had failed to give relief, Stanoil No. 25 completely elimi- nated the trouble.
Again, Stanoil No. 18 on an elevating conveyor improved operation in cold weather and materially reduced power consumption.
Crank bearings on a smali steam en- gine in the power plant of a milling company were being replaced every two weeks. Stanoil No. 25 was placed in this engine over a year ago and no bearings have needed replacing sińce then.
Made in seven grades for a wide rangę of applications, Stanoils make good lubrication possible on the most difficult jobs and proyide low-cost lubrication wherever highly refined and highly stable oils are needed.
Ask a Standard Lubrication Engineer to point out operations in your plant which could be better lubricated, at less cost, with Stanoils. Cali him at your Iocal Standard Oil (Indiana) office or write 910 So. Michigan Avenue, Chicago, 111.
Copr. 1938. Standard Oli Co.
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otber.
“W hen tiie leg? Ł are iieen piaced •where th«T belocg th e r sBoiild be cleated '«riti SOd iiaDs to th e a d ja c e n t tim b e ri a iie r plum bing. -sritł] ih e cieats a trifle h ig ie r th a n th e tro lle r. W ire an d cleats are a definite help a s a m eans o i tem porarily r«rsting th e I-beam w hile i t is being placed in position. As m ost of th e w ork w as done w hile th e m ine w as in operation, th e hot- w ire dar:ger w as elim inated by nsing a trolley-w ire sleere m ade o u t of th ree piecem rjf pine board about 4 ft. long. a s indicate<1 in Fig. 2. A 4-in.-wide b oard beiween and a t one edge o f tw o 10-in.-wide boards makes the sleere, which fits snugly over the tro lle r w ire to elim inate the possibility o f shoek. E re n a ll-s a f e tr shoes reąuire an additional safeguard.
“Each beam should be, and was.
side-n COAL AGE — Vol.43, No.5
B u i l t F o r C o a l P r o d w c t t o s i
T h e L o u i s A l l i s S P L A S H - P R O O F m o t o r h a s b e e n d e s i g n e d a n d
b u i l t f r o m t h e g r o u n d u p i n e v e r y d e t a i l t o d e l i v e r a b s o l u t e l y
d e p e n d a b l e p e r f o r m a n c e o n y o u r v e r y t o u g h e s t c o a l m i n e j o b s .
P r o t e c t e d f r o m e v e r y a n g l e a g a i n s t t h e m o s t s e v e r e o p e r a t i n g c o n d i t i o n s b y i t s s m o o t h h e a y y s o l i d c a s t - i r o n h o u s i n g s p e c i a l b e a r i n g c h a m b e r g u a r d — s c i e n t i f i c a l l y d e s i g n e d w a t e r b a f f l e s a n d t r a p s i n t h e a i r p a s s a g e s — a n d a p r o t e c t i v e c o m p o s i t i o n c o a t i n g o n t h e w i n d i n g s — T H I S m o t o r u n q u e s t i o n a b l y a s s u r e s t h e c o a l m i n e o p e r a t o r o f u n i n t e r r u p t e d m o t o r o p e r a t i o n u n d e r . j n o s t s e y e r e c o n d i t i o n s . T h e s e m o t o r s a r e a y a i l a b l e i n b o t h D . C a n d A . C . - a S I Z E a n d T Y P E f o r e v e r y j o b — f r o m t h e c o a l f a c e t o t h e t i p p l e .
Writefor c o p y o f o u r 6 0 p a g e illustrated c a ta lo g N o . 7 0 0 w hich f u lly d c s c r ib c s e om plete lin e o f m o to rs for c o a l m in e o peration also c o n tain s Y alu ab le ensineering a n d m ain te n an ce data, o n p r a c t i c a l l y every t y p e m otor.
S P E C I A L D. C . M I N E M O T O R This direct current motor has been especially d e - signed f o r g e n e r a ł all- around m in e u s e . The d rip -p ro o f e n d b r a c k e t and covered commutator perm its p ro p e r ventilation and also protects against d rip p in g w a te r o r falling pa rtic le s.A sk for eomplete
• details o f s p e c i a l m in e motor (T y p e G N A ) and t h e y w illb e sentprom ptly.
E X F L O S IO N - P R O O F For gaseous mines, write lor eomplete In f o r m a t io n on our A .C . a n d D .C . ex- plosion-proof motors, that are available in a wide rangę ofelectrical charac- teristics to meet e v e r y mine operating condition.
O P E R A T I N G I D E A S fro m P R O D U C T IO N , E L E C T R IC A L and M E C H A N I C A L M E N
H !11 i
.■ h " x 2 " x s f r a p m o n
6"
Details of guard-rait clam p Fig. <1— Typieal example of w alling between
legs and installing auxiliary binders
braced a t th e ends as soon as the in stalla- tion was completed. Any kind of solid tim ber as wide as th e web of th e I-beam i s effective. The bark first sliould be re- moved and then th e ends of th e braces should be c u t on a slig h t pitch so th a t they can be driven tig h tly into place.
“ In p a rts of th e m ine th e roof w as so badly d isintegrated th a t a place th e size of one’s head yielded a seemingly .inter- minable flow which would fili the entire heading before i t could be ohecked. In siieh places, the I-beam s were set on 3-ft.
centers. Seven-foot w hite-oak props were
centers. Seven-foot w hite-oak props were