Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1892-06-01

Sill running SATISFACTORILY AMI nave never
been oiled. To les, the durability of the
material as step bearing when exposed 10
water and under heavy pressure. vertical
shaft exer,ing Il pressure of 500 lbs. was run
al 40 reys. per min. The lower end Of the
shaft was an obtase angled cone > ms. in
diameter. After three n,onths' running the
tool marks were not all worn cut. nor was
any detrimental effect observable from sub
mersion or abrasion
The Philadelphia Traction Co. has used
the fiber graphite bearings since April. 1891.
in the tension pit at the Samson ST. power
house of their cable railway, and since Sep
fember last has had them in use on the cable
carving sheaSes in the street condnits.
The chief engineer, Mr.. j. ;, Ely. stated
ON Jan, i3 that the tension pit bearings ran
cold and we're in firsi-elass condition. The
conduit pulley bearings. although sub
merged In water part of the time, were as
good as when first put in.
Under high velocities the bearings have
been used for the spindles of textile ma
chinery making 5000 TO la,0oo revs. per
min. for nine months, and showed no wear
on either bearings or spindles, The great
EST heat developed at any time was but
little above that of the hand. In Il
Lewiston, Maine mill McMullcn
spindle in a tiber-graphite bushing
was run for Ii weeks at 5000 reYs. per
minute, and every morning new driving
cord was stretched upon i, as tightly as
strong man could draw it, AZ the end of
that time follower was pushed into the
bushing which fitted il when new, aud no
wear could be diseerned. The oyerseer of
the spinning departments; also stated that the
spindle ran with less heat than similar
spindles running in oiled bearings, indi-
eating that the friction of the tiher-graphite
bearing was less
This fact has also been proved by series
of tests made by three persons at different
times and places to determine the relative
power required To drive the Rabbeth spindle
fitted with fiber-graphite bearings and with
ordinary metal bearings which were sup
piled with the best grade of spindle oil
The total number of tests was l2S. The
power was measured by the Emerson power
scale upon the drum shaft which directly
drives the spindles The tests showed an
average saving of power of - per cent. by
the use of the tiber-graphite bearings. The
lowest percentage of saving in the tests was
Il per cent.
SO much for the record made hy this ma
terial in actual service. Experiments with
il have further shown that il is not affected
by water, oils, acids alkalies, or by mod
crate degree of heat. II does not notice
ably expand and contract with changes of
1t is also claimed that shafts
in these bearings show hardly a
sign of wear, and that the accurate and
smooth finish of the shaft which is essential
to the satisfactory running of high speed
with metal bearings is not nee
essary with iiber-graphitc bearings. When
IA new shaft is set running in a fiber graphite
bearing it at once wears away enough ma
tcrial from the bearing TO till all the cavities
and irregularities of the shaft, and takes on
q flm-like coating of the graphite. There
after the motion takes place between
graphite surfaces, and the metal of the
shaft itself is protected from wear. In
proof of this two bearings were applied to
u shaft which had given serious trouble
from heating, and the journals had become
rough in consequence. Seven months
aftcrwarl an examination showed the jour
nals still rough but very highly polished
while the bearings wcrc in AS good condl-
ton as when put in,
Another remarkable quality Of the fibre
graphite bearing is that the friction at start
ing is about the same as when in motion.
This is youehed for by the Franklin lnsti-
tute committee which reported ON this in
ventiun. Why this should be SO, provided
the other claims for the material are well
is not difficult TO see. When
q well-o'led bearing is in motion the
rubbing surfaces are separated by n
film of oil: when motion ceases the oil
oei"een p"'' VI 'i,ese sur iaees is squeeze"
ou. '''' '..I n'e''i =, s"t S"''' 'o'"us !"
I, ,o'i'ae' "i''' 'he '''e.'' Vi 'he "e"ii"s' "e"
'"e 'n"i' ''S S"H ~ '"'p "B'," SUM- ,',''
ieq"lreu " e',sulo"'e ''e o'' 'nor""ghis oe-
."e'u ' W., s''.'ns s"iia,,' ", 'n ''' ~"
,esia. iu", ,i,'''on' "n..' ''' 'ip'i si"p''e
o,'i ''s .i''N' Wv '',',es III eo'''a'' al.
"i"" ~ '''' II "'''' "i''''' III '''o'''' Vi ~
w, ,... ,-..-,
No' 'nt o"N' y, VI, t,'n'"s', .'",,"e"
aoi a 'ne noei g''p''i'e oe"'ines u '''a' uien
'"'' Va y, az ''io'' ''''',, '"", W Nv
".'''"iH :" '"V''' ue'' vi 'o"i, H.
', oopel' =" ,,''' 50 ": re-, s"S' 'h'' '"e
eApe,ieh,s mus tsi ,''u Il" ,''''r ',anulac- ,,
" n"' NV o'suiS P'o''' II, ma
''i'''i' "es'' al. al. o"'"p an. o"'"'"ap'e At,
any "e'',e' i"''''"S "''' '', P'''v.s VI
'' II '''"P'e anu eAp""''''"'
''y ~, .-.--. = .,..-,.-..-.- IT.,
,e" o,', '"'H' 10; 10 '"v app,ea,'ons "i'ieu
H. ,,arsar,,,,oa, ,,h;o,, ara r,,,r,.'I -,
''t P'i 'n'h'en "hic" are fePoi'e" I" us
are fair representations of its future capa-
biltips tho uu,uhcr and variety of uscs Ia
i;, :. -. -, -
ny 1t ",iy We pun II MAJ 'e'"us t"hInR
up hrst only those uses Tor winch IT has
been actually tested the hearings of spiudIrs
J., I'll. ,1aaI,.r,,.,. -, .7.. ,.,.
heid Tor 1t. lhere are about l'J,Ooo,obn
sDin,llps in England and America The
- e onnn =, i, nnn ...,.. -.
spe'is VI 'VV' I" i-'v'" '.'o'u'i"nH at
which they are run makes lubrlcatiOn n
most iuuortant matter. in fact tho snend.
=, ILL - .,,, H., ., ,I ~ -.
u, winch t1eS can ne run ana 'he amount
OF work which can be accomplished depend
largely unou the narfection of the lubrisn-
80; Is,t,a at,o .,t;,, tau;..,,. m :.
''""' a. u,e i'"'i i"P"i'e "V"'H'eS WIN it
1uce the friction % per cent, II IL possible
e ..':.,.I,,, T.. -
VI sPihiies hiag pt hihue'
Another application of the material is for
brushes on eIec,rir dyp.rnos
Ir ,,..
'icit Roou iu"iie"tioh II cohpiheu WIN
ample Conductivlty, and the material has
,hornurbly pro,ad II. ,..J ,,,.l;t;as l,.
many i'ohti's service On po'h are ann III
candescent dynamos.
4 still more novel aunlication ia for tho
,,a1I, -;,,e,, ,'s ~; f,;ia' s~1 a. -
nf this Mr. John II Cooner savs
'..r,'', sa,,,l ,,,,.,-,o,,,.., - .,,s ,,
eaaa"u g,in i. duo largely 10 tha ne, 81 Of con".r