The Morning Tulsa daily world. [volume] (Tulsa, Okla.) 1919-1927, 1922-01-15
R.C. Mott Firm Extends
Scope ofSales Agency
OrOldsmObiles--Hups

haps be worked up into "A finished
part later.
Among tho unusual and unique
machines In operation ~ the Oldsmo-
bile engine department are several
that stand out very prominently.
such as the cylinder bore rolling
machines, the 77-spindle Away
drilling machine, and the crank
SHAFT balancing machine.
1t has long been recognized that
I'm motor building some means should
be devised which would insure "a
finished cylinder bore being nor
f'ctly round from end TO end. and
which would insure q surface harder
than that obtained by open maChin-
iug or grinding. the processes used
heretofore. II remained for Oldsmo-
bile engineers 10 obtain the desired
results by the ingenious method Of
rolling" the bores A central sptudI,
is surrounded by rolls which some
what resemble roller bearings Each
B roll Is carefully measured with mi
cromctcrs 40 that the whole forms
a true circle. This is made to tho
true size uf tho desired cylinder bore
and a previous machining operation
on the cylinder wall allows from one
halt to threc-tourth of thousaudth
metal on the diameter to be com.
pl'H0tu ny IhlllUk. Ne roll WOl'n
works In graphite and oil against
the cylinder wall, comprcsscs the
I metal 10y Crowdiug II back under
| expansion and gives II hardness
/ and polished smoothncss which is
/ unubtainablC by any other means or
/ method. The result Is a true bore
and longer life to cylinder walls
In the nine months since its in
/ PRODUCTION, the model ~ engine has
/ become known from coast to coas,
as quiet. vibrationless mechanism
/ a stock engine on block test at tho
/ General Motors laboratories Mt Day,
ton was turned up 10 1900 rovolu.
/ tions per minute with no vibration
/ This remarkable result is due to per.
feet design Of rcciprocatug parts
| to precision and care in machininl
the crank shaft and the balancinp
OF this important part before 1t /.
assembled into the engine.
The crank shaft balancing ma.
/ chine is one OF the most wonderful
. pieces Of machinery among the MANY
examples OF ultra modern equip
ment found I'm the plant II was do
signed and manufactured special,
for the Dlds Motor wo ks and L.
known as a dynamic balancing ap
paratus.'
- Al'huu'u III NfNtllDllOf
or the new Hupmob.le are.
The working parts OF the moto
are PROTECTED from dirt and mud h,
a two-plece shield. with scction
along the sides of the motor below
the frame and across the front. III,
advantages Of this construction ar,
extreme motor accessibility an,
more efficient cooling. The cngin
has three-point suspension
The cylinder block has an extri
large water space, especially aroun,
the valves. The cylinders are groun,
on an internal grinder, n process
more expensive but giving mucl
more satisfactory results than ream
ing. This process is used only 4
the manufacture of high priced car
and in the Hupmobile.
The combustion chamber IL OF
J special, improved shapc VIII ch give
large mixture volume over tn
t valves. This construction has bee
carefully worked out to take tull ad
vantage OF the inlet gas turbulenc,
vi gives power and efficienc
= hitherto obtained only with con
, plicated multiple valve systems.
{ v. c. Mott has this week been
. visitor at the New York automohil
/ 'how. His agency will display NV
. Oldsmohiles and three HupmobilC
= at the Tulsa show.