Tractor Manufacturer Reduces "Noise Pollution"
At a time when the American
public is showing increased
awareness of man and his ev
nironment, tractor manufac
turers have taken it upon
themselves to reduce noise at the
operation’s station.
ROHRER'S
QUALITY SEEDS FOR
FARM AND GARDEN
- Cert. Iroquois Alfalfa - Timothy
- Cert. Saranac Alfalfa . Brome Grass
- Cert. Buffalo Alfalfa - Pennmead Orchard
- Cert. Cayuga Alfalfa Grass
■ Cert. Vernal Alfalfa - Reeds Canary Grass
- Cert. Pennscott Red * Ky. Blue Grass
Clover . Crown Vetch
- Cert. Ladino Clover - Pasture Mixtures
- Cert. Amosy Soybeans - Wayne Soybeans
- Wabash Soybeans
DEKALB CORN SUDAX
CERT. MAINE GROWN SEED POTATOES
GARDEN SEEDS ONION SETS
LAWN GRASSES
Store Hours: 7 A.M. - 6 P.M., Sat. to 5 P.M.
SMOKETOWN, PA. PHONE 397-3539
Ue * 2300 SERIES
11 TANDEM DISC HARROWS
TOUGH, FAST CUTTERS IN 9' TO 21' WORKING WIDTHS
Fold-up models—ls', 17', 19' and 21'-have positive, self locking
wedge to hold gangs in working position Fold up is fast and
no wrenches are required
N. G. Myers & Son Roy H. Buch, Inc.
Rheems, Pa. Ephrata, R. D. 2
Nissley Farm Service Grumelli Farm Service
Washington Boro. Pa. Quarryville, Pa.
Latest hard evidence of their
success is the new line of In
ternational Harvester tractors
which have recorded the lowest
noise level and quietest cab ever
tested. These recent tests record
as low as 85.5 dB(A) in IH’s new
V « " -«.v >- *•**■
vS?KSS*3SK3®®S®
ALLIS-CHALMERS
Custom blade spacing lets you match harrow to soil conditions
Fine cut—7s4" front, 754" rear
Medium cut—Bs4" front, 754" rear
Tough cut—Bs4" front, 854" rear.
Choice of 18", 20" and 22" blada diamatars to match your
discing needs.
Choice of 10, 8 and 7-gauga blade thicknesses gives you the
strength you need for your soil conditions
Back-up plates on alt blades provide extra strength near the spool
to combat breakage and rock damage while leaving razor sharp
edges for cutting
Outer gang blades are 2" less in diameter than other blades to
leave a level, finished field surface
Adjustable gangs are simple to move to the discing angle you need
for a smooth, level seedbed in any soil
Heavy weight per blade-approximately 75 lbs—helps harrow
penetrate deep and cut clean
Heavy-duty bearing brackets soak up shock last for years
under normal conditions
Parallel lift gives you the ground clearance you need to transport
a wide disc harrow
cab with the tractor at full load.
In some cases, the current model
tractor with new cab has resulted
in as much as 40 to 50 per cent
reduction in subjective loudness
at the operator’s station.
This is quite an achievement
when you consider the variety of
noise sources in a tractor and the
interaction of one on the others.
Designing an acoustically quiet
tractor cab is in many respects as
difficult as designing an
acoustically perfect auditorium.
Both require a combination of
science and art. Such a com
bination went into the sound
engineering program for IH’s 66
series cab. Completely supported
4-H Calendar
Monday, April 3
6 p.m. Mount Joy 4-H Sewing
and Knitting Club,
reorganization meeting, St.
Mark’s Methodist Church,
Mount Joy.
7:30 p.m. Mount Joy 4-H
Cooking Club reorganization
meeting, St. Mark’s Methodist
Church, Mount Joy.
4-H Teen Leadership Conference,
Washington, D.C., April 3 - 7.
Wednesday, April 5
7:30 p.m. Red Rose 4-H Baby
Beef and Lamb Club meeting,
Farm and Home Center.
Friday, April 7
7:30 p.m. Pemi Manor 4-H
Community Club
reorganization meeting, Ann
Letort School.
L. H. Brubaker
Lancaster, Pa.
/J
Lancaster Farming, Saturday, April 1,1972
at the corners by “Isomount”
isolators to intercept transmitted
vibrations, the cab also in
corporates the latest interior
materials for damping, ob
structing, and absorbing noise.
Polyurethane foam, and dense
contour molded rubber blanket
material were used for interior
upholstery along with rubber
mounted glass windows and
spray-on acrylics with several
times the damping efficiency of
auto undercoat to obtain a truly
significant reduction of sound
and resultant operator fatigue.
And tight gasketing around
doors, foot pedals, and control
console reduce exposure to air
borne noise.
Actually, the industry’s efforts
to deaden tractor sounds were
given a momentary setback
several years ago, when cabs
became popular. Early cabs
usually raised the noise level at
the operator station and the in
troduction of protective cabs
compounded the engineering
problems of reducing sound
levels. IH engineers, therefore,
There's a better way
to get her to produce...
PURINA MILK CHOW
You’re not going to get any more milk out of that cow if
she doesn’t have it in her. But your cows may have the
bred-in capacity to produce an extra ton of milk a year—
with the proper diet.
That proper diet is Purina Milk Chow Special. It's a high
efficiency milking ration that contains carefully selected
ingredients blended together in the right amounts to help
your cows produce all that’s in them.
Start feeding your dairy cows Purina Milk Chow Special
and keep an eye on your records. Prove to yourself that
this high efficiency ration can return you lots of milk at
remarkably low cost. In fact, many local dairymen report
increases of over 2,000 lbs. milk per cow m their first
year on Milk Chow Special.
Stop in and see us today. We’ll give you the details on
prices and delivery. You'll find us at the store with the
Checkerboard Sign.
John J. Hess, 11,
Ph: 442-4632
Paradise
West Willow
Farmers Assn., Inc.
Ph: 464-3431
West Willow
John B. Kurtz
Ph: 354-9251
R. D. 3, Ephfata
attacked the noise and protection
factors as one.
First efforts to solve the
problem were aimed at the high
noise peaks. Double-pass muf
flers replaced single-pass to take
care of perhaps the most obvious
noise source—exhaust.
From this beginning, an in
creasingly more scientific ap
proach to reduce the noise
evolved for application to the new
IH tractors. Simulating actual
operating conditions, the
engineers used magnetic
vibrators to feed sound inducting
vibrations from the source to the
cab structure and, with ac
celerometers, traced the flow
paths through it to their
respective sounding boards.
In this manner, a bare safety
frame and then a complete cab
were force vibrated and analyzed
in the laboratory as a basis for
instituting measures to interrupt
flow paths or to deaden sounding
boards. These developments
were then further verified in the
field with tractors under severe
working conditions.
IT'S CALLED
SPECIAL
Ira B. Landis
Ph: 394-7912
1912 Creek Hill Rd., Lane.
Inc.
James High & Sons
Ph: 354-0301
Gordonvilie
Wenger's Feed Mill
' '/
Inc.
Ph: 367-1195
Rheems
15