As far as
what stops them. It's the brakes.
Of course the earliest carriage
or coach brakes consisted of nothing more than a chain which was wrapped around the
spokes to lock and skew the wheel downhill.
Modern automobile brakes are a far cry from the original wagon chains.
But in order to see Holland why the brakes stop a modern car and how they work.
Let's look farther into them and see what happens when we step on the brake pedal.
The leverage of the brake pedal lever makes it possible to apply a great deal of
pressure to the braking system with only a light foot pressure in the most advanced
designs the brake pedal is connected to the frame of the car strong safely anchored
and free from engine vibration all brake pedals work practically the same way the
most important part of a good braking system is the brake itself.
That's what really stops them. Let's look inside this break.
The size of the brake drum is mighty important.
It must be why the large in diameter.
So
that there will be the most possible surface for the brake lining to contact Chevrolet
engineers found out that are.
Nourish steel brake drums were often scorched by the heat from the friction between
the lining of the drum solos they developed a special heat resisting steel from
which those brake drum is made.
Thousands of different combinations of brake drum
and brake lining materials were tested until they found the one
that they knew would wear the longest
and hold up though the composition of the lining is very important.
When the foot pedal is pushed down this little Cam turns like this.
It pushes the brakes used outward and against the drum.
And here is a very interesting point about this break.
Two links which swing from a stationary point have their algorithms connected to
these far ends of the brake shoes because these far ends of the brake shoes can
swing free the force from the cam pushes the brake using Glenning against the brake
drum with equal pressure all around.
That's what really stops the car pool gripping service all around in addition this
design makes the linings wear evenly
and there is greatly to their life because the two links make the brake shoes self
adjusting in full contact with the brake drum under all operating conditions.
Whenever you step on the brake pedal the efficiency of a brick is always decreased.
If so then dirt mud and rain get between the lining
and the brake drum solo another mighty important part of the brake drum.
Is this language
that protects the lining from where this flange forms a little gutter in which
water and dirt are collected
when they enter at the top of the drum the modern water are carried around to the
bottom side where they run out in this matter the brake drum
and lining are kept clean and dry. So the seal ensures smooth then the.
Fish and operation in all weather.
For a long life
and dependability all operating parts must be played with either is the chromium
or cadmium such materials keep rust from weakening the brakes these brakes
are the finest You can get.
The action of both the pedal
and the drum must be mechanical regardless of what's used to connect them.
Brake controls are very important although too much emphasis is often put on the
subject at the expense of all that is most important. The size and crank.
And mechanical dependability of the brake itself.
The connections between the brake pedal and the brake drums must be strong
and absolutely dependable.
They must be flexible enough to absorb road shocks without getting out of shape yet
they must have solid straight.
Brakes are always most important in an emergency. So good.
Brake controls most always work. They must be long lived and they must wear long.
Well sealed cable is not affected by weather road shocks or deterioration.
Steel cable e sure and gives positive action
and the wear on a steel cable is negligible.
Strong steel cables provide powerful unfailing
and flexible connection between the brake pedal of the brake itself.
Even if we were to disconnect was two or even three of the cable control brakes.
There is sufficient power in the fourth brake to ensure stopping the car.
Such cable control brakes are smooth the pen double
positive and safe.