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There are basically two types of seats; bench seats or bucket seats.
A bucket seat is a low, separate seat for one person. Although we
think of them as relatively new, it is interesting to note that in
1905 Henry Ford's first model A had bucket seats.
Bench seats are a continuous cushion and backrest across the width of
the car (although some vans might have them running along the length
of the van). Bucket seats are single units with a separation between
the left and right seats.
Usually vinyl leather and fabric are used for upholstery.
"Flatsprings" are used for comfort. A flatspring is a piece of wire
that is bent into a zigzag pattern. Both ends of the wire are
attached to the seat frame, with additional lengths added every six
inches. Foam padding is used to cover the flatsprings.
The front seats ride on rails that are bolted to the floor. This
arrangement allows the seats to move backwards and forwards to suit
the driver or passenger. The seat adjustment lever is attached to a
latch that fits into teeth along the rail. Moving the lever releases
the seat, and allows the seat to move. At any point of the seat's
movement, releasing the lever engages the latch with one of the
teeth. Usually there is also a pull-spring; this draws the seat
forward when the latch is released.
The rear seat usually doesn't move, because it is secured to the
floor of the car. It's backrest is attached to the partition
between the passenger compartment and trunk.
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