Please select from
the list below or the links on the right.
Electrical switches for
educational projects are available in many different styles. The "knife switch" is the simplest
form of switch that easily demonstrates the functioning of a switch. Old sci-fi
movies ("Frankenstein (1931)" or "Young Frankenstein (1974)" , for example),
made extensive use of these switches in the laboratory scenes.
Please select the type of switch
you may use for your project and then click on the image for more details:
|Vintage Knife Switches
Vintage knife switches have a small base
usually made of Bakelite or hard plastic with the brass "pole(s)" and
slots "throw(s)" mounted on the base using screws. Wire connection
is usually made by wrapping the bare end of the wire to a screw and
tightening it with a flat or Phillips screw driver.
Vintage knife switches are generally used
by hobbyists and higher grade students who can use tools such as screw
drivers. These switches are usually rated
for up to 18 volts and up to 15 Watts. See
student grade knife switches have larger base usually made of hard
plastic and have contact screws with plastic knob. You will not need a
screw driver to make connections to these switches. Metal plates used to
make the lever and slots are thin and may easily bend under pressure.
Rated 18 Volts, 18 Watts
cost switches usually need some adjustments and verification before use
to make sure that the contacts are secure and the metal lever can easily
enter the throw slot. See more
|Deluxe Knife Switches
Best educational knife switches are built
to last from project to project and from year to year. Materials are
sturdy and usually do not need any inspection or alignment before use.
The larger base is usually made of hard plastic and have contact screws
with plastic knob.
Rated 18 Volts, 25 Watts
You will not need a screw driver to make
connections to these switches. Metal plates used to make the lever and
slots are thick and do not easily bend under pressure.
See more ...
|Simple contact plate
One contact plate and two screws usually
mount on a wooden board to act as a permanent (Off - On) or temporary
(push button) switch. This simple and inexpensive method is used in many
science kits. Minimum order 2000. Price $150/1000. Please call for
Lear how to
design switch circuits!
Distributors of scientific and educational products
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