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294
SWITCHES
LEVER SWITCHES – DESIGN FEATURES PHONE: 773 792-2700
* Please visit the product pages on our website for the most up-to-date product information
LEVER SWITCHES
DESIGN FEATURES
High quality, field-proven Switchcraft ? lever switches are available
in a wide selection of illuminated and non-illuminated versions,
2- and 3-position, locking and non-locking functions can be
provided. Switchcraft illuminated lever switches feature choice of
colors, wide selection of switching circuits, single lamp
illumination and ease of mounting and lamp replacement.
All switches utilize nickel silver springs without “form” at point
of flexing to insure long spring life. The springs are assembled
into a conventional stack assembly, insulated from each other
by phenolic spacers with plastic tubing press-fit through each
stack, insuring correct alignment of contacts and providing
high insulation resistance.
APPLICATIONS
Various front panel switching applications on computers,
telecommunications systems, industrial control equipment,
intercoms, ground support systems, medical electronics,
scientific instruments, broadcast consoles and test
instrumentation.
CONTACTS
Below are listed the basic contacts available on switches in
this catalog:
1. Fine silver contacts rated at 2A, 200W (maximum)
AC non-inductive load.
2. Welded cross bar silver contacts rated at 3A,
300W (maximum) AC non-inductive load.
3. Welded cross bar palladium contacts rated at 2A,
200W (maximum) AC non-inductive load.
4. Welded cross bar gold alloy contacts rated at up to 1A,
100W (maximum) AC non-inductive load.
(Dry circuit applications.)
BASIC CONTACT FORMS
Below are the basic contact forms available standard on all
Switchcraft Lever Switches. Specify circuits needed by
referring to the letter identification and respective location on
frame. See dimensional drawings for stack switch location.
To avoid ordering special switches it is possible to use a larger
standard circuit, providing the circuit fulfills your requirements.
Circuit Form K is widely used in talk-listen (intercom) function
applications. In normal position (neutral), switch does not
contact upper or lower contact spring. During typical
operation, lever is held in upper (momentary) position while
speaking. Releasing lever allows switch to return to neutral.
For listening, lever is moved to down (locking) position. Lever
is manually returned to neutral when finished.
SCHEMATIC
DIAGRAM
FORM K
ORDERING STANDARD SWITCHES
Order lever switches by part number from pages 295
through 298.
LAMP DATA
Lever-Lite ? switches use T-1 3/4 flange base lamps which
are available from commercial sources.
ORDERING SPECIAL SWITCHES
Lever Switches
Should you desire a special version of any Switchcraft ? lever
switch not shown here, we require the following information:
1. Switch series.
2. Number of positions.
3. Mechanical action (locking, non-locking, etc.).
4. Contact configuration for each position.
5. Type of contact material.
6. Color sequence (Lever-Lite III).
UL RECOGNIZED LEVER SWITCHES
Seven series of Switchcraft lever switches are UL recognized.
These switches are available on special order to fulfill your
switching requirements which specifically require UL listed
switching devices.
1. Series 12000
2. Series 41000
NOTE: Refer to switch series in this catalog for full mechanical
A
B
C
D
E
F
specifications and additional standard and special features.
DIMENSIONS ARE FOR REFERENCE ONLY
www.switchcraft.com
Inch
(mm)
? Registered trademark of Switchcraft, Inc.
Note: Contact your Switchcraft Representative for price and delivery
发布紧急采购，3分钟左右您将得到回复。
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