MIL-PRF-22710H
d. Binary coded octal with separate common for not true bits:
Dial Marking
Com. X ( ) & Y( )Conn to:
(1) Dial reads 0; common Y connected to
1
2
4
terminals 1, 2, and 4 while common X
is not connected to any terminals.
0
o
o
o
·
1
o
o
(2) Dial reads 1; common X connected to
·
2
o
o
terminal 1, while common Y is
·
·
3
o
connected to terminals 2 and 4.
·
4
o
o
·
·
5
o
(3) Dial reads 2; common X connected to
·
·
6
o
terminal 2, while common Y is
·
·
·
7
connected to terminals 1 and 3, etc.
6.3 6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which
are, at the time of award of contract, qualified for inclusion in Qualified Products List (QPL) whether or not such
products have actually been so listed by that date. The attention of the contractors is called to these requirements,
and manufacturers are urged to arrange to have the products that they propose to offer to the Federal Government
tested for qualification in order that they may be eligible to be awarded contracts or orders for the products covered
by this specification. Information pertaining to qualification of products may be obtained via email to
vqp.chief@dla.mil or from the DLA Land and Maritime, Attn: DLA Land and Maritime-VQP, 3990 East Broad Street,
Columbus, OH 43213-1199.
6.4 Definitions.
6.4.1 Thumbwheel switch. A thumbwheel switch is a panel mounted switching device which provides a visual
indication of switch position. Its means of actuation can be by a "knurled" or "tabbed" wheel.
6.4.2 Switch module . A switch module is a self-contained thumbwheel switch.
6.4.3 Switch section . A switch section is the section containing the electrical circuitry (similar to "switch deck" as
applied to thumbwheel switches).
6.4.3 Plating. When base metals intended for intermetallic contact form couples, they are to be plated with those
metals which will reduce the potential difference.
6.4.5 Stacked switch module (see 3.4.5.3). A stacked switch module is a thumbwheel switch assembly consisting
of one switch module to which one or more switch decks have been affixed. A stacked switch module utilized one
thumbwheel with all rotors keyed to and driven by a common actuating shaft.
6.4.6 Thumbwheel switch assembly. A thumbwheel switch assembly is a switch assembly incorporating one or
more switch modules or stacked switch modules on a common mounting bracket.
6.4.7 Switch deck. A switch deck is a switching mechanism permanently affixed to a switch module, and whose
rotor is permanently keyed to the rotor of the switch module. It does not contain the "knurled" or "tabbed" wheel.
6.4.8 Switch station. A switch station is a specific switch module or switch section location in a thumbwheel switch
assembly.
6.4.9 Push-button switch assembly. A panel mounted switching device incorporating one or more switch sections.
The normal actuation is perpendicular to the plane of the instrument panel.
6.4.10 Cycle (see 4.5.14). A cycle should consist of 360 degrees clockwise and 360 degrees counterclockwise
rotations. When a device has stops, it should be operated an additional number of rotations to equal a total of 360
degrees clockwise and 360 degrees counterclockwise angular rotations. For unidirectional rotation devices, a cycle
should consist of 720 degrees rotation.
6.5 Angle of throw (see 1.2.2.3). The number of angular degrees the shaft rotates between adjacent detent
positions.
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