Specifications

M1U3TD-J472E
5.4.2 .1.2.2 Dimensions, displacement. and resistance.
resistance shalJ conform to the criteria in Flgum 5.
Dimensions, displacement, and
5.4.2 .1.2.3 Color, shape and size coding. Color, shape, or size coding or a combination may
be used as follows:
a.
b.
c.
Color may be used to aid in identifying various keys by function or use location and when
illumination is adequate to differentiate the colors. Red(11105or21105 of FED-STD-595)
shall be reserved for emergency functions.
Shape coding may be used when it is desirable to identi~ a given key by feel. When shape
coding is used, sharp comers shall be avoided.
Size coding, within the height limits of Figure 5, may also be used if no more
thantwo sizes
are employed.
5.4.2 .1.2.4 Marking and labeling. Keylock switch applications shall include appropriate
position markings and labels (see 5.5).
5.4.2 .1.2.5 Other
retirements.
a,
b.
c.
d<
e.
Keys with
teeth on bothedges, whichfit the lock with either sideup or forward,are
preferred.
Keyswitha singlerow of teethshouldbe inserted into the lockwiththe teethpointing
up or
forward.
Locks should be oriented so the key’s vertical position is the OFF position.
Operators should normally not be able to remove the key fmm the lock unless the switch is
turned OFF.
Actuation of an item by a key operated switch should be accomplished by turning the key
clockwise from the vertical OFF position.
5.4.2.1.3 Discrete thumbwheel controls.
5.4.2 .1.3.1 APPlicAon. Thumbwheel controls maybe used if the fimction requires a compact
digital control-input device (for a series of numbers) and a readout of these manual inputs for
verification. The use of thumbwheels for any other puqmses is discouraged. Detent indexing units
should provide 10 positions (O- 9) in digital or binary (3 or 4 bits and complement) outputs.
5.4.2 .1.3.2 S+mue. Eaohposkionamwi theckcumk=w
ofadisuetetlmmbwbd shallhave
a concave surface or shall be separated by a high-friction area which is raised from the periphay of the
thumbwheel. The thumbwheels sha!l not preclude viewing the digits within a 30° viewing angle to the
left and right of a perpendicular to the thumbwheel digits.
5.4.2 .1.3.3 Coding. Thumbwheel controls may be coded by location, labeling, and color (e.g.,
reversing the colors of
the least significant digit wheel as on typical odometers). Where used as input
clcvm%,thumbwheel swltctt Q(?or Nonrurf powttom shotdd be color coded w prlitit ~ viwal
d-k
!M the digits hm’ebeen rrwt m tirir(W r-vM-WWW1 positions.
< ~ ? 1 ~ ,4 ~ireL.lionof ~c)vement, lvlnvln~ the thl~mhwhecledge fonvard, or upward. m to
.—
Ihc righ[ shall incrc;lsc (he setting.
5(1