Figure 13-35.—Snap switch panel assembly.
flashing system indicators when a warning or
emergency condition occurs. Motor-driven dual-cam
and three-cam activated switches open and close control
or status signal circuits to provide the flashing effect on
indicator lamps.
Snap Switch Panel Assembly
The snap switch panel assembly (figure 13-35)
provides manual control of switchboard power buses.
An individual panel mat contains either one or two snap
switches.
The snap switch (figure 13-36) is a device that
opens or closes a circuit with a quick motion. Rotary
snap switches are used extensively in the distribution
Figure 13-36.—Snap switch.
Figure 13-37.—Manually operated JR switch panel assembly.
sections of switchboards to connect the shipboard
power supplies to the various switchboard power buses.
Manually Operated JR Switch Panel Assembly
The manually operated JR switch panel assembly
(figure 13-37) provides manual switching and action
cutout (ACO) functions.
The manually operated JR
switch panel assembly uses either a 2JR or 4JR switch.
Both switch types are similar in construction and differ
only in the electrical application because of switching
action. A JR switch as shown in figure 13-38 is made
up of a variable number of waferlike sections. As the
switch is manually positioned, one or more moveable
contacts are positioned to each switch position on the
wafer. The contacts may connect (bridge) two or more
contacts on each wafer effectively opening or closing
circuit paths as required to configure the system for
normal or alternate operation.
Remotely Operated JR Switch Panel Assembly
The remotely operated JR switch, panel (figure
13-39) provides remote and manual control of signal
routing and ACO switching. The automatic junction
rotary (AJR) switches used in these assemblies are
driven by a motor and gear train servo system. The
automatic switches allow control of switching functions
from remote stations. Analog switchboards used with
combat direction systems use control signals provided
by the multiplexing data converter to activate the
switches and provide status signals back to the
converter to indicate switch position to the system.
13-38
