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The following is a description of the Remote, Local and Manual Control
Station Operations. This description applies to a system using a Single
switch to start and operate one or more Sirens from a Remote
Headquarters, and refers to the Schematic
Wiring Diagram (Figure 3).
"REMOTE" refers to a Signal Switch, Signal Light and
Circuits in a Control Box, located at a Central Headquarters Station.
"LOCAL" refers to Control Switches, Relays and
Circuits in a Control Box, installed near to, but not on the Siren.
"MANUAL" refers to Control Elements installed on the
rotating Siren Assembly.
The Central Headquarters Station Control Box
1. SIGNAL SWITCH. A normal open Push button type.
The first Four second pressure, closing contacts, will actuate Relays
that will start the Siren Engine. After the Engine has started,
any further pressure, closing contacts, will actuate other Relays that
will open Engine Throttle, immediately increasing the Siren Engine
speed to 4600 R.P.M. Release of pressure and the Siren Engine
will return to Idle speed of 650 R.P.M.
2. SIGNAL LIGHT. When GLOWING, indicates to the Operator, that Siren is running,
that Engine has normal oil pressure, water temperature and is ready
After starting the Siren Engine and Signal Light
GLOWS, or upon completion of a "Warning" or "All Clear" Signal. If
no further pressure is applied to the Signal switch, a Time Relay will
allow the Siren Engine to continue to Idle for a short time delay
period, then automatically stop the Engine. The Signal Light will
go out, indicating to the Operator, The Siren Engine is Secured until
further operation is desired.
Other Sirens may be connected in parallel and
operated from the same Remote Signal switch, or they may be independently
operated by individual switches which are ganged mechanically or
electrically through relays, so that the Sirens may be operated
separately or together as desired. Failure of any one Engine to operate
will in no way effect the others.
The Local Station Control
1. SELECTOR SWITCH. This is a double-pole,
double-throw switch which enables the Operator to select REMOTE or
MANUAL Operation. This permits Signaling or service testing of the Siren from
a position close to the Engine and eliminates the possibility of
inadvertent damage to the Service Man or equipment by the operation of
the Siren from the Remote Control Center while the Siren is being
2. IGNITION SWITCH. A Push-Pull type. Pull will
actuate Relays and start the Siren Engine; Push will stop the Siren Engine.
3. THROTTLE SWITCH. A normally open Push button
type. Pressure on switch will actuate Relays to open Engine Throttle,
immediately increasing Siren speed to 4600 R.P.M. Release of pressure and Siren
Engine will return to Idle speed of 650 R.P.M.
4. SIGNAL RELAY. Energized by the Siren Engine oil
pressure-temperature switch. It completes a circuit to GLOW Signal Light at
Central Headquarters when the Siren Engine is running and ready for
5. IGNITION RELAY. Energized by the Remote Signal switch, and in turn energizes
other Relays to start and Cycle Siren.
The Circuits from the Central Headquarters Station
are fed into the Local Station Control Box and operates a relay. The
output of the Relay, together with Local Control Circuits are fed into
the rotating Siren assembly, through four Slip rings mounted on the
The use of the Manual Control switches on the Siren
assembly is primarily for service and maintenance operations. Before any
operations are started, move Selector switch, in Local Station Control
Box, from REMOTE to MANUAL position. Disengage Clutch to prevent
assembly turning and Siren sound. Turning the Ignition switch in Instrument
panel "ON" starts Engine, "OFF" stops Engine (Figure 2). Throttle button
on Instrument panel is mechanically linked to Carburetor Throttle and can be
adjusted for desired Engine speed. Starter button on Instrument panel is
inoperative on Sirens having Remote Controlled circuits. The Penn switch
button at rear of Engine housing has three positions, "Start", "Run" and
"OFF", it is completely automatic and does not require manual
reset. After the Ignition switch is turned "OFF" to stop the Engine, A
Three minute time period must elapse to allow Thermal Time Delay Relay
to cool, before moving Selector switch to Remote position. When
service operations are completed, Clutch must be re-engaged and the
Selector switch in Local Station Control Box, moved from MANUAL to
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Schematic Wiring Diagram ]
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