P.O. ENGINEERING DEPT.
Issue 1, 1936
POLICE TELEPHONE AND SIGNAL SYSTEM
SWITCHBOARDS, PA 150 AND 150 TD )
Signalling Lamps and Bells
The lamp used for signalling police officers by intermittent flashing is a Lamp, 100
watt, G.S., and is normally situated at the top of the pillar or police kiosk,
inside a specially constructed lantern (see Fig. 1, P 1106).
2. The lamps are normally provided and maintained by the Department. Exceptions are
referred to in P 3102, para. 9 and P 3103, para. 50.
3. Lantern, PA No. 1
This is a cast-iron fitting containing a lamp holder and, a specially constructed
cylindrical lens, through which the
flashing of the signal lamp can be seen in all directions. The Rate-book title of the lens
is Glass, No. 40.
4. Bell, No. 60A, Unmounted
This is a loud toned bell which can be fitted in the dome of a Lantern, PA No.
1 to ring in unison with the flashing of the signal lamp. The bell has a solenoid
movement, is power operated and arranged for working on 100-130 volts D.C., 200-260 volts
D.C. or 200-260 volts A.C.
Lantern PA No. 1