Evening star., 1912-01-08

winch SnaH DC OolteQ SeCuKely 70 etcei OF m1-
Drums Machine chased drums shall be used
I'm Ing I provided p Tor % each cable. All drums % sor d.
rect connected machines shall be bolted to the
gear gear wheel or to- to spider attached thereto; All
shall be secured in proper key-seats.
Following are the diameters Of drums and
Size Of Minimum Diameter Of
Rope Drum Sheave
inch 70 inches
$50 IS 3
3 5
Motors; All motors for electric elevators shall
SHAFT. 81 ''0e0 WIN TWO bearings '0' Inc af"a'o's
Capacity. All passenger elevators shall have
of IS pounds per square foot Of car door area,
except automatic residence elevators. which
Th ne1 ali Ie be S
the elevator contractor not later than fifteen
days after - the car is put into sersiss shall ),
not less than I'VE for any part OF the apparatus
or material.
CONTROLLER.
Electrics- All electric passenger elevators snail
be provided with electric switch control and shall
be operated by switch that automatically
se wen and
residence elevators may employ push eutton
noor-stop switches instead OF the single car
until all the protecting door contacts are closed.
as hereinafter provided under 'Interlockins
In addition to the stop motion limiting device
on the machine. when same Is connected to the
drum by intermediate or secondary motion all
electric elevators shall be equipped with electric
hatchway limit switches connected to the con-
troller that should the travel beyond the
shaft the current will be cut Oh from the motor.
the brake applied. and the car brought to
Slack Gable Device. All electric elevators shall
be provided with slack cable switch 90 con-
nected IN the controller that the current VIII be
the car brought to gradual stop, should the
hosting cables become slack or break: This
drum wherever possible. On traction elevators.
the slack cable, or pilot governor switch, should
ernor at the time that the safctfes arc put Into
Hydraulics Operating valves on hydraulic ele-
vatOrs shall be controlled by means OF wheel de-
valves shall be provided on the machine to cause
the ca1-to come to a gradual stop at the upper
Circuit Breakers. Electric passenger elevators
employing motors rated at more than nye horse
cult breaker. mounted attached to the control
switchboard. Elevators having a speed greater
pounds or more shall be provided with no.
voltage circuit breaker mounted or attached to
the control switch board.
These circuit breakers for electric passenger
elevators shall be provided with two connections
Of special construction in addition to the above
solenoid, so that when the circuit breaker is open
the coil Of the brake magnet will have an open
when open will affect instantly the brake magnet
and cause the brake to he applied to the ma
chine. Other apparatus fulfilling each and every
duty described in this paragraph in the precise
manner and to the same degree OF emcienSy as as
accepfea e se in s lien sf Of said ID Apparatus. apps
Wiring aud Insulation. All apparatus under
these regulations using electric current r o sh... IL
iron conduit. All switches in connection with
automatic lifts shall be incased in metal.
boards. at the brake solenoid. and similar places.
and the metal piping cannot be used convenient,
y, the wires may be dnraby tsPed or NJ ,nelesea ra
wires are run together they should be dWably
taped in the form Of cable and well painted
with an insulating compound.
The main line switch shall be located In the
motor room convenient to the controller.
Where switches are required on collapsing gates
or sliding doors on electric elevators. they may
be connected in series with the car switches
where the same Is electrically controlled known
switch control. But when the car is me-
chanically controlled. the switches shall be con-
OF preferably on the electric coil g brake sole
mold magnet. These switches shall Be 80 con-
to the
opened more than two inches.
In the event ct hydraul,e , tnssanss,cn M an
Interlocking switch protection is required In
the following cases:
AuIOmdIlC EIleVHtOrb. AutOmdtiC puSu
elevators having a speed not greater than loO
feet per minute and capacity Of not more than
doors to the as are With inter
locking switches and fastenings. and each en-
trance to the car is provided with q collapeing
or sliding gate, protected with q contact switch
In series with the operating switches on the con-
troler. The switch on this car gate shall be pro-
vent the car being called or sent to another
floor untn this gate has been opened and closed
Trojoht con,nsrtment Elevsf TORS PassenRer ele-
vator cars having a freight compartment above
or beneath. otherwise known as doubie.decs
approved. on freight compartments below or
above the. car. sach gates shah be equipped
Il Wiz
operator to start the car. In addition to the re-
quirements above specified for douele,deck & cars, n
provided with durable switch connection, so that
the elevator operator cannot start the car II any
door to the elevator shaft be open more than two
inches.
Doors More Than -Four Inches From Well Hole.
four T inches che from the facia Of the well hole. it
will be necessary to have collapsible gates or
sliding doors on such car openings and IN case Sc
provided with durable switch that ts connected
In series with the car switch controller 80 that
sliding door or collapsible gate on the car is
open more than two inches.
seneer elevator car has more than one exit ne
cessitating elevator operator leaving bis control
ler such elevator car shall have sliding door
or collapsible gate equipped with a switch. which
shall be connected In series with the controller
of the car same specified for douhle-deck eleva-
tors. This regulation does not require collapsing
tended in this particular instance to care Ior the
door opening which is 6SR sxRy from the operator.
Double Deck Hereafter. there shall be NO per
NIT issued for freight cars attached to underside
Of passenger or freight elevators. nor shall there
be any construction permitted known as double
deck cars.
framing of passenger elevator cars. A solid
wrought.iron canopy shall cover every passenger
elevator car The sides Of the cage shall be en-
# srllworI is used for he cage there shall be
no openings greater than two inches IN the same
The underside Of all car platforms shall be COW
cred with sheet metal: .
provided for all passenger cars either at the
roof or side Of the cage. at the discretion Of the
Inspector Of Buildings. -
in cars shall be 50 located that the operator.
with one hand always on the controller. can
reach across the door opening while the car Ii
in P.te ~ 20
other person or persons having charge or control
of any elevator now in operation In the District
hereafter placed in buildings shall cause to be
fastened in a conspicuous place IN eaio eievaoCFs
metal plates having suitable raised letters on the
same. which shall prescribe the number OF
have capacity to carry: but no more than eighty
per cent thereof shall be carried thereon.
Speed. The maximum speed OF any elevator
shall not exceed $50 feet per minute except In the
case Of traction machines where $50 per minute
will be permitted.
Safeties Ali passenger elevators except those
of the p9nger type snall ne proyldeG a. w1n Ill., .
tors rated at $50 feet per minute. the safety
device shall be Of the slow grip type: which will