Instructions for Assembly
and Operation of Model B Balopticon

With 500-watt Mazda Lamp

The Model B Balopticon, as it is
shipped from the factory, is assem-
bled ready for operation, with the
exception of the slide carrier and
the Mazda lamp. For safety in
shipment the 500-watt Mazda lamp
is removed from the socket and
packed in a carton, which is placed
inside the lamp housing.

by tightening the set screw (4).

Loosen clamping screws (5) and pull out the front standard (6), until the outline of the slide carrier opening is approximately in focus. The illuminated area on the screen should be evenly illuminated by white light, but should it be uneven, the lamp can be adjusted forward and back in the sliding plate at the bottom of the lamp house, after

Remove the top of the lamp housing (1) and take out the lamp carton and packing. Screw the lamp in socket, making sure, when the lamp is screwed in tightly, that the reflector attached to the lamp is at the back of the lamp house, and that the monoplane filament is parallel with the rear surface of the condenser. The mirror can be rotated about the base of the lamp, or, by loosening the set screw (2) at the lamp socket, the lamp can be rotated. Attach the connecting plug to any convenient lamp socket, but be sure that the voltage does not exceed 120 volts. Turn on the switch at the lamp and press down the red plug on the switch on the lamp cord.

Put slide carrier in holder (3) and
center the stationery part of carrier
with the holder. Clamp in position

loosening the clamping lever (7). In
one side of the field should be darker
than the other, loosen the clamp
screw (8) and shift the lamp either
to the right or the left. If top or
bottom of the field is dark, loosen
set screw (2) and raise or lower the
lamp. Be sure to tighten the
clamping devices after adjust-
ments have been made.

The above adjustments should
not be necessary on outfits received
directly from our factory, as each
outfit is tested and properly set
before it is shipped. Some of these
adjustments, however, may be
necessary when putting in a new
lamp, since there is some variation
in the position of the filament in
the globe.

Put in a lantern slide, with
"thumb mark" in upper right
corner, and focus on the screen by

rack (9), or by spiral adjustment on the projection lens. The slides are alternated in one side or the other of the carrier.

## With 6-volt Mazda Lamp

The same general directions are to be followed, but in addition it is necessary to see that the small supplementary lens, fitting over the lamp bulb, is directly opposite the silvered portion of the bulb. This lamp must not be connected to a circuit exceeding 8 volts. It is intended to be used with a 6-volt storage battery, such as used on automobiles for starting and lighting. It may be used on a regular 110-volt lighting circuit, however, by connecting with a suitable transformer or rheostat.

## With 30-volt, 14-ampere Lamp

Procedure for setting up is in general the same as with the 400-watt lamp, except that the reflector is clamped to the socket, instead of the lamp itself.

This lamp is supplied for use on a 30-volt lighting system, such as the Delco system. It also may be used on the regular lighting circuit, provided a suitable transformer or rheostat is used in conjunction with the lamp. Since only a short section of wire is supplied with the instrument when it is intended for use on a 30-volt system, the user should provide a connecting cable running from the lamp to the outlet at least the size of that attached to the lamp socket (No. 14).

If the lamp is used in conjunction with a transformer on the regular 110-volt lighting circuit, the cord from the transformer may be directly connected with any convenient lamp socket. As a transformer operates only with alternating current, a rheostat must be

supplied if direct current is to be used. With this device the lamp draws 14 amperes on the main line, and must not be connected with the ordinary lamp socket, but to some base board or other outlet having a capacity of 14 amperes or more.

## With Acetylene Burner

Because of their safety and cleanliness, acetylene gas tanks are recommended as a source of gas supply with this form of lighting. Connect the rubber tubing to the burner and tank, being sure that a good, firm connection is made. Remove the top from the lamp house, open the valve of the tank slightly and apply lighted match to burner. After the burner is lit, open the valve in tank until the burner just begins to make a hissing sound.

Adjustments for centering the light are the same as with the Mazda lamp. Before leaving our factory the reflector is set at the proper distance from the flame.

## General Remarks

The lenses should be kept free from dust or finger marks. A soft muslin cloth may be used for cleaning, after the lens surfaces have been moistened by the breath. The condensing lenses can be removed for cleaning by raising the top of the condenser holder, which is held fast by the small set screw (10). After they have been cleaned, the condensers must be replaced in their correct position. Where there is a difference in thickness of condensing lenses, the thicker one is to be placed nearest to the light.

We do not recommend a picture exceeding about 7 feet in width, when using the 6-volt lamp or the acetylene burner. Pictures up to 10 feet in width can be projected with the 500-watt lamp.