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to use electricity only. Dash, coil and speedometer lamps are depicted at C. A combination trouble lamp and cigar lighter is shown at D. The trouble lamp at E is an easily portable form and is convenient for use around the power plant, gasoline tank, etc., deriving its current from the regular battery. A combination tail lamp, having red lens at the rear and a white glass at the side to illuminate the number plate, is shown at F. The approved construction of a variable focus electric head lamp is shown at G.
The simple attachment shown at Fig. 293, A, is intended to convert any dry cell to a convenient inexpensive and portable electric lantern. It consists of a reflector carried by a frame that attaches to the terminals of the dry cell. To take the strain from the terminals when the cell is carried, a supplementary clamping band is also secured to the handle, this being fastened to the top of the cell.
The feature of the Federal electric hand lantern shown at B, is that it casts no shadow on the ground beneath it. Instead of having the lamp at the top with a solid base beneath, it has an open foot consisting of a ring and four legs, so that the light is strong immediately under the hand of the person carrying it as well as spread all around. It is fed with current from a special dry cell that is easy to replace, and clips are supplied to fasten the lamp to the running board of the car. It is very compact when folded and the lamp bulb is well protected, while there is a space inside the dry cell where a spare bulb can be put.
For automobiles without electric lighting sets when a moderate illumination is required now and then for short periods, there is a great deal in favor of dry batteries as a source of current, as they are less trouble to look after than oil lamps. The Wireless Autolight depicted at C is a well-made case supplied with a lamp and reflector, glazed in white, green or red.
green or red. It takes a standard No. 6 cell.
Searchlights of the form shown at D are also becoming popular because these are carried on dirigible brackets attached to the windshield or any other convenient part of the car and the beam of light can be directed against sign boards, around curves, etc., at the operator's pleasure.
Novel Bulb Designs.—Combining two separate and distinct lights in one, the Tulite bulb, shown at A, Fig. 295, is designed solving the headlight glare problem. Two types of this bulb are shown, type R being inserted in the lamp with the minor filament above the major, projecting the light to the roadway at short range. This allows the focusing of a strong headlight as far ahead as desired and, when switching to the minor filament, a good driving light at 40 to 75 feet in front of the car. Type A has a minor filament, mostly surrounding the major and diffuses the light in a general way, covering eight to ten times the area of the major filament when lighted. The standard Tulite bulb is 4 candlepower on the minor and 20 candlepower on the major filament, but other combinations are furnished.
A new type of headlight bulb is the Argon depicted at B, which is filled with nitrogen gas, put into it by pressure. This gas contains a small percentage of argon, about 2 per cent., which, the maker claims, permits the use of a higher voltage for a given filament. The filament is of drawn tungsten wire and is so coiled that when properly focused the lamp does not produce dark rings.
Battery Ignition System Hints.. 179
Battery Ignition Systems, Trou-
Battery Ignition, Timing.. 181
Battery, Simple Primary.
Baumé-Specific Gravity Equiv-
Bijur-Hupmobile Starting Gear-
Bijur One-Unit System.
Bijur-Packard System.... 383
Bijur Systems, Lighting and
Bijur System Parts.
Bijur Two-Unit Systems.. 373
Bijur Voltage Regulator..
Bosch D. U. 4 Magneto...
Bosch N. U. 4 Magneto... 202
Bosch-Rushmore Automatic Re-
Bosch-Rushmore Regulator.. 458
Brushes, Care of...
Bulbs, Novel Designs of.
Care and Repair of Commuta-
155 nating Current Mains...... 149
Cranking Action, Voltmeter Test
Charging Edison Battery....... 160
Defective Windings, Testing for 447