This Stand has a heavy brass cup, with four binding screws, capable of holding crystals up to and including ¾ in. diameter.
A hollow standard encloses a brass ball. Through an opening in the wall, a brass arm with hard rubber handle is secured fast to the ball, making a ball and socket joint, allowing it to be adjusted at any angle or used in any position.
A hole for the introduction of different size wires extends through the arm. A set screw in the side of the arm binds the wire.
Supplied with two binding posts. All mounted on a heavy genuine hard rubber base 2¼ × 4¼ × 3/8 in. All metal parts nickel plated. A spring rests on the ball in the hollow standard and sets into a cup under the adjustsing screw, so that varying pressures can be had as circumstances require. Remains permanently in adjustment under jars and vibrations of every description.
| List. No. | Price | |
| 248 | Universal Detector Stand | $3.00 |
It is pocket size, 8 x 4¼ inches, contains 248 pages, with over 1,100 illnstrations, and describes in plain, clear language all about Bells, Push Buttons, Batteries, Telephone and Telegraph Material, Electric Toys, Burglar and Fire Alarm Contrivances, Electric Call Hells, Electric Alarm Clocks, Medical Batteries, Motor Boat Horns, Electrically Heated Apparatus, Battery Connectors, Switches, Battery Gauges, Wireless Telepraph Instruments, Ignition Supplies, Etc.
There exist a thousand and one ways where electrical devices may be used, and to know what is best for your purpose yon need this catalog. It costs you'nothing.
You should hav it even if only superficially interested. Around about you every day you read of some inarvelous occurrance in which wireless ptayed a distinguished part. It may not be entirely clear to you. The Manual will explain it. To the student of Wireless Telegraphy, the Manual contains much that is indispensable to a proper understanding of the art. A good portion of this is now published for the first time.
We ask ten cents ($.10) for it—give you a coupon receipt which can be applied on any order amounting to One Dollar ($1) or more.
Send your name and address now, and get one of the most cumplete, comprehensive and reliable wireless pamphlets published.
