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2. Oppenheimer pole - Wikipedia

   en.wikipedia.org/wiki/Oppenheimer_pole

   Over time, the original mix of wooden and metal poles was upgraded with new poles, following Oppenheimer's patented innovations for metal telescoping poles. The so-called Oppenheimer poles were produced in Manchester and shipped to Australia throughout the 1880s and installed along the length of the Overland Telegraph Line.

3. Jack post - Wikipedia

   en.wikipedia.org/wiki/Jack_post

   Jack posts are telescopic tubular steel props consisting of two primary parts, the main part of the post, and the jack screw or other adjustable fitting on one or both ends. Both ends are normally fitted with flat metal plates on the end, providing additional support area.

4. Curtain rod - Wikipedia

   en.wikipedia.org/wiki/Curtain_rod

   Curtain rods can be made of many materials including wood, metal and plastic. Curtain rods come in almost endless styles and designs. Not all curtain rods are simple straight poles; curved and hinged poles are available from numerous companies, allowing installation in bay windows and around curved walls and corners.

5. Whip antenna - Wikipedia

   en.wikipedia.org/wiki/Whip_antenna

   Whip antennas for portable radios are often made of a series of interlocking telescoping metal tubes, so they can be retracted when not in use. Longer whips, made for mounting on vehicles and structures, are made of a flexible fiberglass rod around a wire core and can be up to 11 m (35 feet) long.

6. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   A special form of the radio tower is the telescopic mast. These can be erected very quickly. Telescopic masts are used predominantly in setting up temporary radio links for reporting on major news events, and for temporary communications in emergencies. They are also used in tactical military networks.

7. Telescoping (mechanics) - Wikipedia

   en.wikipedia.org/wiki/Telescoping_(mechanics)

   Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...