Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1981-11-02
1983-12-13
Levy, Stuart S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
254270, 254272, B66D 324, B66D 320, B65H 7500
Patent
active
044201222
ABSTRACT:
A telescopically extendable hanging mechanism for suspending a lighting device has a driving mechanism provided with wires for controlling extension of the hanging mechanism. A wire take-up means for winding up or unwinding the wires is adapted for telescopically extending out or contracting the hanging mechanism. The wire take-up means is given a rotative force and consists of three discs of which the outermost disc has a recess at its outer edge. A ratchet wheel is provided in the wire take-up means and a sensor lever is provided swingably above the wire take-up means and is always pressed in the direction of the take-up means. The sensor lever is provided with pawls so arranged that they are engaged with the ratchet wheel when the sensor lever is swung toward the take-up means. A pulley is rotatably mounted at an end of the sensor lever and is adapted to receive the wires used for telescopically extending out or contracting the hanging mechanism. A limit switch is designed to detect any swinging motion of the sensor lever in the direction away from the take-up means to cut off the rotative force. A slider provided slidably on a diametrical portion of the outermost disc of said take-up means has its one end projected into the take-up means while the other end terminates in a sector portion positioned in the recess of the take-up means.
REFERENCES:
patent: 3148261 (1964-09-01), Schlenz
patent: 3182961 (1965-05-01), Le Bus, Sr.
patent: 3807648 (1974-04-01), Worwag
Hiroyuki Suzuki
Maslo Karl E.
Haugland Scott J.
Levy Stuart S.
Marshall, Jr. C. O.
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