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Tilt Mechanism for a Display Device

IP.com Disclosure Number: IPCOM000053196D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Golledge, I: AUTHOR

Abstract

A control knob assembly used to adjust the angle of tilt of a cathode ray tube (CRT) display cabinet incorporates an automatic locking mechanism which permits single-handed operation of the assembly.

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Tilt Mechanism for a Display Device

A control knob assembly used to adjust the angle of tilt of a cathode ray tube (CRT) display cabinet incorporates an automatic locking mechanism which permits single-handed operation of the assembly.

The assembly is shown in detail in the various sectional views above. A shaft 1 passes through a formed portion 2 of a CRT display cabinet and is supported in a molded bearing 3. Shaft 1 carries a pinion 4 at one end which engages a rack (not shown) forming part of the tilt mechanism. A control knob 5 is supported on the other end of the shaft 1, held in place by a pin 6 extending transversely from the shaft 1 into a slot 7 in hub 8 of the control knob 5. Hub 8 is free to turn on shaft 1 a few degrees in either direction defined by the length of slot 7 before engaging pin 6 and thus rotating the shaft. The formed portion 2 of the cabinet also supports two ratchet forms 9a and 9b one behind the other, concentric with shaft 1, but facing in opposite directions. Two pawls 10a and 10b are housed in a carrier 11 fixed to shaft 1 and are spring loaded and located so that they respectively engage the teeth of the two ratchet forms 9a and 9b. Two pins 12a and 12b extend from the inside of the control knob 5 parallel to the shaft, so that under normal circumstances each just makes contact with a respective pawl 10a and 10b.

The construction and arrangement is such that when the control knob 5 is rotated in one direction, the pawl 10a or 10b...