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Counterbalance For Panels

IP.com Disclosure Number: IPCOM000098592D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

David, WK: AUTHOR

Abstract

Considerable use is made of a negator spring for counterbalancing a vertically sliding panel. It is often desirable, however, to move a panel upward when raised and downward when lowered past a center point. The device illustrated above accomplishes this through two cables A and B fastened at one end at points 10 and 11, respectively, on flanges of a drum 12. At the other end cable A is fastened to a negator spring 14 and cable B is secured to a bracket 15 carrying panel P. In position 1, the cable B acts on drum 12 through the distance R2 overcoming the spring 14 acting through distance R1 resulting in the panel remaining down. In position 2 both cables are wound on the drum and act through equal distances R1 resulting in the panel and spring being in balance.

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Counterbalance For Panels

Considerable use is made of a negator spring for counterbalancing a vertically sliding panel. It is often desirable, however, to move a panel upward when raised and downward when lowered past a center point. The device illustrated above accomplishes this through two cables A and B fastened at one end at points 10 and 11, respectively, on flanges of a drum 12. At the other end cable A is fastened to a negator spring 14 and cable B is secured to a bracket 15 carrying panel P. In position 1, the cable B acts on drum 12 through the distance R2 overcoming the spring 14 acting through distance R1 resulting in the panel remaining down. In position 2 both cables are wound on the drum and act through equal distances R1 resulting in the panel and spring being in balance. In position 3 cable A now acts through the distance R2 resulting in the panel being urged upwardly.

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