Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1979-03-06
1980-09-09
Lacey, David L.
Gas separation
Means within gas stream for conducting concentrate to collector
55300, B03C 376
Patent
active
042215730
ABSTRACT:
An electrostatic precipitator rapping system of the type which lifts weights and then allows the weights to fall to impact on precipitator elements to impart particulate-dislodging vibration thereto. The system includes a rotating drive shaft and a plurality of individual rapping mechanisms disposed along the drive shaft. Each rapping mechanism includes a driving assembly affixed to the drive shaft and a driven assembly mounted for pivotal movement. A means attached to the driven assembly lifts a weight as the driven assembly pivots in one direction towards a release position and allows the weight to fall to impact as the driven assembly pivots in the other direction towards a resting position. For pivoting and releasing the driven assembly, the driving assembly carries a first engagement member radially spaced from a first axis defined by the drive shaft, the pivotal mounting of the driven assembly in on a second axis offset from the first axis, and the driven assembly carries a second engagement member radially spaced from the second axis for engagement by the first engagement member. The radial spacing of the first engagement member is greater than the distance between the axes and less than the total of the distance between the axes and the radial spacing of the second engagement member such that as the shaft rotates the first engagement member engages said second engagement member at the driven assembly resting position and at positions intermediate the resting and release positions, and said engagement members disengage at the driven assembly release position.
REFERENCES:
patent: 333021 (1885-12-01), Morgan
patent: 1168543 (1916-01-01), Newhouse
patent: 1433266 (1922-10-01), Fisher
patent: 2004494 (1935-06-01), Shoe et al.
patent: 2547573 (1951-04-01), Gannone
patent: 2550809 (1951-05-01), Hedberg
patent: 2702090 (1955-02-01), Brown et al.
Lacey David L.
Research-Cottrell, Inc.
Stowell Harold L.
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