US2380993A

US2380993A - Electrostatic charging structure

Info

Publication number: US2380993A
Application number: US505473A
Authority: US
Inventors: Elroy W Yungman
Original assignee: Westinghouse Electric Corp
Current assignee: CBS Corp
Priority date: 1943-10-08
Filing date: 1943-10-08
Publication date: 1945-08-07
Anticipated expiration: 1962-08-07

Description

ATITORNEY E. w. YUNGMAN Filed 0on8, 1943 ELECTROSTATIC CHARGING STRUCTURE toned Aug. r.- is es uni-res seer retires nu; sunscreen iiuoiieotion @ctoher 8 Edit, Scrini' No. steers sci. mes 7) scum This invention relates to e commercial structure for an ionizing moons oi s two which charges particulate matter; end, more particuioriy, is directed to an improved dust-charging menus for an electrical dust-precipitstor of a. type such as shown in G. W. Penney Patent No. ensures, issued Qentember it, rose, and in pntent-opplicanon Serial No. tosses oi E. H. R. Fees and I. R if: was, flied concurrently herein. it is among the obiects oi my invention to provitie u dust-charging menus of u Woe described whichwili be rugged in use. which has n iow cost, and which can be chesnly end ouiciziy monui'ectured.

It is a particular object oi my invention to provide a. novel ionizing-wire supporting means which lends itself to quick assembly and disussembly. w

litany advantages, innovations. features end details of my invention will be discernible from the foliowing description thereof, which is to be taken in connection with the accompanying drawing the figures of which ere somewhat schetions oi these arms:

Figs. 11 and 12 one perspective views for showing steps in the operation of forcing the ionizingwire supporting arms into place; and

Figs. 13 and 14 are sectional views through 'I end 8, respectively, of the wire positioning por- 4 iii the opposed sides 2. Ends of spaced insulators ere secured to one ground-electrode and ends of spaced insulators ii are secured to a difierent ground-electrode. The insulated ends of these insuiotors d and t are on the same side of the groundeiectrcdes. and support ionizer innerireme i comprising epair of connecting-memhers ii, each connecting member being secured to the insuinted ends oi n pen-ox insulators associnted with one ground-electrode. Each connecting-member comprises an elongated ban paralleling the nssocioted ground-electrode. having o, control-portion ii and supporting end-portions iii which are turned toward the ground-elem trodes. as indicated in Fig.- 2. To the entreme ends'oi' aligned supporting. end-portions it. on difierent connecting-members, means are secured to which arm for positioning ionizing-wires are attached.

Such means comprises like channel-members ii bolted or otherwise secured to the extremities of the end-portions iii. each channel-member bcsupport it, o. third inner channel-member i3 is secured which is like the other channel-members end in parallel spaced relation with respect thereto. However, the inner channel-member i3 is slightly closer to the ground-electrodes because the projecting supports it aresomewhet longer,

in this direction, than the end-portions i t.

Each chsnnebineniber is U-shsped and comprises scentral support-member It from which a channel-member, at right angles to each other,

showing a modified latching groove or hole;

. A dust-charging means utilizing my invention, to which, however. I am not lilmted, may com- "prise a rectangular ionizer casing-flame I, having lengthwise'opposed sides 2 and transverse opposed sides I boundingupstream and downstream faces for a gas-flow. A plurality of parallel tubular groimdelectrodes 4 are supported inside the casing-frame in spaced relation, their perpendicularly project parallel spaced leg porconstitutes tions i5 and it, so that the channel an elongated singular member. Somewhat. cen- 0 trally along the support-member it. a plurality of elongated latching means in the form of grooves or holes I! are provided spaced length-' wise along the channebmembcr. A pair of rightangular restraining openings orholes IB and I9 are provided for each latching means, one on each side of a hole ii. each restrainingopenlng having a portion at on edge of the support member and'a'portion continuous therewith in the legportion oi the channel, as indicated in Figs. 4. 11 and 12. The surface 20 bo'undingthe furthermost part of each restraining opening toward the free edge of the legportions, forms an abutment surface against which support-arms for ionizingwires are restrainably held.

ends being secured in any suitable manner to Figs. 5, 6, 7 and 8 show diflerent ionizing-arms 2|, 2!, 2a and 26. respectively. having similar anchoring-portions 2!, by means or which the arms are secured .to the channel-member. and wire-supporting

portions

28, 21, 28 and 29, respectively. The arms have no clear line demarcation between the anchoring-portions and the wire-supporting portions, but that part engageable with the associated channel-member for attaching the arm thereto may be considered the anchoring-portion. -In Figs. 7 and 8 the anchoring-portion may even be considered somewhat longer, with the wire-supporting

portions

28 and 29 at an angle to the anchoring-portion.

The anchoring-portionsoi the dirlerent arms, which are preferably springy stiff steel-wire, are shaped to provide an offset detent or arc-part 3i, lying in a plane, from the ends of which two straight arm-parts 3i and 32 extend with their axes in line. An extreme end of each or the supporting-arms is provided with a suitably shaped bent-part for securing or confiningly positioning an ionizing-wire.

Figs. 11 and 12 indicate the manner in which the arm may be anchoring in a channel. lhe

anchoring-portion 25 is inserted through the restraining openings l8 and I! so that an arm-part ii is associated with one restraining opening and the opposite arm-part 32 with'the other restraining opening; these openings being oi sumcient length transverse to the channel-member, and the arc-part being so formed that the anchoringportion it will slip into the position shown in Fig. liby suitable manipulation, with the arepart away from the latching-hole ll. After the arm is put in this position, it is twisted to cause the arc-part to latch inside the latching-hole ll. The maximum altitude or distance of the farthest point on the arc-part lid to a line joining the arc-part 80 can enter the latching-hole ll, the

arc-part riding on the channel-member until it snaps into the latching-hole. Such flexing presses the arm-parts 3i and 32 forcibly against the abutment surfaces 20 of the restraining'openlogs. The length 01' the latching-hole is such that it engages parts of the arc-part for the reaction forces. Consequently, the supportingdrms can be strongly secured to the channelmember with the wire-supporting portions extending in any desired direction, depending upon shape of the arm.

a specific example of a construction utilizing niy invention, a channel-member comprising a central support portion or body-portion I one inch between legsat right-angles thereto and legs oi in length was provided with trans-. verse elongated latching-holes 1%" in length and about k" in width (or receiving a spring steel wire .062" in diameter, having an arc-part curved on a V radius, with a height between its chord and outer periphery of i the abutment surfaces 20 being a maximum of from the central support-portion H. The portions of the restraining openings along the central supportportion oi the channel are provided to permit the supporting-arm to be more readily passed therethrough.

In the embodiment herein described. the arms ii are secured at the ends so! channel-members It so that ionizing-wires 84 can be secured to the tips of their wire-supporting portions, between and parallel to a pair of associated ground-electrod Arms 22 are secured to the central channel-m mber II with the hook 85 of each encompassing the central part of an ionizing-wire so as to position it and toprevent excessive vibration. Arms II are secured to the extreme ends of each channel-member for supporting an ionizing-wire 3' parallel to the associated channel and contiguous casing-trams side 2; the wire-supporting portion 28 of each of the arms 23 being bent in an angular relation to its anchoring portion so that an ionizing-wire 85 will, when properly energized, suitably discharge to the casing-frame side 2. Intermediate arms 24 are secured to intermediate points along the same channel-member for positioning and limiting vibration of the associated ionizing-wire 38.

A modified form of latching-groove or -hole is shown in Figs. 13 and 14. Inthis embodiment I the latching-holes are merely notched indentations in the channel-member, which do not extend completely through the bar, and can be easily nicked by a sharp elongated edge striking the central portion ll. Arc-part so presses against the notch-sides.

From the foregoing it is apparent that I have provided an ionizing structure which can be massproduced, diflerent channels being made duplicates of each other, except, when desired, for the holes in the central channel-member l3; and the anchoring-parts oi the various ionizing-wire supporting-arms being the same. In one particular embodiment, the arms were very strongly secured to the channel-members and required exceptional force to be dislodged from the latching grooves or holes. Fitting of the arc-parts into the latching grooves or holes also prevents sidewise twisting of the arms while the flexing of the arms firmly supports them with respect to movement in the plane oi the arc-part.

While I have described my invention in forms now preferred, itis obvious that other modifications and equivalents can be utilized in carrying out my invention. It is also obvious that the terms "hole" and groove are used broadly to indicate a complete perforation in the channelmember and also the equivalent of a notch or indentation in one side only of the channelmember, unless necessarily limited by additional context to one or the other.

I claim as my invention:

1. An ionizer structure for an electrical device of a class described, comprising the combination with a casing-frame and insulating means secured thereto; 0! a support-member supported in insulated relation to said casing-frame by said insulating means, said support-member including an angular member having a leg-portion, said leg-portion having a restraining opening having a boundary terminating at a point between a spaced edge of said leg-portion and the remaining portion of the angular member, said remainlng portion having a latching-hole and a restraining opening, and an ionizing-wire supporting arm having a wire-supporting portion and a springy anchoring-portion, said anchoring-portion comprising an arc-part adapted to be forced into the latching-hole and additional armparts extending from each end 0! said arc-part, each of said arm-parts being associated with a different one of said restraining openings, the unsprung transverse height of said anchoring-portion being larger than the corresponding distance of said assaess boundary to said remaining portion, so as to require forcible flexing of said supporting arm to lorce the arc-part into vsaid latching-hole for locking the arm in fixed position in said member by spring-force.

2. The structure of claim 1 characterized by said wire-supporting portion of said arm having a wire-fixing bent-part near an end thereof, the anchoring-portion being lengthwise at an angle to said wire-supporting portion.

v 3. The structure of 1w 1 characterized by said arm comprising spring steel, and said latchling-hole comprising a notched indentation."

An misled structure adapted especially for positioning an ionizing-wire, comprising an elongated transversely angular her-member having a transversely elongated latching-hole therein, an arm having means for locking association with said latching-hole, said arm having additional arm-parts extending from each side oi. said arm-parts, said restrag holes having shutment boundaries which are a mum transverse distance from said latching-means which is less than the corresponding mammum unsprung transverse distance along said arm-parts and detent means; said am heing fixed in position with respect to said her-member by sidewise twisting of the arm to cause the detent means to latch in said latching-means, the restrng openings restricting movement of said arm during twisting so that said arm is caused to x, whereby said detent means is forcibly pressed into cooperation with said latching-=means with said detent means he pressure reactions between said armmarts and the associated restraining holes.

6. Means for supporting a plurality of ionimngwires, comprising an elongated channel having a body-poxtion and spaced leg portions extend= ing therefrom, said body-portion having a pinrality of latching-holes spaced length-wise therealong, said channel including a pair of restraining openings associated with each latching-hole substantially on opposite sides thereof, at least one of each pair of said restraining openings extending for adistance along an ociated leg,

in a direction away from said bo-portion, but

not to the edge of such leg, in order to form an abutment side.

-'7. The means of i is 6 in 'whichsaid one restrng opening extends for a distance in said body-portion toward said latching-hole.

8. The structure of cl 5 characterized by an arc.