DE1514402A1 - Touch-safe ionizing air nozzle - Google Patents

Description

PATENT ADVERTISER ■ '' '' '" HELMUT GÖRTZ

Q.? -kiurt a. Main

February 12, 1965 Gzr / goe

ÖIMCO COMPANY., Inc., Lansdale / Pa., Ü.S.A. 1514402

Touch-safe Itoonisierunga air nozzle

The invention relates to suppressors and in particular to a touch-safe ionizing air nozzle, with a jet ionized air directed at a specific zone or surface is used to blow away particles adhering to surfaces and at the same time to neutralize the particles and surfaces.

An ionizing air nozzle has been described in which a high voltage alternator is connected directly to a needle and the nozzle and the needle is coaxial within the DUsp but is electrically isolated therefrom. An air stream from a compressed air line is passed through the nozzle parallel to the needle and is ionized as it passes through the cone-shaped high-voltage field. As the air flow increases the ionization field, the nozzle provides a finely increased area of ionized air. This is not only effective for removing particles that adhere to a surface as a result of electrostatic attraction, but also for neutralizing the particle charges and / or the surfaces and canceling out the forces which the particles ( want to pull back to the surfaces).

As in previous ionizing air jet designs the high voltage was directly connected to the needle, restrictions and precautions were required in its use. First there was a possibility that the staff, which Operated the device, accidentally touched the excited needle, for example with your finger, and received an electric shock as a result. Furthermore, there was always the likelihood of a spark or an electric arc as a result of a dielectric Breakthrough in the air gap between the IT needle tip and the nozzle

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could occur. 'As a result of the risk of explosion caused by a due to such sparks, the use of the earlier constructions in a flammable environment was not permitted After all, it was because of the direct application of the high voltage the criticism there is a noticeable corona glow. In case the earlier devices for the neutralization of sensitive photographic Films were used, it was necessary to arrange a diaphragm or a shield around the nozzle in order to do so to turn off exposure of the film by corona glow.

It is therefore an object of the invention to provide a touch-safe "To create ionization air nozzle.

Another object of the invention is to provide an ionizing air nozzle. which in a flammable environment Can be used.

Furthermore, an explosion-proof and touch-proof Ionizing air nozzle can be created that is able to neutralize and clean a sensitive film without to cause an exposure even though a light shield is missing »

Another object of the invention is to provide a explosion-proof, touch-proof ionizing air nozzle, which can be built into both a blowgun and a fixed air line.

Furthermore, a contact-safe, static suppressor is to be created which is to be arranged away from the parts to be neutralized. ·

The facility should be easily and economically divisible, it should have a robust structure and be highly effective.

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The invention "relates to the details of construction so ^ ie the combination of parts, which from the following description can be understood in conjunction with the accompanying drawings.

It shows:

Figure 1 i

a perspective of a safe to touch ionization blowgun according to the invention;

Figure 2:

a section along lines 2-2 of Figure 1; |

Figure. 3l

the touch-safe ionization blowgun in an extended Depiction;

Figure 4:

the perspective of a touch-safe ionizing air nozzle

according to the invention; *

Figure *>;

a section along the lines 5-5 of Figure 4 »

Ix ^ ar 6; (

■> ί ° ν non-contact ionization air nozzle in mutually

Referring to the drawings, in which like numerals refer to the same parts, there is shown in Figures 1, 2 and 3 a touch-safe ionization blowgun having a barrel designated A, an end-of-barrel nozzle B Cable C extending coaxially within the barrel, a sheath D encapsulating the end of the cable, a conductive one arranged in a ring around the sheath

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Sleeve E, a pipe F concentric to the sleeve, which is inserted into Lengthways the cable inside the barrel carries and a conductive Has needle tip G, which extends from the end of the sleeve through the tube and projects coaxially into the nozzle mouth. .

The housing A is a one-piece molded metal casting, preferably made of aluminum, the barrel 12 extending substantially at right angles to the handle 14 in the manner of a pistol. The barrel 12 has a longitudinal bore 16, which at one end with • provided with an internal thread and an internal neck part 18

with a threaded opening 20 which communicates with the bore * stands »A hook 22 is attached to the outside of the barrel 12, around the To be able to hang up the pistol when it is not in use.

The handle 14 has a bore 24 which, from the handle, extends to a centrally arranged chamber 26 through which a spring normally closed valve H is screwed into the chamber 26 'and fastened there with the aid of a cap screw 28. One. Socket 30 at the lower end of the bore 20 is connected to a hose, not shown, which is in communication with a compressed air source. An inner one. Channel 32 connects the chamber 26 via the valve, H with the longitudinal bore 16 in the barrel. The valve H Sf-Il) Dt is a conventional, normally closed, pneumatic 'genetic stopcock, which has a within a Stusseis 36. "reciprocable piston 34 includes · As shown in Figures 2 and 3 is shown the spring 38 ,, drüokt the piston 34 from left to right, so that the head 34a rests normally on the sealing ring 40 and closes its longitudinal opening and that of the plunger 36. A cap 42 is screwed into the chamber 26 within a correspondingly threaded opening and seals it off with the aid of the sealing ring 44. At the same time, the cap carries the entire valve arrangement H.

An actuation pin 34b cast on the piston 34 is sufficient a stuffing box in the cap and can through a Drüoker 46

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be moved. The pusher 46 is held rotatably on a dowel 48 which is pressed into a projection on the bottom of the barrel 12 is. If the pusher 46 is withdrawn by pinger pressure, the piston 34 shifts so that a head part 34a does not rests longer on the sealing ring 40. Accordingly, the Compressed air from the bore 24 through the plunger opening 36 in the Chamber 26 in the channel 32, whereupon aie flows out through the barrel bore .

A second passage 53 is in the rear part of the handle 14 and extends upward into a recess 54 on the rear of the barrel. The cable 0 runs through the passage 52 into the recess 54 and then essentially at right angles through a tubular part 56 seen with an external thread ν, which, is screwed into the internally threaded neck 18. The recess 54 facilitates the right-angled turning dee Bucket 0 and its introduction into the barrel bore 16. A cover plate 58 closes the recess 54 after the cable is in the barrel 12 is inserted »cap screws 60 hold the cover plate 58 fixed.

The nozzle B is also a metal part, for example made of aluminum and generally tubular in shape, it has a konis-lis .jpifcze 60 with an opening 62 ono a circular Washer 64 sits in nozzle B near the threaded end and is held in place by cap screws 66 · The Disk 64 is made of an insulating plastic with a high dielectric constant, for example an aoetal resin polymerized, crystalline formaldehyde, which is sold under the trade name "Delrin". / see also FIG. 2 leaves, the surface of the disc 64 at the hole 65 is concave rounded, and a plurality of circumferentially arranged openings 68 durohead the sole plate to lighten the air Allow passage from the barrel · ./ as described later

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will be 'i8t' there will also be an axial bore 70, which Purely holding the needle G is used · Dr8 threaded end the nozzle B is screwed into the corresponding internal thread at the end of the barrel 12 and held in place by head screws 72. Openings 74 offset on the circumference extend directly behind the beveled tip through the cylindrical wall, the nozzle B. These openings 74 allow atmospheric, see air being drawn into the nozzle as soon as compressed air enters the barrel from the line. In this way a vacuum can be created avoid when the compressed air duroh the front parts

»The nozzle flows * Εε is desirable that the air through the ■ Nozzle B flows in the longitudinal direction parallel to the needle hole G so that it helps to support the high-voltage field which runs conically from the needle tip to the front tip of the opening 62. In the latter respect, an insulating sleeve 76 is glued inside the opening 62, whereby the tip of the needle G is shielded from the conductive surface of the opening, apart from the foremost point of the nozzle tip. on In such a way it is possible that the high voltage potential, which is applied to the needle G and the gun housing A and, accordingly, the nozzle B, has a conical shape from the needle point to the circumference of the opening 62 "

The cable 0 preferably consists of a multiple twisted copper wire 80, which is covered with a polyethylene sheath 80, followed by a polyvinyl resin layer 84. A metallic air shield 86 is braided around the polyvinyl layer 84 and encapsulated in an outer insulating layer 88, which in turn, for example, a pole ^ vinyl polymer or co-polymer _o

As is apparent from Figure 2, the layer 88 and the screen are drawn off the Kabele 86 so that the front end can be pulled through the pipe section 56 and the cable approximately about 80 i "dee barrel occupies the 12th A cap 90 made of polyethylene. has melted over the end of the cable C in order to

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put lead wire on top to completely cover it. When doing so, stripping off the outer shell and the braided sole 86 is accomplished, a short, exposed piece of the screen 86 lies in the recess 54. A zaoken-shaped, metallic one Terminal 92 is with good electrical contact around the exposed Part of the screen 86 placed. A ground line 94 stands with the terminal 92 in connection and has a connection eyelet at the free end 92, which is attached to the cover plate 58 with the aid of a screw 98 is attached.

The bare end of the cable 0, which goes through the Hohrsttick | 56 extends into the bore 16 of the barrel, lies within the insulating layer D until the polyethylene cap 90 reaches the end; the layer comes across. The layer D is also made of a plastic with a high dielectric constant, for example from "DeIrin" and has a cylindrical shape with a inner longitudinal bore, which is adapted to the outer diameter of the bare cable end.

The conductive sleeve E consists of a thin-walled, stainless steel tube which has an end wall and an axial bore 100. The inner diameter of the sleeve E slidably receives the outer cylindrical wall of the layer D. When the insulating layer D is inserted into the conductive sleeve E, both, | substantially equally extended in the longitudinal direction and arranged concentrically around the cable C-. However, no part of the remaining sleeve E is in direct electrical contact with the wire Ιιά the pipe section 56 made of the insulating "Delrin" plastic, there is also no direct electrical contact between the conductive sleeve E and the grounding shield 86 or its line * 94 «

Finally, the spacer tube F surrounds the conductive sleeve E and insulates the latter from the barrel 12. The spacer tube F iet also made of a high-quality dielectric plastic, for example from "Delrin" and has a cylindrical shape

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shape with an outer wall 102, which is slightly smaller in diameter than the barrel bore 16, so that an air gap is created · The annular gap between the pipe? and the circumference of the barrel bore 16 allows the compressed air to flow through the gun barrel. The inner wall of the Abetanderrohres F is threaded at the rear end and is screwed onto the external thread of the Rohrstüokes 56,% if it abuts the inner neck .18 »The inner diameter The spacer tube F fits around the outer diameter of the conductive sleeve E _0. An end wall 104 of the tube has an axial opening 106 which has a post which receives the shaft of the needle G and its hexagon nut. In addition, the end wall 104 has flattened areas 108 which can be grasped by a suitable socket wrench in order to facilitate the screwing of the spacer tube F onto the tube section 56 «,

The needle G is made of conductive material, for example stainless steel and contains a tip 110 with a high polish, a threaded socket 112 and a central, simultaneously formed nut 114 o The socket 112 is passed through the axial opening 106 of the spacer tube and into the bore 100 of the conductive sleeve E screwed. The nut 114 is ^v rotated within the sinking until the end wall of the sleeve E

against the inner Stimwandund 104 of the spacer tube is overall g. The conductive sleeve E is now firmly arranged within the tube, so that the latter holds the various elements at a safe distance with respect to the barrel 12 as soon as it is screwed onto the tube section 56. Finally, the nozzle B is screwed tight within the barrel 12, the axial bore 70 of the disk 64 being pushed over the needle tip 110. -

The touch-safe ionizing air gun described above is operated in the usual manner by using a high voltage generator, not shown, of approximately 5000 to 15 OOP VAC to the conductor 80 and the earthing terminal 86 ad input The cable 0 is connected. Please note that the needle G

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Capacitively coupled to the conductor 80 via the conductive layer E. is. There is no direct contact between the needle G and the conductive sleeve E, neither with the conductor 80 nor with the housing A and the grounding shield 86 directly connected to it. The capacity between of the sleeve E and the central conductor 80 is approximately 7 to 10 microjäicrofarads.

The amount of capacitive coupling between the sleeve E and the cable conductor 80 is chosen so that honest surge or arcing at the needle tip 110 can be avoided while at the same time a high degree of air ionization within the gap between the needle tip and the circumference of the nozzle opening 62 is achieved will. The insulating ring 76 completely encloses the tip of the needle G so that the annular surface of the opening 62 lies in front of the needle tip 110. Accordingly, the potential between the needle tip 110 and the nozzle B generates a ^J conical PEiD. This conical field is intensified by the air flow as soon as it flows through the nozzle by depressing the trigger 46 a film could be exposed or an explosive environment could be ignited if the pistol is used under such conditions , explosion-proof, non-disguising a film · ionization-gaspietol · «

In Figures 4, 5 and 6, another Ausführungsfona the invention is shown, which zunäohat differs in 'that it relates to a, berührungesiohere, ionization air nozzle, having no associated herewith Drüoker · Further, there are in the following Hinaioht differs The AuefUhrungefoxs < Contains an insulating case · At, a «on the front side of the nozzle B1, a KaUX 01, we loh ·· the housing * ue * luy '

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penetrates the nozzle, a conductive sleeve E1, which encloses the cable within the housing, a needle 01, which is coaxial is arranged inside the nozzle and mounted in the housing so that it rests against the conductive sleeve B1 transversely to the axis thereof and lines J, which are used to introduce compressed air into the housing, so that it passes through the nozzle in the longitudinal direction parallel to the needle.

The housing Allst molded of a dielectrically high-grade plastic, .beispielsweise of polystyrene and has a legal ψ w'.rkllge block shape, although any other shape would eeln as well. The front surface of the blook has an externally threaded cylindrical projection 120 which is also cast in one piece "A bore 122 in which the cable 01 lies" extends transversely through the blook A1. A stepped bore 124 extends calibration of a depression 126 in the projection 120 to the bore 122. Sine internally threaded opening 128 into which a Rohrstüok 130 of the line J is screwed, coaxial for bore 124 and spatially separated from the bore 122. Luftdurohgänge 132 extend through block A1 from counterbore 126 to inlet port 128, and these passages are laterally offset from transverse bore 122 to avoid any communication.

The nozzle B1 is generally similar to the nozzle B previously described, but its outer 64 is now replaced by the protrusion 120 which forms part of the block A1. The nozzle B1 can be made of stainless steel and have a hexagonal body 134 which is followed by an elongated, tapered sleeve 136. The interior space 138 merges into an annular opening 140 at the nozzle plate. A cylindrical ring 142 of insulating material lit in the opening 140 adhered to allow the tip of G1 j no bare conductor metal of the extent · "see" · A plurality of distributed to peripheral openings 144 eretreoken calibration duroh the Builiteil the Hülae 136 to the atxömun " de », Druokluft through the

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To simplify nozzle B1 without creating a turbulence through a vacuum « It could be seen that the XKlee B1 is screwed to the projection 130 and can be tightened with the aid of a sole tackle which engages the hexagonal body 134.

The cable 01 is common and general in every respect comparable to the stripped part of the cable C, weloheβ inside the Laufee 12 the air pistol was introduced. In the In the present embodiment, the braiding and the outer covering are omitted, and the cable 01 contains an inner one twisted conductor, a polyethylene sleeve and the usual Vin $ r « outer coating.

The conductive sleeve El of this example is simply tubular Element of lower hardness than the sleeve E and can be made of brass, since this material has good conductivity and can be notched by the needle 01 as soon as the latter is pressed against it. The inner diameter of the sleeve E1 can slide over the cable 01, and the AuBendurohmesger should Slidably fit into the transverse bore 122.

The needle G1 is essentially identical to the needle G and has an elongated tip 146, a threaded shaft 148 and a nut 150. In the present pallet, however öaa Shank end 148 conical at 152 so that a point eutiitoht, which presses into the sleeve E1. As soon as the cable 01 rait is inserted into the transverse bore 122 via the conductive sleeve E1, the needle shaft 148 is screwed into the bore 124 until the tip 152 presses against the sleeve «As a result of the screwing in the nut 150, the tip 152 is pressed lightly into the sleeve Ξ1, which not only provides a fixation, but also a good one electrical contact can be achieved. The needle tip 146 is now axially separated from the end of the nozzle or the opening tip, as is Figure 5 shows «

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It should be noted that no part of the needle G1 or the sleeve E1 is in direct electrical contact with the inner, conductive one Core 80 owns. The coupling between the sleeve E1 and the high voltage at the core 80 is purely capacitive. Sin copper wire or one Earth wire 154 is clamped behind nozzle B1 as soon as it is screwed onto the protrusion, and the opposite end « the line 154 is attached to the pipe section 130. V / ie from. Pigur 4 results, the pipe section 130 is connected to a source of compressed air connected by means of lines J. The conduits J are in the form of any metallic pipe of a shape that fits for the plant. According to FIG. 4, a large number of air nozzles are connected to a general air line J, where Ub = - Borrowed connections 156 are used, which on the pipe 158 are connected. A high voltage / alternating current generator, not shown is connected to the cable conductor 80 and the earth, i.e. the J lines.

It should be noted that each nozzle with the cable ladder 80 over the associated sleeve E1 is capacitively coupled, the needles GT ionize the air which flows through the nozzles B 1 without sparks, arcs or corona discharges occur at the tips.

Although the invention has been described in great detail, the description is intended to be illustrative and not limiting to be understood as the invention in different terms, e can be extended without deviating from its idea au;

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Claims (1)

- 13 - Patent claims Touch-safe | nization air nozzle, thereby Marks that a tubular, conductive Housing is present, which has a longitudinal bore and a tapered part which opens into an annular opening that one The insulating washer lies within the hole, the air passage has that a conductive needle is arranged in an axial opening of the disk coaxially to the said bore and electrically is isolated from the housing that the needle has a point which is directed towards the end of the housing and inside the opening ends that a tubular insulating ring is arranged inside the opening around the needle tip, so that a bare conductive part of the opening in the longitudinal direction opposite the needle tip is separated that an insulating housing provided with a bore is connected to the nozzle, that a cable with one a sheathed central conductor that a conductive sleeve is mounted in the bore of the insulating housing and the vicinity of the cable slidably enclosing that the needle is in electrical contact with the conductive sleeve, that means are available, which are used for the introduction of compressed air, which is parallel to the needle and out through the nozzle in the longitudinal direction ilui. Opening flows that means for applying a high voltage .ΐννΐ'.ε j per η the conductor and the conductive housing are present, whereby the conductive sleeve and the needle with the conductor is capacitively coupled and creates an ionized air field conically extends from the needle point towards the front part of the opening, so that the air without sparks, arcing or corona " glow flows between the needle tip and the housing. BATH ORIGINAL 909-824 / 0181 -H- Contact ionizing air gun characterized in that a conductive housing has a barrel and a handle and the barrel has a longitudinal bore and a nozzle at the end of the bore, that the nozzle encloses a generally cylindrical space which has a stepped, annular opening, that an insulating washer is arranged in the seam, which has an axial opening and a plurality of longitudinally aligned air passages, that a cable has a central conductor with a sheath, one end of the cable running through a channel of the handle and extending into said bore, that an annular sheath at the end of the cable lies within the bore, that an annular, conductive sleeve surrounds the sheath, that a tube has a cylindrical wall and an axially open end wall and sits in the longitudinal bore, that the tube between the conductive sleeve and the Run lies that a conductive needle has a shaft and a point e, wherein the shaft is attached to the end of the conductive sleeve, the needle tip passes through the open end wall of the tube and ends in the nozzle opening, that means are present for the introduction of compressed air which passes through the disc passages and out of the nozzle opening in the longitudinal direction flows parallel to the needle that means are provided for the application of a high voltage between the conductor and the conductive housing, whereby the conductive sleeve and the needle are capacitively coupled to the conductor and an ionizing air field is conical from the E ^ delspitae sum the front part of the opening extends so that the air flows between the needle tip and the nozzle without sparking, arcing or corona glow _o 909824/0181 Air pistol according to claim 2, characterized in that that an insulating ring is arranged spatially separated within the opening around the needle tip. Air pistol according to claim 2 _f, characterized in that the cable contains a braiding which is at ground potential, so that the ground terminal of the high voltage is connected to the housing Touch-safe nozzle according to claim!, Characterized in f labeled that a conductive needle in the Opening of an insulating Seheibe is held and in electrical Is in contact with a conductive sleeve and has a tip which ends in the opening coaxially with it « Nozzle according to claim 5, characterized in that that a Hing is mounted and spatially within the mentioned opening is separated from the tip of the needle " .909824 / 0181 Blank page