US1761082A - Spark-gap mechanism - Google Patents

Description

lJune 3, 1930. '.1. G. H. LIEBEI. ET AL I SPARK GAP MEGHANISM Filed July 15. 1928 -2 sh'eats-:amava 1 illmllllllll!` iii . Hill I June 3, 1930. J. G. H. LIEBEL ET Al. 1,761,082..

SPARK GAPv MECHANISM Filed July 15, 1928 2 Sheets-Sheet -2 29 177 .5 :7 I. 3mm/co W/MWM Strunz/n;

l5 f bermovable relativelyl'tothe-support'for'the l Patented June 3, 19730 g 1,761,0s2f

JQHNL G.Y H; LIEBELAND -EDWIN s. FLAnsHmM-gorfCNGINNATI;01110;AssIGNeRs Tof 'JJ-HE LIEBaL-FLABSHEIM complaisance eINcrNNML oHioiA-KcoaroaA'rIoNeoa omo SPARK-GAPMECHANISMQ: y g p I Applicationiiieauiy:` 1,3,

Thisinventionfrelates to spa-rkgap mecha# nisms :of the v type particularly adapted for use in high frequency electro-therapeutic apparatus. Y Y v Infspark gap mechanisms `of this type it is desirable to:-have-a plurality'- of'individual v gaps-connecte'd-fin series, each gap Yset rela- Y tively closely ratherthan the singlel gap havingitselectrodes set a r-large I distance Y apart( y* Itfis further'desirable to have theindi vidual gaps ofthe series setrelat'ivelyy uniformlyg andi ift; has 'therefore4 been `found eX- pedient'toimount agpluralityfo spark elec Y tro'des upon-astationarymember fand' a pluralityiole` opposing electrodes upona-v memirst seto'ffelectrodes: In'thisway the series oigaps is unitarilyadjustable ;l access tothe 'terminationl thatV unexpected 'eilieiency-- is at'-k gaps is easilyfhadandcleaning can :bef read-- ily accomplished.v e Y f The object of the invention is to provide simpleandic-onvenientspark gap mechanism-' adapted in-the properenvironmenttoproduce a smooth and steady high "frequency, currenth 'This invention is predicateduponthe de,-

taine'dby shieldingA the gaps from one' another byl members opaque to fultravioletf radiation- Ultra-violet radiatien- 'has an' ionizingl eect Yupon l the atmosphere which@ quickly with thejresultthatfthelproper andf due poWer is not'deliveredlby the instrument- WGGIl-Saidf gaps to'inhibitjultraevioletradiay tion-from one to another. Y f

preferred embodimento this invention is' illustratedilin the accompanying? drawings which 'discloseithe" sparl' electrodes andasseciated radiator plates rmounted fer:V facileadf justmentfandcleaning'yetprotectedfrom vo'rre f rangementof the' shield.

192:3'.l seriai'Ne. 292,509:y n

anothers influence by appropriately disposedl' Y shields. Y g Y j t mechanis Figure 4' is X a sectional'I vieWJalen on' line Figure l, showing` the fmounting-offfa: 60' set ofelectrodes" 1 y Figure 5 i is a lsectional vieW-*ta'lentor -lineyj- V 5 6,V Figure 4t, urtherdetailing the*muntl-fI ing of the electrodestfl:

`Figure 6 is avievv illustratihg'- the" shield c5 orcuttingdovvn thera'diationof the ulti1 Y vio'letrays fromf-one Ito another of the gaps:

Figure 7- is asectional'vievv; takenonrline Y 7 7, Figure', further detailingthe- 'a'r' Thev spark gap comprises; a rbasey 1 Whichj has two side standardsfQ yand v3IV secured;- tb 'iti' by L members" 4@ attachedVVE tof 'the' base? mehr-"9 berl 'by means ofs'crews'- andtothe side standards Y bly 'meansof! 'screws' '6 andfnutsj 75"v Theseside-Standards aret placed'1opposite te? i each"` other sof that theggapwbars may4 be' mountedb'etweenthemk- Y I stationary bar-'85 inadeof glass erf-some*- oth-er insulating materialh is mountedbetween-im these side standardsr'and i3ffbyme"an*s'Q-'tvyo 1 brackets v9,*f'joneof' which extends inwardly from each side standardfa'nd clampingrir are secured t0 'said' brackets byn'uts' 11L dis` 85's posed; 'on screws 12 vwhich `pass through' the.; endsf of the'clamping rings and thevr brackets."- Y Y lThe movable gap bar? 13` is placedbelovvthestationary: gap bar-as` disclosed; and fisffpro-H Y vided Withringsll atp'itl'siend's which-V are se- 9e cured'tobrackets-*1,5by means"ofjnu-ts16-dis=y Y posed on xscrews 17 i' which1 pass through the: ends of the' :rings and; thebracket; 1 "'f 'Betweene brackets; 9 and l5# extendffco'iled: springs 18 secured at their ends through eyelets :disp 'o'sed '5 in theends' of s'crews l2'a`n'd pins- 19"Whicli.. extend: throughv thefbrackets T15. f e f f The brackets l5 aresecured to slide barsQOf toWardEtheirmi'ddles'-, the-lovver'ends'foi these slidebars-being slotted; Vsaid;slotsjShaving en- "reo , ards.

oted a nut 24: into which is screwed one end of an adjustment screw 25. rllhis adjustment screw 25 is provided with a knurled end 26 and a shoulder 27 bearing downwardly.

against a horizontal flange 28a as a part of a standard 28 attachedv to the base. Consequently, rotation of this adjustment screw swings the yoke, moves the slide bars and variesthe'space between the stationary and movable gap bars. The raising of this adjustment screw 25 upwardly axially tends to separate the gap bars rapidly against the tension of coiled springs 18 and facilitates the cleaning of the mechanism.

Toward one another from both the stationary and movable gap vbars extend a plurality of radiator plates 29, adapted to support the spark electrodes 30 themselves. As disclosed, the radiator plates are grouped in sets of four plates disposed parallel to each other and spaced slightly. The plates are secured together in this spaced relationshipby posts 31 and collars 32 placed on said posts between plates. On the outer ends ofthe posts are disposed the spark electrodes. Each set of radiator plates isheld to its supporting gap bar by means of a ring 33 disposed about the bar and screwed, welded or otherwise secured to the back plate of the set. j

As disclosed, the stationary gap bar is provided with ve sets of radiator plates, said sets slightly spaced from each other horizontally, each set provided with two spark electrodes, one at each side of the forward radiator plate, all of said spark electrodes substantially in alignment with each other.

The movable Agap bar, as disclosed, is provided with four sets of radiator plates similar to those carried by the stationary gap bar.V

TheseV sets are disposed in staggered relationship to the sets carried by the stationaryV gap bar so that the spark electrodes carried by any given set of radiator plates are disposed opposite to the spark electrodes of two different sets carried by the opposite gap bar.

The movable gap bar is also provided with two sets of small radiator plates 34 disposed adjacent to the ends of the gap bar. These sets also carry spark electrodes placed opposite to the end spark electrodes carried by the sets of plates supported bythe stationary gapbar. This structure provides a series of ten spark gaps disposed in substantially the same plane. Y n

vEach set of radiator plates (except the sets 34) carries a shield 35 which extends At the end of this member 23 is pivvtoward the opposing gap bar. Each shield is disposed intermediate the two spark electrodes carried by the plate so as to shield each gap from the radiation of t-he adjacent gaps. As disclosed, these shields are secured to the innermost radiator plates by means such as Welding, riveting, etc.

Figure 7 discloses shields comprising tubes 36 of glass or other insulating material impervious or `opaque to ultra-violet radiation placed over the opposing spark electrodes and thus to inhibit radiation of ultraviolet light from one gap to another.

In use the radiator plates 34 are connected into the desired circuit which disposes all ten of said gaps in said circuit in series with one another. The spark gap of this invention is therefore simple in structure, easy to adjust or clean, and adapted to provide out-put current of smooth, steady and high voltage by virtue of the members which insulate the gaps from one another as to ultraviolet radiation. Y

Having described our invention, we claim:

l. A spark gap mechanism particularly adapted for use in high frequency electrotherapeutic instruments and theV like, said mechanism, comprising, a stationary member, a member movable in relation thereto, a plurality of spark electrodes supported by the stationary member, a Vplurality of opposing spark electrodes supported by the movable member constituting adjustable spark gaps in combination with the spark electrodes on the stationary member, said gaps defined by substantially the same planes and shields disposed between said gaps to inhibit the radiation of ultra-violet light from one to another.

2. A spark gap mechanism particularly adapted foruse in high frequency electrotherapeutic instruments and the like, said mechanism, comprising, astationary member, a member movable in relation thereto,

- a plurality of radiator plates carried by each of said members, a plurality of spark electrodes attached to said radiator plates and disposed in opposing relationship to each other to constitute a series of spark gaps, and shield members disposed between each 0f said gaps to inhibit radiation of ultraviolet light from one to another.

3. A spark gap mechanism vparticularly adapted for use in high frequency electrotherapeutic instruments and the like, said mechanism, comprising, a stationary vsupporting member and a member movable relatively thereto, a plurality of radiator plates grouped in a series of sets, each set, comprising, a plurality ofy parallel spaced plates, some of said sets supported by said stationable relatively thereto, the sets carried-by the stationary member staggered in relat1on ,to the sets carried by the movable member, some by said member movv each set of plates, said spark electrodes so disposed that the two electrodes of any given set are in opposing relationship to member, a plurality of vspark electrodes carried by said radiator plates', two for electrodes of two diierent sets supported by the opposite member, and shields ydisposed between the gaps formed by said opposing electrodes to prevent ultra-violet radiation from one gap to another.

4. A spark gap mechanism particularly adapted for use in high frequency electrotherapeutio instruments and the like, oomprising, a plurality of spa-rk electrodes disposed in opposing pairs to constitute a series of gaps defined by substantially the same planes, a series of radiator plates disposed about said spark electrodes, and members opaque to ultra-violet light supported by said radiator plates and extending therefrom to positions between the gaps `to inhibit the radiation from one gap to another.

In witness whereof, we hereunto subscribev ournames.

JOHN Gr. H. yLIEBEL. EDWIN SQFLARSHEIM.

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