US2325765A - Rotation-symmetric reflector - Google Patents

Description

it g I invention relate to T arrangement for i a rotation which the focus this also involves varied supporting means ior the reflectors.

1 different dimensions.

i in cross-sectional .Application e ems-' symmetric" reflector designed toibe used iorthe reception-of electromagnetic oscillations pr ultrashort wave-length object ,of this invention:

is to provide a parabola type of reflector in reflecting surfaces.

smallnesfspf thebeam that'is, the' focus or concentration 'of the'radiationsent out. In the prior art supporting.meanscustomarily transmission or the Gartenmeister, Bergfeli Germanygjrested in the Alien-Property Q le fl x T can be varied togive difierenti The aperture of the parabola i must bechosen according tothe sharpness or of the reflector.

usedfor rotation symmetric reflectors it is ,nec-

1 I essary to replace the entire reflectorwhenevera 1 different width of sector is desired. Therefore, a

certain number of reflectorsare needed each having a convenientyapertural width or angle, ypes of construction and Now, this invention obviates the drawbacks 'inherentiin the grotationjsymmetric reflectors heretoforeused. L The invention creates and; discloses a uniform;and standard form of construction for reflectors ofthiskind. Thisconstruction is independent of the aperture desired in any iven case. and also.

rotation symmetric reflectors oi ispthat thesupporting means of A feature of this invention the reflector consist ofa plurality pica-axial "cylindrical rings of widening diameters and also a tum y-snowman REFLECTOR and tfie outer. edge extending; downward. The i a edges join the cylindrical ringsb'ysuch jmathvd fi eiw n eima Y "The active refiecting surface dmay consist'of a V suitably shaped metallic sheet or of. a wire grate or grid construction whichis placed into the sup porting means and may be secured thereto by any suitablemeans such as by smallangle clips. ,The, advantage of an arrangement of this invention is that the construction may be used independently of the apertural width or opening angle 13 All that .is necessary is to insert the requisite of flat rings b.

The ringsiare supportedin 'the rear by radial connecting struts or braces Ifaxial bearing means g; Recesses-c ascrimped' are indicated in the drawing uto lighten and!" strengthen the rings. 7 r

required for the transmission of short waves may be directly fitted into the rear r of the supporting structure of the reflector. provides for reflectors oi plurality offiat rings with increasing mean diarn-v eter which inter-connect. thevarious cylindrical i rings to provide: a rigid mechanical. union.

Another feature of'the invention is to reduce theweight of thes'upporting means byhaving' the various rings recessed or otherwisediminishedf I area. The edges of such Ereportions could be crimped or.

cesses or cut-away flanged, in order to reinforce the construction.

Still another feature of} the invention is to furtherstifl'en the. supporting structure for axial supporting or journaling of therotary reflector by providingradialstays or struts whereby the vari-. ous rings are inter-connected. i

An exemplified embodiment of the is illustrated in the drawing, in '7 section and'Fig; 2 an elevation of thejinvention, which Fig.1 is a of a rotation symmetric reflector, The reflecting surfaceis supported and adjusted by a plurality "of coaxially arranged cylindrical rings al, a2, a3, a4, a5 etcgand a plurality'of flat b3, b4, b5,fletc.,iwhich {connect the cylindrical.

larlyin all similar '35 rings bl, b2,

ringswith one another by crimping the edges which; have the inner edge extending np ward li i 'for the transmission length have to be focused.

portion of said rings, land Another advantageof the formal. construction 1' ere disclosed'is that by virtue of strength thus secured the devices andapparatus Another merit of the form of construction here :disclosed is that any light weight'metalmay ex describedin itsapplication to a reflector designed or reception of electromagultra-short length, it will. be

netic oscillations of understood that the. same idea may be used simi reflector which anykindof mechanical or electrical 0scillations or vibrations, no matterof what wave- What is claimed:

1. A reflector for electro-magnetic oscillations comprising a plurality of cylindrical rings coaxially arranged with respect to oneanother, a plurality of flat rings each one of which is interposed between the adjacent cylindrical rings, 'a metallie curved reflecting surfacelocated. at the frontal arranged with said rings to change: its curvature by changing the number of. rings secured thereto.

2; A reflector. for electro-magnetic oscillations 13 comprising: a central portion, a plurality of cy1indrical, rings surroundingsaid central portion and coaxially arranged 1 with respect to one another,

a plurality of flat rings each one of whichis interposed between the adjacent cylindrical rings, a metallic; curved reflecting surface located at. the'frontal portion of. said rings, and arranged a number of cylinder rings a and e and tosupport the if the mechanical or the reception arrangements in with'said rings to change its curvature by changing the number of rings secured thereto.

A reflector for ele tro -magnetic oscillations comprising a'plurality of cylindrical rings coaxially arrangedwithrespect toone-another, a pluralit of flat rings having extruded ends, each a metallic Wire grate curved refiecting surfacelocatedat the frontal portion 'of said rings, and arranged with said rings to comprisinga central portion, a support for said I reflector secured to said central portion; a plurality of cylindrical rings coaxially arranged with V respect to one another, a plurality of flat rings centcylindrical rings, a curved reflecting surface located at the frontal portion of said rings, and; v rearranged with said rings to change its curvature by changingthe number of; rings secured thereto. 10" change, its curvature'by changing the number of ,rings secured thereto; 7

t one ofwhich is interposed between the adjacent V cylindrical 4. A short wave electro -magnet'ic 'rotationsymmetric reflector comprising alpluralityvo fi cyllne dri c al rings of increasing" diameterr'c'oaxially ar each oneof which is interposed between the adj a 6. A shortwave electro-magnetic rotation symmetric reflector comprising a plurality of cylindrical ri-ngs-of increasing diameter coaxially are 5 ranged with respect to one another, a plurality offlatringsofsincreasing diameter each one of ranged with respect to one another, a plurality I of flat rings of increasing diameter each one 1 of which is interposed between the adjacent eye liridrical rings, ametallic curved reflecting surfacelocated at-the iron-tel portion. of said. rings, and

arranges with saidjrings to change its curvature which is fn terposed between the adjacent cylindrical;ri-ngs,.a curved metallic reflecting surface located at: the frontal portion of said rings and by changing the number oi, rings securedtheretc; r j 5.. Av refiector'f or 'electrov-magnetic, oscillations arranged with said rings to change its curvature loylchanging' the numherfo'i rings secured thereto anda pluralityof bracesradially mounted atthc' rear. ci saidv rings. t

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