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50 



Brustmikrophon 



-punkt focus, focal point, -punnt, 

 vorderer first focal point. 

 -schwindung shrinkage in firing 

 (cer.). -Spannung constant glow 

 potential (is slightly lower than 

 firing or striking p.); normal 

 running p. (of glow tube, etc.). 

 -Spiegel reflector sheet, -strahl- 

 hartung flame hardening, -weite 

 focal distance, f. length, con- 

 vergence d. -weite, hintere back 

 focal length, -weite und Bild- 

 grösse, Linse für veränderliche 

 zooming lens for variable focus 

 and variable magnification, 

 "vario-objective", zoom lens. 



Brennweitenmesser focometer. 



Drennweitige Linse, kurz- short- 

 focus lens, lang- long-focus lens. 



Brett, Misch- mixing panel, moni- 

 toring p. Objektiv- lens panel, 

 objective board. Schall- baffle 

 (board); sounding b. Verst'ärker- 

 amplifier rack, a. panel. 



Brillanz (akustische Wiedergabe) 

 "bounce" (in sound reproduction). 



Brille, Zwei stärken- bifocal spec- 

 tacles. 



Brillengläser, durchbogene meniscus 

 spectacle glasses. -, punktuell 

 abbildende point-focal glasses. 



Brisanz shattering power. 



Br i stol karten Bristol board. 



brockel ig brittle, friable, crumbly, 

 fragile. 



brodeln boiling noise. 



Brom-ö'ldruckpapier bromoil print- 

 ing paper, -silberpositiv posi- 

 tive in silver bromide, -zahl 

 bromine number. 



Brown 'sehe Bewegung Brownian move- 

 ment. 



Brown Zungentelephon Brown reed- 

 type telephone receiver. 



Bruch break, breakage, fracture, 

 rupture, failure, fraction, frag- 

 ment; scrap, waste. 



Bruch, Längen- longitudinal frac- 

 ture. Vertrauens- breach of 

 confidence. 



Bruch-dehnung total extension or 

 elongation (to fracture), break- 

 ing tension, stretch (of paper). 

 -festigkeit ultimate strength. 

 -fläche surface of fracture. 



brüchig brittle, short, friable, 

 fragile, cracky. 



Brüchigkeit, Beiz- acid brittleness. 



Bruch-methode, Ketten- method of 

 infinite continued fractions 

 (math.), -platten bursting disks. 

 -punkt brittle point (of glass). 

 -Spannung ultimate stress, break- 

 ing s. -stücke fission products, 

 fragments, fracture or rupture 

 pieces, -teil fraction, fraction- 

 al part, aliquot part, -versuch. 

 Rot- hot breaking test. 



Brücke bridge, platform; rider 

 (piano). 



Brücke, Beleuchtungs- traveling 

 light crane. Kapazitats- capaci- 

 tance bridge, Wien b. Querlei tungs- 

 transconductance bridge. Ther- 

 mokreuz- thermo-couple or thermo- 

 junction, thermal cross. Ver- 

 bal tnisarme der ratio arms of 

 bridge. Widerstands- resistance 

 bridge, Wheatstone b. 



Brucken-ausgl ei chstrom bridge 

 balancing current, -gl eichgewicht 

 bridge balance. -H-Schal tung, 

 Entzerrungskette mit H-type at- 

 tenuator network (balanced). 

 -Scheitel bridge apex. -T- 

 Schaltung, Entzerrungskette mit 

 T-type attenuation network (un- 

 balanced). -Übertrager dif- 

 ferential transformer, -verhalt- 

 nisarrae ratio arms of bridge. 



Brumm-kasten bass keys. -Spannung 

 hum potential, ripple potential. 

 -spur, -streifen buzz track; hum 

 (broad bands on screen of c.-r. 

 tube), -tastenfeder spring for 

 bass keys (accordion). -ton, 

 Netz- motor boating (of a.c), 

 a.c. pickup. 



Brust-fernsprecher head and chest 

 set. -mikrophon breastplate 

 microphone. 



