prel ten 



217 



Probe, Ri sshärte- 



prellen (cf prallen) toss, make to 

 rebound, thump or click (key), 

 chatter, reflect. 



prellfrel free from thumping or click 

 (in key operation). 



Prellkraft resiliency. 



Press-bernstein ambroid, -bodenröhre 

 loctal base tube, -druck ram 

 pressure (in pressfits). 



presse, Fach- technical press, t. 

 literature, professional men's 

 press. Klebe- blooper, splicer 

 (for film), pr'äge- screw press. 

 Zieh- (cf Tiefzleh-) drop (forge) 

 press (for drawing and shaping 

 articles from sheet material). 



pressen press, compress, stamp, mold 

 (under pressure). 



Presser compressor (in volume-range 

 control). 



Press-form pressure mold. 

 -gasschalter (cross) airblast 

 switch, -körper,-! ing pressed 

 object or article, blank after 

 pressure application or molding. 

 -1 uftlautsprecher compressed-air 

 loudspeaker, pneumatic 1. (with- 

 out diaphragm), -luft schal ter 

 (cross) airblast switch (simiJar 

 to gas b. s. ) -masse fictile 

 substance, moldable material, 

 plastic m., synthetic, (thermo-) 

 plastic, -matrize, negative nega- 

 tive stamper (phonograph record), 

 -platten pressings (phonograph 

 record disks), -prozess pressure- 

 shaping, molding or fashioning 

 method, -sitz press-fit, force or 

 driving f. -spahn glazed cardboard, 

 press pan insulation material, press- 

 board. -Stempel press ram. -stock 

 stamper, die (built up frcan mother 

 record, in phonograph record manu- 

 facture), -stoff plastic, moldable 

 or fictile material, 



Pr imär-abstimmung pre-selector means, 

 -empfang single-circuit reception. 



Prinzip geringsten Zwanges principle 

 of least strain or resistance. 



Pr inzip, Ausschl iessungs- exclusion 

 principle (formerly Pauli 's 



equivalence p.) Auswahl- selec- 

 tion principle. Korrespondenz- 

 Bohr's correspondence principle. 



Prinzipal open diapason (organ stop). 



Prinzipschaltung basic circuit dia- 

 gram (showing underlying princi- 

 ple). 



Prlorit'ats-beanspruchung priority 

 claim, -belag priority proof. 

 -Jahr convention year. 



Prisma prism, wedge (when weak). 

 -,aneinandergesprengtes broken- 

 contact p., two quartz prisms 

 closely fitted together without 

 cementing. -,doppel umkehrendes 

 inversion prism, inverting p. 

 (reverses in both axial directions 

 of image), -geradsichtiges 

 direct-vision prism, -stark 

 fächerndes highly dispersive 

 prism. 



Prisma, Ab lenk ungs- deviating prism. 

 Aufrichtungs- erecting prism. 

 Mehrkant- polyhedral prism. 

 Polarisations- polarizer, stuf en- 

 echelon prism. Umkehr- (cf 

 Bildumkehrung) inverting prism, 

 reverting p. Vergleichs- compari- 

 son prism. Wollaston- Wollaston 

 prism, double-image p. , ZwI 11 i ngs- 

 biprism, double-image p. 



pr isma-ähnl Ich prism-like, pris- 

 moidal. -förmig prism-shaped, 

 prismatic. 



Prismen-f räche prismatic surface, p. 

 face, -sucher prismatic finder, 

 p. seeker. 



PrivatauffUhrung pre-view. 



Probe (cf PrUfer, PrUfung, Messer, 

 Messgerüt, Messung) sample, 

 specimen, lest piece; trial, test, 

 gereckte stretched specimen. 

 -, vergütete quenched or tempered 

 specimen or test piece. Beschuss- 

 bombardment test, shooting t. 

 Kapazifäts- capacity test. 

 Kegel druck- Brinell ball impres- 

 sion or indentation test, ball 

 pressure t. Loch- drift test. 

 Metall- assay, test for metal; m. 

 testing. Risshärte- abrasion 



