THE SLIDE RULES COLLECTION

TABLE OF CONTENTS

************************************************************************ (A) THE PAPER SLIDE RULE (B) THE PRINCIPLE OF SLIDE RULES (C) THE COLLECTION o Introduction o Linear Common Slide Rules o Non-Linear Common Slide Rules o Special Slide Rules & Slide Calculators o Teaching Slide Rules (D) USE OF SPECIAL SCALES ON COMMON SLIDE RULES (E) COMMON MARKS ON CURSORS (F) MARKS ON SLIDE RULES AND THEIR MEANING (G) THE HISTORY OF SLIDE RULE INVENTORS (H) HISTORICAL REMARKS TO SLIDE RULE COMPANIES (I) SOME SLIDE RULE BOOKS (A) THE PAPER SLIDE RULE ======================================================================== For an introduction see CLIFF STOLL »When Slide Rules Ruled« in May 2006 »SCIENTIFIC AMERICAN« - There is a »Copy, Cut & Fold« - PAPER SLIDE RULE (p.82) from us ( Christian Hamann & Nancy Shaw = ChriNaTECH ) included! In DEUTSCH in »SPEKTRUM DER WISSENSCHAFT« (April'07)92-99 ( SR = 94 ) ===>>> Download our PROTOTYPE (150 KB) ORIGINAL colored 5" Version ... ChriNaTECH.pdf ===>>> Go to »ACME« ( # 0.1 & 0.2 ) and see the two versions ... (B) THE PRINCIPLE OF SLIDE RULES: ======================================================================== Multiply = Add Logarithmic Scales, eg. 2*2=4 or 2*3=6 or 2*4=8 Divide = Subtract Logarithmic Scales, eg. 4:2=2 or 6:3=2 or 8:4=2 1 2 3 4 5 6 7 8 9 1 ... | | | | | | | | | | ____________________________________________________________ | | | | | | 1 2 3 4 5 6 ... add ===>> <<=== subtract (C) H O W T O U S E THE ON-LINE COLLECTION: ======================================================================== (1) TO SEE A SPECIFIC SLIDE RULE either click on its NAME below or click on its PICTURE in the left column (2) Move the mouse over its cursor to see (Pop-Up)DETAILED PICTURES (a) May be the browser has to be set to »Allow Pop-Up Windows« (b) May be the actual Pop-Up has to be deleted before the next shows up with the appropriate window ... Linear Common Slide Rules: ************************** ACME 0.1 ACME POCKET-ChriNaTECH Paper 0.2 ACME / SCIENTIFIC AMERICAN Paper ACU-MATH 1. ACU-RULE [ 8" ] MediumSize 2. ACU-MATH 1311-W LogLogDecimalTrig 3. ACU-MATH MANNHEIM Model 400 4. ACU-MATH MANNHEIM Model 500 5. ACU-MATH POCKET-MANNHEIM Model 1200 ARISTO 6. D&P (ARISTO) MANNHEIM Model 2.28 7. & 8. D&P (ARISTO) POCKET-MANNHEIM(A&B) Mahogany/Celluloid 9. -12. ARISTO POCKET-RIETZ (Ver.A,B,C,D) Model 89 13. ARISTO ( STUDENT ) RIETZ Model 95 1/2 14. ARISTO RIETZ Model 99k 15. ARISTO RIETZ (Ver.A) Model 99 16. ARISTO RIETZ [ACRYL-Body] (Ver.B) Model 99 17. ARISTO POCKET SIMPLEX Model 812 18. ARISTO POCKET-RIETZ Model 890 19. ARISTO-FLEX POCKET Model 807 20. ARISTO POCKET-DARMSTADT Model 867 21. &22. ARISTO POCKET-DARMSTADT [ACRYL-B] Model 867U 23. ARISTO-DARMSTADT (1949) Model 967 24. &25. ARISTO-DARMSTADT (Vers. A1 & A2) Model 967U 26. &27. ARISTO-DARMSTADT [ACRYL] (B1 &B2) Model 967U 28. ARISTO JUNIOR-C Model 0900 29. ARISTO JUNIOR Model 0901 30. &31. ARISTO SCHOLAR (Version A & B) Model 0903 32. ARISTO SCHOLAR VS Model 0903VS 33. &34. ARISTO SCHOLAR VS-2 (Vers.A & B) Model 0903VS-2 35. -37. ARISTO SCHOLAR-LL (V. A1,A2 & B) Model 0903LL 38. ARISTO BISCHOLAR Model 0906 39. ARISTO BISCHOLAR-LL Model 0906LL 40. &41. ARISTO TRILOG (Version A & B) Model 0908 42. ARISTO POCKET-STUDIO Model 868 43. -45. ARISTO STUDIO (Vers.A1,A2 & B) Model 0968 46. ARISTO MULTILOG [50 cm] Model 01070 47. &48. ARISTO/CHARVOZ MULTILOG (V.A & B) Model 0970 49. &50. ARISTO STUDIOLOG (Version A & B) Model 0969 51. ARISTO HYPERLOG Model 0972 AWF see WICHMANN POCKET Model 1870 DIETZGEN 52. DIETZGEN POCKET Model 1772A 53. DIETZGEN POCKET Model ??? 54. DIETZGEN POCKET REDIRULE Model 1776 55. DIETZGEN NATIONAL Model 1767 56. DIETZGEN MANIPHASE Model 1768-P 57. DIETZGEN MANIPHASE MULTIPLEX Model 1732 58. DIETZGEN VECTOR LOG LOG Model 1735 DIWA 59. DIWA POCKET-RIETZ Model 601 60. DIWA POCKET-RIETZ Model 621 61. DIWA POCKET-RIETZ Model 601-1 ECOBRA 62. &63. ECOBRA RIETZ (Aluminum) Mod.1510 & 1511 A.W.FABER / FABER-CASTELL 64. A.W.FABER SCHULRECHENSTAB (1936) Model 51/39/339 65. A.W.FABER RIETZ (1903) Model 375 66. FABER-CASTELL RIETZ (1939) Model 1/75/375 67. FABER-CASTELL RIETZ (1934) Model 387 68. FABER-CASTELL POCKET (1937) Model 63/91 69. FABER-CASTELL POCKET-RIETZ (1938) Model 63/87 70. FABER-CASTELL MINI-POCKET (1941) Model 74/91 71. &72. FABER-CASTELL RIETZ (V.A & B) Model 1/87 73. FABER-CASTELL RIETZ (USA-Vers.C) Model 1/87 74. FABER-CASTELL RIETZ (1946) Model 11/87 75. FABER-CASTELL COLUMBUS (1969) Model 57/86 76. &77. FABER-CASTELL RIETZ N (V.A & B) Model 57/88 78. -80. FABER-CASTELL RIETZ (V.A, B & C) Model 57/87 81. &82. F.-C. POCKET-RIETZ (V.A & B) Model 67/87 83. FABER-CASTELL POCKET-RIETZ Model 167/87g 84. F.-C. POCKET-RIETZ/ADDIATOR Model 67/87Rb 85. &86. FABER-CASTELL RIETZ (V.A & B) Model 111/87 87. FABER-CASTELL RIETZ/ADDIATOR Model 111/87A 88. &89. FABER-CASTELL DARMSTADT (V.A & B) Model 1/54 90. FABER-CASTELL DARMSTADT (V.C) Model 1/54 91. &92. F.-C. DARMSTADT [50 cm] (V.A & B) Model 4/54 93. &94. FABER-CASTELL DARMSTADT (V.A & B) Model 111/54 95. FABER-CASTELL POCKET-DARMSTADT Model 67/54 96. &97. F.-C. POCKET-DARMSTADT (V.A & B) Model 67/54b 98. F.-C. POCKET-DARMSTADT/ADDIATOR Model 67/54Rb 99. FABER-CASTELL MENTOR Model 52/80 100.-102.F.-C. LOG-LOG (Vers. A, B & C) Model 57/89 103.-107.F.-C. D-STAB (A1,A2, B1,B2s,B2g) Model 52/82 108.&109.FABER-CASTELL DUPLEX (V.A & B) Model 2/82 110. FABER-CASTELL POCKET-DUPLEX Model 62/82 111. FABER-CASTELL NOVO-MENTOR Model 52/81 112.&113.FABER-CASTELL NOVO-DUPLEX (V.A&B) Model 2/83 114.&115.F.-C. POCKET-NOVO-DUPLEX (V.A&B) Model 62/83 116. FABER-CASTELL NOVO-DUPLEX Model 2/83N 117. FABER-CASTELL MATHEMA Model 2/84 GRAPHOPLEX 118. GRAPHOPLEX RIETZ Model 620 HEMMI 119. HEMMI MINI-POCKET [10 cm] Mannheim 120. HEMMI POCKET-RIETZ Model 66 121. HEMMI POCKET Model 2634 122. HEMMI POCKET-DARMSTADT Model 135 123. HEMMI Model 259 124. HEMMI/ODELCO HYPERLOG Model 255D HOEHLER 125. HOEHLER RIETZ [19 cm] MediumSize HUGHES-OWENS 126. HUGHES-OWENS 1771 Mannheim KEUFFEL & ESSER 127. KEUFFEL & ESSER 4058 W BEGINNER'S 128. KEUFFEL & ESSER 4056 FAVORITE 129. KEUFFEL & ESSER 4035 [8 "] MediumSize 130.&131.KEUFFEL & ESSER 4053-3 (V.A & B) PolyPhase 132. KEUFFEL & ESSER N4053-3 PolyPhase 133. KEUFFEL & ESSER N4053-5 [20 "] PolyPhase 134. KEUFFEL & ESSER 4088-3 PolyPhaseDuplex 135.&136.KEUFFEL & ESSER POCKET (V.A & B) 4097_D 137. KEUFFEL & ESSER 4071-3 PolyPhaseDuplex 138. KEUFFEL & ESSER 681497 PolyPhaseDuplex 139. KEUFFEL & ESSER 4080-3 LogLogDuplexTrig 140. KEUFFEL & ESSER 4081-3 (Vers.A) LogLogDuplexDecitrig 141. KEUFFEL & ESSER 4081-3 (Vers.B) LogLogDuplexDecitrig 142. KEUFFEL & ESSER 4081-5 [20 "] LogLogDuplexDecitrig 143. KEUFFEL & ESSER N4081-3 LogLogDuplexDecitrig 144. KEUFFEL & ESSER POCKET 4181-1 LogLogDuplexDecitrig 145. KEUFFEL & ESSER 4158 K-12 Prep 146. KEUFFEL & ESSER / ECCO POCKET DORIC 10000 147. KEUFFEL & ESSER N9081-3 DORIC KLAWUN 148. KLAWUN-REX Model 200 KOLESCH 149. KOLESCH Simplex LAWRENCE 150. LAWRENCE ENGINEERING Model 10-B LOGAREX 151. LOGAREX 4542-27403 152. LOGAREX 27403-II 153. LOGAREX STUDIO TECHNIK-I 27607-I LUTZ 154. LUTZ Model 102 S 155. LUTZ Model 252 MANTISSA 156.&157.MANTISSA RIETZ (Vers.A & B) Nr.1731511 158. MANTISSA MONO-RIETZ Nr.1731541 159.&160.MANTISSA-DARMSTADT II (V.A & B) Nr.1731523/4 161. MANTISSA POCKET-MULTI Nr.1731575 162. MANTISSA RECORD Nr.1731421 163. MANTISSA VARIANT II Nr.1731573/4 MEISSNER 164. MEISSNER RIETZ (Version A) Model 75/2b 165.&166.MEISSNER RIETZ (Vers.B & C) with Magn.Cursor 167. MEISSNER DARMSTADT Model 772/6 168. MEISSNER MONO-RIETZ Nr.1731541 169.&170.MEISSNER RIETZ (Vers.A & B) Duplex 171. MEISSNER DARMSTADT Duplex 172. MEISSNER DARMSTADT II Nr.1731523/4 173. MEISSNER VARIANT Duplex 174. MEISSNER VARIANT II Nr.1731573/4 NESTLER 175. NESTLER (1885) Model 1 176. NESTLER (1900) Model 3 177. NESTLER RIETZ (1920) Model 9 178. NESTLER SCHUL-RIETZ (1936) Model 9 179. NESTLER POCKET-RIETZ [15 cm] Model 12d 180.&181.NESTLER POCKET-RIETZ (Vers.A & B) Siemens-Schuckert 182.&183.NESTLER RIETZ (Vers.A & B) Model 14 184. NESTLER RIETZ Model 20 185. NESTLER RIETZ Model 23 186.&187.NESTLER RIETZ (Vers.A & B) Model 23R/3 188. NESTLER POCKET-RIETZ [15 cm] Model 22 189. NESTLER RIETZ (1970) Model 0232 190. NESTLER RIETZ [50 cm] Model 0235 191. NESTLER SCHUL-RIETZ Model 0208 192. NESTLER SCHUL-RIETZ Model 9/53 193. NESTLER RIETZ Model 0238 194. NESTLER RIETZ Model 0239 195. NESTLER POCKET-RIETZ Model 11R 196.-198.NESTLER POCKET-RIETZ (V.A & B) Model-0123 & Model-S 199. NESTLER POCKET-DARMSTADT Model 11D 200. NESTLER POCKET-DARMSTADT Model 0121 201.&202.NESTLER DARMSTADT (Vers.A & B) Model 21 203. NESTLER DARMSTADT (1960) Model 0210 204. NESTLER PRAEZISION (1912) Model 27 205. NESTLER PRAEZISION (1950) Model 0270 206.-208.NESTLER DARMSTADT (Vers.A, B & C) Model 0218 209. NESTLER GAMMA Model 0253 210. NESTLER DELTA Model 0254 211. NESTLER MULTIMATH-DUPLEX Model 0292 PICKETT & ECKEL 212. PICKETT POCKET 20 [SheetMetal] AllMetal BASIC 213. PICKETT 2 [Magn.Alloy] AllMetalDeciLogLog 214. PICKETT POCKET 200 [Magn.Alloy] AllMetalTrig 215. PICKETT 902 [Magn.Alloy] AllMetalSimplexTrig 216. PICKETT POCKET N200-ES AllMetalTrig 217. PICKETT POCKET N200-T AllMetalTrig 218.&219.PICKETT N902-ES / -T AllMetalSimplexTrig 220. PICKETT 1000 AllMetalOrthoPhaseDuplex 221. PICKETT POCKET N1006 AllMetalTrig 222. PICKETT N1010-ES AllMetalTrig 223. PICKETT 500 AllMetalOrthoPhaseLogLog 224. PICKETT N-500-ES AllMetalHiLogLog 225. PICKETT N-500-T AllMetalHiLogLog 226. PICKETT POCKET 600 AllMetalLogLog 227. PICKETT POCKET N600-ES AllMetalLogLogSpeedRule 228. PICKETT N800-ES AllMetalLogLogSpeedRule 229.&230.PICKETT 803-T / -ES AllMetalLogLogStandardRange 231.&232.PICKETT N803-ES / -T AllMetalLogLogDualBase 233. PICKETT POCKET N3P-ES AllMetalPowerLogExponential 234.&235.PICKETT N4-ES (V.A & B) AllMetalVectorLogLog 236. PICKETT » TRAINER « (1964) Model 120 237. PICKETT (1970) Model 120 238. PICKETT Model 80 239.&240.PICKETT (yellow & white Version) Microline 120 241. PICKETT Microline 121 242. PICKETT Microline 140 243. PICKETT POCKET Microline 160 POST 244. POST / HEMMI MINI-POCKET [10 cm] Model 1441 245. POST / HEMMI POCKET Model 1444K 246. POST / HEMMI Model 1446 247. POST / HEMMI Model 1447 248. POST / HEMMI Model 1452(WL) 249. POST MANNHEIM Model 1452P 250. POST / HEMMI [20 cm] Model 1445 251. POST / HEMMI POCKET-VERSALOG (I) Model 1461 252. POST / HEMMI VERSALOG (I) Model 1460 253. POST / HEMMI VERSALOG (II) Model 1460 REISS 254. REISS RIETZ (Version A) LightMetal 255. REISS RIETZ (Version B) LightMetal 256. REISS POCKET-RIETZ LightMetal Model 3209 257. REISS POCKET-RIETZ DECELITH Model 3212 258. REISS POCKET-RIETZ DECELITH 259.&260.REISS RIETZ-SPEZIAL (Vers.A & B) LightMetal Model 3201 261. REISS DARMSTADT MAHOGANY 262.-264.REISS DARMSTADT (Vers.A, B1 & B2) LightMetal 265. REISS POCKET-DARMSTADT DECELITH 266. REISS DARMSTADT-RECORD DECELITH Model 3214 267. REISS PROGRESS LightMetal Model 3223 268.&269.REISS DUPLEX (Vers.A & B) DECELITH Model 3227 SCIENTIFIC INSTRUMENTS 270. SIC POCKET LOG-LOG DECATRIG Model 5510 271. SIC LOG-LOG DECATRIG Model 1510 STERLING 272. STERLING POCKET Model 587(p) 273. STERLING PRECISION ( Model 584 ) 274.&275.STERLING PRECISION RULER (V.A&B) ( Model 587 ) 276.&277.STERLING MULTI-LOG / LOG-LOG Model 594 / ??? TAVERNIER-GRAVET 278. TAVERNIER-GRAVET MANNHEIM ( "MINISTERE DE LA GUERRE" ) UNIS 279. UNIS POCKET-MANNHEIM ( 1910 ) UTO 280. UTO POCKET-RIETZ Model 601U 281. UTO DUPLEX Model 901U WICHMANN 282. WICHMANN RIETZ 283. WICHMANN-RIETZ [ANAG] Model 474 284. WICHMANN POCKET-MANNHEIM [AWF] Model 1870 285. WICHMANN-RIETZ Model 1418 286. WICHMANN-DARMSTADT Model 4477 287. WICHMANN-PRECISION Model 1417 O T H E R S & "NO-NAMES" 288. GLOBEMASTER RIETZ Model 62205 289. RIETZ C-THRU (NoName) [20 cm] Model 883 290. RIETZ NoName Model R151 291. RIETZ NoName ( ? K&E ? ) Made in USA 292. RIETZ TRISO/TOVARNA-MERIL Model 6502 Non-Linear Common Slide Rules: ****************************** 293. CONCISE / DOW Model CTCS-552 294. CONCISE / PAN_AM Model 28 295. CONCISE / SHELL Model(28) 296. CONCISE (Version A) Model 28N 297. CONCISE (Version B) Model 28N 298. CONCISE Model 260 299. CONCISE Model 300 300. CONTROLLER Model 110R 301. KALKULATOR Model 66 mm 302. FABER-CASTELL Model 8/10 303. FOWLER VestPocketCalculator 304. FULLERTON ACUDIAL Model 1458 305. GENERAL-ELECTRIC Circular 306. GILSON ATLAS 35'Spiral 307. GILSON BINARY Circular 308. GILSON MIDGET-BINARY Circular 309. HEMMI Model 1001 310. K&E THACHER's Model 4012 311. OTIS-KING Model L 312. RUSSIAN SLIDE RULE WATCH Model KL-1 313. SIC PROFESSIONAL Model 250 314. SIC PROFESSIONAL Model 120 315.&316.TROEGER RECHENSCHEIBEN Model 1 & 2 Special Slide Rules & Slide Calculators: **************************************** » S p e c i a l s « ... 317. TIE SLIDE RULE Sterling Silver 318. SLIDERS RULE Celluloid 319. » EDUCATED MONKEY « CALCULATOR Sheet Metal Proportional Scales ... 320. PROPORTIONAL-SCALE Bruns & Stauff 321. PROPORTIONAL-SCALE Model PS-79 322. PROPORTIONAL-SCALE Model PS-80 323. NORMA-GRAFIA Model 190 324. PROPORTIONAL-SCALE STAEDLER 5621 PSI Business ... 325. D&P (ARISTO) BUSINESS/Dr.Stender Model 43/28 326. ARISTO COMMERZ-JUNIOR Model 0907 327.-329.ARISTO COMMERZ II (V.A, B & C) Model 965 330. ARISTO COMMERZ III Model 623 331. FABER-CASTELL COLUMBUS/A.Rohrberg Model 342 332.&333.FABER-CASTELL DISPONENT (V.A & B) Model 1/22 334. FABER-CASTELL DISPONENT Model 11/22 335. FABER-CASTELL DISPONENT/ADDIATOR Model 1/22A 336. F.-C. POCKET-DISPONENT/ADDIATOR Model 67/22R 337. FABER-CASTELL STUDENT DISPONENT Model 57/22 338. FABER-CASTELL DISPONENT Model 111/22 339.&340.F.-C. POCKET-DISPONENT (V.A & B) Model 67/22 341. KLAWUN(?NESTLER)-KAUFMANN Model 333/S 342.&343.NESTLER KAUFMANN (V.A & B) Model 40 344. NESTLER POCKET-KAUFMANN Model 0140 345. NORMA MERKURIA Model 190 346. PRESTOLOG PROFITMETER W.A.Kempenich 347. PROFIT INDICATOR Model 1111 Geodetics ... 348. ARISTO GEODAT ( 400 g Version ) Model 0958 Electro / Radio ... 349. ARISTO ELEKTRO (1942) Model 914 350. ARISTO ELEKTRO (1959) Model 915 351. ARISTO POCKET-ELEKTRO TELEFUNKEN 352. ARISTO POCKET-ELEKTRO Model 852 353. CONCISE / HP Model 200EE 354. FABER-CASTELL ELEKTRO (1900) Model 378 355.&356.FABER-CASTELL ELEKTRO (V.A & B) Model 1/98/398 357. FABER-CASTELL ELEKTRO (1953) Model 1/98 358. FABER-CASTELL ELEKTRO (1961) Model 111/98 359. IWA / DE MUIDERKRING RADIO Model 51904 360. IWA / DE MUIDERKRING RADIO Model 0272 361. MANTISSA ELECTRIC Model 1731591 362.-364.NESTLER ELEKTRO (Vers. A, B & C) Model 37 365.&366.NESTLER POCKET-ELEKTRO (V.A & B) Model 0137 367. NESTLER POCKET-ELEKTRO AEG 368. PICKETT N-515-T / CIE RADIO AllMetalElectronic 369. REISS-ELEKTRO LightMetal 370. SHURE REACTANCE SLIDE RULE (1942) 371. SIC ELECTRO HYPER-VECTOR-LOG-LOG Model 1580 372. WIRE CALCULATOR T.&T.Electric Air Conditioning ... 373. CLIMATE- & HUMIDITY SLIDE RULE Model 1802 374. IWA / WILO HEIZUNGSRECHNER Model 03135 Concrete ... 375.&376.POCKET CONCRETE CALCULATOR (VA&B) Mt.Shasta ReadyMix 377. POCKET CONCRETE ESTIMATOR TransitMixedConcrete Artillery ... 378. ARTILLERY SR ( Aluminum ) REISS 379. ARTILLERY SR ( Plastic ) MANTISSA Time-Speed-Distance / Fuel ... 380. MERCEDES-BENZ FUEL CALCULATOR IWA 10287 381. REISE-RECHNER / PARK-SCHEIBE 1992 382. TIME-SPEED-DISTANCE ESTIMATOR Model TSD400 383. NAUTICAL SLIDE RULE Weems & Plath 384.&385.TIME-DISTANCE COMPUTER as (1st) PENDANT, (2nd) CLIP, 386. TIME-DISTANCE COMPUTER as (3rd) LIGHTER 387. NAVITIMER BREITLING Navigation ... 388. A "NAVITIMER" made by CITIZEN Model BY0000-56L 389. KNEMEYER NAVIGATION COMPUTER Model DR3Tp 390. ARISTO FLIGHT COMPUTER AVIAT 615 391. ARISTO FLIGHT COMPUTER AVIAT 618 392. U.S. ARMY FLIGHT COMPUTER Model E-6B 393. JEPPESEN FLIGHT COMPUTER Model CR-5 394. JEPPESEN POCKET FLIGHT COMPUTER Model CSG-1A 395. JEPPESEN FLIGHT COMPUTER Model CSG-2A 396. SANDERSON FLIGHT COMPUTER Model SC-3B 397. ASA FLIGHT COMPUTER Model E6-B 398. APR FLIGHT COMPUTER Model E6-B2 399. B747 FLIGHT COMPUTER Model D-3A Radioactivity / Radiation Protection ... 400. ARISTO » STRAHLEN-SCHUTZ « Model 10174 401. ISOTOPE CALCULATOR AERE I/R 333 US / METRIC Converters ... 402. PARIFIX METRIC CONVERTER Faber-Castell 20/68 403. POCKET METRIVERTER Y.B.G. Daton/Ohio 404. UNIVERSAL CIRCLE METRIC CONVERTER Made in Hongkong Teaching Slide Rules: ********************* 405. ARISTO JUNIOR 301 Plastic 406. FABER-CASTELL LOG-LOG Plastic/Wood 407. FABER-CASTELL NOVO-DUPLEX Plastic/Wood-Frame/Cardboard 408. PICKETT N1010-ES CompositWood (D) USE OF SPECIAL SCALES ON COMMON SLIDE RULES ======================================================================== CI & DI Scales ************** These scales are reciprocal to the corresponding C & D ( = X ) scales: CI = 1/C ; DI = 1/D. They make an efficient way for (1) multiplication and (2) are useful in replacing division by multiplication. This may be also used to avoid re-setting of the slide, when the next number to proceed would be outside of the slide. Example (1): 12.3 * 4.56 = 12.3 / ( 1 / 4.56 ) = 56.09 ------------ Set 4.56 on CI scale opposit to 12.3 on D scale (»division« operation) and read the result on D scale under the right »1«. Example (2): 12.3 / ( 4.56 * 2.34 ) = 1.153 ------------ Set 4.56 on the C scale opposite to 12.3 on the D scale. Move the hairline to 2.34 on the CI scale (»multiplication« operation) and read the result on the D scale. CF & DF Scales ************** These scales are »folded«: CF = π * C ; DF = π * D. They begin at π and the »1« is nearly in the middle of the rule. Any setting of C or D is automatically set on CF and DF too; therefore they can be used for: (1) Multiplication and division in the same way as with C & D (2) For all calculations involving multiplication (or division) of π eg.: Diameter * π = Circumference. (3) Most important is the use of CF & DF to avoid re-setting the slide. If the next number to proceed would be outside of the slide, it can be made on the CF & DF scales! Example (2): 3.45 * π = 10.84 ------------ Set the hairline on 3.45 on D scale and read the result on DF scale. Example (3): 1 kg = 2.2 lb 3.4 kg = ? 5.6 kg = ? ------------ Set the 2.2 on the C scale opposit to the left »1« on the D scale. For 3.4 on D scale the result 7.48 is on C scale - but for 5.6 there is no C available: Read 5.6 on DF and the result 12.3 on CF scale. CIF & DIF Scales **************** These scales are reciprocal to the corresponding CF & DF scales: CIF = 1/CF ; DIF = 1/DF. Same is true, what is said above for CI & DI. (E) COMMON MARKS ON THE CURSOR ======================================================================== FAQ: **** "Why my cursor has 3 vertical lines: A long black one in the middle, a red one in the left upper half, and a red one in the right lower half? - And I have seen other marks too..." Answer: ******* When the black hairline is set (on C or D = X) on the DIAMETER, than the left red line shows (on B or A = X²) the AREA of the CIRCLE - or when the black line is set (on A or B = X²) on the AREA of the CIRCLE, than the DIAMETER can be read under the right red line (on D or C = X). Common is the relation between the lower-middle and the upper-right hairlines on the cursor for the CONVERSION 1 [kW] = 1.3596 [PS]. Sometimes this relation is with the left to the right hairline on C/D. (F) MARKS ON SLIDE RULES AND THEIR MEANING ======================================================================== e = 2.71828 Euler's Constant = Base of Log.Naturalis π = 3.14159 Circular Constant c = sqrt(4/π) = 1.128 for Area-to-Diameter Conversion ' = π/4 = 0.7854 for Diameter-to-Area Conversion ρ = π/180 = 0.01745 Multiplier Degrees-to-Radians R = 180/π = 57.29 Multiplier Radians-to-Degrees ρ' = 60 * 180/π = 3437.7 Multiplier Radians-to-Degrees in Minutes ρ" = 3600 * 180/π = 206265 Multiplier Radians-to-Degrees in Seconds 1 kW = 1.3596 PS = 1.3410 HP ; 1 PS = 0.7355 kW ; 1 HP = 0.7457 kW ... (G) THE HISTORY OF SLIDE RULE INVENTORS: ======================================================================== ... see Special Site ... (H) HISTORICAL REMARKS TO SLIDE RULE COMPANIES ... ======================================================================== ... see Special Site ... (I) SOME SLIDE RULE BOOKS ... ======================================================================== ... see Special Site ... impressum: ************************************************************************ © C.HAMANN http://public.beuth-hochschule.de/~hamann 05/07/13