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Lawrence F Wagner, Wayne P Burleson, Korbin S Van Dyke: Logarithmic calculating apparatus. VLSI Techology, Limbach Limbach & Sutton, July 25, 1989: US04852038 (6 worldwide citation)

A calculating apparatus receives four operands ("a, b, c and d") simultaneously. A first multiplier/divider performs the calculation of a*b or a.div.b and provides an output u. A second multiplier/divider performs the calculation of c*d or c.div.d and provides an output v. An adder/subtractor receiv ...


2
Improvements in logarithmic calculating apparatus for use in measuring logs of timber. Joseph Charles Clarke, June 29, 1936: GB449505-A (2 worldwide citation)

449,505. Calculating-apparatus. CLARKE, J. C., Pine Falls, Manitoba, Canada. Nov. 29, 1935, No. 33117. Convention date, Dec. 3, 1934. [Class 106 (i)] An instrument for use in determining the cross-sectional area or cubic contents of logs of timber comprises a rotatable member adapted to run diametri ...


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Improvements in logarithmic calculating apparatus. Francesco Fiacchi, February 16, 1928: GB285322-A (1 worldwide citation)

285,322. Fiacchi, F. Aug. 11, 1927. Slide-rules of cylindrical form for effecting calculations relating to ferro-concrete structures. A cylinder bea.rs a number of pairs of scales denoting the useful height and the area of slabs or sections, based on different coefficients and read selectively at wi ...


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Improvements in or relating to logarithmic calculating apparatus. Herbert Fuss, April 16, 1925: GB232150-A

232,150. Fuss, H. April 29, 1924, [Convention date]. Logarithmic calculators. - Logarithmically graduated bands are arranged on sets of drums disposed close together side by side and capable of being coupled together to enable the bands to be moved simultaneously at will. In the form shown in Figs. ...


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Improvements relating to logarithmic calculating-apparatus. Philip Ray Coursey, July 1, 1926: GB254153-A

254,153. Coursey, P. R. Sept. 26, 1925. Slide-rules for effecting computations in regard to condensers in wireless circuits. The instrument, of usual form, bears scales for solving the equation V/I=.000531 #/C where V denotes the voltage across the condenser I is the current flowing through it, # re ...


6
Improvements in or relating to logarithmic calculating apparatus combined with writing implements. Joachim Schauer, October 7, 1926: GB259112-A

259,112. Schauer, J. March 8, 1926. Slide-rules combined with pencils or pens. The logarithmic scales are relatively slidable rectilinearly and are disposed in reciprocal fashion upon the body and on a split sleeve B. A cursor L may be provided of simple sleeve form or constructed as shown with a sl ...


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LILLY WALTER ELSWORTHY: [en] Improvements in or relating to Logarithmic Calculating Apparatus.. LILLY WALTER ELSWORTHY, April 3, 1913: GB191228603-A

[en] 28,603. Lilly, W. E. Dec. 11. Logarithmic calculators. - In apparatus in which the logarithmically-divided scale is set out on a disk or cone C in a spiral or set of concentric circles, one or more radial arms D, E, frictionally held to one another, are pivoted on a pin A at the pole or centre ...


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LILLY WALTER ELSWORTHY: [en] Improvements in and relating to Logarithmic Calculating Apparatus.. LILLY WALTER ELSWORTHY, June 17, 1915: GB191423968-A

[en] 23,968. Lilly, W. E. Dec. 12. Slide-rules.-A cylindrical rule is marked with two similar sets of scales A B C D, E F G H, shown developed in Fig. 2, and is provided with a slide comprising a transparent tube T, Fig. 1, graduated with one or two sets of scales exactly similar to those on the cyl ...


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HEMM HERMANN CARL CARSTEN VON: [en] Improvements in or relating to Logarithmic Calculating Apparatus.. HEMM HERMANN CARL CARSTEN VON, December 22, 1910: GB191012935-A

[en] 12,935. Hemm, H. C. C. von. May 27. Logarithmic calculators. - The logarithmic system of calculation, such as is performed with slide-rules, is adapted for wide application by mounting a number of scales on one sheet and taking measurements by means of a beam compass. The large number of techni ...


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DAEMEN SCHMID HEINRICH: [en] An Improved Calculating Machine.. DAEMEN SCHMID HEINRICH, August 26, 1909: GB190815964-A

[en] 15,964. Schmid, H. Daemen-. July 27. Calculating-apparatus.-The cylinder b, Fig. 3, of a logarithmic calculating-apparatus is provided with a detachable cover or mantle a bearing a number of logarithmic scales, which are used in conjunction with logarithmic or other scales or tables of constant ...