Scale conversion apparatus

Claim 2

Scale conversion apparatus for converting an input series sequence of electrical pulses of either sign significance, representing equal incremental quantities expressed in a particular measurement scale, to an output series sequence of pulses expressed in another scale, where the output/input scale ratio is D/N, comprising pulse-counting means arranged to count the input pulses and identify each group totaling N algebraically, a detector stage responsive to the state of the counting means to identify in each group the locations for (D-N) single pulses spaced substantially evenly from one another within the group and from the nearest correspondIng single pulses of immediately adjacent group(s), and develop a control signal with respect to each location, and operative means arranged to be controlled by those control signals so as to effectively add the single pulses algebraically, in dependence on the sign of (D-N), to each input group at the locations identified by the detector stage, thereby deriving as said output sequence an output group totalling D pulses algebraically for each of said input groups of N pulses together with gating means responsive to the sign of the input pulses and to the input pulses themselves, for delaying each such effective addition of a single pulse until the arrival of the next input pulse, thereby preventing such addition if a change of sign should occur after generation of the corresponding control signal but before such addition has taken place.

Claim 3

Apparatus as claimed in claim 1 wherein the pulse-counting means includes a bidirectional binary synchronous counter and said detector stage is arranged to develop a said control signal each time a particular one of the digit stages of the counter changes from digit 0 to digit 1 on an upward count or from digit 1 to digit 0 on a downward count, thereby in each case identifying one of said locations.

Claim 4

Apparatus as claimed in claim 2 wherein the detector stage includes a gating network arranged to derive a control signal each time a pulse of the input group finds that particular digit stage enabled and holding either digit 0 on an upward count or digit 1 on a downward count.

Claim 5

Scale conversion apparatus for converting an input series sequence of electrical pulses of either sign significance, representing equal incremental quantities expressed in a particular measurement scale, to an output series sequence of pulses expressed in another scale, where the output/input scale ratio is D/N and (D-N) is positive, comprising pulse counting means arranged to count the input pulses and identify each group totalling N algebraically, a detector stage responsive to the state of the counting means to identify in each group the locations for (D-N) single pulses spaced substantially evenly from one another within the group and from the nearest corresponding single pulses of immediately adjacent group(s), and develop a control signal with respect to each location, and operative means arranged to be controlled by those control signals so as to effectively add the single pulses algebraically, in dependence on the sign of (D-N), to each input group at the locations identified by the detector stage, said operative means including means to be operated by said control signal to give the input pulse at each of said locations the effect of two pulses thereby deriving as said output sequence an output group totalling D pulses algebraically for each of said input groups of N pulses.

Claim 6

Scale conversion apparatus for converting an input series sequence of electrical pulses of either sign significance, representing equal incremental quantities expressed in a particular measurement scale, to an output series sequence of pulses expressed in another scale, where the output/input scale ratio is D/N and (D-N) is positive, comprising pulse counting means arranged to count the input pulses and identify each group totalling N algebraically, a detector stage responsive to the state of the counting means to identify in each group the locations for (D-N) single pulses spaced substantially evenly from one another within the group and from the nearest corresponding single pulses of immediately adjacent group(s), and develop a control signal with respect to each location, and operative means arranged to be controlled by those control signals so as to effectively add the single pulses algebraically, in dependence on the sign of (D-N), to each input group at the locations identified by the detector stage, said operative means including means to be operated by said control signal to give the input pulse at each of said locations the effect of two pulses thereby deriving as said output sequence an output group totalling D pulses algebraically for each of said input groups of N pulses.

Claim 7

Scale conversion apparatus for converting an input series sequence of electrical pulses of either sign significance, representing equal incremental quantities expressed in a particular measurement scale, to an output series sequence of pulses expressed in another scale, where the output/input scale ratio is D/N, comprising pulse-counting means arranged to count the input pulses and identify each group totalling N algebraically, said pulse-counting means including a bidirectional binary synchronous counter and said detector stage is arranged to develop a said control signal each time a particular one of the digit stages of the counter changes from digit 0 to digit 1 on an upward count or from digit 1 to digit 0 on a downward count, thereby in each case identifying one of said locations, a detector stage responsive to the state of the counting means to identify in each group the locations for (D-N) single pulses spaced substantially evenly from one another within the group and from the nearest corResponding single pulses of immediately adjacent group(s), and develop a control signal with respect to each location, and operative means arranged to be controlled by those control signals so as to effectively add the single pulses algebraically, in dependence on the sign of (D-N), to each input group at the locations identified by the detector stage, said operative means including connections for causing the control signal to disable the counter stage of least significance and enable the next higher stage (if not already enabled), thereby causing the next input pulse to have the effect of two pulses thereby deriving as said output sequence an output group totalling D pulses algebraically for each of said input groups of N pulses.

Claim 8

Scale conversion apparatus for converting an input series sequence of electrical pulses of either sign significance, representing equal incremental quantities expressed in a particular measurement scale, to an output series sequence of pulses expressed in another scale, where the output/input scale ratio is D/N, comprising pulse-counting means arranged to count the input pulses and identify each group totalling N algebraically, said pulse-counting means including a bidirectional binary synchronous counter and said detector stage is arranged to develop a said control signal each time a particular one of the digit stages of the counter changes from digit 0 to digit 1 on an upward count or from digit 1 to digit 0 on a downward count, thereby in each case identifying one of said locations, a detector stage responsive to the state of the counting means to identify in each group the locations for (D-N) single pulses spaced substantially evenly from one another within the group and from the nearest corResponding single pulses of immediately adjacent group(s), and develop a control signal with respect to each location, and operative means arranged to be controlled by those control signals so as to effectively add the single pulses algebraically, in dependence on the sign of (D-N), to each input group at the locations identified by the detector stage, said operative means including connections for causing the control signal to disable the counter stage of least significance and enable the next higher stage (if not already enabled), thereby causing the next input pulse to have the effect of two pulses thereby deriving as said output sequence an output group totalling D pulses algebraically for each of said input groups of N pulses.