Devices characterised by the determination of the time taken to traverse a fixed distance

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Measuring linear or angular speed; Measuring differences of linear or angular speeds > Devices characterised by the determination of the time taken to traverse a fixed distance

CPC:

Measuring linear or angular speed; Measuring differences of linear or angular speeds (G01P5/00 - G01P11/00 take precedence; ; counting mechanisms G06M) > Devices characterised by the determination of the time taken to traverse a fixed distance

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01P 3/66 using electric or magnetic means (G01P3/80 takes precedence; measuring short time intervals G04F8/00, G04F10/00) +1 CPC IPC+CPC Available in IPC and CPC
G01P 3/68 using optical means, i.e. using infrared, visible, or ultraviolet light (G01P3/80 takes precedence ) +1 CPC IPC+CPC Available in IPC and CPC
G01P 3/80 using auto-correlation or cross-correlation detection means since 1985 +2 CPC IPC+CPC Available in IPC and CPC