Length Gauge

Length Gauge

 

a device for measuring distances by means of a measuring unit and a flexible line (usually steel wire). Length gauges are used in mine surveying work.

The main components of a length gauge are a measuring unit connected to a revolution counter, and pulleys that lead the wire into the measuring unit. Devices for tightening the wire and suspending it over the line being measured are also part of the gauge. Length gauges measure horizontal and sloping distances by the number of turns of the measuring unit as it moves along the wire, which is stretched between two points. A length gauge can measure distances up to 500 m with an average error not exceeding 1:10,000. Length gauges are made for measuring the depth of vertical mine shafts (up to 1,000 m). According to their principle of operation, length gauges are analogous to the mechanical depth gauges used in navigation.

References in periodicals archive ?
The MT 2751 length gauge was interfaced to PIC18F452 microcontroller through the LS736, a 32-bit CMOS counter, with direct interface for quadrature clocks from incremental encoders.
In this stage we measured etching depth using our increased precision length measurement system based on the MT 2751 length gauge.
Unless there is some reason not to I just start by seating all bullets to just barely touch the rifling using a Stoney Point overall length gauge.
Force at break (in Newtons) was recorded from digital output, and benchmark separation at break was measured by length gauge and recorded.
The best I've used is the Stoney Point Overall Length Gauge.
In 1992 a little gadget from Stoney Point Products, logically called the overall length gauge, made the job a piece of cake.
One important part of the Stoney Point Overall Length Gauge is the bullet comparator insert.
e] is fixed by using reference measure of length, for example, end length gauge (length standard).
Gauge blocks filled a critical need for inexpensive and flexible length gauges for over a century, a remarkably long period.
The Proton InteliSENS speed and length gauges can be retrofitted to a range of web processing equipment, including label and laminating machines where it can be used for the control of line speed or speed balancing purposes.