block system

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block system

[′bläk ‚sis·təm]
(civil engineering)
A railroad system for controlling train movements by using signals between block posts, that is, the structures that contain the instruments indicating the positions of trains, conditions within block sections, and control levers for signals and other functions.
(mining engineering)
A system of pillars in which a series of entries, rooms, and crosscuts are driven to divide the coal into blocks of about equal size which are then extracted on retreat.
References in periodicals archive ?
As standard, the valve bodies enable the following five functions: Use of pneumatic and/or manual operators, a sampling connection and CIP/SIP inlet, bottle filling, a CIP/SIP outlet, and a vent hole Due to the flexibility in the design of Gemu block systems, these functions can be offered with different geometries.
Each block system will accommodate curves, steps, corners, caps and setbacks differently.
Combining a coir block system with suitable native woody and non-woody vegetation to construct soil lifts is an excellent way to stabilize cut and fill slopes as well as streambanks in highway construction.
During construction, the bottom fabric of the coir block system should be anchored properly to the base with wooden wedges and /or metal staples.
Only 8 mm wide, the 1180 fits Phoenix Contact, Wago, Entrelec and other block systems without consuming valuable space.
Edward has been involved with Terra Block and Terra Block Systems for over three years.
He further commented, "All of us recognize there is a genuine need for the type of construction techniques offered by Terra Block International and Terra Block Systems.
Since train-to-wayside communications is provided via two-way radio, Flexiblok technology can be used as an overlay radio-based train control system to upgrade existing fixed block systems.
They also repair existing systems and provide in-house training on the operation and maintenance of divider block systems and accessories.
Many in the oil and gas industry are recognizing the importance of the cylinder and packing lubrication system -- especially the divider block system, which was designed for lubrication that's properly proportioned and distributed by positive displacement series flow valves.
CC Technology designs lubrication systems for all types of compressor applications, and offers in-house training for the operation and maintenance of divider block systems and accessories.
The system provides flexible, comprehensive integration with a utility's operational building block systems to deliver an overall enterprise solution.