interlock

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interlock

a device, esp one operated electromechanically, used in a logic circuit or electrical safety system to prevent an activity being initiated unless preceded by certain events

Interlock

 

a set of methods and facilities that ensure holding the operating parts (components) of an apparatus, machine, or circuit (electrical) in a definite state which is maintained regardless of whether the interlocking action ceases. Interlocking increases the safety of service and the operating reliability of equipment, ensures the required operational sequence for mechanisms and components, and restricts the motions of mechanisms to the limits of the operating zone. The state (position) of operating parts in an object is held, depending on the operating principle of the interlocking device, by mechanical, magnetic, optical, or electrical means. Interlocking is discontinued by an action that returns the locked portions of an apparatus, machine, or circuit to the initial condition (before the interlocking) or permits a transition into another operating position by the presence of a corresponding signal. Interlocking can be achieved by manual, semiautomatic, and automatic means. In electrical equipment or in equipment having an electrical control, an interlock is set up to counter simultaneous actions or an incorrect sequence of connections or disconnections by interrupting the electrical power circuits; in machines with a hydraulic drive, an interlock shuts off the valves in the supply system; and so on. For example, in domestic gas hot water heaters there is an interlocking device that turns off the gas supply if the inflow of water is interrupted.

Interlocking is extensively employed in transportation, electric power stations and substations, industrial plants, computing equipment, and various production and domestic apparatus and devices.

I. E. DEKABRUN

interlock

[′in·tər‚läk]
(computer science)
A mechanism, implemented in hardware or software, to coordinate the activity of two or more processes within a computing system, and to ensure that one process has reached a suitable state such that the other may proceed.
(engineering)
A switch or other device that prevents activation of a piece of equipment when a protective door is open or some other hazard exists.

interlock

A device that prohibits an action from taking place.
References in periodicals archive ?
The first phase of the pilot funded 175 alcohol interlock devices which are connected to the start-up mechanism of a vehicle and immobilise it until the driver has successfully passed a breath alcohol test.
There are discrepancies between the number of people required to install the devices and the number of interlocks actually installed.
scholars considered corporate interlocks "antagonistic to the
In order to be able to create common automation infrastructures, mechanical interlocks should be connected to the DCS and SIS.
This article describes how new electronic health technologies are being applied or can be applied to enhance the use of vehicle interlocks and achieve the goals listed above.
But statistics show that in 2011 only about 35 percent of offenders installed the interlock devices as required to regain their driving rights, Anne Pratt, a spokeswoman for Mothers Against Drunk Drivers, said Monday.
For this group, only one session was conducted in phase 1 (B--metacontingencies) (see Figure 2), and the group performed only 10 interlocks during the 30 cycles of the session.
Black and Gold Interlocks provide our customers with a better way to ensure consistent quality parts every time," said Bob Starr, director of marketing at DME.
Since the incidence of interlocked directors and firm performance may be jointly determined by the underlying quality of corporate governance, we employ a simultaneous equations framework to control for potential endogeneity between the presence of interlocks and firm performance.
The PRX-100 switches have application in equipment automation, industrial warewashers, safety interlocks and medical instruments.