A pair of electrical conductors of dissimilar materials, joined at one end (the measuring or hot junction), which produces an electromotive force (e.m.f.) due to the Seebeck effect in a circuit formed by connecting the other ends of the dissimilar materials used (the reference or cold junction) to a device for measuring e.m.f. Def. acc. to IEC 902 1987.

A pair of electrical conductors of dissimilar materials, joined at one end (the measuring or hot junction), which produces an electromotive force (e.m.f.) due to the Seebeck effect in a circuit formed by connecting the other ends of the dissimilar materials used (the reference or cold junction) to a device for measuring e.m.f. Def. acc. to IEC 902 1987.

A solid state device that converts heat flux (temperature differences) directly into electrical energy.

A solid state device that converts heat flux (temperature differences) directly into electrical energy.

A pilot switch whose function is controlled by variations of temperature and whose contacts make or break automatically a load circuit when the temperature of the ambient space in which its sensing element placed or the temperature of the surface on which it is fixed reaches a predetermined value.

A pilot switch whose function is controlled by variations of temperature and whose contacts make or break automatically a load circuit when the temperature of the ambient space in which its sensing element placed or the temperature of the surface on which it is fixed reaches a predetermined value.

A physical object that is a pressure-tight receptacle adapted to receive a temperature sensing element, provided with external threads or other means for pressure-tight attachment to a vessel or pipe.

A physical object that is a pressure-tight receptacle adapted to receive a temperature sensing element, provided with external threads or other means for pressure-tight attachment to a vessel or pipe.

A physical object that includes a water jet or propeller used on vessels intended to provide a means to move the vessel sideways for maintaining the vessel's position without anchors.

A physical object that includes a water jet or propeller used on vessels intended to provide a means to move the vessel sideways for maintaining the vessel's position without anchors.

A semiconductor device that is a three-terminal semiconductor rectifier made up of four layers, p-n-p-n, so that when the fourth is positive with respect to the first, a voltage pulse applied to the third layer initiates a flow of current through the device which continues as long as it is greater than some minimum value.

A semiconductor device that is a three-terminal semiconductor rectifier made up of four layers, p-n-p-n, so that when the fourth is positive with respect to the first, a voltage pulse applied to the third layer initiates a flow of current through the device which continues as long as it is greater than some minimum value.

A 'control panel' that contains devices required for the operation of 'thyristors'

A timepiece that measures a time interval and signals its end; a time-switch.

A timepiece that measures a time interval and signals its end; a time-switch.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A top drive is a mechanical device on a drilling rig that provides clockwise torque to the drill string to facilitate the process of drilling a borehole.

A well drilling system and an artefact in which the motor which turns the drill string is connected to the upper end of the string and moves downwardly with the drill string during the drilling operation.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A tank which is supposed to be transported.

A tank which is supposed to be transported.

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery