Abstract: An apparatus for pulling a wire through a conduit comprising a base including a planar bottom surface for frictionally engaging a floor and a pair of wedges for anchoring the base to a wall, a pair of upstanding members each being affixed to the base, a shaft oriented with its axis parallel to the bottom surface and journaled proximate each end to the upstanding members, and a pulley secured to an end of the shaft, the pulley having a grooved rim which is formed to receive the wire and having a diameter large enough to prevent the wire from acquiring a set.

Abstract: This invention provides a differential pressure-activated control system having non-mechanical, remotely controllable, biasing means. The system comprises a differential pressure sensing means, having opposing first and second pressure sensing portions, a conduit between one portion of the sensing means and a system to be monitored and a second conduit means between a second portion of the pressure sensing means and the system to be monitored; the second conduit comprising in intermediate fluid flow pressure connection, a pressure regulator which limits the maximum pressure, in accordance with a desired predetermined pressure, conducted to the second portion of the pressure sensing means. Such pressure regulator can be remote from the system and from the pressure sensing means and is connected thereto only by non-moving, pressure-connecting means.