Abstract: A locking cover apparatus for construction vaults. The cover has a latch portion configured to rotate in a first and second direction when a threaded locking security bolt is rotated in the first and second direction respectively, and where the cover is locked from removal from the vault when the latch portion comes into contact with a first stop mechanism after rotating in the first direction and wherein the cover is unlocked when the latch portion comes into contact with a second stop mechanism after rotating in the second direction.

Abstract: A locking cover for existing subgrade vault openings. The cover is installed with mounting brackets on side walls of construction vaults and secured with locking latch components secured against flange portions of the mounting brackets.

Abstract: A locking cover for existing subgrade vault openings. The cover is installed with mounting brackets on side walls of construction vaults and secured with locking latch components secured against flange portions of the mounting brackets.

Abstract: An apparatus for rapidly terminating of the flow of any fluid or particulate material through a conduit responsive to predefined dangerous conditions. A particular application will terminate fuel flow through a large fuel supply conduit in a racing vehicle responsive to a fire or accident or other dangerous condition. The apparatus includes a gas supply source that is opened responsive to actuation of the apparatus such that gas passes into a cylinder which moves to force a liquid to hydraulically expand an inflatable member which is operative to expand within the flow conduit to instantaneously terminate material flow therethrough.

Abstract: An apparatus for rapidly terminating of the flow of any fluid or particulate material through a conduit responsive to predefined dangerous conditions. A particular application will terminate fuel flow through a large fuel supply conduit in a racing vehicle responsive to a fire or accident or other dangerous condition. The apparatus includes a gas supply source that is opened responsive to actuation of the apparatus such that gas passes into a cylinder which moves to force a liquid to hydraulically expand an inflatable member which is operative to expand within the flow conduit to instantaneously terminate material flow therethrough.

Abstract: A portable extendable inclined boiler having an open and a closed end, for steaming and thereby softening wooden members for later bending including: a low water cutoff utilizing a thermostat mounted on the boiler wall near the heater; a low water cutoff actuated by the reduction in weight of boiler heater to a predetermined minimum; a steam control thermostat mounted at the open end of the boiler which temporarily turns off the heater when excess steam is being produced; and an integral boiler water measure utilizing a weep hole in the wall of the boiler for providing an indication of the correct boiler water charge to the operator.