Abstract: Improvement in a lock fastener comprising a length of compression spring and a housing therefor permanently fastened to a rear portion of the spring, the turns on the front portion of the spring being free for threadably engaging an externally threaded fastener of the same hand as the helix of the spring, the front end of the spring being closed and ground so that upon rotation of the housing, the front end of the spring will threadably engage the externally threaded fastener, whereby to form a lock joint between the latter and the lock fastener.

Abstract: Improvement in a spray bar for metal rolling having a body and a plurality of spray nozzles carried thereon, a flow control valve for the spray bar for controlling the flow of liquid through the nozzles, the valve having a valve body and a valve spool reciprocable in the valve body, a liquid passage in the spray bar, the valve arranged in respect to the spray bar so that a portion thereof extends across the passage and liquid enters the valve from the passage, a yieldable member operative upon the valve spool for biasing it into its closed position, the improvement comprising a moveable member arranged in respect to the spray bar for controlling the movement of the valve spool, an arrangement for applying a variable force on the member so that the movement of the valve spool and the flow of liquid through the valve is directly proportional to the amount of force applied to the member, the member disposed at the rear of the spray bar so that the member pushes upon the valve spool for opening the valve, and the

Abstract: Improvement in a spray bar for metal roller having a layered body and a plurality of spray nozzles carried thereon, the improvement comprising apparatus providing access from the rear of the spray bar to the nozzles for servicing thereof, the apparatus including for each nozzle an elongated housing fastened on the spray bar so that the former projects outwardly from the front face of the latter, an elongated member joined to the nozzle to form a cartridge nozzle which fits in the housing, and an access opening in the rear of the spray bar for inserting the cartridge nozzle into the housing or removing the same therefrom.