Abstract: A scaffold for locating workmen and materials inside a railroad car includes a pair of ladders hanging from the roof of the cars through apertures therein, and a plurality of planks disposed across the gap between the ladders and supported at their ends by the ladders.

Abstract: A tap selector anti-arcing system is used with rotary tap selectors to prevent arcing as the selectors move from one tap to the other. A lockout mechanism includes a pair of lever arms located adjacent two Geneva gears. The Geneva gears include pins disposed on opposed sides thereof to actuate one lever arm to thereby move the other lever arm to interferingly engage the pin on the other gear if the gears move simultaneously to engage the neutral and eighth taps. An interrupter is opened by linkage connected to a cam disposed on the drive mechanism for the Geneva gears to open the circuit during the movement of the Geneva gears from one tap to another.

Abstract: The tape measure includes a lock for locking the tape in an extended position from its case. The lock includes a toggle pivotably mounted on the case and a lock shoe extending from one end of the toggle to a position adjacent the tape. The case includes guides, such that when the toggle is depressed, the lock shoe is forced against the tape so as to wedge the tape between the lock shoe and the case to prevent its retraction.

Abstract: The speed wrench includes a plastic handle and a S-curve shaped shaft with a mount to receive tool driving or drilling inserts. The S-curve shaped shaft causes the axis of the tool to intersect the axis of the handle, thereby causing a cone-shaped pattern of rotation. The shaft permits the user to rotate the handle with wrist motion, thereby rotating the tool insert.

Abstract: A high frequency four-way valve reciprocated by hydromechanical amplifiers has its amplifier volumes volume compensated by passage means in each valve spool end connecting each amplifier volume with the adjacent outlet port. In a modification, there are longitudinally extending grooves on the outer periphery of each drive piston, one group of longitudinal grooves connecting the amplifier volume with the annular lubrication grooves around the piston and another group of longitudinal grooves connecting the annular grooves with the adjacent outlet port. The longitudinal grooves supply lubricant to the annular grooves, and also enhance the volume compensation.

Abstract: A recoverable or permanent rigid subsea form having retaining walls to contain fill material to stabilize, raise and/or provide a level surface above the sea floor. Portions of the retaining walls comprise hollow tanks that are alternately flooded and emptied to control the buoyancy of selected portions of the form. Alternatively, the retaining walls comprise solid plates. Means are provided in the retaining walls for allowing offshore equipment to pass into and out of the form.The form is set in place on or below the sea floor and the fill material is placed in the form. The fill material is leveled by gravity or other means to form a level surface at the desired elevation. Drilling and/or production equipment can then be placed on the level subsea surface.