Abstract: A tank car bottom unloading valve that meets A.A.R. specifications which can be dually-operated either from above or below the tank, wherein the valve is retained in a heavy, longitudinally sloped mounting flange by a segmented ring which does not interfere with the valve actuating mechanism and yet allows the containment of the valve up inside the tank so as not to result in hazardous protrusion of the body of the valve from the bottom of the tank. Said vale is shut from below by an over-center cam and link mechanism which locks the valve poppet on its seat through a resilient compression spring but which does not lock-up the valve when it is shut from above, so that lower working torque is required by the operator and less maximum stress is imposed on the valve in its operation, and there is less criticality of adjustment upon assembly. A valve actuating lever disengages from the over-center cam and link mechanism for rotation and hookup in an out-of-the-way place below the tank car.

Abstract: A device for propelling a missile toward an object. Said device includes a handle frame having upwardly and rearwardly divergently disposed, bowed arms and a pair of rubber tubes each slidably mounted on a tube carrying arcuate member integrally formed medially on and positioned above the upper end of the handle, the free portions spaced above each of the arms on which a rubber tube is slidable thereon, and a sight integrally formed on the upper end of the handle.

Abstract: A heat exchanger having a number of sheets retained in spaced relationship with one another by projections outstanding from the sheet surfaces. Some at least of the sheets are provided with return flanges and the arrangement is such that return flanges of a sheet lie contiguous with an adjacent sheet so as to define therewith a fluid flow passage. The flanges of the next adjacent sheet are angled with respect to those of the first to define a second passage which extends in a different direction. Two sets of passages are formed thereby and the sheets constitute heat transfer means between adjacent passages. Each set of passages forms a fluid flow conduit. The pack is formed without cementing or welding the sheets together.

Abstract: A simple lockup device for a sign having a square tubular extrusion for a post with grooved webs extending midway up the length of the interior of T-section sidewalls of the same, one sidewall web being slotted through its groove partially down from the top of the post for receiving the flange of a sign panel installed in interlocking relation therewith. A locking key bent of a rectangular strip of sheetmetal engages a vertical slot in the top of the panel flange at its middle and at its conjugate ends engages with the grooves in the webs on adjacent sidewalls of the post. A closing cap inserts four depending lugs in four corners of the top of the post in mounting on top of the same.

Abstract: A manifold mounting pairs of relief valves in side-by-side clusters having a slide-rod interlock cooperating with swing-mounted clapper discs and operationally engaging handles connected thereto for selectively isolating one valve at a time from pressure in the manifold in preparation for its removal and replacement under pressure therefrom.

Abstract: A sheet perforator head having a perforating wheel rotationally supported on a solenoid-operated, toggle-actuated leverage arm and capable of perforating according to program.

Abstract: A testing apparatus for determining and evaluating the sensitivity of propellants and other hazardous materials to electrostatic discharges carried and stored on apparatus or individuals by simulating and controlling their normal force by being exposed to an electrical discharge.

Abstract: A permanently attached lock for wheeled vehicles, such as bicycles or the like, wherein the bolt of the lock extends interiorally of the tubular head and fork stem and is locked therein to prevent rotation of said fork stem. Means are provided for anchoring a wire rope or restraint on said housing to effectively prevent theft of the vehicle when the rope is wound around a metal post or rack.

Abstract: A boiler feedwater conditioning tank for removing mud, iron and any other settleable solids from boiler feedwater and adding soluble chemicals to the same, wherein the feedwater is mixed and heated by passing the mixture down and around and up into and through a system of concentric open-ended standpipes erected within the tank. The outlet for clean feedwater lies at the top of the tank inside the upper end of the inner standpipe, and the inlets for the same lie distributively around the outside of the outer standpipe at the bottom thereof. The input port for chemicals lies in the tank side walls and steam heating coils lie between the outer standpipe and the wall of the tank in the path of convective flow of feedwater up between the same.

Abstract: A safety wrapper and strap protector encompassing the middle of the foot of a person with a trailing strap which is placed over the bottom and back of the heel when the heel is slightly elevated, extending upwardly on the back of the leg and adhesively secured thereto above the ankle to prevent injury to achilles tendon, the posterior ankle joint capsule and other structures at the posterior portion of the ankle and subtaler joint during running and gymnastic exercises.

Abstract: A tire traction chain for automobiles, trucks and the like whereby the same is placed over the tire and secured at one end to arcuate slots in the wheel and at the other end to a lug bolt.

Abstract: A portable, lightweight device for supporting a roll of aluminum sheeting having a stationary lower arcuate-shaped, inverted U-shaped channel member supported on a stand, and an upper arcuate-shaped shiftable channel member having one end pivotally secured to one end of the lower member, adjustable means for retaining the upper member on a roll of aluminum sheeting to retain it between the channel members and adjustable means on opposite sides of said roll to retain it within the members.

Abstract: A knockdown sign lockup device having a tubular interlocking ring for inserting in the top of a tubular signpost and engaging a slot in the top of a wing off the signboard extending within the tubular post for lockup of the signboard with the signposts.

Abstract: A portable, lightweight device for supporting a roll or coil of sheeting having a stationary, lower, arcuate-shaped, inverted U-shaped channel member supported on a base and an upper arcuate-shaped channel member shiftable with respect to the lower member, adjustable means for locking the upper member on the roll of sheeting to retain it between the channel members and lateral adjustable means to retain said roll in the members.