Abstract: A generally hollow packing element of relatively high surface area having a plurality of open end tubes situated radially within and connected to one another. At least two of the tubes have walls with or without openings therein extending around and inclined relative to each other and at an angle to a central axis of the body. A plurality of ribs are angularly spaced around the axis and include ribs extending between the walls, ribs projecting from and beyond an end of an outer tube and ribs extending from the central axis which divide the body into a plurality of sectors and chambers. Whether stacked or randomly dumped into a vessel the majority of the surface area of the body is inclined and neither parallel nor normal to the axis of the element or the vessel.

Abstract: A fall prevention safety climbing device for workmen ascending and descending ladders on tall structures comprises a sleeve including a locking pawl adapted for attachment to a workman's safety belt, movable along a continuous supporting guide rail fixed to a ladder and for automatic locking engagement with the supporting rail to arrest a workman's fall. The supporting guide rail is provided at predetermined intervals with notched sections adapted to allow disengagement in a specific safe manner of the otherwise entrapped sleeve and attached climber from the supporting guide rail. Hence, a climber can disembark at the desired platform, or level of the structure to allow another climber to pass on by to another level and thereafter reconnect himself and the attached sleeve to the supporting guide rail.

Abstract: A safety cap has an energy absorbing suspension including crown straps for supporting engagement with the crown of a wearer's head connected to elastically deformable, rupturable and controlled plastically deformable portions of connecting means attached to anchor means in the shell of the cap. The connecting means have end portions adapted to be attached to and wedgingly engage the anchor means. The shock or impact of a blow against the shell suspended on the resisting wearer's head is partially absorbed initially by a wedging action which continues until the end portions are fully seated relative to the anchor means. Further, loading causes the crown straps to pull against, deform and bend energy absorbing portions of the connecting means into adjoining apertures of predetermined size and shape. Finally, at a predetermined force, the bending moments at opposite ends of the energy absorbing portions exceed the tensile yield strength of the material and causes the portions to rupture.

Abstract: A rotary masonry saw has a platform supporting a rotatably driven abrasive saw blade pivotable relative to a work support on a support frame. To position and rock the saw blade, the platform is pivotally linked to an adjustable feed screw and tripivot lever mechanism pivotally mounted on and movable with an upwardly biased foot lever pivotally mounted on the frame. Also provided, is a self leveling saw blade guard mechanism including a guide member having arcuate slots extending between opposed arcuate surfaces in supporting retaining and guiding engagement with grooved follower means attached to the guard. A disconnectable link bar pivotally connects the guard to the frame, pivots and maintains the lower edge of the guard substantially horizontal during pivotal movement of the platform and saw blade.

Abstract: A grinding wheel mounting in which the wheel has a mounting hole of polygonal form into which is removably and coaxially inserted a corresponding polygonal shaped portion of an elastically deformable plastic body engaging the internal polygonal surfaces of the wheel. The body has a flange at one end in engagement with one side of the wheel and screw threads at its opposite end threadedly engaging with a slight interference fit, a threaded end portion of a grinding wheel spindle having an annular surface in clamping engagement with an opposite side of the grinding wheel. Upon screw threading the body together with the grinding wheel to the spindle, the grinding wheel is axially clamped beteen the flange on the body and the annular surface on the spindle and the body is slightly deformed radially by the interfering threaded portions thus eliminating axial and radial play, friction, slippage, wear and abrasion of the spindle threads.

Abstract: A lens grinding machine with a radially adjustable work holder on which various sizes of lens carriers with lens blanks to be ground, may be mounted and moved at various predetermined radii across the peripheral abrasive surface of a radially adjustable grinding wheel rotatable in a plane normal to a plane of movement of the lens blanks. The grinding wheel has a slotted support center with flexible and resilient deformable walls supporting bonded abrasive segments containing alkali insoluble metal coated abrasive in an alkali soluble metal bond and is mounted on an arbor adapted with means to clamp the wheel and to vary the shape of the deformable walls and radius of the wheel.

Abstract: A low flow liquid distributor for liquid/gas contact apparatus having a liquid feed splitter dividing the flow into a plurality of streams, an array of troughs extending across the cross sectional area of the contact apparatus, below the splitter, collects the plurality of streams and further divides the flow into a greater number of streams. A shallow pan situated under each of the troughs collects the streams and has upturned sides with drain openings extending upwardly from at least the junction with a downwardly sloping bottom of the pan of greater number than the streams deposited in the pan whereby low rates of liquid flow are obtainable and uniformly distributed onto a bed of tower packing for contact with a gas flowing therethrough.