Abstract: A clevis type connection device has one leg thereof formed with a "blind" bore opening and another leg thereof formed with a through-bore opening, which is arranged in axial alignment with the "blind" bore opening; the bore openings thereof being sized to rotatably support opposite ends of a load engaging pin. The load pin is either removably retained or permanently installed within the bore openings.

Abstract: The present invention relates to an entertainment center cabinet featuring n assembly serving to mount a television receiver or the like such that it may be moved outwardly of the cabinet through a front opening thereof and rotated as desired to permit viewing of the receiver at various angles relative to the cabinet. The assembly is fitted with caster devices to prevent forward tilting of the cabinet when the receiver is withdrawn for viewing purposes and a front rail, which cooperates with a cabinet closure or door, to fully close the front opening of the cabinet when the receiver is stored therewithin.

Abstract: A double ended chain engaging device useful as a chain-to-chain connector or as a chain shortener used to engage different parts of the same interconnected link type chain. A first chain grappling hook member formed with an eye end is articulately joined to the clevis end of a second chain grappling member by a load bearing pin.

Abstract: There is disclosed a method for more safely conducting an underground mechanical mining operation such as typically employs successive drilling, blasting, and product removing processes against a mine work face which is conducted from within an open mine room or the like in an underground deposit of salt. Such materials are per se impervious to fluid transmission therethrough but as they occur in underground deposits vicariously include pockets of or channels for outlet from traps of pressurized fluid accumulations, such as would be dangerous to the mining operation if inadvertently encountered incidental to the routine drilling and blasting processes.

Abstract: A file cabinet having drawers and doors and an anti-tip lock mechanism that simultaneously locks all closed doors and drawers when in a locking mode and that permits movement of a single drawer from its closed to its open position while simultaneously locking both the remaining unopened doors and all of the other drawers against movement from their closed to their open positions when in an unlocked mode.

Abstract: A platen press having a vertically extending sleeve of filter cloth arranged intermediate a pair of vertically disposed cooperating press platens supported for relative horizontal movement for squeezing a charge of fruit contained within the sleeve, is provided with an improved hopper supply assembly for effecting batchwise charging of the sleeve with fruit to be pressed and an improved upper valve assembly cooperating with a lower valve assembly for clamping off upper and lower ends of the sleeve to retain the charge of fruit therewithin during a pressing operation.

Abstract: A mixed resin system is disclosed which, when cured by a crosslinking agent which is a polyfunctional amine or amide, yields a tough, flexible product having excellent chemical resistance and high temperature resistance as well as the ability to adhere well to virtually any substrate incuding metals and Portland cement or concretes based thereon. The resin system is a mixture of furfuryl alcohol homopolymer and epoxy resin in various weight ratios dependent upon the physical properties desired.

Abstract: A rolling bearing type traction wheel and hub assembly which is especially adapted to ride upon either flat (i.e. horizontal) or laterally sloping surfaces such as trolley trackways and/or the opposite side flanges of supporting I-beams or the like; the axis of wheel rotation being in any case canted relative to the support surface. The wheel assembly comprises a generally cylindrical shaped inner bearing race/hub member which is fixed to an external support and is encircled by a rotatable outer race/wheel member, with rolling bearings enclosed therebetween. The wheel and hub parts are formed of sheet material and are so shaped as to novelly facilitate initial assembly thereof. When the device is operating under load the parts automatically float into self-aligning operational relationship and are retained in proper operative relationship without need of any auxiliary retention device.

Abstract: A clevis type hook has one leg formed with a partially closed bore opening and another leg formed with a through bore opening arranged in axial alignment with the partially closed bore opening; the bore openings being sized to loosely rotatably support opposite ends of an oval load pin whose width diameter permits non-rotative slip-fitting within a load chain link. The load pin is removably retained within the bore openings by a retaining device fixed to the other clevis leg.

Abstract: An R.F. resonant cavity filter for connection in a transmission line and multicouplers utilizing same, said filter adapted to pass only signals of a predetermined frequency into and out of a branch transmission line, to block signals of said predetermined frequency from propagating down said transmission line in one direction but not the other, and to pass all other signals substantially undisturbed.

Abstract: An adapter is provided to facilitate quick change mounting of rotatable grinding elements without the use of a tool, such as a wrench or key.

Abstract: A rolling trolley device adapted to ride upon opposite side flanges of a support beam; said trolley device comprising a generally V-shaped load supporting yoke bar of one-piece formation carrying at the opposite legs thereof a pair of generally tubular-shaped trolley wheel support housings; wheel support members extending from said housings at opposite sides of the legs of said bar; and support beam engaging wheels mounted upon said support members; said housings being keyed to said yoke bar legs in positionally adjustable relation thereon to adapt said device to operate efficiently on a large variety of support beam sizes and flange width and slope configurations. The trolley wheels are carried by said housings so as to rotate about axes which slope away from and into acute angle intersections with the planes of the trolley wheel contact/support surfaces; thereby directionally balancing out the thrust load and reaction load forces to provide an improved wheel tracking operation.

Abstract: A pressure switch unit capable of withstanding high pressures without losing its low pressure sensitivity or calibration includes a magnetically actuated switch responsive to the magnetic field of a permanent magnet mounted on a hermetically sealed bellows which contains on its interior a substantially incompressible liquid. The amount of liquid hermetically sealed within the bellows is selected to be sufficient to prevent any portion of the bellows from exceeding its elastic limit when the bellows is compressed by exposure to excessively high pressures.

Abstract: A supersonic diffuser for diffusing a low pressure radially expanding supersonic flow to a subsonic flow of increased pressure. In applications having cylindrical geometrics, the diffuser includes a plurality of radially extending, angularly spaced vanes having blunt leading edges which function to generate a detached upstream bow shock.

Abstract: A fletching element for an arrow includes relatively small leading and relatively large trailing guide vanes joined in spaced relationship by a mounting rib; the mounting edges of the guide vanes and the rib being adapted to be fixed to the rearward end of an arrow to assume a generally helical twist. Preferably, the spacing between vanes is such as to permit the rear edge of the leading vane to be arranged essentially in an adjacent annular offset relationship relative to the front edge of the trailing vane.

Abstract: A guided expansion joint (1) for fluidically connecting two pipes (2,3) in sealed relationship includes low friction annular guides (11,12) at each end of the expansion joint (1) intermediate the slip (4) and the external sleeve (5). A conventional stuffing box (18) provides the seal between the external sleeve (5) and slip (4) while the annular guides (11,12) protect the slip (4) against wear and scoring in the event that the slip (4) and external sleeve (5) depart from the preferred aligned relationship.