Abstract: An apparatus for raising and lowering a windable, portable motion picture screen which has a sliding pole inserted into a vertical opening within a hollow support cylinder in such a way that the sliding pole can slide up and down within the cylinder. A lever member is provided on the upper portion of the supporting cylinder to force against the sliding pole within the cylinder and hold it in position. The sliding pole is provided with a rack portion on one side thereof and rack and pinion gear drive means are connected to the side of the supporting cylinder in such a manner that they engage the rack portion of the sliding pole to move it up and down within the supporting cylinder as the gears are rotated.

Abstract: A surgical chair for a doctor embodying an infinitely elevationally adjustable seat connected with a support column, a stand tube arranged within the support column, at which there is attached a base frame equipped with rollers and a lifting device within the stand tube. The lifting device is operatively connected with the support column and can be unblocked by a lever system so that the seat, depending upon the degree of loading thereof, is elevationally adjustable. A foot pedal located between two overhang members of the base frame is arranged with its upper edge at most 4 centimeters above the floor and with adjustable freedom of movement with respect to the floor. The foot pedal is secured by a lever to an angle lever pivotably mounted at the stand tube and acts upon a plunger of the lifting device. At least three guide grooves are provided at the support column and extend uniformly about its inner periphery and parallel to its central axis.

Abstract: A controllably deformable fastener assembly has a fastener, clamping means, and a crushable element. The fastener has a threaded shank portion, a head portion and a shoulder portion on the head portion. The shank portion is of a material having a preselected tensile yield load. The clamping means is provided for screw threadably receiving the shank portion of the fastener, including a shoulder portion that is movable towards the shoulder portion of the fastener for securing a first member to a second member. The crushable element is disposed therebetween and is of a material that is controllably plastically deformable at a preselected load which is less than the preselected tensile yield load of the shank portion of the fastener.

Abstract: A handle for a paint brush or similar tool which facilitates the removal of the paint brush from a display device where the brushes are stacked on a cantilever-type display arm. The paint brush handle includes a generally vertical slot adapted to slidably engage a flat, generally vertically oriented cantilever arm to maintain the brushes in general relative alignment along the arm. The slot in each paint brush handle includes a pair of upwardly converging canted surfaces on the bottom end of the slot to facilitate removal of the brushes from the cantilever arm, for example by a customer desiring to purchase a brush. The paint brush handle may include a hollow interior, or the handle may be solid throughout in which case the canted surfaces terminate in a generally central crown. A generally circular aperture is provided at the upper end of the slot to define a "keyhole" slot so that the brushes also may be displayed on a hanger having a circular cross-section.

Abstract: A dining room table to facilitate serving food including inner, intermediate and outer concentric sections. The intermediate section is rotatably mounted on a pedestal to pass food around the table. The outer section includes a plurality of arcuate segments abutted about the intermediate section to provide a dining surface. The inner section supports a center piece and is fixed to the pedestal within the intermediate section.

Abstract: A portable tamperproof and battery-powered alarm device used for locking in place, objects which need to be restrained from theft. The device is ideal for locking bicycles, mini-bikes, motor cycles, and the like, due to its portability and versatility. The device includes a casing for an alarm and operative circuit therefor and an object-restraining member. Once the device is activated by an internal switch, any interruptions of the circuit, such as breaking of the restraining member, cause an audible alarm to sound continuously until the device is manually reset. The locking and alarm device is a completely separate unit from the object-restraining member, and thus the latter may be readily replaced as needed.

Abstract: An adjustable table wherein front and rear legs open to provide a rigid support for a pair of pivotably mounted upper legs, to which a table is pivotably attached; slotted arms adjust the position of the upper legs with respect to the front legs; and slotted arms adjust the position of the table with respect to the upper legs; a bar spaces the front legs apart and a smaller space the upper legs aparts; each bar encloses a rod with a threaded end for a thumb nut to cinch a slotted arm in a preselected position for holding the table.

Abstract: An article-holding, double-sling kit comprising four strips of thin, flexible material. Each one of a longer pair of strips contains a plurality of apertures along its entire length and through which hanging line is interlaced. One of these longer strips contains at least two parallel slots, proximate its center, through which the second is interwoven in crossed configuration. These strips are flexible in one direction and substantially rigid in the 90.degree.-opposite direction. Of the second pair of strips, shorter than the first pair, each containing a plurality of apertures, a first is foldable upon itself and serves as a slide to gather the double-sling hanging lines proximate to the article; the second shorter strip functions as a cleat through the apertures of which the four ends of line are reversibly interlaced to form a hanging loop.

Abstract: A collapsible easel for artists and the like to support canvases, artists' boards and otherwise comprising a horizontal frame member having an upright support extending therefrom, two pairs of legs respectively pivotally movable from compact positions extending from said frame member in the same direction as said support to positions extending downwardly from said frame member and at an acute angle to each other, and a pair of panels hinged suitably along one edge to each other, one panel being hinged to said frame member and positionable substantially horizontally to form a shelf and the other panel extending downwardly and inwardly to position the lower edge adjustably along the forward pair of legs to form a brace for said shelf panel and said panels being disposable in planar relationship and movable into overlying position along the front face of said upright support so as to overlie a painting or drawing supported by said support and thereby protect the same.

Abstract: A mechanism is disclosed for providing a lateral adjustment capability for anchors used to support engines or transmissions in dynamometer test stands or the like. The mechanism is comprised of an arrangement including a housing and a cylindrical slide member, adapted to be reciprocated in a laterally extending socket formed in the housing. The position of the slide is adapted to be adjusted in the socket by virtue of a threaded engagement with a capscrew carried by the housing at one end of the socket, and is locked in any adjusted position by a pair of threaded bolts, passing through the slide and socket walls and which are advanced into one of the socket walls to squeeze together the corresponding surfaces of the socket and slide member. The housing may be fastened to an anchoring device or directly mounted to a base plate or other supporting surface.

Abstract: A mirror assembly for a motor vehicle, in which a mirror backplate is angularly adjustable by an electric motor and drive mechanism. The mirror backplate is pivotably connected to a motor drive casing with a secure yet releasable interconnection that includes a central stud on the backplate, locating structure for the stud on the casing, and a coupling member for releasably securing the stud to the casing. The central stud and two extending screws on the backplate are universally pivotable and integrally formed with the backplate. The screws are driven axially relative to the casing by motor driven rotated nuts within the casing to pivot the backplate and a supported mirror about the central stud.

Abstract: A portable desk for the convenience of invalids, traveling men or others who do not have access to other desk surfaces. The lower portion of the desk is a pillow-like portion of flexible material which forms a yieldable container which is partially filled with a dry, flowable material, such as expanded styrofoam beads, particles or the like. The casing portion is secured at the top to a piece of sub-covering of suitable size, which in turn is secured to a hard, planar sheet of material by adhesive, glue or other suitable means. The styrofoam beads may be shifted or shuffled about until the pillow-like portion adjusts to the contour of the surface on which it is to be used. An upstanding abutment secured along one side of the desk top forms a stop for books, pencils and the like to rest against.

Abstract: A folding seat assembly comprising a seat, a fold-away base for said seat and disposed under the seat, a pivoting support unit hingedly attached to a floor for rotation about a first axis, the support unit being shaped for permitting rotation of its forward side in a forward and downward direction and an upper frame adjacent the upper end of said support unit and pivotally attached thereto for pivoting about a second axis disposed upwardly and rearwardly from said first axis, the upper frame having legs at its rearward portion, and means attaching the underside of said seat to the upper side of said upper frame, whereby the upper frame and the support unit can tilt upwardly and forwardly together about the first axis and then the upper frame can move forwardly while pivoting about the second axis as the support unit rotates also about said first axis, the support unit having a stop means on it engageable by part of the attachment assembly so that when the rearward end of the seat or attachment assembly is rai

Abstract: A first element is adapted to be received and anchored in a hole of a structure; and a second element has a first portion located in the hole and secured in the first element, and a second elongated portion which extends outwardly from the hole. An adjustable element is mounted on the second portion for movement in direction of the elongation of the latter and is operative to position an object on the second portion at any of a plurality of distances from the structure. In order to protect the first and second elements from corrosion, an axially yieldable protective sleeve which surrounds the aforementioned second portion intermediate the structure and the object is provided with a tubular end section which sealingly engages a tubular extension section which is provided on the adjustable element. At least one of these sections overlaps the other and thereby provides mutual sealing contact at any of the distances which has been selected for the object.

Abstract: A combination lock includes a plurality of ratchet wheels which are moved to a lock-open position by the operation of a removeably mounted finger dial, which is similar to a telephone dial. Operation of the finger dial moves a pawl which travels in a row of circular tracks, each in alignment with a ratchet wheel, with the pawl moving in succession from track to track to rotate individual ratchet wheels as successive numbers are dialed.

Abstract: An insert for installation in a hole therefor in a parent material by relative axial movement of the insert and material with or without the aid of heat, such as by high frequency vibration, wherein the insert has a series of external uniform diameter annular peripheral taper portions each tapering down towards the leading end of the insert and longitudinally serrated to provide projections for barb-like retention of the insert in the hole; and a reduced diameter pilot portion at the leading end of the insert having an external lip of substantially less diameter than that of the taper portions, which lip engages the hole in order to assist initial axial alignment and contact of the insert with the hole at the commencement of installation of the insert therein.

Abstract: An improved fastener of the sheet metal type for anchoring coverings to soft, not-fully cured cementitious masses, has a head or cap portion and a hollow shank portion comprised of a pair of generally U-shaped, opposed legs, one leg being substantially fully enclosed within the other, one such leg being rigidly fixed to said head, the other leg being hingedly connected to the head whereby the rigid leg ensures proper alignment of the head with the surface of the covering material and the hinged leg is caused to spread upon installation and thereby lock the fastener within the cementitious mass.

Abstract: A manually operable four-way seat adjuster mechanism comprising a horizontally movable carriage assembly, and a seat assembly connected to said carriage by bell-cranks. The bell-cranks at each side of the carriage assembly are connected by links, at least one of which in turn is provided with notches, and a correspondingly notched latch lever retains the link in adjusted latched position. Torsion bars interconnect bell-cranks at opposite sides of the carriage, each comprising a rod extending through a closely fitted tube, the ends of which are fixed to the bell-cranks. The ends of the rods are flattened and fixed to opposite sides of the carriage. A strong balance spring assists the bell-cranks, and the geometry is such as to provide a substantially uniform lifting torque to the seat throughout its range of adjustment.

Abstract: A cap assembly for a bolt having a head and a threaded shank with a nut threaded on the shank including a metal retainer member of substantially U-shape having a base portion and a pair of legs extending therefrom. Each of said legs has a pair of relatively sharp vertical edges thereon and a threaded opening in the base portion for threaded engagement with the bolt. A metal cap member having a top wall portion and a cylindrical wall portion is fitted over the legs of the U-shaped member. The cap and retainer are dimensioned so that when the cap member is assembled on the retainer, the legs of the retainer will be compressed inwardly slightly so that the inherent resiliency of the legs will serve to create a tight frictional engagement between the legs and the cap.

Abstract: A bracket for mounting mobile electronic equipment having L-shaped slots for receiving mounting studs attached to the equipment and wire spring elements across one or more of the slots for latching the studs into the "feet" of the L-shaped slots.