Abstract: A display frame for holding a flat member includes a holding frame portion having a separable frame portion separably secured thereto in a manner permitting separation only by an authorized person having a special tool. The holding frame portion includes a slideway for receiving peripheral portions of a flat member and has a slideway entrance normally closed by the separable frame portion. The separable frame portion is separably secured to the holding frame portion by separable joints, at least one of which includes a locking member completely concealed within the frame and having a movable latch portion yieldably urged to a locked position, and being movable to a released position. A limited access opening through the frame near the locking member provides access to its latch portion with a special tool for moving same to its released position.

Abstract: A window assembly including parallel opposing tracks with a window having an overall width slightly smaller than the width between the leading edge of the tracks, the window being constructed of channel material interconnected at the corners by angle members, a first pair of angle members having inserted therein fixed pivot pins. The second pair of opposing angle members has assembled therein spring loaded latching members having projections adapted for engaging slots within the tracks.

Abstract: This invention relates to a tie member which enables an angle joint to be produced between two obliquely cut hollow members, and consists of two non-deformable parts each of which has two arms adapted to fit into one or other of the hollow members to be joined, and means for moving one part relative to the other to enable them to be moved apart. One of the parts includes two retractable plungers which slide in openings in its arms and which are each subject to thrust from a spring which causes them to project towards the facing wall of one of the hollow members so that they will enter a bore formed in this wall. The arms of the two parts are resiliently connected together, in particular by the springs to prevent the parts from becoming detached from one another.The tie member according to the invention enables a joint to be made under conditions of remarkable ease and simplicity, and automatically ensures that the hollow members are properly clamped against one another.

Abstract: A pair of frame members have ends beveled at an angle of 45.degree. and mated with one another to provide a miter joint. The frame members have perpendicularly arranged plates each having an opening adjacent its one end to provide a separate end portion. A corner angle is mounted on the plates and has a pair of legs each having a projection of a V-shaped cross-section received in one of the openings. The V-shaped projections jointly provide a pair of substantially parallel members for clamping the separate end portions, the parallel members being fastened together by a screw passing therethrough. As the screw is tightened, the clamping members are moved closer to fasten the separate end portions securely together and to press the angle legs against the plates of the frame members.

Abstract: A sheet metal bracket is provided for connecting the side sections of an annular frame. The bracket is in the form of an L-shaped body and include means that permit the body to be secured to the frame. In one embodiment of the invention, each leg of the body is provided with a pair of opposed tabs. The inner or the outer tabs are bent downwardly at a right angle to the plane of the body. In a second embodiment of the invention only inside tabs are provided with the free end of the tabs being bent at an obtuse angle with respect to the remainder of the tab whereby the bent portion of the tab is adapted to engage the outside surface of a second frame that is inward of the first frame. As a modification of the second embodiment each of the tabs is provided with an aperture therethrough so that a suitable fastener may secure the bracket to the outside surface of a second frame that is inward of the first frame.

Abstract: A frame of rectangular shape particularly for stretching a piece of painting canvas, the frame comprising four strips connected between each other at the ends by means of joints of box-like configuration. The joints are made of sheet material and bent to define two converging channels in which the ends of corresponding strips are slidably inserted and retained. A V-shaped spring is inserted at the converging area of the channels and has two legs resiliently acting on the strip ends to cause stretching of the painting canvas held on the frame.

Abstract: A pipe coupling includes a base portion and a plurality of insertion legs integrally extending from the base portion. Each of the insertion legs has the free end rounded and equally spaced longitudinal ridges so as to effect four side friction fits in the inner periphery of a pipe to be connected. At least one of the ridges is given an elasticity by opposing slots longitudinally provided below the ridge and has a round projection at the outer end portion and an upward slant extending towards the inner end. The extremity of the slant defines a sharp point for preventing the removal of the insertion leg out of the pipe.

Abstract: A device for cornerwise interlocking or clamping together elements, said device comprising a base plate mounting two abutments upstanding from said plate, and a supporting means parallel with said abutments, there being movably mounted on said supporting means an angular pressure plate and pivoted upon a transverse pin in a slot in the supporting means an excentric having a lever, said excentric applying when swung to a clamping position a pressure on the pressure plate for the movement of same towards the abutments.

Abstract: A knock-down sectional furniture frame incorporating two frame members and a coupling for fixing the two frame members together with the end of one member abutting the side of the other member. The coupling comprises a metal fitting which fits in the angle between the two members and which is rigidly fixed to a connector element that is insertable into a transverse bore in the one member. One bolt extends transversely through the other member and into an aligned bore in the end of the one member and engages the connector element. Another bolt extends transversely through the other member and engages with the metal fitting at a position spaced from the one member.

Abstract: The invention relates to a corner key reinforcement brace for strengthening the joint between the beveled ends of abutting tubular metal members such as found in the frame of metallic storm or screen doors. The corner key is internally slip-fitted within each of the adjacent, abutting frame members in a manner so that a relatively close tolerance is maintained between the inner walls of both tubular members and the corner key. The corner key is formed of two substantially identical half sections having first and second leg portions disposed at substantially right angles to one another. All of the leg portions are substantially U-shaped in transverse cross section with one pair of corresponding legs having the top edges of the sidewalls thereof bent inwardly.

Abstract: A bed frame especially suitable for a hospital bed construction. The bed rails are provided by one or more extruded metal channel members connected into a familiar rectangular frame. Extruded metal corner brackets are riveted to the corners of the frame. The corner brackets have integral extensions and formations which serve a variety of functions such as for supporting safety side rails and for the bed headboard and footboard members, standards for supporting patient treating equipment, among others. The bracket serves a dual function of strengthening and/or retaining the channel members in the rectangular frame formation and providing means for attaching a variety of different devices to the bed frame.

Abstract: The invention relates to an element having expandable legs for interconnecting the mitred ends of frame sections. The legs of the connecting element are expanded equally by a single forcing means, such as a screw, the axis of which coincides with a line representing the interface between the mitred ends of the frame sections.

Abstract: A pipe-connecting device and pipes connected thereto. This connecting device comprises a base portion and an indefinite number of plate-like inserting members projecting therefrom in any directions, said inserting members each having a width wide enough for making pressed contact with a pipe at its inside periphery. The inserting member is provided at its longitudinal side edges with a pressing portion so as to insert the inserting member pressingly in the pipe thereby connecting the two in such a way that one can not be slipped off from the other.