...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5291708 | Modular framing system A modular framing system having a plurality of framing units between which panels may be retained. Each framing unit includes a main body having a plurality of circumferentially spaced receiving chambers having semi-circular configuration. One or more pan... | 03/08/1994 |
| 5285613 | Pultruded joint system and tower structure made therewith This joint system is provided primarily for connecting elongated structural members which are made of materials which deter the use of conventional fastening techniques, and specifically for joining pultruded composite structural members composed of, for ... | 02/15/1994 |
| 5271685 | Screw connection between rods and joint members of a three-dimensional space framework or the like A connection assembly having a rod, a joint member with a threaded bore therein, a tapered end piece with a recessed axial through-hole therein, and a set screw received in the through-hole and having a threaded screw end which extends out from one end of... | 12/21/1993 |
| 5259685 | Rigid intersection connection A rigid intersection connection including three intersecting elongated wood structural members and a rigid connector made from a single sheet metal blank which requires no welding. The rigid connector includes a pair of angular members joined in angular r... | 11/09/1993 |
| 5251994 | Device for a connection element A guide device including a bolt (5) which through a sleeve insert can be fastened rotatably to one end of a rod (21), which bolt is connected, sliding axially, to the front part of a guide sleeve (16') in such a way that a rotary movement of the guide sle... | 10/12/1993 |
| 5224320 | Space frame system A joint connector for a space frame comprises two pairs of opposed brackets having seats for the transverse chords of the grid. Upon securing the brackets one to the other a housing encompasses the intersection of the transverse chords therein. An apertur... | 07/06/1993 |
| 5190392 | Robot-friendly connector Robot-friendly connectors, which, in one aspect are truss joints with two parts, a receptacle and a joint, the joint having a head which is loosely inserted into the receptacle and is then tightened and aligned; in one aspect, the head is a rounded hammer... | 03/02/1993 |
| 5186567 | Quick-connect fasteners for assembling devices in space A quick-connect fastener of a relatively-simple straightforward design is arranged with a tubular body adapted to be engaged against an attachment fitting in coincidental alignment with an opening in that fitting. A tubular collet having flexible fingers ... | 02/16/1993 |
| 5184920 | Connection element for a rod A connection element for a three-dimensional framework includes a bolt (6, 7, 8, 9) which by means of a sleeve insert (3) can be fastened rotatably to one end of a rod (11), as well as a sleeve (12) into the axial through-bore of which the bolt is partly ... | 02/09/1993 |
| 5165214 | Space frame A space frame of double-layer flat grid type, in which the upper grid is skewed or angularly displaced by 45° relative to the lower grid, has pairs of oblique struts (16) connecting the lower grid nodes (14) to the upper grid nodes (15). At a lower grid ... | 11/24/1992 |
| 5161344 | Portable display structure A portable display structure comprising a number of upright columns joined by a number of horizontally extending beams, the columns and/or beams being formed in a similar manner of a central structural member made of a number of units and each unit compri... | 11/10/1992 |
| 5145275 | Truss beam coupler A node coupler for interlocking truss beams of a self-standing structure. The coupler includes at least one pair of diverging elongated arms. Each arm has a cylindrical inner end portion and a thin outer end portion, engaged into the cylindrical hollow of... | 09/08/1992 |
| 5144784 | Wall with elongate members The wall contains elongate members (1) which are connected to one another by means of junction pieces (2). Each member (1) has a tubular portion (7) and at least one endpiece (10). That part (12) of the endpiece (10) located outside the portion (7) is equ... | 09/08/1992 |
| 5141351 | Joint device of truss structure member A device for joining an elongate structural member having a hollow end to a connector node includes a cover for the hollow end and an elongate bolt extending a threaded end therethrough for engaging with the node. A portion of the bolt between the threade... | 08/25/1992 |
| 5134816 | Beam clamp assembly for conservatories This invention is a beam clamp assembly (100) for use in conservatories where the roof beams (108) radiate from a central part. The beam clamp assembly (100) of the present invention allows use of beams (108) with end surfaces cut at right angles to the l... | 08/04/1992 |
| 5127759 | Continuous connector The present invention relates to a connector for a tubular truss assembly which is formed of tubes loosely fit between selected adjacent ones of the connectors. The tubes are held in place either by a set screw in connector receptacles into which the tube... | 07/07/1992 |
| 5127758 | Pipe joint A pipe joint for joining several pipes used in a pipe grid structure such as a scaffold. Each pipe (3) is connected, by way of a connecting member (17) inserted into its interior from the end of the pipe and by way of a clamping device (16) composed of tw... | 07/07/1992 |
| 5115623 | Display system A hinged three-dimensional display system primarily intended for advertising and display purposes, is constructed of bars or tubes and connecting pieces, the bars or tubes being pivoted to each other in pairs at their mid-points and forming crossing diago... | 05/26/1992 |
| 5116193 | Coupling for three-dimensional framed structure A three-dimensional framed structure is built up by interconnecting rod members end to end by knuckle members. Each rod member includes, at either end, a sleeve in which a connecting bolt is axially inserted from the inner side, and a rotary member dispos... | 05/26/1992 |
| 5113538 | Hammock stand and brackets for assembling same A hammock stand is described which consists of three elongated structural members joined together axially at oblique angles by means of a unique pair of brackets. Stabilizing cross pieces are also attached transverse to the longitudinal axis of the three ... | 05/19/1992 |
| 5097645 | Space frame system The construction system of the present invention comprises a plurality of connectors and a plurality of struts, each of the connectors including three discrete flat elements interconnected in three mutually perpendicular planes, each of the three flat ele... | 03/24/1992 |
| 5088852 | Pinned type connector means for lattice space structures A pin connector means for removably affixing structural members to central nodes enabling the erection of structural latticeworks is disclosed. The pin connector means includes a ball-ended bolt, a bearing seat, and a means for coupling a spherical ball o... | 02/18/1992 |
| 5076724 | Structural connector This invention relates to a connector for the elongated elements of a structural space frame, and to a space frame employing the connectors. The connector consists of a base element and up to two elongate connector members. The base element includes both ... | 12/31/1991 |
| 5074700 | Modular coupling for use in frameworks, scaffoldings and the like A coupling wherein a spherical or ring-shaped female coupling member has sockets for pins at the ends of rod-shaped male coupling members. Each pin has a conical displacing portion in front of a cylindrical peripheral surface which is formed with a pair o... | 12/24/1991 |
| 5074094 | Nodal point connection The nodal point connection has a nodal body (10) having bearing grooves (11-13) and coupling parts (18) which are insertable into the bearing grooves in a positive-locking manner, and spreading springs (17.1-17.4) which are arranged between the nodal body... | 12/24/1991 |
| 5056291 | Modular system for space frame structures The invention is embodied in a modular system for making structural frameworks in which crystal-like hubs are used to connect lightweight struts in a variety of configurations. The hubs are comprised of uniform nodes and cylindrical trunnions, several emb... | 10/15/1991 |
| 5054950 | Fastener for construction systems comprising tubes and nodes A fastener for construction systems, especially for exhibition booths, comprising tubes and nodes, with one screw attaching to a tube and another attaching to a node. The tube-attached screws are accommodated axially aligned in a sleeve that surrounds at ... | 10/08/1991 |
| 5051019 | Space frame assembly A space frame node and connector assembly is provided in which the node is provided with a series of sockets each of which is formed into an inner and outer part, the inner part being screw-threaded for receiving a screw-threaded spigot portion of a conne... | 09/24/1991 |
| 5046883 | Connectors for space frame structures A node-connector for a space frame structure includes a base plate divided into a plurality of equal sections by a corresponding plurality of double-wall partitions joined to the base plate and to each other at the center of the base plate and extending p... | 09/10/1991 |
| 5013176 | Continuous connector The present invention relates to a connector for a tubular truss assembly which is formed of tubes loosely fit between selected adjacent ones of the connectors. The tubes are held in place either by set screws in connector receptacles into which the tubes... | 05/07/1991 |
| 5007762 | Releasable locking mechanism A releasable locking mechanism comprising a pair of interconnecting members. One of the members has a cavity for receiving therein a terminal end on the other member generally configured to the cavity. The terminal end is laterally placed in the cavity an... | 04/16/1991 |
| 5007220 | Non-periodic and periodic layered space frames having prismatic nodes A family of space frames formed from one or more parallel, planar layers, with each layer comprising a plurality of prismatic nodes arranged in a spaced, non-periodic or periodic, planar array and a plurality of struts coupling adjacent nodes together. Ea... | 04/16/1991 |
| 4998842 | Overcenter collet space station truss fastener A quick-connect fastener is arranged with a tubular body that is arranged to be engaged against the exterior surface of a hollow attachment fitting and coincidentally aligned with an opening in the fitting. A collet having normally-contracted fingers with... | 03/12/1991 |
| 4997304 | Connector There is disclosed a method of connecting tubes using a connector which comprises a body 41, through which is positioned a screw 43 having a head 44 and a threaded stem 45. A resiliently deformable member 413 is positioned on the threaded stem and a washe... | 03/05/1991 |
| 4974986 | Connector for variable-shape spaceframe structural system A highly variable and economical spaceframe structual system is provided wherein the ends of elongated frame members have fixedly attached spherical, ball-shaped ends which, in turn, fit into spherically-shaped recessed sockets in the connector joint. The... | 12/04/1990 |
| 4970833 | Arched tubular frame building construction An arched tubular frame for building construction includes a plurality of box beams comprised of double edge abutting, welded C-beams coupled together by internal nut/bolt combinations which are hidden from view and not exposed to the elements. The lower ... | 11/20/1990 |
| 4969568 | Pen stand A modular construction which is suitable for use as a pen holder is fabricated from a plurality of flat board members detachably connected to each other by connecting members having a plurality of wing pieces disposed at a suitable angle relative to each ... | 11/13/1990 |
| 4963052 | Mechanical end joint system for connecting structural column elements A mechanical end joint system for connecting structural column elements and eliminating the possibility of free movement between joint halves during loading or vibration has a node joint body having a cylindrical engaging end, and a column end body having... | 10/16/1990 |
| 4960343 | Connector for connecting hollow rectangular tubular members A connector for connecting hollow rectangular tubular members. The connector comprises a cube-shaped base member with a plurality of diagonally extending spigots which are adapted to make a press fit within a respective tubular member by engaging appropri... | 10/02/1990 |
| 4951440 | Construction set for the erection of a supporting structure A construction set for the erection of support structures comprises supporting rods and at least one connecting joint containing a plurality of mutually parallel chambers. Cylindrical beads are formed on the ends of supporting rods. Those beads are insert... | 08/28/1990 |