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| Number | Title | Issue Date |
| 4101103 | Cradle type conduit hangers A conduit hanger includes an inverted U-shaped bracket having laterally spaced depending legs swingable supporting at their bottoms closure arms. The closure arms are swingably between a closed position extending toward each other and gravity urged toward... | 07/18/1978 |
| 4019762 | Raintight connector for electrical conduit A vapor-proof connector on a metal electrical conduit includes an externally threaded tubular body engaging the end of the conduit and a gland nut spaced inwardly of and engaging the tubular body. The gland nut has an inwardly directed peripheral flange w... | 04/26/1977 |
| 3991446 | One piece knock-out plug A closure or bushing member for openings in electrical boxes, conduit ends and the like is formed as an integral unit of a thermoplastic synthetic organic polymeric resin and includes a disc or annular shaped head and a coaxial hollow cylindrical shank of... | 11/16/1976 |
| 3988052 | Ground clamp An electrical conduit grounding device includes a clamp formed of a pair of similarly shaped screw connected clamp sections each formed of a web including a crowned medial section terminating in coplanar wings and provided with longitudinal flanges. One o... | 10/26/1976 |
| 3985411 | Hinged ground clamp An electrical conduit grounding assembly includes a grounding cable parallel to and laterally offset from the conduit and a pair of longitudinally extending dihedral angle clamp members provided with longitudinally serrated confronting concave faces which... | 10/12/1976 |
| 3967872 | Cradle-type ground lug for conduit A cradle type wire grounding lug is secured to the periphery of a conduit fitting such as a bushing. The lug has a body with a generally C-shaped cross section for the wire clamping portion and has a mounting tang extending outwardly and angularly offset ... | 07/06/1976 |
| 3951504 | Electrical cable stress transfer device A device for transferring the pull on an electrical cable to an anchor point includes a clamp having a cable engaging collar with a tapered bore engaged by a wedge whose advance clamps the cable. The collar is connected by a chain or plastic extension mem... | 04/20/1976 |
