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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7438567 | Safety mechanism, electrical outlet containing same, and method of manufacturing same A safety mechanism capable of blocking an opening to an electrical connection in an electrical outlet includes a safety barrier coupled to the electrical outlet at a pivot point and a biasing member adjacent to the safety barrier. The safety barrier is rotatable bet... | 10/21/2008 |
| 7331804 | Power-source outlet Wobbling of a coil portion of a torsion spring for urging a rotor/cover to a “usage position” is prevented. An outlet cover of an outlet main body has plugholes for insertion of the plug-in terminals of an outlet plug. A rotor/cover is pivotally provided so that... | 02/19/2008 |
| 7258578 | Card connector with locking mechanism A card connector includes a required number of contacts adapted to contact connection portions of the plurality of the memory cards, and a case arranging and holding the contacts therein and having a plurality of inserting holes for the memory cards. The connector i... | 08/21/2007 |
| 7156682 | Electric socket An electric socket includes a rotation unit and a switching cap unit. The rotation unit abuts the conducting units inside the socket. The switching cap unit protrudes from the rest of the socket. The rotation unit may be moved along with the switching cap unit. When... | 01/02/2007 |
| 7158370 | Integrated battery fusing device An integrated battery fusing device for a battery system of the type used as a backup for powering telecommunications equipment. The fusing device includes a fusing assembly and a terminal plate arrangement that integrally mounts the fusing assembly to the battery s... | 01/02/2007 |
| 6932631 | Socket protective cover capable of preventing single-opening insertion A socket protective cover capable of preventing single-opening insertions includes a housing, a sliding base and covers. The housing has insertion openings. The sliding base is capable of transverse displacement in the housing, and has restoring elasticity. The cove... | 08/23/2005 |
| 6764322 | Power plug receptacle having safety cover A power plug receptacle having a safety cover comprises a plurality of sockets each provided with a rotary safety cover. A socket and a safety cover are coupled through inserting a pivot post into a pivot hole and engaging a guiding pin into a guiding slot. A torsio... | 07/20/2004 |
| 6364673 | Electrical outlet cover An electrical outlet cover having a pair of floating socket covers which are resiliently urged toward a first position wherein holes in the floating socket covers are not aligned with holes in the electrical outlet. The floating socket cover must be rotat... | 04/02/2002 |
| 6257908 | Rotating electrical receptacle guard A guard for an electrical receptacle uses a rotating cover to mask the slots in the receptacle. Catch pins engage the cover and hold it in its closed position. Springs means, or similar, automatically return the cover to the closed position. In the prefer... | 07/10/2001 |
| 5997319 | Plug socket A plug socket is composed by a lower housing, an upper housing, a coiled spring strip and a turning tray. In the lower housing are provided with conductive clips. A circular trough is provided in the top portion of the upper housing. A plurality of plug s... | 12/07/1999 |
| 5866846 | Safety electrical outlet A safety electrical outlet including a plurality of raised socket bodies with a respective pair of blade insertion slots for receiving metal contact blades of an electrical plug, a plurality of rotary safety socket covers respectively covered on the socke... | 02/02/1999 |
| 5865633 | Safety socket A safety socket includes one or more pairs of terminals for engaging with a plug and a cover for covering the terminals. The cover has one or more pairs of apertures aligned with the terminals for allowing the plug to engage with the terminals. One or mor... | 02/02/1999 |
| 5793352 | Source coupler for multimedia projection display system The present invention includes a multimedia projection system coupling apparatus having a coupling converter for interconnecting at least one multimedia source and a multimedia projection display system. The coupler system includes at least two source cab... | 08/11/1998 |
| 5743753 | Watertight electrical plug The invention relates to an improved watertight electrical plug. The plug mainly comprises a plug body having a spherical end face and a cover. The plug body includes two curved grooves on the end face thereof and an engaging groove on the cylindrical sur... | 04/28/1998 |
| 5695350 | Extension socket The present invention provides an extension socket with guard plate frame, which comprises a basic stand, guard plates, springs, conducting strips, an upper shell and a lower shell. The feature of the present invention is to employ a guard plate sleeved o... | 12/09/1997 |
| 5624270 | Safety and/or polarizing devices of electric-power connectors An electric-power connector consists of a plug (1) and a female element, i.e. a socket (2), said socket (2) bearing the grounding pin if any and comprising a mask (3) moved by a return means into its closed position in front of said socket's orifices (40,... | 04/29/1997 |
| 5564934 | Connector A connector consists of a connector plug (100) and a connector jack (200). The connector plug includes a plug shell (130) provided in front of a plug body (120) and having a shell aperture (131); a plug shutter (140) provided in front of the plug shell an... | 10/15/1996 |
| 5474464 | Electrical adaptor An electrical adaptor or connector (1) comprising a housing (2), a carrier member (5) rotatably mounted on the housing, a plurality of selectable pin arrays (7) disposed on the carrier member and adapted whereby rotation of the carrier relative to the hou... | 12/12/1995 |
| 5244398 | Safety receptacle A safety receptacle includes a hot terminal and a neutral terminal disposed above two slots on a front cover and separated by a division plate, which is made from an elastic insulating material having two symmetrical bevel side walls, each of which being ... | 09/14/1993 |
| 5122071 | Guardian outlet cover A safety cover plate for an electrical receptacle is provided and consists of a base member having spaced slots therein in alignment with spaced slots in the receptacle when the base member is attached to the receptacle in a wall. A protector member has s... | 06/16/1992 |
| 5049086 | Locking wall plate and plug apparatus An apparatus including a plug mounting a lock plate thereon, wherein the lock plate includes a plurality of downwardly appending locking links spaced apart a predetermined diameter. The mounting plate of the apparatus includes at least one rotatable outle... | 09/17/1991 |
| 4778398 | Safety cover assembly for end connectors A safety cover of simple and economical construction which will automatically return from an inactive position to a covering position responsive to removal of a plug from the related socket openings. This is accomplished by spring-leading the cover by a l... | 10/18/1988 |
| 4743206 | Child-safe outlet plate An improved child-safe outlet cover including a main plate defining receptacle opening(s), a shield on the main plate for each opening having first and second portions, such shield movable between use and non-use positions in which the first and second po... | 05/10/1988 |
| 4584430 | Safety electrical receptacle cover plate A safety electrical receptacle cover plate for dual socket wall receptacles has rotatable shutters adapted for receiving the prongs of a plug, but is normally biased by non-conducting resilient members to close registery with the slots of the socket membe... | 04/22/1986 |
| 4072382 | Safety outlet There is disclosed herein a safety outlet having means which prevent the insertion of objects other than an electrical plug which may engage an electrical contact within the outlet thereby eliminating the hazard of accidental shock. The safety outlet comp... | 02/07/1978 |
