Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7357364 | Mounting devices Support devices are adapted for use to releasably attach mounting items to structures constructed of brick, stone, concrete or cinder block, or other comparable materials. The devices have expander and support portions. The expander portion have two inter-fitting we... | 04/15/2008 |
| 7357363 | Expansion bolt An expansion bolt. A first chock has first and second outer ramping surfaces. A second chock has an inner ramping surface complementarily corresponding to the first outer ramping surface. A spring member biases the second chock radially inwardly against the first ou... | 04/15/2008 |
| 7073981 | Rock stabilizer A rock stabilizer includes a metal tube with a tapered distal end and a flanged proximal end capable of being positioned within a bore in a mine wall. A slit runs substantially the entire length and indentations are formed in the outer surface along the length adjac... | 07/11/2006 |
| 7011281 | Expansion bolt An expansion bolt. A first chock has first and second outer ramping surfaces. A second chock has an inner ramping surface complementarily corresponding to the first outer ramping surface. A spring member biases the second chock radially inwardly against the first ou... | 03/14/2006 |
| 6296430 | Push-in plug The invention relates to a push-in plug (1) made from plastics and having at least one shank (2) to be introduced into a drilled hole, on which shank (2) there are located expansion segments (4) lying opposite one another in pairs, which are braced agains... | 10/02/2001 |
| 5964558 | Expansion dowel An expansion dowel including an expansion sleeve (2, 22) radially expandable upon being compressed and having a slot (5) extending along an entire axial length of the expansion sleeve (2, 22) and inclined toward an axis (A) of the expansion sleeve (2, 22)... | 10/12/1999 |
| 5957643 | Fastening element with expansible member A fastening element has a shaft having a rear end and a forward end with a forward end face, holding means arranged at the rear end of the body for fastening an article to a building component, means forming an expansible region starting from the forward ... | 09/28/1999 |
| 5775848 | Earth and rock anchoring devices Anchoring devices for securing diverse types of structures to the earth or soil, or to rock walls and formations, such as are frequently employed for anchoring gas and petroleum-product pipelines, guy-supported towers, utility poles, large-sized retaining... | 07/07/1998 |
| 5700119 | Nail with spreadable legs A nail with spreadable legs has legs that can be spread apart by a constant angle irrespective of the hardness of the ALC material into which the nail is driven. The nail has two leg members bound together by a washer with their flat sides abutting each o... | 12/23/1997 |
| 5651650 | Attachment assembly with anchor bolt and expansion wedge An attachment assembly formed of an anchor bolt (1) and an expansion wedge (2) with the anchor bolt having an outside surface (4) at its leading end in the setting direction and widening in a wedge-like manner. The expansion wedge (2) can be displaced axi... | 07/29/1997 |
| 5529424 | Dowel-type pin for connecting components, particularly furniture plates A dowel-type pin for connecting structural components, particularly for connecting furniture plates, is in a mounted position held over a portion of its length in a receiving opening of at least one of the plates to be connected. The pin is divided in lon... | 06/25/1996 |
| 5498108 | Anchoring device An anchoring device comprises an elongated element (1) introduceable into a hole (10) and means for securing the element against withdrawal from the hole. The securing means comprise at least one part (5, 13, 16) movably connected to the elongated element... | 03/12/1996 |
| 5468107 | Split nail Long and short legs have heads and pointed tips, respectively. They are joined together near their tips by welding. An upper portion above the welded portion of the long leg is formed with a cut extending obliquely upwards toward the short leg so that a t... | 11/21/1995 |
| 5273382 | Multi-purpose stake pocket tie-down anchor A tie down fitting adapted to fit within a stake hole in a side wall section of a pickup truck or other structure. The fitting includes a double wedge and heads dimensioned for insertion through the stake hole for engagement within the stake hole sides. A... | 12/28/1993 |
| 4892450 | Fastening element consisting of a tie bolt and a clamping wedge A fastening element comprises a tie bolt (1) and a clamping wedge (2) which for the purpose of transporting and insertion into a bore hole (24) are clamped together via a flange (5), which at the same time is used for attachment of a load (25) to a ceilin... | 01/09/1990 |
| 4886406 | Anchor bolt and expansion wedge An anchor member assembly is made up of an anchor bolt and an expansion wedge. The assembly can be anchored in a borehole in a receiving material by inserting the assembly and then displacing the expansion wedge relative to a wedge surface on the anchor b... | 12/12/1989 |
| 4859118 | Mine roof support anchor and process for installing the same A mine roof support anchor and process for installing the same. The anchor comprises a pair of wedge members, each of which has tapered surfaces adapted for interengagement to effect expansion of the shell into gripping engagement with the mine roof. The ... | 08/22/1989 |
| 4813832 | Fixing element keyable in a hole in a solid base A fixing element which can be keyed in a hole in a solid base has a tie bolt and a key which is movably mounted on a key surface slanting relative to the central longitudinal axis of the tie bolt. There is furthermore provided a power store which is suppo... | 03/21/1989 |
| 4797046 | Fastening unit with nail anchorage A fastening unit with nail anchorage, is provided including a cylindrical body with a head and a support leg. The body includes a surface parallel to its axis for guiding an anchorage nail. The leg includes an expansion surface, slanted in one direction w... | 01/10/1989 |
| 4706437 | Offset anchor The invention is an improved anchor for machine bolts and other similar fastening devices in masonry or other materials. The improved anchor consists primarily of a two-piece body structure. When in use the two-piece body structure is arranged for receivi... | 11/17/1987 |
| 4669935 | Expansion dowel assembly An expansion dowel assembly is made up of an axially elongated generally cylindrically shaped dowel body and at least one wedge-shaped expansion member formed monolithically with the dowel body. The dowel body has a first or leading end which is inserted ... | 06/02/1987 |
| 4604014 | Pallet fastener A two-part fastener made of resilient material is disclosed as comprising two identical mating fastening devices. Each fastening device is constructed with a circular disc head integrally formed with a shank. The shank has an elongate symmetrically-shaped... | 08/05/1986 |
| 4475856 | Expansion screw with an expansion sleeve having an outer cylindrical surface and regions of greater and lesser wall thickness An expansion screw for being secured in a cavity is threaded at the outer end of its screw portion for co-action with a nut (2) and is provided with an expandable sleeve (10) about its opposite end. The sleeve has an inner profile coacting with an outer p... | 10/09/1984 |
| 4464076 | Expansion dowel assembly An expansion dowel assembly is formed of an axially extending dowel body and an expansion member. The dowel body has a support surface inclined relative to the axis of the dowel body along which the expansion member can be displaced for anchoring the dowe... | 08/07/1984 |
| 4454701 | Anchoring of material to concrete A simplified anchor for firmly connecting wood or the like to concrete. The anchor includes a pair of connector elements. One element comprises a fluted concrete nail having the usual head and is made of hard metal. The other element comprises a headless ... | 06/19/1984 |
| 4454986 | Railroad spike An improved rail fastening assembly composed of a new rail spike and a contact plate member for maintaining a rail in the preset contact with a cross-tie. The assembly of the present invention maintains rail gauge in spite of long and heavy trains.... | 06/19/1984 |
| 4427327 | Anchor bolt including elongated spreader wedge An axially elongated fastening element is made up of an anchor bolt and a spreader wedge each having a wedge surface. Initially the two parts are inserted in the unspread condition into a borehole. By providing relative movement in the axial direction bet... | 01/24/1984 |
| 4415294 | Support means and system for supporting mine roofs Support means and system for supporting mine roofs, and particularly those areas of mine roofs between ribs of pillars in coal mines. Coal mine roofs frequently consist, at least in part, of shale in overlying strata, and are notoriously weak in tensile a... | 11/15/1983 |
| 4312615 | Fastening unit including an anchoring member and a spreader wedge A fastening unit for use in a prepared borehole includes an anchoring member and a spreader wedge. The anchoring member is formed from a single piece of metal plate and consists of an axially elongated shank part and a flange at one end of the shank part.... | 01/26/1982 |
| 4291608 | Expansion dowel An expansion dowel consists of an axially extending dowel body with a spreading member at its leading end and an expansion member extending around the dowel body rearwardly of the spreading member. A helically arranged control cam surface is formed on the... | 09/29/1981 |
| 4275637 | Fastening element assembly A fastening element assembly for insertion into a prepared borehole is made up of a tie bolt and an expanding wedge. The tie bolt has a C-shaped flange formed on its trailing end which projects radially and circumferentially from the tie bolt. The project... | 06/30/1981 |
