Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7125001 | Method and device for pulling a cable through a section of pipe An improved cable pulling device and method is shown. The cable pulling device is smaller, less expensive, and easy to use for lateral line replacement. The cable pulling device includes a cable contacting portion that provides supplemental frictional force during a... | 10/24/2006 |
| 5279020 | Rope clutch A rope clutch having a plurality of apertured pivoted plates which grip or release a rope passing through their apertures according to the angle they make to the rope, has a mechanism for initiating release of the rope which includes a variable toggle lin... | 01/18/1994 |
| 5083350 | Rope gripping device A gripping device for releasably gripping a rope-like member comprises a pair of rope-engaging members defining a pair of opposite, mutually spaced rope engaging surfaces defining a rope passageway therebetween. The rope engaging surfaces are mounted in a... | 01/28/1992 |
| 4814550 | Power line isolating apparatus and method A method and apparatus for isolating electric power lines includes an insulator assembly to which is pivotally connected two line clamps. After the clamps clamp to the wire, the wire is cut so that the insulator isolates the line. In one form the clamping... | 03/21/1989 |
| 4598442 | Clamping device for cables and rope A clamping device comprises a holder in which an actuation arm is movable in a longitudinal directions. A fixed clamping jaw is carried by the holder and a movable clamping jaw is arranged within the holder opposite to the fixed clamping jaw and it is sup... | 07/08/1986 |
| 4509605 | Wireline protector with improved clamping mechanism A wireline protector for protecting an electrical wireline used in a downhole drilling operation. During the operation of adding additional drill string members to the drill string, the electrical wireline is encased by and clamped within the wireline pro... | 04/09/1985 |
| 4450603 | Sail line stopper A sail line stopper is provided for controlling the rate of movement of a sailing line prior to or subsequent to the locking of a line in a fixed position. The sail sheet stopper has a base with a channel formed therethrough. A plurality of closely spaced... | 05/29/1984 |
| 4353528 | Restraining device A restraining device for controlling the movement of a loaded strop 3 comprises a power-driven reel for the strop and an associated pair of toggle-controlled clamping jaws 14, 15 pivoted at 16 and 17 respectively. The jaws are cross-connected by a link 18... | 10/12/1982 |
| 4334595 | Fall preventing devices An instantaneously acting fall preventing device comprises a casing containing a locking mechanism, in the form of a series of rings which are adapted to co-operate with a retaining cord, and a connecting element for attachment to a harness or safety belt... | 06/15/1982 |
| 4225012 | Safety clamp device and apparatus utilizing same An improved safety clamp device for use with movable platforms and the like includes a body member having a safety cable receiving cradle, a lever arm having a safety cable engaging portion, an elongate member carrying a pulley at either end, and a contro... | 09/30/1980 |
| 4181194 | Safety clamp device and apparatus utilizing same An improved safety clamp device for use with movable platforms and the like includes a body member having a safety cable receiving cradle, a lever arm having a safety cable engaging portion, the lever arm being pivotally connected to the body member and p... | 01/01/1980 |
| 4166427 | Tightening and securing cables holding barges together By grasping a steel cable with a low cost portable self-tightening clamp that increases its holding force as the tensile pull force increases, one man can tighten steel cables of various lengths having bitter ends by using temporarily a single portable ra... | 09/04/1979 |
