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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7533868 | Drive unit, without engine frame, for an elevator A drive unit has at least one motor, a motor stand, a bearing block, a drive pulley and a counter-roller attachment. The drive pulley is mounted at the motor stand and at the bearing block by a shaft. A respective brake is arranged at the bearing block at each side.... | 05/19/2009 |
| 7150449 | Overhead storage system An overhead storage system for efficiently and conveniently stowing items such as bicycles at ceiling level. The overhead storage system includes a motor connected to a spool unit, a frame supporting the motor and attachable to a ceiling, an extended member extendin... | 12/19/2006 |
| 6957804 | Blade installation tool An apparatus for lifting and aligning a blade to a support, such as a grader moldboard or a scraper bowl. In one aspect the invention is an apparatus with a frame, flexible hoisting means for holding the blade, a drum to which each flexible hoisting means is attache... | 10/25/2005 |
| 6729605 | Cable winch hoisting device for stages A cable winch hoisting device for theatrical stages, whereby a plurality of elongated, rod-like holding girders are suspended on cables, and these holding girders are adjustable in height by varying the free cable length between the cable suspension and the holding ... | 05/04/2004 |
| 6682054 | Acceleration system An acceleration system (30) for accelerating a load, for example for launching an aircraft (21), comprises a flywheel (12) driven from a power source (15), the flywheel (22) having a spiral profiled surface (16) for receiving a cable (17) a remote end por... | 01/27/2004 |
| 6558083 | Dock installation and removal apparatus and method An apparatus and method are provided for installing successive segments of a segmented dock. A suspension structure is connected to a previously installed segment of dock. The suspension structure includes a frame rotator for rotating a dock frame from an... | 05/06/2003 |
| 5678805 | Method and apparatus for retrieving lost golf balls including golf ball picker and power drive device for moving the picker A method and apparatus for retrieving golf balls from a submerged surface includes a power drive device which is stationed along the shore of the submerged surface of a golf course water hazard and which carries a pair of spools on which flexible line is ... | 10/21/1997 |
| 5149057 | Tape drive with self-expanding coils for sludge collector Apparatus for taking up and paying out first and second ends of an endless loop of tape that has an intermediate section. A first reel connected to the first end carries a first coil of the tape. The first coil extends from the first reel and is normally ... | 09/22/1992 |
| 5106057 | Stage set lift apparatus An apparatus for the motorized control of theatrical sets connected to manual lift units each comprising upper and lower pulleys upon which a line runs to raise and lower a counterweight operatively connected to a set on the stage by a plurality of lift l... | 04/21/1992 |
| 4715583 | Tension fixture for a curtain A tensioning device for use with an endless traverse which is longitudinally adjustable in both directions responsive to a rotational drive. The rotational drive includes two driving gears which are each selectively coupled with a drive shaft so that when... | 12/29/1987 |
| 4662586 | Apparatus for moving aircraft An apparatus for moving aircraft on flat surfaces with the aid of cables which, on the one hand, act on the aircraft and, on the other hand, pass to winch drums via guide pulleys which are in part displaceable is characterized in that, for moving aircraft... | 05/05/1987 |
| 4650162 | Winch having a compact housing A winch is disclosed and is equipped with two drive shafts and two rope drums corresponding thereto. The rope drums have peripheral grooves in which the rope which is slung over the drums is guided. A slip clutch is provided to compensate for velocity dif... | 03/17/1987 |
| 4632363 | Winch having a drive disc connectable to a rope drum in dependence upon the load applied to the rope A winch is disclosed having at least one rope drum which includes a run-out groove on its periphery in which a rope is guided. The run-out groove is bounded in part by a tightening disc which is pressable against one side of the rope. The run-out groove f... | 12/30/1986 |
| 4613849 | Interference warning device An interference warning device for an oil well drilling rig having a derrick, traveling equipment, a racker arm, and a block retractor. Fluid activated sensors provide electric signals when the traveling equipment is within a selected vertical distance fr... | 09/23/1986 |
| 4411299 | Log splitter An apparatus for splitting logs and the like is disclosed. The apparatus comprises an elongated track having an upstanding splitting wedge attached thereto and a ram slidingly mounted thereon. The ram includes an upstanding abutment plate and an upstandin... | 10/25/1983 |
| 4348960 | Aerial cableway between a sea vessel and a fixed installation An aerial cableway for transferring personnel/goods between a vessel and a fixed installation at sea, consisting of a support cable stretched between the vessel and the fixed installation. A winch provided with a slippage device maintains constant tension... | 09/14/1982 |
| 4057219 | Counterpoising load support apparatus and method In a device for counterpoising a range of cable supported loads, the inner end of a torsion spring is fastened to a shaft. A cam having an axially extending spiral cable groove of continuously varying radius is journaled on the shaft and the outer end of ... | 11/08/1977 |
| 4005852 | Traction sheave warning for helicopter rescue hoist systems A helicopter rescue hoist-traction sheave assembly including a hoist cable engaging sheave and first housing, a drive motor having a drive shaft mounting the sheave and a second housing mounting the motor and positioned in adjustable relation to the sheav... | 02/01/1977 |
| 4003552 | Counterpoising load support apparatus and method In a device for counterpoising a range of cable supported loads, the inner end of a torsion spring is fastened to a shaft. A cam having an axially extending spiral cable groove of continuously varying radius is journaled on the shaft and the outer end of ... | 01/18/1977 |
