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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 8286946 | Modular lift assembly A modular lift assembly includes a frame, at least one head block connected to the frame, a drum rotatably connected to the frame about an axis of rotation and having at least one winding section, and a drive mechanism operatively connected to the drum for rotating ... | 10/16/2012 |
| 8047507 | Modular lift assembly A modular lift assembly includes a frame, at least one head block connected to the frame, a drum rotatably connected to the frame about an axis of rotation and having at least one winding section, and a drive mechanism operatively connected to the drum for rotating ... | 11/01/2011 |
| 7516944 | Swiveling and tilting roller axis for web guiding in a fiber placement machine A fiber placement machine includes a movable wrist with a fiber placement head at one end of the wrist. A roller system for delivering fibers to the fiber placement head includes a J-axis roller located spaced from the ends of the wrist, a K-axis roller at the end o... | 04/14/2009 |
| 7467782 | Fiber redirect system, multi-axis robotic wrist and fiber placement apparatus incorporating same and related methods A fiber redirect system for use with a multi-axis robotic wrist and fiber placement system and methods of using the same are provided. The fiber redirect system may include one or more redirect mechanisms configured to alter the path of one or more fiber tows fed fr... | 12/23/2008 |
| 7353853 | Fiber placement machine A fiber placement machine has a creel that supplies a fiber band to a presser member that applies the fiber band to a tool or form. The presser member is part of a head that is attached to the creel of the machine by a wrist that provides movement about yaw, pitch a... | 04/08/2008 |
| 7293762 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 11/13/2007 |
| 7258325 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 08/21/2007 |
| 7155858 | Trotline leader system A trotline leader system for fishing including a trotline, with a plurality of clips, hangers, drop lines, and fishing hooks, each clip including a head portion, a neck and a base and each hanger includes a head, a shank and an eyelet. The head portion is connected ... | 01/02/2007 |
| 6994324 | Fiber redirect system, multi-axis robotic wrist and fiber placement apparatus incorporating same and related methods A fiber redirect system for use with a multi-axis robotic wrist and fiber placement system and methods of using the same are provided. The fiber redirect system may include one or more redirect mechanisms configured to alter the path of one or more fiber tows fed fr... | 02/07/2006 |
| 6988716 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 01/24/2006 |
| 6691986 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or t... | 02/17/2004 |
| 6634622 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or t... | 10/21/2003 |
| 6619624 | Hoisting mechanism The invention relates to a hoisting mechanism comprising a rotatable reel and hoisting cables to be wound onto the reel, the hoisting cables running substantially parallel to one another, and a guide plate having feed-through apertures for the hoisting ca... | 09/16/2003 |
| 5855254 | Cable-clamping device for a synthetic fiber cable Cable-clamping device for a synthetic fiber cable. A cable-clamping device for highly loaded synthetic fiber cables for elevator installations, wherein the cables can tolerate only small lateral pressures, the device including at least one retaining drum ... | 01/05/1999 |
| 5456074 | Method for unwrapping subconductors A method of using an apparatus for unwrapping tangled, high voltage subconductors. The apparatus includes sheaves that hold each subconductor. Each subconductor is disposed in a gap between an upper and lower sheave. The invention can accommodate either t... | 10/10/1995 |
| 5269728 | Differential drive A differential hoist and drive includes a differential escapement mechanism arranged mechanically between and in combination with a pair of direction turning members, such as pulleys. An endless loop of a flexible force transmitting element (cable, chain,... | 12/14/1993 |
| 4585213 | Well derrick Well derrick in which the travelling crown block is operated by hydraulically operated linear actuators and a travelling block is operated by special reeving, the arrangement advantageously being such that the loads being handled bypass the tower of the d... | 04/29/1986 |
| 4341372 | Automatically meshing sheet winch The disclosed automatically meshing sheet winch has a drum to be driven either directly or indirectly through a reduction gear by a main shaft, and a rope guide which includes an internal gear operatively related to another internal gear formed on a fixed... | 07/27/1982 |
| 4213597 | Clothes line separator An elongate frame having a pulley at one end adapted to ride on the upper run of a clothes line, and a clamp mounted on the frame at the opposite end thereof operable to grip the lower run of the clothes line. The clamp is in the form of a bar swingably m... | 07/22/1980 |
