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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7966940 | Load-minimizing, trolley arrester apparatus and method A system comprising a cable held in suspension and a trolley traveling along the cable relies on a brake to control velocity and limit net downhill acceleration of the trolley. The trolley may include a brake pad positioned to contact the cable. At the downhill end ... | 06/28/2011 |
| 7966941 | Rider controlled zip line trolley brake An improved zip line trolley allowing a rider control of his or her speed while traversing along a suspended cable (8) as seen in FIGS. 1A and 1B. The trolley comprises front and rear pulleys (44F) and (44R) conjoined via pulley ho... | 06/28/2011 |
| 7404360 | Dynamically controllable, trolley brake A trolley for traveling along a cable. The trolley may include a frame having a first end, a second end, and a rail positioned between the first and second ends. A brake pad may connect to the frame. A sheave mount may also connect to the frame and include a sheave ... | 07/29/2008 |
| 7381137 | Zipline braking and motion-arrest system Braking and motion-arrest apparatus for braking the arrival of a zipline cable rider at a landing platform and arresting the rider's motion to retain the rider at the platform. A frame is mounted on the cable to allow longitudinal rolling movement of the frame along... | 06/03/2008 |
| 7351155 | Half pipe harness safety system The invention relates to a harness safety system that can be used while riding, for example, a skateboard, a bike, rollerblades, etc. through a half pipe. Specifically, the invention comprises a track spanning the half-pipe having a free-running cord and harness han... | 04/01/2008 |
| 7299752 | Trolley retrieval system A trolley retrieval system for transporting or returning trolleys from a finish area back to a start area for traveling along a cable. The systems may include a cable held in suspension between the first and second supports. A retrieval line may be suspended in a cl... | 11/27/2007 |
| 6971615 | Line support systems Embodiments of the invention may include a line support system that may have a support member with an elongate body that may form a loop. The support member may be configured such that a positive biasing force may be provided at a distal end of the line support. The... | 12/06/2005 |
| 6609859 | Ceramic cutting insert The invention relates to a ceramic cutting insert for cutting tools of the type which include a clamp with a nose intended to grip into a recess (5) in the cutting insert in order to keep the cutting insert firmly in place in an insert seat in a tool hold... | 08/26/2003 |
| 6550392 | Installation for the downhill transportation of passengers from a higher station to a lower station The installation enables the downhill transportation of passengers from a higher station to a lower station along a rail. Cars that are guided along the rail are equipped with the first of two interacting elements of an electromagnetic braking device, in ... | 04/22/2003 |
| 5660113 | Aerial cable support system for snow ski jumping A support system that allows skiers and snow boarders to descend from cliffs and other elevated surfaces while eliminating the high speed impact landing after the descent. Aerial cables (10 and 12), suspended between towers (14 and 16), provide a path for... | 08/26/1997 |
| 5224425 | Cable skydiving A diverse variety of high speed gravity cableway rides in which a rider on a pulley block car descends a mountainside and generally stops by frictional forces, due to the design of the cable arc, before hitting the lower cable support point. In some forms... | 07/06/1993 |
| 5042391 | Cable-guided messenger A cable-guided messenger comprises a solid, one-piece, integral member having a substantially cylindrical shape and an axis, the member having an axially extending throughgoing opening, a transverse slot extending transversely to the axis and communicatin... | 08/27/1991 |
| 4961385 | Automated transportation system An automated transportation system utilizes the force of gravity to propel vehicles along a system of cables. The cable may be manipulated through a hydraulic system to adjust their slope in a manner allowing vehicles to travel thereover in one direction ... | 10/09/1990 |
| 4934277 | Mobile aerial rapid rescue system A rescue device for use in traversing a cable of an aerial transportation system, the rescue device including a frame carried by a pair of wheels for movement along the cable, the frame including a portion extending below the cable, and a lever arm having... | 06/19/1990 |
| 4905606 | Safety attachment systems, and parts and fitting therefor A linkage mechanism for a safety attachment system in which a pair of traversing devices are engaged with an elongate safety line for sliding movement therealong past intermediate securing devices for the safety line. The traversing devices are coupled to... | 03/06/1990 |
| 4503942 | Device for guiding a submersible pump unit A device for guiding a submersible pump unit to and from its operation position includes an essentially vertical thin guide member the lower end of which gradually changes into a broader portion and the upper end of which is tilted to make possible an eas... | 03/12/1985 |
| 4359946 | Elevated downhill transport system An elevated downhill transport system is provided with a cable system and appropriate towers to support the cable along a variable downhill course. A single cable only, being necessary, a cable trolley is also provided that prevents the carriage from acci... | 11/23/1982 |
| 4164289 | Logging carriage A logging carriage is mounted by hinged sheaves for travel along an elevated cable for the conveyance of felled logs to a log unloading site. The carriage is moved in one direction along the elevated cable by an in haul line which is attached at one end t... | 08/14/1979 |
| 4159113 | Child recreation structure A steel cable is stretched overhead between a starting platform and a terminal tower and equipped with a passenger pulley having a handle from which a child can hang while rolling along the cable. Only difficultly negotiable ladder means e.g., a chain or ... | 06/26/1979 |
| 4062293 | Trolley ride apparatus A trolley ride for sliding along a wire stretched between two uprights having a pair of identically molded plastic side members adapted to be bolted together with a pair of horizontally aligned pulleys rotatably mounted therebetween. Each side members hav... | 12/13/1977 |
