1
James S Sweeney Jr: Programmed exerciser apparatus and method. Lifecycle, Thomas J Plante, November 9, 1982: US04358105 (166 worldwide citation)

An exerciser is disclosed, of the type providing automatically controlled variations of effort levels, wherein "random" variations of effort level are included which are not predictable by the operator. The effort levels [steps] are provided in a sequence of four: the second [step] level is random; ...


2
James S Sweeney Sr, James S Sweeney Jr: Physical exercise apparatus having motivational display. Thomas J Plante, June 27, 1989: US04842266 (100 worldwide citation)

A running/walking machine, or treadmill, is disclosed which has an automatically controlled speed-varying electric motor and an automatically controlled elevation-varying electric motor. The commands are entered in a display panel having a microprocessor which communicates with the motor controlling ...


3
James S Sweeney Jr: Racing system for exercise machines. Laguna Tectrix, Thomas J Plante, February 18, 1992: US05089960 (100 worldwide citation)

A racing system for a group of exercise machines is disclosed. The race is entirely flexible, in that each exercise unit communicates electronically with all of the other potential racing units. Any user may offer a race, accept or reject another user's race offer, or join a race during a limited co ...


4
Michael T Sweeney, Duane P Stark, James S Sweeney Jr: Exercise apparatus and method which simulate stair climbing. Laguna Tectrix, Thomas J Plante, July 3, 1990: US04938474 (97 worldwide citation)

An exercise apparatus is disclosed which simulates a stair climber, and which determines the amount of user exercise by the speed of rotation of a flywheel. The speed of the flywheel is controlled to maintain the desired speed of stair climbing by a friction belt engaging the flywheel. A rotary elec ...


5
James W Pittaway, James S Sweeney Jr: Motor-driven exercise apparatus having runaway prevention system. Thomas J Plante, June 7, 1988: US04749181 (50 worldwide citation)

A motor-driven exercise apparatus is disclosed, which incorporates a plurality of runaway-preventing features, thus reducing the chance of injury to the user. A motor control circuit is effectively controlled by pulse width modulated commands from a CPU, and by frequency-variable feedback informatio ...


6
James S Sweeney, James S Sweeney Jr: Digital motor control for positioning system. Thomas J Plante, January 19, 1982: US04312033 (31 worldwide citation)

A digital motor control positioning system, and method, are disclosed in which lead screw position is measured by an encoder, and the error between that position and the destination is measured, either continuously or repetitively, to provide digital, distance-representing control pulses to the moto ...


7
James S Sweeney Jr: Adaptive pulsing motor control for positioning system. Unisen, Thomas J Plante, October 5, 1982: US04353019 (28 worldwide citation)

A motor control positioning apparatus and method are disclosed wherein variable duration pulses are fed to a DC motor. After the vicinity of the destination has been reached, the final pulsing stage is initiated, in which a short duration pulse is fed to the motor; position is then checked to determ ...


8
Duane P Stark, Michael T Sweeney, James S Sweeney Jr: Stationary exercise device having load-controlling braking system. Tectrix Fitness Equipment, Thomas J Plante, July 1, 1997: US05643146 (23 worldwide citation)

A stationary exercise cycle is disclosed having a drive wheel which receives both user driving force and automatically controlled friction brake resistance, i.e., it is a single-stage device. Free-wheeling is provided between a user-driven shaft and the periphery of the drive wheel, which is braked ...


9
James S Sweeney Jr: Adaptive pulsing motor control for positioning system. Unisen, Thomas J Plante, February 18, 1986: US04571530 (10 worldwide citation)

An adaptive motor pulsing apparatus for a driven element positioning system is disclosed which divides the available time between recurring motor on periods and motor off periods, and which also varies the duty cycle of the motor during successive on periods in order to provide precise positioning c ...


10
James S Sweeney Jr: Adaptive pulsing motor control for positioning system. Unisen, Thomas J Plante, March 7, 1989: US04810946 (5 worldwide citation)

A machine positioning apparatus and method are disclosed in which motor control values are established by causing intentional overshoot of the destination, and automatically reducing the motor control values each time an overshoot occurs. The system disclosed is a three stage system in which: (1) th ...