Abstract: A portable elevator climbing system removably attachable to a cantilevered overhang on an adjacent structure, whereby an elevator car travels up and down a plurality of roller chains. The roller chains are engaged with sprockets and guide rollers attached to an axle driven by a motor. The orientation and alignment of the sprockets, guide rollers and roller chains provide for a stable elevator car and for a system free of backlash in both directions. The elevator climbing system includes a dampening assembly to control the rate of decent in the event of transmission, motor or other failure. The elevator climbing system may be controlled so that the start and stop of the motor is coordinated with the release and application of a braking assembly. The efficiency of the elevator climbing system may be varied by adjusting the offset between the sprockets and the guide rollers.

Abstract: A portable elevator climbing system removably attachable to a cantilevered overhang on an adjacent structure, whereby an elevator car travels up and down a plurality of roller chains. The roller chains are engaged with sprockets and guide rollers attached to an axle driven by a motor. The orientation and alignment of the sprockets, guide rollers and roller chains provide for a stable elevator car and for a system free of backlash in both directions. The elevator climbing system includes a dampening assembly to control the rate of decent in the event of transmission, motor or other failure. The elevator climbing system may be controlled so that the start and stop of the motor is coordinated with the release and application of a braking assembly. The efficiency of the elevator climbing system may be varied by adjusting the offset between the sprockets and the guide rollers.

Abstract: A dampening device for use with elevator cars or similar devices prevents damage to objects or persons within the elevator car upon failure of a drive chain. A hydraulic motor regulates the rate of descent. The dampening motor is monitored constantly using a pressure gauge.

Abstract: A scale having a weight determining element having means to support the elements and means for engaging and suspending a load so that the weight of the load is measured, digital data storage within the weight determining element, a beam sensor in the weight determining element and a beam transmitter operable by a user to signal the weight determining element for temporarily recording a measured weight, a data storage device external of and separate from the weight determining element interconnectable with the weight determining element so that, upon command, the data stored in the weight determining element is transmitted to the data sotrage for use in a printer or for further data processing.

Abstract: An alarm and communication system for water skiers as provided for use with a boat having a driver and a ski rope secured at one end to the back of the boat and a handle at the other end of the rope to which the skier holds, the system including a battery powered radio receiver positioned on the boat, the receiver having an antenna and being arranged to receive a pre-selected radio signal frequency, an alarm switch connected to the radio receiver to provide a closed contact in the absence of the reception by the receiver of a signal of pre-selected frequency and wattage, an alarm connected to the switch, and a radio transmitter, antenna and power source of a size to be supported above the water as a skier holds to a ski rope handle and is supported on the water surface when pulled by the boat, the transmitter antenna being arranged to transmit at the pre-selected frequency of the receiver and of selected wattage sufficient that when the skier is ahold of the ski rope handle and supported above the water surfa