Abstract: An ice fishing device for aiding an ice fisherman in setting or holding a fishing line over a hole in the ice, and providing a visual signal when a fish is on the line. The device is characterized by means for releaseably holding a bobber over an aperture in the device, and release and disappearance or "pop-down" of the bobber when a fish is on the line. The device insulates the hole from the atmosphere and provides for solar heating of the hole area to prevent freeze-over of the hole. Jigging of the line is also provided for by the invention.

Abstract: A flexible track belt for removable, wraparound mounting on vehicle tires is comprised of a plurality of track sections which are linked together for pivotal movement with respect to each other about a single pivot pin connection to each track section. Each track section is comprised of a ground engaging crossbar extending between a pair of laterally spaced sidewalls which project generally upwardly when the crossbar is on the ground. Each of the connecting links for the track sections is rigidly attached to the sidewall of one track section and pivotally attached to the sidewall of an adjacent track section by a pivot pin extending generally parallel to the track crossbars.Tension in the track belt may be adjusted by at least one pair of adjustable coupling assemblies connected between at least one pair of adjacent track sections.