Abstract: A method and apparatus wherein an aquatic device tethered by a single line provides an accentuated zigzag or oscillating movement when the device has a relative speed with respect to water. The device may be either buoyant or submergible. The device has a frame, a pair of pintles, a tow or retrieval structure for connection to a line, and a bi-stable guidance vane which snaps from port to starboard to port and so on to cause the device to produce a zigzag pattern from right to left to right and so on, without electrical control or power. Alternative embodiments are illustrated which incorporate a forward mouth-like structure which directs water alternatively across one major surface of the device and then the other, without requiring the pintles of the first embodiment.

Abstract: A method and apparatus wherein an aquatic device tethered by a single line provides an accentuated zigzag or oscillating movement when the device has a relative speed with respect to water, the device may be either buoyant or submergible. The device has a frame, a pair of pintles, a tow or retrieval structure for connection to a line, and a bi-stable guidance vane which snaps from portside to starboard to portside and so on to cause the device to produce a zigzag pattern from right to left to right and so on, without electrical control or power.

Abstract: A method and apparatus for indicating force, weight in particular, is done mechanically. The method has the steps of engaging the force with a base plate, bending the plate with force, rotating an indicator plate with respect to the base plate and about an obtuse axis hinge movably adjoining the plate, and measuring the rotation and converting it to an expression of force. The Apparatus has a base plate, an indicator plate, a hinge movably adjoining the two plates, an obtuse hinge axis, and structure to measure and interpret rotation of the indicator plate about the obtuse hinge axis as the base plate is bent by a force such as weight. A specific embodiment of the weight scale is provided for a fishing rod, for a fish scale, and for a pail scale.

Abstract: A compression string bow comprises a bow having a center portion including a forward handle grip, and limbs at the outer end of said center portion. The limbs have a string strung between the outer ends thereof. The center portion includes a compression carrying leg member between the outer ends of the handle, so that upon drawing the string, the compression carrying leg member is forced into compression to load the string in tension, and to give an action of a compound bow, that is, the draw force does not increase substantially as the bow approaches its full draw length.