Abstract: A method for installing a liner in a swimming pool including a wall having a liner edge retainer extending along the upper periphery. With the pool containing water, an edge of a liner is attached to the retainer at a first position on the wall and a pulling device is attached to the liner edge at a position opposite the retainer attachment. The pulling device is manipulated to drag the liner along the pool bottom and up the wall to a position opposite the first position where the edge is then attached to the retainer. A substantial portion of the pool water is scooped up in the liner and the remaining water can be pumped from between the wall and liner. The method can be used to install a second liner over an existing first liner by using different liner edge retainers. More than one embodiment of the pulling device is disclosed.

Abstract: A cover for a pool is retained in position by a plurality of water-filled enclosures, each including a container and a lid formed of a substantially rigid, plastic material having a specific gravity of less than one. The elongated, watertight container has a continuous flange about its upper, open end with openings at spaced intervals to receive locking pins integral with the lid. The lid has a pyramidal-shape to prevent water and debris from collecting thereon. The lid outer perimeter has lip engaging the marginal edge of the container flange to retain its shape without bowing due to the expansion of freezing water. The containers and lids are nestable and stackable when not in use. The container flange openings extend downwardly along an tipper portion of the side walls to prevents overfilling. The lid may be hingedly connected to the container, while retaining the nestable, stackable capability.

Abstract: A rotary marking tool in which a marking wheel having raised characters for marking a workpiece is rotatably connected to one face of a block, is disclosed. Cooperating with the marking wheel is a pawl pivotally connected likewise to the block adjacent to the marking wheel. A tension spring is anchored at its opposite ends to a portion of the pawl and to a stop-pin affixed to the marking wheel, the spring acting to urge a beak of the pawl against the periphery of the marking wheel, whereby the stop-pin on the marking wheel is urged into contact with an abutment on the block to, thereby, define an at-rest position of the marking wheel. Upon rotation of the marking wheel in a direction away from its at-rest position, the beak of the pawl is adapted to penetrate a notch formed in the periphery of the marking wheel remote from the stop-pin. Once the beak penetrates the notch, the wheel is prevented from continuing its rotation away from its at-rest position.

Abstract: A die holder comprising a housing in which is freely journaled a spindle, the spindle terminating in a free end portion capable of supporting a die. A collar is mounted upon the spindle and is associated with a position-referencing system which governs an at-rest position of the spindle relative to the housing. At least one shearable pin or lug fixedly secures the collar to the spindle, the lug having a shear-resistance below the bending and shear-resistance of the spindle, the collar and the housing so as to be capable of shearing in the presence of the application of an excessive torque to the spindle before any damage occurs to the remainder of the die holder. The die holder also includes a releasable spring-clutch device interposed between the spindle and housing for overcoming any rotary force exerted against the spindle tending to rotate the latter to its at-rest position before the die held by the die holder is fully released from a workpiece.