초록 ▼

A tool-loadable biasing spring for a knob retainer plate securing a doorknob on its knob sleeve. The plate is slidable transversely in the sleeve and has a central opening. The biasing spring has a bight with a hook for engagement behind the linear forward border of the opening and with an axial off

A tool-loadable biasing spring for a knob retainer plate securing a doorknob on its knob sleeve. The plate is slidable transversely in the sleeve and has a central opening. The biasing spring has a bight with a hook for engagement behind the linear forward border of the opening and with an axial offset for transmitting thrust to such border. Spring legs extend unrestrained across the face of the plate into camming relation with forwardly diverging inner faces of the sleeve, so as to generate forward bias on the spring. The legs have axial offsets with out-turned fingers to lock behind the plate. For loading, the spring is held in resiliently contracted condition across the end of a holder tool, and the tool is inserted into the end of the sleeve until both the bight offset and leg offsets and fingers pass simultaneously through the retainer plate opening. The spring is then released for self-movement into interlocked relation with the plate.

대표청구항 ▼

Spring-biased mechanism for securing a knob or the like with respect to a knob sleeve adapted to be assembled by translatory movement of a biasing spring, comprising a tubular member, a plate mounted for movement transversely of the tubular member and adapted to be biased in a forward direction of s

Spring-biased mechanism for securing a knob or the like with respect to a knob sleeve adapted to be assembled by translatory movement of a biasing spring, comprising a tubular member, a plate mounted for movement transversely of the tubular member and adapted to be biased in a forward direction of such movement, said plate having border portions adjacent an opening in the plate, exposed axially within the tubular member, and including a forward thrust-receiving border, a generally U-shaped spring having a bight engaged in thrust-transmitting relation with said forward border and side legs extending unrestrained chordally across the tubular member and having cam nose portions engaged in camming relation with forwardly diverging inner surfaces at the opposite side of the tubular member, the legs when in operative position being stressed to exert camming force laterally against such diverging surfaces and thereby to produce forward biasing force at the bight of the spring, wherein the improvement comprises the following additional features and relationships: said plate border portions including side and rearward borders, said spring being resiliently bendable to a loading condition wherein it is movable by translatory movement normal to its plane into assembly relation with the plate, said spring bight including an offset and the plate and spring being so shaped that by translatory movement of the spring in loading condition such bight offset will pass through the plate opening to a position extending through the plane of the plate and from which it is then movable into interlocked relation with the plate by forward movement of the spring parallel to the plate, said spring legs having inward reverse bends forming said cam nose portions for engagement with said diverging surfaces, having leg offsets inward of such bends to extend through the plane of the plate, and having retaining fingers bent outward from said leg offsets to engage behind the plate, the plate and spring being so shaped that, with the spring in loading condition, the same translatory movement which passes the bight offset through the plate opening will carry the leg offsets and outward bent retaining fingers of the spring through the plane of the plate to assembly relation with the plate, where they will be movable into interlocked relation with side borders of the plate, the spring, on release from its loading condition, being operative to move its legs outward from each other to carry said cam nose portions into camming engagement with said diverging surfaces of the tubular member and thereby to cam the spring forward in its plane so as to carry the bight offset into thrust-transmitting relation with the plate and interlock the retaining fingers with side borders of the plate.