Compounds of the general formula I ##STR1## where the symbols n independently of one another are each 0, 1 or 2, m is 0 or 1, A.sup..crclbar. is an anion, the radicals X independently of one another are each hydrogen, methyl or ethyl and the radicals R independently of one another are each hydrogen, unsubstituted or substituted alkyl, cycloalkyl or aryl, or two adjacent radicals R may furthermore be alkylene or, together with the carbon atoms to which they are bonded, may form an unsaturated or ...

Fluorescent dyes which are free of aggregation and serum binding are provided. These dyes are suitable for applications such as fluorescence immunoassays, in vivo imaging and in vivo tumor therapy. The dyes are particularly useful in fluorescence immunoassays of biological samples containing serum. Such dyes have two polyoxyhydrocarbyl moities, one located on either side of a planar molecular structure such as a porphyrin derivative, azaporphyrin derivative, corrin derivative, sapphyrin derivati...

A conveyor apparatus for carrying workpieces on flat trays has two parallel chains with tray supports connected at equal intervals between the two chains. Each tray support has a clamping device for clamping and releasing flat silicone rubber covered trays against itself. Cams are located between the chains to operate the clamping device to release the tray (for travel through a separate path) at one point in travel and later (when the tray returns from its separate path) to clamp it again. The ...

A swing having a stationary support member to which is pivotally attached to first and second arms. The first and second arms are in turn pivotally attached by connectors on side wings that extend from a base member. The base member has an arcuate surface that extends from a first end to a second end with the side wings extending on a tangent from the second end for a fixed distance to a terminus point. The center of gravity of the attached base member is selected such that the base member is in...

An add-on hand-powered swinging mechanism for a porch swing or the like including an extension bar securable to a fixed surface adjacent the existing porch swing at one end thereof and having a pulley connection mechanism at a second end thereof; a pulley assembly, detachably mountable to an end of the extension bar, including an extension bar connecting mechanism and a pulley wheel rotatably mounted within a pulley bracket; a cable assembly including a handle member, a cable guide having a mech...

A swing apparatus, used primarily for the amusement of children, comprising a partially enclosed seating platform suspended by vertical hangers from an overhead support structure and a linkage mechanism which is used to initiate and sustain the swing pendular motion.

A swinger's position elevatory swing is disclosed. The swing lets manual and mechanical elevation of swinger's position by swinger's feet or hands at about the highest position of the swinger and thereby increasing the swinging times due to increased potential energy of the sitting board loaded with the swinger. A fixed sitting board is fixed to the swing ropes and has an arcuate hollow guide pipe and a fixing pipe. A movable sitting board is coupled to the fixed board and has an arcuate slide b...

Trace amounts of platinum, otherwise lost, are recovered from the alum solution resulting from the digestion of spent alumina-based platinum catalyst in sulfuric acid. The alum solution is commingled with a normally liquid trialkyl phosphate and a platinum-containing residue forms at the interface of said liquids as they are allowed to settle out into an upper and lower liquid phase.

An exercise apparatus includes a base member, an elongated and rectilinear central shaft with axially opposed top and bottom ends, first and second couplings attached to the top and bottom ends respectively, first and second handles coupled to the first coupling and extending outwardly away from the central shaft, first and second leg rails attached to the second coupling and extending laterally away from the central shaft, and a rectilinear auxiliary shaft with axially opposed top and bottom en...

A ropeboard apparatus includes a ropeboard, and a support rope for hanging the ropeboard from an elevated structure. The ropeboard comprises an elongated platform having a longitudinal platform axis and a top surface shaped for a user to stand thereon, and a coupler for rotatably coupling the platform to the support rope so that the platform can be rotated about its longitudinal axis. The ropeboard apparatus may also include a spunk or universal joint for attaching the support rope to the struct...