Abstract: Families of Diels Alder adducts and of metal complexes of Diels Alder adducts, which are useful as particularly active compounds for use in photodynamic therapy, are disclosed. The Diels Alder adducts and a preferred family of metal complexes have the structures of Formula 1, Formula 2, Formula 3 and Formula 4, below: ##STR1## where R1, R2, R3 and R4 can be the same or different, and each is methyl or ethyl, R5, R6 and R7 are ethyl, R8 is an alkyl group other than t-butyl having from one to four carbon atoms and M comprises a metal cation, e.g., Sn or Zn, that is complexed with two of the nitrogens of the adduct. The use of the adducts and complexes in photodynamic therapy is also disclosed.

Abstract: Apparatus for treating potable water to remove odorous sulfur compounds therefrom is disclosed. The apparatus comprises a treating tank, a fogging nozzle, means for directing water to be treated through the fogging nozzle and into the treating tank, means for injecting compressed air into the water directed through the fogging nozzle, a filter vessel, and a de-aerating vessel. The compressed air injected into the water that is directed through the fogging nozzle is at a pressure sufficiently high that minus 100 micron water droplets leave the fogging nozzle. Air, most of the sulfur compounds present in the water and some entrained water are ultimately discharged from the treating tank. The means for directing the water to be treated through the fogging nozzle is controlled to maintain a predetermined water level in the treating tank. The filter vessel contains a bed of a filter medium which forms a loose bond with the remaining H.sub.2 S in the filter vessel.

Abstract: An archery bow with an offset handle is disclosed. The handle is hingedly connected to the riser of the bow so that the handle is free to pivot relative to the riser and vice versa. This connection prevents torque from being transmitted from the handle to the riser and offers improved accuracy. The connection between the riser and the handle allows rotation about an axis which coincides with the center plane of the bow. There is a substantial offset between the handle and the center plane of the bow. The offset provides substantial arm clearance and permits construction of the bow to accommodate remarkably short brace heights. Preferably, an arm brace is attached to the handle. An improved bow having such offset handle as well as reduced brace height and increased power stroke and increased standard rated velocity is also disclosed. A riser modification is taught wherein the limb angle is maintained to achieve the increases in power stroke and standard rated velocity.

Abstract: A treeshelter system comprising a unitary treeshelter with integral staking means is disclosed. The treeshelter system may include treeshelter extenders with a lower edge having connector means which cooperate and connect with connector means provided on the upper edge of a unitary treeshelter or on the top edge of another treeshelter extender. The unitary treeshelter comprises a hollow tube, preferably in the form of a truncated cone, open at both ends, and formed of polymeric material. The tube comprises integral staking means consisting of a plurality of rods secured to and supported in a like number of bosses formed integrally with the tube, and spaced substantially evenly around the lower edge of the tube. A unitary treeshelter according to the invention is installed in a single step by positioning it over a seedling and pressing downwardly until the lower end of it is flush with the ground and the rods are securely embedded in the ground.

Abstract: An animal trap is disclosed. The trap comprises a tubular housing which can be too small to accommodate movement of an adult hand inside. A trap door is mounted at one end of the housing for movement between a first position, set or open position and a second, closed position. The other end of the housing is closed. The trap further comprises a door latch, a bait stick and a bait stick holder. The trap is set by positioning the door latch so that it keeps the door in the first position until the bait stick is disturbed, whereupon the door latch is released and the door moves to the second, closed position. The bait stick is supported in a bait stick holder which, in turn, is positioned in an aperture in the housing and engages a portion of the housing wall. The trap is constructed so that the bait stick and the bait stick holder can be removed from the housing for baiting the bait stick outside the housing.

Abstract: A substantially binder-free glass fiber separator, especially for valve regulated ("sealed") lead acid batteries is disclosed. The separator has a reduced thickness and temporarily inhibited resiliency. A substantially binder-free glass fiber web having a given thickness is wetted with a controlled amount of liquid and compressed to a substantially reduced thickness and the liquid suppresses the natural resiliency of the glass fiber separator so that it will have a substantially reduced thickness when the compression is released. The amount of liquid required to suppress the resiliency of the glass fiber separator is substantially less than the minimum amount of the portion of electrolyte which would be carried in the separator in a finished cell.

Abstract: A split clevis which is especially suited for suspending heat transfer chain from hangers in rotary kilns is disclosed. The clevis comprises first and second arms and an opening is provided at one end of each arm for receiving an end link of a chain. In a chain assembly including the clevis, the end link connects the rest of the links in the chain to the first and second arms. A support shaft is provided on the first arm. The support shaft has a first portion, adjacent to the second end of the first arm to which it is attached. The first portion of the support shaft is received in the hanger aperture. A second, end portion of the support shaft has a reduced diameter and there is a shoulder between the first and second portions of the support shaft. An aperture is provided in the second arm for receiving the second, end portion of the support shaft.

Abstract: A method for producing a sintered reaction bonded silicon nitride insulator is disclosed. The method comprises mixing powdered silicon having an average particle size not greater than 5 .mu.m with from 3 to 7 percent each of MgO and CeO.sub.2, pressing a shape from the resulting mixture, calcining the shape, grinding the calcined shape to a desired contour, and heating the ground shape in a nitrogen atmosphere at a pressure of about 1 atmosphere absolute. The MgO and CeO.sub.2 serve as sintering aids. Other suitable sintering aids include 2 to 8 percent of Y.sub.2 O.sub.3, 6 percent of Y.sub.2 O.sub.3 and 2 percent of Al.sub.2 O.sub.3, and 2 to 8 percent of MgO, BeO, HfO.sub.2 or Zr.sub.2 O.sub.2. The heating of the ground shape is controlled, until a reaction bonded Si.sub.3 N.sub.4 body is produced in which at least 99 percent of the Si in the initial charge is reacted to Si.sub.3 N.sub.

Abstract: A portable communication device for providing a written record of communication is disclosed. The device comprises a case and a pad of carbonless, multiple sheet sets of message paper. The case comprises a rear panel having a major dimension and a minor dimension substantially perpendicular to the major dimension, a strike through shield connected to and depending from the rear panel, means for supporting a pad on said rear panel and, optionally, a cover including storage means for retaining sheets. The pad has a major dimension and a minor dimension corresponding with those of the rear panel, and the sheets include line means defining a writing area and extending generally in the direction of the minor dimension. The minor dimension is such that the device can be held in one's hand, between the heel and fingers, so that one's other hand can be used to write in the device. The major dimension should be at least as great as the minor dimension and preferably, it is approximately six inches.

Abstract: A method for producing a ceramic is disclosed. The method involves comminuting a batch composed of from 6 to 95 percent of particulate ZrO.sub.2 and from 5 to 94 percent of particulate Al.sub.2 O.sub.3. A part of the particulate ZrO.sub.2 is in a metastable tetragonal crystal structure, for example, as a consequence of 3.sup.m/o of Y.sub.2 O.sub.3 dissolved therein and a part has a monoclinic crystal structure. The comminuted batch is compacted into a shape, and the shape is fired. The degree of comminution of the batch, the firing conditions and the proportions of stabilized and monoclinic ZrO.sub.2 in the batch are controlled to produce a dense, gas impervious ceramic which contains both metastable tatragonal and monoclinic ZrO.sub.2, and in such proportions that the ceramic has improved strength by comparison with an otherwise identical ceramic wherein all of the ZrO.sub.2 is in either a metastable tetragonal or a monoclinic crystal structure.

Abstract: Air conditioning apparatus is disclosed. The apparatus includes a plurality of air outlets, refrigeration apparatus operable to make ice by pumping heat from water to a heat sink and to store the ice, a coil for dehumidifying outside air or a mixture of outside air and return air, means for causing air to be dehumidified to flow in heat transfer relationship with the coil, means for circulating dehumidified air to the air outlets, means operable to control the moisture content and temperature of the dehumidified air, means operable to control the rates at which dehumidified air is delivered by the air outlets to the spaces they serve to ones not less than the predetermined minimum rate, and means for controlling the temperature of the air delivered to the air outlets to maintain the temperature of the spaces within control limits. Each of the air outlets is operable to deliver air to a space to be conditioned.

Abstract: A ceramic article is disclosed. The article is composed of from 6 to 50 percent of particulate ZrO.sub.2 having an ultimate particle size less than 2 .mu.m, from 50 to 94 percent of particulate Al.sub.2 O.sub.3, from 1/4 to 3 percent of MnO.sub.2 and from 1/4 to 3 percent of TiO.sub.2.

Abstract: Air conditioning apparatus for a building having an electrical grid operatively connected to receive electricity from a utility is disclosed. The apparatus includes compression refrigeration apparatus with an electric motor connected to drive a compressor, absorption refrigeration apparatus, a cogenerator, an air handler, induction mixing units, a system for circulating air to be conditioned through the air handler and then to said induction mixing units, apparatus for transferring heat from air in the air handler to ice, a heat transfer system connecting the absorption refrigeration apparatus to pump heat to a heat sink from air in the induction mixing units or from air in the air handler, electric circuitry connecting the electric motor of the compression refrigeration apparatus to the building electrical grid for energization, and a heat transfer system for transferring heat generated by the cogenerator into energizing relationship with the absorption refrigeration apparatus.

Abstract: An improved mixing box is disclosed. The mixing box comprises an inlet end, an outlet end, a substantially closed first passage to which primary air flows from a primary air inlet and then through induction means and to and from the outlet end. The induction means are positioned intermediate the inlet and outlet ends and are operable, when primary air flows through the passage, to induce a flow of air through a first opening for mixture with primary air and delivery therewith through the outlet end. The mixing box also comprises means for controlling the rate of flow of primary air and a fan operable to induce a flow of air through a second opening and to deliver such air through the outlet end of the box.

Abstract: A dispensing container is disclosed. The container can be formed from a unitary prescored blank. The container comprises first and second main panels, four major side walls and at least one minor side wall which extends between to adjacent major side walls and cuts the corner that would otherwise be formed by the two major side walls. The minor side wall is constituted by a first, inner minor side wall panel connected to the first main panel and disconnected from the second main panel and a first, outer minor side wall panel connected to the second main panel and disconnected from the first main panel. A content dispensing device is associated with the minor wall so that it does not extend beyond the corner which would otherwise be formed by the two adjacent major side walls. The container can be shipped with the dispensing element in place. In applications involving liquid products, a liquid impervious liner is provided on the inside of the container.

Abstract: In a device for metering at least two fluid reaction components into a mixing chamber, flexible displacement elements (1, 2; 47, 48, 49, 50) are provided in each container chamber (43, 44, 45, 46) which divide each container chamber (43, 44, 45, 46) into a component chamber (12, 13; 51, 52, 53, 54;) and a hydraulic chamber (16, 17; 55, 56, 57, 58), whereby the flexible displacement element (1, 2; 47, 48, 49, 50) for each component is acted on by a hydraulic flow which can be pre-specified and also regulated during the metering procedure in its magnitude and duration by a control-regulation device (3 or 4).

Abstract: A semi-conducting ceramic is disclosed. The ceramic consists essentially of from 50 percent to 72 percent of silicon carbide particles, from 25 percent to 47 percent of silicon nitride particles and a modified silicon oxynitride glass bonded to the silicon carbide particles and bonding the silicon nitride particles together.An improvement in a method for producing an article which comprises silicon carbide particles dispersed in a matrix is also disclosed. The method includes the step of firing or sintering the article to convert the matrix to a densified ceramic with the formation of a liquid phase. The improvement involves embedding the article, prior to firing, in a cover material which contains powdered silicon and maintaining a nitrogen or an inert atmosphere in contact with the cover material during firing. The amount of silicon in the cover material and the composition of the atmosphere are such that the silicon carbide particles are protected against oxidation.

Abstract: Several embodiments of apparatus for producing disposable absorbent personal articles are disclosed. According to one embodiment, apparatus is disclosed for depositing superabsorbent polymer powder on a portion of a fluff mat in a given concentration greater than zero and a second, different concentration of superabsorbent polymer powder on another portion of a fluff layer, so that there is a heavier concentration of super absorbent polymer in a target area than in areas adjacent the target area. Such apparatus has a dosing cylinder with a discontinuous outer cylindrical surface which has a pattern of first dosing depressions adjacent to a pattern of second dosing depressions. The dosing cylinder is rotated through a polymer powder hopper and powder received in the first and second depressions is sequentially discharged from the hopper and deposited on a fluff substrate in alternating areas of high powder concentration and low powder concentration.

Abstract: A delivery system for controlling the flow of fluid is disclosed. The comprises a control valve comprising an electric control motor and a valve, and a hydraulic piston type motor including a shaft which is rotated when fluid flows through the system. The rate at which fluid flows into the system is measured by the hydraulic motor and is reflected by the rate at which the hydraulic motor shaft rotates. The rate at which fluid flows through the system is controlled by the control valve. The control valve is movable between a first position in which a first fluid flow rate through the system is achieved and a second position is which a second flow rate higher than the first rate is achieved. The control motor is responsive to an external signal which indicates a rate rotation for the control motor corresponding with a rate of fluid flow.

Abstract: A portable container device, particularly adapted for use by spectators in bleachers seats, is disclosed. The device comprises a container having a bottom, a top and four sides and a support bracket secured to the top of the container. The support bracket comprises upper and lower flanges adapted to be positioned above and below a bleacher seat. A depth flange is connected to and between the upper and lower flanges and serves to maintain them in substantially parallel relationship. The depth flange is located above the front wall, on the front side of the device. A pivotable support handle may be provided adjacent to the rear side of the device so that it can be pivoted between a rest position and a support position. In the support position, the handle supports the upper flange to maintain it in substantially parallel relationship to the lower flange, even for example, when a person is seated upon the upper flange. A cushioned seat may be provided on the top of the upper flange for comfort.