Abstract: A jewelry clasp includes respective first and second clasp parts and a slider. At least part of the first clasp part in an attached position thereof is received in a housing of the second clasp part. At least one of the first and second clasp parts includes a magnet, and the other of the first and second parts includes a part magnetically attractable by the magnet so that the first clasp part in its attached position is held to the second clasp part by magnetic attraction. The slider is attached to and slideable in relation to the housing of the second clasp part, and is slideable between a releasing state and a locking state. In the releasing state, the first clasp part may be detached from the second clasp part, and in the locking state the first clasp part is prevented from being detached from the second clasp part.

Abstract: A method for flexible automated comparison of a biller's data with the business customer's data via the EBPP system that is in place between the two. The biller stores a first set of customer billing data in its EBPP database. The customer stores a second set of customer billing data reflecting its most current information. The biller presents an electronic statement to the customer based on the first set of customer billing data. The customer selects one or more of the invoices for comparison and billing data fields to perform comparison on. The customer transmits an input file to the biller reflecting local data. The biller EBPP system then compares the customer's local billing data with the EBPP data. The step of comparing further includes selecting a comparison set of data from the EBPP data based on the one or more invoices selected by the customer. The comparison is performed on the fields indicated for comparison by the customer.

Abstract: An exposure system for experimental animals includes a container for a single animal which has a double wall. The animal is confined within the inner wall. Gaseous material enters a first end, flows over the entire animal, then back between the walls and out the first end. The system also includes an arrangement of valve-controlled manifolds for supplying gaseous material to, and exhausting it from, the containers.

Abstract: An exposure system for supplying a gaseous material, i.e. an aerosol, gas or a vapor, directly to the noses of experimental animals includes concentric vertical inner and outer manifolds. The outer manifold connects with the necks of a large number of bottles in which the animals are confined with their noses adjacent the bottle necks. Readily detachable small tubes communicate with the inner manifold and extend to the necks of the bottles. The upper end of the outer manifold and the lower end of the inner manifold are closed. Gaseous material is supplied to the upper end of the inner manifold, flows through the small tubes to points adjacent the noses of the individual animals, then is drawn out through the bottom of the outer manifold. The bottles are readily removable and the device can be disassembled, e.g., for cleaning, by removing the bottles, removing the small tubes, and lifting the inner manifold from the outer manifold.

Abstract: A knive having a tubular handle and provided with an open end for receiving a pair of blade clamping members in the form of leaf springs, one of the leaf springs being longer than the other leaf spring and having a projecting tab for insertion into a hole in the shank of a blade to be coupled to the handle. The inner end of the longer leaf spring is coupled to a slidable member having a knob projecting through and movable longitudinally of a slot in the handle. Movement of the slide member in one direction causes the projecting tab on the longer leaf spring to become exposed for coupling the blade shank to the leaf spring. Movement of the slide member in the opposite direction causes the longer leaf spring to be retracted fully into the handle so that the blade will be centered between the two leaf springs while projecting outwardly from the handle to expose the cutting edge of the blade.

Abstract: A low profile precision knife with a quick-change or safety storable blade. The blade holding handle being stamp formed from a minimum of two parts, namely a metal spring slide and a metal housing. The spring slide adapted to slidably fit the housing is provided with a flexible tang that is receivable to an aperture in the blade's shank. Securement of the blade is made by pulling on a projection on the spring slide at the knife handle's rear, thereby causing longitudinal bends and a tang, through the blade's aperture, to exert deformed pressure against the blade shank and an internal projecting nub in the housing when it is brought to its detent position against parallel shoulders on the blade. Removal of the blade is made by pushing forward with a finger on the slide projection at the rear of the knife. The blade can be safety stored by reversing the cutting edge into the housing when the spring slide is fully extended.