Abstract: Methods are provided for the controlled simultaneous dispensing of several fine powders into microcontainers which containers are used subsequently for clinical determinations. The method includes sifting the fine powders individually to render the individual particles of each powder to be the same size, and then combining them for the subsequent dispensing procedures. The method contemplates, in addition, the reduction of the individual particles of some powders to provide the equal size requirements, before combining with one or more other powders for the subsequent controlled dispensing procedures.

Abstract: Methods and apparatus are provided for dispensing, simultaneously and automatically, a plurality of small quantities of powder under improved conditions of control. The arrangement is such that precise amounts of micro quantities of hard-to-handle powder may be dispensed into containers such as blood collection tubes. Included herein is a brush mechanism that reciprocates over a plate in a controlled manner, for sweeping a slug of powder deposited automatically on the plate in a controlled manner through a number of openings in the plate, and into an equal number of containers. The openings are dimensioned and configured to cooperate with the sweeping action of the brush, so that a desired precise quantity of powder is deposited through each opening into the waiting containers.

Abstract: An automatic retractable lancet assembly includes a housing with a sharp-pointed lancet movably mounted therein. A slidable plunger is mounted in the housing in the end thereof opposite from the lancet for loading the assembly prior to use. An actuating mechanism releases the lancet for outward movement from the housing. After this outward movement is completed, the actuator elements become dissociated from further movement of the lancet. Subsequently, the lancet is automatically retracted back inside the housing by virtue of a spring element.

Abstract: A cap is provided for a blood microcollection container which cap incorporates a partially open tubular and tapered scoop arrangement for engaging a puncture wound, and rapidly receiving blood from the wound. The scoop arrangement is such that a substantial end surface is provided for engaging a puncture wound for receiving blood, and rapidly transferring it to the microcollection container where a further large abutting angular surface engages the surface of the microcollection container. A vent is incorporated into the cap for air displacement for enhancing the rapid transfer of blood and avoiding coagulation. With this invention, the time of transfer is reduced substantially because a less precise positioning is required of the scoop, and the need to initiate a capillary action is avoided.

Abstract: An automatic retractable lancet assembly includes a housing with a sharp-pointed lancet movably mounted therein. A depressible plunger and slide mechanism actuates the movement of the lancet outwardly from the housing. After this outward movement is completed, the actuator elements become dissociated from further movement of the lancet. Subsequently, the lancet is automatically retracted back inside the housing by virtue of a spring element.

Abstract: A retractable lancet assembly includes a housing and a sharp-pointed lancet movably mounted inside the housing. A movable sleeve is adapted to urge the lancet point in a direction outwardly from the housing. This sleeve and surfaces on the housing contribute to automatically retracting the lancet point inwardly of the housing responsive to movement of the sleeve in the same direction that the sleeve urges the lancet point outwardly.

Abstract: An automatic switchover valve is described having a unique venting system whereby any areas which may cause a buildup in pressure during shuttling are normally vented to atmosphere. The shuttle is of a simple, easy to manufacture design having a central inwardly tapered portion which allows communication with internal parts of the valve to atmosphere. The valve also features sealing means which seal against moving surfaces without being subjected to rubbing on sharp surfaces or orifices, thus prolonging seal life.

Abstract: A folded cardboard carton has spaced perforations formed in a pair of opposing side walls. Each perforation is adapted to receive a stack of rubber cots, the stacks being formed by cots telescoped one inside the other. Tear away covers are mounted to said carton for covering and enclosing the stacks of cots suspended in the perforations. The covers are perforated to facilitate the opening of a portion of said cover at a time so as to serially expose the stacks of cots. A single cot is dispensed by inserting a medical probe into an exposed stack of cots and depressing the entire stack while locking the uppermost cot to the probe. The resiliency of the stacked cots facilitates removal of the uppermost cot without disturbing the remaining cots.