Abstract: A guide for use with a manual pipette used in loading well plates is provided which insures the accuracy and efficiency of reservoir loading. The pipette guide is used in combination with a conventional well plate generally having 96-384 reservoirs. The guide allows for more exact delivery of liquid reagents to selected reservoirs without concern for missing or duplicating particular reservoirs during loading. The pipette guide is releasably locked onto the well plate and a slide outlines a specific row of reservoirs. In addition a reservoir isolator allows delivery to a single selected reservoir and protects against cross-contamination. Adjustable rods with notches therealong allow the slide and isolator to be precisely moved and indexed as desired.

Abstract: An undulating mixing device for precise, controlled agitation of sensitive biological and chemical solutions provides a base and a platform connected by four flexible connectors, a spring loaded motor mount assembly pivotally attaching a motor to the base, a turntable rotatably attached to the base, a tilt assembly pivotally and rotationally attached to the turntable and rigidly affixed to the platform, and a motor shaft that engages a groove on the turntable for causing rotation thereof. The tilt assembly includes an adjustable collar which controls the tilt or yaw movement of the platform as the motor effects rotation of the turntable. A selectively adjustable speed control switch sets the desired rotational speed of the motor via a microprocessor. The device functions without modification on a plurality of selected voltages and frequencies for achieving the desired rotational speed.

Abstract: An undulating mixing device for precise, controlled agitation of sensitive biological and chemical solutions provides a base and a platform connected by four flexible connectors, a spring loaded motor mount assembly pivotally attaching a motor to the base, a turntable rotatably attached to the base, a tilt assembly pivotally and rotationally attached to the turntable and rigidly affixed to the platform, and a motor shaft that engages a groove on the turntable for causing rotation thereof. The tilt assembly includes an adjustable collar which controls the tilt or yaw movement of the platform as the motor effects rotation of the turntable. A selectively adjustable speed control switch sets the desired rotational speed of the motor via a microprocessor. The device functions without modification on a plurality of selected voltages and frequencies for achieving the desired rotational speed.

Abstract: A machine for producing spiral seamed hollow pipe having a central axis from a metal strip having a first side which becomes the inside surface of the spiral pipe, a second side which becomes the outside surface of the spiral pipe, a width, and two outer edges. The machine includes a being roller station wherein the metal strip is formed into a helix using rolling contact. As the strip is driven through the bending roller station the strip is continuously bent on a bending line which is parallel to the central axis of the spiral pipe and which extends across the metal strip at an angle offset from a right angle with reference to the outer edges of the strip. Within the bending roller station there are a plurality of rollers organized as what may be viewed as staggered roller segments extending across the strip along the bending line which is offset from a right angle. At the same time, the rotational axes of the rollers are perpendicular to the strip.

Abstract: A blood pressure cuff having a pair of flexible gas-impermeable sheets wherein each of the sheets has an inner and an outer side and wherein the inner sides are placed in contact and the edges of the sheets are fused along a periphery thereof to form an interior chamber. At least one hook fastener portion is disposed on one outer side of one of the sheets and at least one loop portion is disposed on an outer side of the other of the sheets. A conduit means is attached to one of the flexible sheets for connecting to a source of pressurized fluid for allowing inflation and deflation of the interior chamber. The sheets are fused together by RF welding along a perimeter of one outer side of one of the sheets. The hook fastener portion, the loop portion, and the conduit means are each RF welded to an outer side of one of said sheets.

Abstract: An ear tip for use on stethoscopes, audio head sets and similar apparatus is shown having a relatively rigid inner body and an outer flexible soft body that can compress to accommodate outer ear canal configurations in comfort and efficient sealing contact without hinging or folding over so as to restrict sound transmission therethrough. A tubular guiding ferrule configuration insures proper alignment and maintenance of sound transmission efficiency with user comfort.

Abstract: A connector for joining one end of a rigid stethoscope ear tube to a multiple leaf binaural spring within a flexible tube that is attached to the stethoscope chestpiece, having a housing for rotatably supporting one end of the rigid ear tube so that it rotates about its own axis, with the housing and springs positioned inside the flexible tube so that the ear tube and the flexible tube are placed in aural communication. The housing is biased to place a holding force on the ear tube of between 2 and 10 pounds inches torque.

Abstract: An improved multi-leaf spring assembly is provided that permits greater flexibility and smoother, smaller folding of a stethoscope without deforming an individual user's adjustment. The spring leaves are held together at the ends by a spring clip. A cylindrical ferrule at each end of one leaf snaps into a groove in the lower end of an ear tube and is secured against removal by a spring clip. The entire assembly is encapsulated in an elastomer material to maintain the assembled parts in position while allowing swiveling of the ear tubes.

Abstract: The circular crystal of a temperature indicating instrument has a circular flange rotatable in a channel in the instruments' casing. Fingers on the casing have teeth which mesh with teeth on the flange. The fingers yieldably hold the crystal in place but the crystal can be forcibly rotated.The crystal has a slotted post thereon and on said post is a bimetallic spiral coil the inner end of which is in the post's slot. Another post in the casing covers the slot to keep the coil in place on the former post.On the back of the casing is a supporting bracket adjustable to several positions.

Abstract: A barometer having an index on the crystal. The crystal is freely rotatable for setting the index. The barometer case has spring fingers preventing the crystal from being removed therefrom unless the fingers are disengaged by means of a suitable tool.