Abstract: Disclosed herein is a medical diagnostic device for determining bleeding times and behavior of bleedings from a standardized wound, (hemmorrhagometry), wherein a flow of a rinsing liquid past the wound is established, thereby to cause the rinsing liquid to contact the wound. A photometric instrument or equivalent is provided for determining a characteristic of the rinsing liquid which is representative of the proportion of blood contained in the rinsing liquid having contacted the wound. The device of the invention is designed such that it permits controlling the temperature of the rinsing liquid and consequently of the bleeding location and of its surrounding area, in order to keep them on a preselected temperature.

Abstract: A measuring sensor head for determining the contents of gases in liquids, particularly for transcutaneous determination of oxygen in blood, as well as a method of manufacturing such sensor head are disclosed. In accordance with the invention, the gas-permeable membrane which covers the front face of the sensor head and which, during use, is applied to the human skin, is preshaped to assume a cap-shaped configuration. This eliminates previously occurring measuring errors due to uncontrollable stresses causing thickness variations generated in conventional membranes and, moreover, provides for an improved sealing effect between the housing of the measuring head and the membrane.

Abstract: A spring lancet holder for creating accurate standardized, reproducible puncture wounds in the skin for medical diagnostic purposes is disclosed in which accuracy and reproducibility is improved by minimizing the recoil transmitted to the lancet holder by actuation of the drive mechanism which pushes the lancet into the skin. In a preferred embodiment, a mass is shown which is caused to move in opposition to the motion of the lancet caused by a striker spring which is mounted between the lancet and the mass.

Abstract: A device is disclosed for applying a gas permeable membrane to an electrode. A collar is used to hold the membrane on the electrode. The device includes a guide bushing for forcing the collar over the membrane onto the electrode and includes a soft surface for maintaining a constant pressure against the membrane surface during the application.

Abstract: In a DC to DC converter, an improvement for reducing the peak current level through the electronic charging switches including an inductance in series between the junction of the clamping diodes and the junction between the primary side of the transformer and the primary capacitor.

Abstract: A digital angle to resolver/synchro converter is disclosed which utilizes the tangent of the input angle in a unique feedback loop.

Abstract: This device uses a piezoelectric crystal for converting electrical energy into mechanical vibrations which are transmitted to a dental workpiece for use in cleaning teeth. The device includes a front cap having flats which engage flats on the tip base attached to the dental workpiece and allows dental workpieces to be interchanged. The device includes a tie rod disposed within the tubular crystal around which water circulates between the tie rod and the tubular crystal. Axial bores allow passage of the water to the tip of the workpiece to wash away debris on the teeth during cleaning.