Abstract: An improved control is provided for the tape transport motor of a battery-powered, slow-speed tape recorder typically used for producing magnetic recordings of an ambulatory patient. The recorder's tape transport means is driven by a synchronous AC motor powered from a DC (battery) supply. That DC supply, during normal operation, is voltage regulated to provide desired speed stability. That DC supply is inverted into a square wave DC current in a manner effectively providing a regulated square wave AC at twice the regulated DC voltage. Phase-shifting means connected to the inverter provide a phase-shifted square wave source necessary for the two-phase AC synchronous motor. In an improved mode of control, means are additionally provided for selectively supplying current at full battery voltage, square wave inverted and phase-shifted to the AC synchronous motor in lieu of the regulated supply voltage to provide high torque operation for selected periods of time as during "start-up" or "warm-up".

Abstract: A combined threaded fastener and a collar adapted to be secured to the fastener around the shank portion of the fastener adjacent the head thereof. The shank portion of the fastener is adapted with a shoulder portion disposed adjacent the head portion and extending lengthwise of the shank of the threaded fastener for a predetermined extent. Adjacent the shoulder is an annular groove which in the preferred embodiment is generally circular in cross-section. The collar has an annular flange which serves as the bearing portion and is adapted to cooperate with the head portion of the fastener and a sleeve portion attached or extending longitudinally of the flange or bearing portion. The sleeve portion has a diameter sufficient so as to receive the shank portion of the fastener therein. The sleeve portion of the collar is also adapted with an annular groove which again in the preferred embodiment is substantially of circular cross-section.

Abstract: A razor blade having guard elements deposited in recessed guard seats formed in the cutting edge and flanking surfaces of the blade. The guard elements may be deposited by electrochemical plating and their retention on the blade is enhanced by the recessed seats formed in the blade surfaces. The guard seats extend rearwardly from the blade edge a significant distance and may be interconnected by a transversely extending locking guard seat into which guard element material is also deposited.A method for applying the guard elements to the blade comprises applying a photoresist material to the blade edge and adjacent region, fixing a photographic image on the photoresist material in accordance with a predetermined guard element pattern, removing a portion of the photoresist material in accordance with the pattern and etching the underlying blade to form the guard seats.

Abstract: A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.

Abstract: A device for use in the art of fitting lenses to spectacle frames wherewith ophthalmic measurements are applied directly to frames selected by patients. A frame without lenses is adjusted to fit the patient, the measuring device is then applied to the frame and the whole placed upon the face. Horizontal and vertical measurements of distances from lateral and inferior points on the frame rims to a desired location of lens optical center relative to pupil are made for each eye and these measurements are forwarded to the lens finishing shop for edging and fitting of the lenses.

Abstract: An improved twin blade razor system having a unitary member positioned between the pair of blades for both spacing the blades and ejecting shaving debris from that space. The unitary member, which may conveniently be of injection molded plastic, includes a spacer portion, an ejector portion, and biasing means connecting the ejector portion and the spacer portion for biasing the ejector portion to a normally retracted position relative to the blades and spacer. The ejector portion extends across in front of but is substantially discontinuous behind the spacer portion, resulting in a compact front-to-rear configuration for the unitary member which may be housed in a relatively compact twin blade system. The ejector portion is manually displaceable to an advanced ejecting position. The biasing portion may be one or more beam springs connected and configured to reduce distortion and/or stressing of the relatively moving portions of the member during actuation.

Abstract: An apparatus, including a pair of spaced-cylinder lenses having their cylinder axes in one plane with a third cylinder lens slideably mounted on a carriage therebetween and having its cylinder axis positioned normal to the plane, permits the focal power in one principal meridian to be continuously varied by moving the carriage with the third cylinder lens. The lenses are supported by a rotatable assembly and the slideable carriage is supported by a track running parallel to the optical axis.

Abstract: In apparatus including a cathode ray tube, electrical circuitry for preventing "burn" spots in the phosphor of the cathode ray tube. The protective apparatus includes means to measure the rate of change of deflection of the electron beam of the cathode ray tube and means to measure the brightness level of the electron beam. The absolute value of the rate of change of the deflection of the beam is divided by the brightness level of the beam to produce a signal which is compared to a reference value. If the dividend exceeds the reference value, the CRT is shut down as in the preferred embodiment by blanking the cathode ray tube beam.

Abstract: A consolidated input connector-selector switch and calibration switch for a medical instrument wherein the input connector and switch is mounted in the medical instrument housing partially in registry with an opening through the panel thereof. The selector switch is a multi-position rotary switch of a plurality of input and output terminals rotatable through a discrete number of positions. The switch is adapted to receive a connector having a plurality of signal leads and is operably connected with through drive means with the selector switch by rotation of the input connector rotates the selector switch. Additionally, the combination connector-selector switch is movable between forward and rearward positions being preferably biased forwardly and coupled with calibration switch means such that axial movement of the connector-selector switch combination actuates the calibration function within the medical instrument.

Abstract: A range finding fiberscope for measuring the distance of a point in space from a reference plane. The device is adaptable to use in confined spaces and has a variety of applications including industrial, medical and photographic.

Abstract: A support for an inverted microscope nosepiece. The support is spring-loaded to prevent accidental damage to its objectives and enable a change of objectives independently of focusing adjustments.

Abstract: An illuminator for a line-scanning document copier including a fan-shaped array of optical fibers with light-output ends juxtapositioned along a line, and opposite light-receiving ends tightly bundled together. Light loss from fiber breakage, gaps and other defects inherent in fiber optic arrays cause non-uniform illumination of documents and streaks in the copy. Uniform and high level illumination are accomplished according to this invention with cylindrical light-refracting means placed between the line of fibers and the document to blend emitted light astigmatically.

Abstract: A follower mechanism is used to determine the precise location of a moveable mirror in an Abbe Refractometer to provide the necessary information for converting mirror position to index of refraction. The mechanism is particularly suitable for conversion and readout by electronic means.

Abstract: In apparatus such as a defibrillator having a CRT display of an ECG wave, and an alternative display of the firing time of the defibrillator pulse in relation to the ECG wave, the inclusion of method and apparatus for orienting the waveform to a synchronization indicator. In the preferred form, the display is a single, non-fade stationary complex of the ECG wave starting prior to the occurrence of the oriented "P" wave. The display is timed through combination of clocking pulses responsive to a wave detection apparatus and a recirculating memory which establishes an orienting marker. The clock pulsing includes a predetermined delay to initiation of display from the data recirculating memory such that the data display is coordinated in time to a fixed reference.

Abstract: A pair of cylinder lenses have a combined power of zero when their cylinder axes are parallel and a small cross cylinder power when one lens is rotated until its axis is perpendicular to the cylinder axis of the other lens. Cross-cylinder lenses are used to determine the accuracy of the cylinder power and cylinder axis selected by the practitioner. By mounting one cylinder lens in a motor-driven ring-like lens mount having a member which engages another ring-like lens mount, a single motor can be used to drive both lenses; select between parallel cylinder axes and crossed cylinder axes; and rotate the crossed axis lenses as an assembly to the desired position.