Time Computer, Inc.

Novatec, Inc.

Arthur H O'Connor

Robert E McCullough

Robert A Rossman

John M Bergey

A digital readout electronic blood pressure and pulse rate monitor. A finger cuff occluder is pressurized by a single stroke plunger and an automatic vent means provides linear pressure decay while a pressure transducer measures the pressure and converts it to an electronic signal. A sound transducer senses sound transmitted from the cuff through the pressure tube, and an electronic system distinguishes the various characteristics of the sound to measure the systolic and diastolic pressures. The electronic system also measures the pulse rate. All three readings are digitally displayed only if several predetermined conditions indicating a proper reading are fulfilled.

Blood pressure monitor

A pulse rate monitor for use while exercising. A clothespin type finger clip remote from the counting and display unit grips the user's finger in a predictable, mechanically stable manner. A light emitting diode, strobed to reduce battery drain, transmits infrared radiation through the finger, and electronic circuitry monitors the modulation of radiation caused by changes in capillaries with each heart beat. The circuitry includes an active load for the phototransistor, which, by means of bandpass filtered feedback, enhances heart beat signal and reduces sensitivity to ambient light, noise, and variations in phototransistor characteristics.

Pulse rate monitor

Disclosed is a solid state wristwatch of relatively small size useful as a small man's watch or even a ladies' watch. It incorporates an arm responsive inertial switch for energizing a light emitting diode display. The display forms part of a timing module and is mounted on one side of a laminar ceramic substrate. Mounted on the other side of the substrate is a combination timepiece and calendar circuit chip. Printed circuits are formed on non-contacting surfaces of the substrate laminations and interconnected by conductive pins. The entire timing module is staked to a plastic frame which also carries the watch batteries, quartz crystal, trimmer capacitor, switches, or other watch components.

Solid state watch with inertial switch

Disclosed is a solid state wristwatch of relatively small size useful as a small man's watch or even a ladies' watch. It incorporates an arm responsive inertial switch for energizing a light emitting diode display. The display forms part of a timing module and is mounted on one side of a laminar ceramic substrate. Mounted on the other side of the substrate is a combination timepiece and calendar circuit chip. Printed circuits are formed on non-contacting surfaces of the substrate laminations and interconnected by conductive pins. The entire timing module is staked to a plastic frame which also carries the watch batteries, quartz crystal, trimmer capacitor, switches, and other watch components.

Disclosed is a solid state wristwatch of small size particularly adapted for use as a ladies' watch. A plurality of small individual display stations formed of light emitting diodes are mounted on one side of a laminar ceramic substrate. The stations are viewed through a window formed of hardened red glass arcuately curved in the direction of the long dimension of the display. The watch case or bezel is similarly curved to conform to the window providing a more pleasing appearance and to conserve space.

Solid state ladies' wristwatch

Disclosed is a solid state wristwatch having a digital light emitting diode display and a low battery voltage circuit for actuating the display to indicate the approach of battery failure. The battery voltage sensing circuit draws power only when the display is energized and causes one of the display stations to blink. It comprises a silicon band gap reference voltage circuit for comparing the battery voltage with a reference voltage that is independent of temperature and battery voltage variations.

Low voltage battery indicator for a solid state watch

Disclosed is a solid state wristwatch having an active electro-optical display in the form of light emitting diodes. The display is mounted on one sloping side of a groove in a circular module frame and comprises a ceramic substrate having the display on one side and a large scale integrated circuit on the other. The angular orientation of the display coincides with the axis of an angularly oriented viewing window constructed so that the watch case shades at least part of the display. Viewing under bright daylight is enhanced and through ambient light responsive control of current to the display, battery energy under most viewing conditions is conserved.

Light emitting diode wristwatch with angular display

Disclosed is a highly stable CMOS oscillator for use as the master time reference in a wristwatch. A novel bias circuit comprising a CMOS pair and a relatively large resistor supply a bias voltage to the amplifier of the oscillator. The resistor can be made larger than normal because it is outside the oscillator feedback loop and does not reduce the amplifier open loop gain.

CMOS oscillator having bias circuit outside oscillator feedback loop

This invention relates to a solid state timepiece and more particularly to an electronic watch which employs no moving parts. In the present invention a frequency standard in the form of a crystal oscillator acts through a solid state electronic circuit divider and display actuator to power in timed sequence the light-emitting diodes of an electro-optic display. Low cost, low power consumption and small size and weight are achieved through the use of a charge coupled binary divider chain.

Growing community of inventors

Lancaster, PA, United States of America

Arthur H O'Connor