Abstract: A removable insulating jacket for the body section and funnel section of a bottle carried in a cage affixed to a bar of a bicycle in which the insulation for the body section is formed from foam having skin on at least one surface that is compressed to form flaps that are used to secure that portion to the bar and tabs for closing off the rear end. The insulation for the funnel section is formed from an arcuate sheet of foam that is connected end to end to form a frustum having ridges therein to enable a cyclist to obtain a good grip thereon when the bottle is to be removed from the cage.

Abstract: A switch matrix for a transceiver of ultrasonic waves containing a configuration of electroacoustic transducer elements in which in succession proceeding over the arrangement a group of transducer elements can be activated, contains a number of inputs (K1, K2, K3, K4), the number corresponding to the number of transducer elements of a group which are each connected to one of the activated transducer elements, an equal number of outputs (R1, R2, R3, R4) connected to delay elements and a large number of switches T11, T12, . . . , T44) to establish each of the connections required for electronic focusing between the inputs and the outputs. Each input line (K1) is connected to a number of switches (T11, T12, T13, T14), this number corresponding to the number of transducer elements of a group. The switches of the switch matrix are activated through a control circuit (50) over a number of control lines (L1, L2, L3, L4), this number corresponding to the number of transducer elements of a group.

Abstract: An apparatus is disclosed for providing the projections of signals supplied to two inputs on mutually perpendicular axises by applying a different combination of the signals respectively at said input terminals and quadrature phases of an AC wave to each of four phase detectors or by applying each combination in sequence to each phase detector. Means are provided for calculating impedances from the outputs of the phase detectors when the voltages applied to the inputs are respectively those appearing across an unknown impedance and a calibrated resistor that is in series with it, there being an AC voltage applied across the series circuit.

Abstract: Apparatus for deriving signals indicating a condition of tissue within an area by launching spaced supersonic pulses into a body under examination and detecting the power of supersonic waves scattered from locations along a plurality of known paths. Gain control elements are provided for compensating for changes in amplitude of the scattered supersonic waves resulting from their passage through blood or tissue, the increased attenuation with frequency of the spectrum of the launched pulses and the focussing of the launched pulses. Compensation for ring-down and the attenuation of the chest wall is also provided.

Abstract: In text formatting apparatus, means for inputting text, means for restricting formatting each line, means for storing characters to be used in the restriction formatting, and means responsive to a given command for changing the stored characters.

Abstract: A catheter for use in apparatus for deriving a signal corresponding to the blood pressure of a patient, said catheter comprising means defining a lumen in said catheter, a transducer mounted at a distal end of said lumen, and a compliance means in said lumen.

Abstract: Current passing through a capacitor being measured is combined with programmable portions of oppositely phased current, and means are provided for deriving voltages from said combined current that lie within a given range regardless of the capacitance of the capacitor under test. A phase detector determines the phase angle between the latter voltage and the voltage causing current flow through the capacitor. The means for deriving the out-of-phase current includes a plurality of programmable, current transducer having their primary windings connected in series, one end of each secondary winding being connected to one end of its primary winding, and switches respectively connected to the other under the secondary winding. The means for deriving the voltage referred includes an operational amplifier and switches for connecting a similar plurality of current transformers in series with the capacitor being measured as in the feedback of the amplifier.

Abstract: Apparatus for classifying QRS complexes as dual chamber paced, atrially paced or ventricularly paced by assigning complexes to groups in accordance with shape, deriving the intervals between pace pulses and their respective QRS complexes, determining if the intervals for a given number of recent complexes from the group to which the current QRS complex is assigned are clustered, and classifying the current QRS complex by the correlation between the intervals of its pace pulses and the intervals of said clusters.

Abstract: Apparatus for measuring the dynamic characteristics of an ADC in which the clock for a generator of digitized words representing a plurality of cycles of an analog wave to be derived from them by a DAC and applied to the ADC being measured is derived from the same source as the clock for the ADC. The ratio between the frequency of the plurality of cycles and the frequency of the clock is irreducible.

Abstract: Apparatus for effectively eliminating pace pulses from an ECG wave without introducing distortion comprising means for comparing the slope of the ECG wave with a threshold slope derived from the wave that is greater than the maximum slope produced in the wave by heart action and substituting values for a portion of the wave between first and second points on either side of the place in the wave where its slope exceeds the threshold value, the substituted values being interpolations of the value of the ECG wave occurring at said points. In a preferred embodiment means are provided for preventing the substitution from occurring unless a pace pulse is detected within a given distance of the said place in the ECG wave and means are also provided for setting said first point at a place in the ECG wave that occurs prior to a tail that precedes it.

Abstract: Ultrasonic apparatus for representing the velocities of flow of fluid occurring with an image plane by changing the hue and intensity of the colors with changes in flow rate.

Abstract: A power controller having first and second power outlets, connections between one side of an A.C. line to one side of each outlet, a current sensing impedance connected between the other side of the A.C. line and the other side of the first power outlet, a triac connected between the other side of the A.C. line and the other side of the second power outlet, a first operational amplifier normally maintaining the triac in a non-conductive condition and a second operational amplifier to cause current to flow through the triac to the second power outlet after a selected time delay whenever an appliance such as a power tool that is coupled to the first power outlet draws a given amount of current through the sensing impedance.

Abstract: A D.C. power supply in which the output capacitor used in the CV mode of operation is removed from the output circuit in the CC mode of operation and charged to the voltage between the output terminals so as to prevent transients or switch stressing that could be caused when the output capacitor is reconnected to the output circuit for CV operation. In a preferred embodiment, first and second FET's are connected in series between the input and output terminals of the supply. While the first is used for control during CV operation, the second is in saturation, and while the second is used for control during CC operation, the first is in saturation. The output impedance of the supply is decresed during CV operation by connecting the source electrode of the first FET to the output electrode, and the output impedance of the supply is increased during CC operation by connecting the drain electrode of the second FET to the output electrode.

Abstract: Ultrasound imaging apparatus having an array of electro-acoustic transducer rings, means for exciting said transducer rings in sequence so as to cause them to transmit successive pulses of pressure waves along a path at intervals at least equal to the time of transit of the pressure waves to a maximum range and back to the array, dynamically controlled delays respectively coupled to each transducer ring that bring the electrical signals the transducers supply in response to pressure of waves of each pulse that are reflected along a given range into reasonable phase coherence, processing means coupled to the delays so as to provide a composite signal, and a summing memory coupled to receive the composite signal.

Abstract: A circuit is described for controlling the speed of an A.C. motor driving a cooling fan in response to the temperature at a point being cooled in which a temperature responsive impedance is used to control the current in an impedance of the output circuit of an amplifier that is connected in series or parallel with the windings of the motor.

Abstract: A calibration circuit in which low valued resistors are respectively connected in series with transducer outputs and switching means are provided for connecting resistors in the circuit so as to produce a voltage across the low valued resistor that corresponds to a given value of a phenomenon applied to the transducer.

Abstract: A patient arrhythmia monitoring system having a plurality of bedside stations that can derive physiological data for a patient coupled thereto, a central station, a bus for providing communication between said bedside stations and said central station. A processor is provided for analyzing the data from each station. Criteria for the indication of an alarm for a bedside station can be set at that station and at the central station. When an alarm is indicated for a bedside station, the data causing it can be viewed at that station as well as at the central station. Selected alarm data is temporarily stored by said processor in such manner that the data for any bedside station can be recalled at the bedside station from which it came and at the central station, A printer is provided for printing the selected alarm data for any bedside station on a separate page.

Abstract: Estimates of the average velocity and turbulence of blood flow are determined by weighting the instantaneous frequencies of a returning Doppler signal. The weighting can be chosen so that the estimates are optimized. The weighting can be chosen so as to duplicate the algorithm of other ultrasound flow imaging systems.

Abstract: A tubing coupling device constructed in accordance with this invention is comprised of a rigid body having cavity therein, an aperture communicating with the smaller end of said cavity and a tapered ferrule having an axial passageway that is aligned with the aperture. Means such as a nut that is in threaded engagement with the end of the rigid body opposite the aperture forces the ferrule into the cavity. The relative shapes and dimensions of the cavity and the ferrule are such that as the ferrule is forced into the cavity it is subjected to radial compression so as to attain intimate contact with the exterior surfaces of the end portions of tubes that are inside the ferrule.

Abstract: Apparatus for simulating a candle flame in which the current through the filament of a bulb is varied from a first value to a second value and back to the first value during spaced periods that vary from a period of maximum duration to a period of minimum duration that produces no observable flicker in an apparently random manner.