摘要:
The circuitry of the present invention taps a DS0 data stream and outputs a timing signal to drive terminal multiplexers. Even if the data bit stream is lost, the present invention continues to provide proper clocking signals. A composite clock (bit and byte clock) is provided by the present invention with the bit clock at 64 KHz and the byte clock at 8 KHz in the preferred embodiment. To avoid the problem of phase shift over long distances (limiting cable length) the present invention phase adjusts the digital bit stream clocking signal with a 360 degree delay, giving the appearance of advancing the signal in phase. An additional delay of one frame width is applied to the signal. A negative phase delay equivalent to cable runs from 0-1500 feet in 500 foot increments is also applied. In the preferred embodiment, a shift register is tapped in reverse order to accomplish this phase delay.
摘要:
The present invention provides a clock holdover circuit which will provide a replacement clock signal within predetermined parameters independently of time and temperature variations. The circuit of the present invention has only a single component which is time and temperature dependent. By selecting the components parameters to be within the desired tolerances, the accuracy of the circuit is maintained. In the present invention, digital circuitry is combined with an accurate local crystal frequency source to provide a replacement clock signal. The present invention allows phase consistency upon loss of a reference clock signal as well as on return of the reference clock signal. A reference clock signal is phase locked to a VCO to produce a desired output. The frequency of the output is compared to a local frequency standard to generate an offset frequency used to control a frequency synthesizer. The offset frequency is digitally stored. Upon loss of the reference clock signal, the stored offset frequency is used to drive the frequency synthesizer along with the local frequency standard so as to provide an acceptable replacement clock signal. The frequency comparator, storage, and synthesizer are all digital so as to be time and temperature independent. The local frequency standard is crystal based having known time and temperature tolerances. By choosing a local frequency standard having tolerances within a predetermined range, an acceptable clock holdover signal may be provided indefinitely. The replacement clock signal is phase compared to the reference clock signal so that no loss of phase occurs upon reference loss.
摘要:
A cast exhaust manifold for an engine is disclosed that is fastened to the engine by a number of independent flanges between each pair of which a spacer is positioned to produce an interference fit when the exhaust manifold is at ambient temperature. The use of independent flanges allow the exhaust manifold to expand when heated without creating high levels of internal stress and the spacers prevent undue distortion of the exhaust manifold when the exhaust manifold cools.
摘要:
A vacuum accessory tool has a nozzle body with a suction opening and a hose section for connecting the accessory tool with a hose of an external vacuum source. The nozzle body includes a serrated blade that can be used for grooming a domestic animal. The nozzle body further comprises a transparent or semi-transparent tool hood for viewing the area being groomed. The nozzle body is pivotally mounted to the hose section by a rotatable cuff for rotation of the nozzle body relative to the hose section. Adaptors connect the vacuum accessory tool to multiple different size hoses of a variety of vacuum cleaners.
摘要:
Ports for accessing a vessels within a patient include passageways that can guide needles or other access devices directly into the vessels. The ports can be implanted subcutaneously within a patient. Some ports may be used in the creation and use of vascular access buttonholes.
摘要:
The present invention is directed to a non-intrusive data transmission network for use in a healthcare facility and method for implementing such network. Each individual patient's room is equipped with a set-top control device, a separate camera, microphone, control module camera control device. The SCD allows for a non-intrusive installation within a minimum amount of time. By utilizing the existing cable television infrastructure, the device creates a high-speed data network throughout the facility. The interface between the SCD and the CCD is accomplished through a standard interface for universally connecting auxiliary devices, such as USB, for enabling expandable, hot-pluggable Plug and Play serial device interfaces. These ports allow external devices such as the camera, microphone, infrared keyboard and privacy control unit to communicate with the SCD. Additional USB ports on the SCD allow for other devices to be connected to the network at a future time. Such devices include those for instrument monitoring, doctor information access or pharmaceutical prescription ordering. Visual information such as e-mail, web browsing, video and audio communications via web camera applications from family members, friends or other parties may be viewed by the patient from the in-room TV set by way of the internal RF modulator (and connecting to the Internet via the patient Internet server). The SCD switches from the standard cable TV channels to the SCD by way of an internal switch controlled by the patient from an infrared control. This control also enables or disables the camera to allow for privacy at times when such privacy is required from external Internet access. The system is configurable to offer this privacy to be layered from specific Internet or external users to the nurses, doctors or security department as the hospital desires.
摘要:
Disclosed is a system for the detection of cardiac events (a guardian system) that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using one or more detection algorithms, the cardiosaver can detect a change in the patient's electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the guardian system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means). If the guardian system is put into a pacemaker, the algorithm can utilize a different analysis of the electrogram depending on whether or not the pacemaker is actually pacing the heart.
摘要:
An air filter assembly for removing particulate matter from an incoming dirty air stream. The assembly includes a housing having an inlet, an outlet, a dirty air chamber and a clean air chamber and a non-cylindrical shaped elongated filter element arranged within the dirty air chamber constructed to remove particulate matter from an incoming air stream. A plurality of non-cylindrical filter elements are preferred. The non-cylindrical filter elements provide a decreased incoming air stream velocity when compared to conventional cylindrical filter elements having the same surface area. Alternately, the non-cylindrical filter elements allow an increase in the volume of incoming air when compared to conventional cylindrical filter elements having the same surface area.
摘要:
Disclosed is a system for the detection of cardiac events that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using different algorithms, the cardiosaver can detect a change in the patient's electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means) which are activated after the ST segment of the electrogram exceeds a preset threshold.