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    • 5. 发明专利
    • Improvements in Clock Controlled Apparatus for Checking Watchmen and the like
    • GB190610631A
    • 1906-11-15
    • GB190610631D
    • 1906-05-07
    • PATTERSON ANDREW VINCENT
    • PATTERSON ANDREW VINCENT
    • 10,631. Patterson, A. V. May 7. Tell-tale clocks for checking watchmen &c. At predetermined times, the clock completes electric alarm circuits unless the watchman on his round operates other contacts in the circuits, means being provided for rendering a fixing of the contact by the watchmen ineffectual. The hour spindle of the clock carries two wheels C, C' which are loose upon it, are weighted so as to return to the same position when free, and have each a projecting pin for contacting in a given position with one of the depending arms E, E in the alarm bell circuit. Moving with the clock spindle but feathered to slide thereon is a clutch member D, which normally, when the electromagnet H is de-energized, is in gear with wheel C, but when this wheel has turned so far that its pin strikes the contact arm, the alarm circuit is completed and the electro-magnet therein attracts its armature to move the clutch momentarily into gear with the wheel C'. If, however, the distant contact in the circuit has previously been made by the watchman, the armature and clutch will move in the same way, and should this contact be held down, the pin on the wheel C' will also cause the bell to ring after a time. If the clock is to control a number of alarms, as many wheels C may be employed, or with a single wheel a circuit-determining dial G may be combined, whereby the movement of the hour-hand determines at any time which circuit shall be completed by a contact with the arm E.
    • 8. 发明专利
    • COMPACT MANIFOLDED FAIL SAFE HYDRAULIC CONTROL SYSTEM
    • CA2535326A1
    • 2007-05-18
    • CA2535326
    • 2005-11-18
    • PATTERSON ANDREW JOHN
    • PATTERSON ANDREW JOHN
    • F16K31/122F15B1/04F15B1/26F15B20/00F16K17/10F16K27/00F16K31/143
    • The compact manifolded hydraulic fail safe control system is used to control the operation of a spring return actuator which in turn strokes the pipeline valve from the normal operating position to the fail safe position, or from the fail safe position to the normal operating position. The 2-way dump valve opens to circulate the spring return actuator's cylinder volume t o the reservoir. The pipeline valve will automatically stroke to the required fail-safe position Without an external power source. Pipeline valves operated with quarterturn or linear type sprin g return actuators can be operated using the manifolded hydraulic fail safe control system. The 2-w ay dump valve is opened when the regulated signal pressure is removed. The manifolded hydraul ic fail safe control system incorporates a regulated signal pressure circuit and a pressu re circuit maintained at the actuator operating pressure. The regulated signal pressure to the 2-way dump valve is removed when pipeli ne pressure exceeds the 3-way pressure pilot's high or low set-point. Likewise the 2-way dump valve regulated signal pressure is removed when the 3-way S.C.A.D.A. valve receive s a signal. When the 2-way dump valve is opened the spring return actuator cylinder volume is circulated to the reservoir across the regulator (pressure regulated cylinder dump) or across a diffuser (high--pressure cylinder dump). High pressure and low-pressure relief valves are used to limit system pressu re upstream and downstream of the regulator. A low-pressure accumulator is provided to accommodate ambient temperature fluctuations. The hydraulic fail-safe control system can be reset, or "re-charged", by han d pumping in order to refill the spring return actuator cylinder volume and return the pipeline valve to it's normal operating position. The 2-way dump valve's lever is first rotated to the horizontal plane, from the vertical plane. Then the manual hand pump is cycled until the spring return actuator and pipeline valve have returned to their normal operating positions. Alternatively an electrically powered pump enclosed in the reservoir can also be used to reset the system. The system is reset when the 2-way dump valve's latch lever automatically repositions itself in the vertical plane and the line valve is in the normal operating position. When reset the system is able to monitor pipeline pressure and process conditions. The pipeline valve s' fail-safe valve position can be achieved manually by applying axial hand force to the 2-way dump valve lever. This hand force acts against 2-way dump valve internal pressure tomanually open the dump valve. All of the fail-safe hydraulic control system proprietary components are assembled and/or installed into a single pressurized manifold.