Patent GB-190718064-A (GB)
Title: Improvements in Manometric Apparatus for Recording the Flow of Fluids in Pipes
Inventor: CONNET FREDERICK NEVIUS
Filed: 1907-08-08
Granted: 1908-05-28
Abstract: 18,064. Connet, F. N. Aug. 8. Gauges; integrating-mechanism for measuring- apparatus.-Relates to a recording manometer, for use in conjunction with a Venturi tube, of the type in which integrating-apparatus adapted to show the total quantity of fluid passing through a tube in a given time and the rate of flow at any instant is provided, and consists in improvements in the manometer and means for operating the recording- mechanism, and also in certain details of the integrating-mechanism. The limb 3, Fig. 1, of a manometer of U-tube form is connected by the pipe 66 with the wide portion of a Venturi tube at 65, and the limb 2 by the pipe 68 with the reduced portion at 67. Floats 18, 17 operate by means of racks 22, 20, Fig. 2, and pinions 23, 21 in the circular chambers 11, 8, the shaft 13 carrying the cam 14, a suitable bearing 15, stuffing-box 16, and stand-pipes 9, 12 being provided to keep the apparatus fluidtight. When in their lowest positions, the floats 17, 18 automatically cut off communication between the limbs of the manometer and thus prevent further action of the pressure on the mercury, either by being shaped so as to fit into correspondiog recesses 4, 5 in the float chambers, or by the provision of suitable valves. The bell-crank lever 41 pivoted at 42 carries a roller 43 bearing on the cam 14, and thus moves the sliding carriage 26, the wheels 27 of which are supported by the guide-bar 28. A weight 45 attached to the carriage by a cord 46 passing over the pulley 48 keeps the roller 43 of the bell-crank lever in contact with the cam 14. A flexible connexion between the cam and the carriage may be substituted for the bell-crank lever 41. An arm 39 attached at its lower end to the carriage carries a pencil 40 in contact with the clock-rotated record-disk 37. The latter is divided as shown by twenty-four radial lines representing hours, and by a number of concentric circles representing gallons or other convenient units of measure. The integrating-apparatus is as follows. The carriage 26, Fig. 4, is provided with a contact-wheel 32 carried by a shaft 31, which operates through bevel-gearing 33, 34 the spindle 36 attached to a counter 35. The contact-wheel is driven as usual by the face of the clock-rotated disk 24, and thus, as the carriage 26 is moved by means of the cam 14, the speed of rotation of the contact-wheel will vary according to its distance from the centre of the disk. The cam may be shaped so as to compensate for any want of correspondence in the bore of the tubes. Provision for taking up the wear of the periphery of the contact-wheel 32 consists in mounting the bar 53, Fig. 5, carrying the shaft 56 of the contact-wheel, in a guide-plate 54 provided with springs 55, the shaft 56 being flexibly connected at 57 with the shaft carrying the bevel-wheel 33. The contact-wheel may be provided with one or more transversely-arranged auxiliary wheels 58, Fig. 6, in order to facilitate its movement across the face of the disk 24. In a modification, shown in Fig. 10, the contact-wheel is mounted on a carriage 70 guided by the rod 69, and slides along the shaft 31.