Patent GB-190618511-A (GB)
Title: Improvements in and relating to Liquid Meters.
Inventor: CAHILL DANIEL
Filed: 1906-08-17
Granted: 1907-08-15
Abstract: 18,511. Cahill, D. Aug. 18, 1905, [date applied for under Patents Act, 1901]. Liquid meters.-In meters for those liquids not liable to produce a deleterious effect on metals, the operating-parts are immersed in the liquid, the action of the distribution valve is made nearly instantaneous, and two sets of concentricallymounted counter dials are used. The cylinder 3 is closed at each end by covers 4, 4<a>, fitted internally with sleeves 5, 5<a> in which piston-rods 6, 6<a> are mounted freely, the sleeves and pistons having coned ends. The piston 7 contacts with the rods 6, 6<a> just before it reaches the end of its stroke and pushes them outwards, thus transmitting movement to the shuttle 8 by levers 9, 9<a> which are pivoted at 10, 10<a>, the other extremity being forked and adapted to embrace the pins 12, 12<a> on the shuttle. The shuttle passes through guides 13 ... 13<c>. The levers 9, 9<a> move the shuttle over a part only of its course, the remainder being completed by the action of a pair of calliper legs 15, 15<a> held by a spring 17. At the instant that the levers 9, 9<a> cease to act on the shuttle, the spring levers 15, 15<a> pass the dead-centre of the cam 20 and instantaneously complete the action of the shuttle. The lever 21, pivoted on the bracket 23, engages a slide valve 24 at one end and the forked end embraces the pin 25 on the shuttle 8. The valve 24 is thus enabled to connect the discharge port 26<b> with whichever port 26 or 26<a> is momentarily closed to admission. With this apparatus, the cone valves 6, 6<a> are closed immediately the admission on the same side of the piston is closed by the slide valve 24. The measuring- apparatus 27 of ordinary type is actuated by a pin 27<a> fixed to the lever 9. The mechanism for the indicating-disks comprises a ratchet-wheel 32 fixed on the axle 33, which also carries a pinion 34 engaging the wheel 35 fixed on the axle 36. The lever 37, pivoted at 33, carries a ratchet engaging the wheel 32 and operated by the alternating movement of the pin 25. A spring 40 keeps the coned part of the axle 36 on its seat 39, thus preventing the passage of liquid through the casing. The pinion 41 engages the free wheel 42. The axle 43 passes through the cover 44 into the bridge 45. A disk 46 fixed to the wheel 42 has its upper face divided by radial lines, the latter being numbered. By turning the button 47, Fig. 5, which is fixed to the axle 43, in the direction of rotation of the wheel 42, a cam 48 is caused to abut on the ratchet attached to the wheel 42 and thus rotates it. A sliding pin 50 can be slipped into a groove in the button 47 and the axle 43 arrested at the zero position of the disk 46. A ratchet-wheel 51 is fixed to a sleeve which is free on the axle 43 and also passes through the cap 44 ; a button 52 is attached to the sleeve. A disk 53 is fixed above the wheel 51 and is graduated. The ratchet 55 is fixed to the wheel 42 and engages the teeth of the wheel 51, the spring 57 keeping it in gear ; the wheels 51 and 42 thus have the same motion. By turning the button 52, however, the wheel 51 can be given an independent motion. On the disk 53 is placed a bright mark to give warning just before the liquid is exhausted.