Patent GB-191200249-A (GB)
Title: Improvements in or relating to Recording Mechanism for Meters or like Apparatus.
Inventor: HALL CHESTER IRVING
IPC: G01R11/56
Filed: 1912-01-03
Granted: 1912-11-14
Abstract: 249. Hall, C. I. Jan. 3, 1911, [Convention date]. Electric clocks. - In recording-apparatus for electric watt-meters &c., a clock transmits currents periodically to a device which, in addition to recording the readings of the meter &c., also serves as a time-indicator. A record is made, as shown diagrammatically in Fig. 1, by actuating a platen 21 of an electro-magnet 20<a>, which is energized when the clock-controlled contacts 27, 28 close the relay circuit of the electromagnet. As shown in Fig. 3, the contacts are formed by double-involute disks 37, 38 of metal and insulating-material respectively, which are driven by suitable gearing from the minutehand spindle of the clock. Contact-levers 41, 42 are mounted on an insulatingblock 40 and have projections at right-angles tending to engage the disks 37, 38. These parts are so adjusted that the contact 41 drops off the tip of the metal disk in advance of the contact 42 in order to prevent sparking. The upper end of the contact-lever 42 is provided with an insulating roller 43<1>, which engages an arm of a bell-crank 43, the other arm of which has a cam 44 thereon adapted to be engaged in succession by pins on the face of a wheel 45. The wheel 45 gears with a pinion 48 to rotate the involute disks with a velocity ratio of 6 to 1; thus, if the twelve pins are in position, the circuit through the contacts 41, 42 will be closed to give a record every five minutes, if every alternate pin is removed the circuit will be closed every ten minutes, and so on. The circuit which is completed through a relay magnet 26 and contacts 23, 24, 25 thereby energizes an electromagnet 60, Fig. 7, the platen of which is pushed sharply upwards to make an impression. At the same time a pawl on a lever pivoted at 67 moves over the teeth of a ratchet-wheel and on the return of the platen advances this wheel to feed the record strip forward. The platen is guided by a pin which engages a slot 69 in the front plate and serves as a means for rocking a lever 72, which has a pawl 75 engaging the ratchet-teeth of a pin-wheel 76 gearing with a star-wheel 78 adapted to rotate a time typewheel 81. The number of pins of the wheel 76 depend on how many times the platen 60 is to be actuated in an hour. The spindle on which the time type-wheel is mounted is provided with a pointer 84 to indicate the position of this wheel and roughly indicate the time of the day. The Specification as open to inspection under Section 91 (3) (a) comprises also a modified recording-mechanism and a transmitting-device in which a clock periodically releases an auxiliary train of wheels adapted to make and break a circuit controlling the periodic operation of the recording-mechanism. The energization of the electro - magnet shown in Fig. 1 (Cancelled) actuates a pawl to rotate a shaft 52 to which is secured a pin-wheel 65, which engages a starwheel 67 adapted through a pinion 69 to rotate a pinion 70 secured to the printing-wheel 71, which gives an indication of the number of the record made. A pointer 74 moving over a fixed index 75 gives the number of the next meter reading to be recorded. The contact-mechanism which is controlled by the clock-work comprises a conductive disk or segment 135 and an insulating-segment 136 on a spindle 139, Fig. 12 (Cancelled), adapted to be rotated when a pin on one of the wheels is released from a lever controlled by a ratchet-wheel on the minutespindle of the clock. The ratchet - wheel 157 rocks the lever 154 and thereby through an arm 150 disengages the end of a latch or detent 146' from a disk on the spindle 139. Further movement of the lever 154 moves its end 153 away from the pin 152, which is then free to allow the wheels and segments to rotate until arrested by the detent 146<1>, the circuit being completed through the arms 137, 138. Means are also described for effecting a quick action when completing the circuit through the involute disks when these are driven directly by the clock, as shown in Fig. 3 (Cancelled), and comprises a solenoid 119, Fig. 10 (Cancelled), provided with a core having an arm 120 extending in the path of pins on the wheel-driven disk 121 so that, when the circuit is completed and the solenoid energized, the arm 120 rotates the disk 121 and thereby breaks the circuit. The amount of rotation is about 90 degrees, and this is taken up by back-lash in the gearing. The rapidity of operation of the solenoid 119 may be increased or decreased by short-circuiting, less or more, the coils of the solenoid. This subjectmatter does not appear in the Specification as accepted.