Patents Assigned to Neptune Water Meter Company
  • Patent number: 4674113
    Abstract: There is disclosed a system for reading a meter, e.g., a utility meter, over a telephone line. The system includes circuitry for detecting when an input signal within a predetermined frequency range is present. The input signal is fed to two timing devices. One of the timing devices is set to produce a constant output when the input frequency is above the higher limit of the predetermined frequency range. The other device is set to produce a constant output when the frequency is above the lower limit of the same range. The outputs of both timing devices are connected to logic circuitry. The two timing devices are connected to the telephone line. When a signal in the selected frequency range is received from the telephone exchange, the frequency detector acknowledges to the exchange the receipt of that signal, and activates a recorder in a meter reading apparatus at the subscriber's location to transmit the recorded reading of the meter over the telephone line to the exchange, where it is suitably recorded.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: June 16, 1987
    Assignee: Neptune Water Meter Company
    Inventors: William J. Brennan, Jr., Charles A. Cottle
  • Patent number: 4437344
    Abstract: This compound flow meter includes a high capacity meter and a low capacity meter connected in parallel with it. The flow through the high capacity meter is controlled by a main valve subject to the pressure difference across the meter and biased closed by a spring. The flow through the low capacity meter is controlled by an auxiliary valve. Mounted on the main valve is a means responsive to the pressure difference across it and moving in the same direction as the main valve in response to that pressure difference. That pressure difference responsive means operates a piston which is aligned with the auxiliary valve, so that the operation of the auxiliary valve is determined by the sum of the movements of the main valve and the pressure difference responsive means.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: March 20, 1984
    Assignee: Neptune Water Meter Company
    Inventor: William G. Karjalainen
  • Patent number: 4429571
    Abstract: A compound liquid flow meter comprised of a main flow path incorporating a turbine meter (2,36) and a downstream valve (3,24), and a parallel auxiliary low flow path incorporating a relatively small capacity meter (8,41) and a fixed orifice (16,53) discharging into the main flow path downstream of the valve. The orifice size is selected to cooperate with the diameter and spring characteristics of the valve so that on increasing flow rates the valve begins to open at 45 to 55 percent of the capacity of the low flow meter (8,41) and on decreasing flow begins to close at the same flow rate. The valve action is smooth and does not require, or create, pressure impulses or surges. Furthermore, the balanced relationship between the orifice and the valve virtually eliminates the traditional loss of accuracy associated with the "change over" of prior art compound meters.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: February 7, 1984
    Assignee: Neptune Water Meter Company
    Inventors: Donald J. Kullmann, William G. Karjalainen, Rodney G. Harris
  • Patent number: 4085287
    Abstract: This data transmitting apparatus is illustrated in a system for the remote reading of water meters. It includes a passive transmitter operated by the meter, a receiver including a source of energy, and means for connecting the receiver and its energy source to the transmitter. The receiver includes electrical loading means enabling it to read a submerged meter. The receiver is compatible with one type of transmitter having 14 output wires and with another type having only three. The data, e.g., a reading of a meter, is transmitted as binary data in a word of 16 characters, each comprising four bits. A pulse coding system is insensitive to noise, and includes a first bit detector for each character, and a final character detector for each word. The receiver detects open circuits in the transmitter and produces an error signal in response to such open circuits. The receiver and transmitter may be coupled through a manual connector.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: April 18, 1978
    Assignee: Neptune Water Meter Company
    Inventors: Donald J. Kullmann, Daniel A. Seltzer, Raymond L. Kirby