HCP (1928 to 1934) Up
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This is the earliest prepayment model known made by Sangamo. The case of this meter is of cast aluminum, and the meter element is the same as used in the HC singlephase meter. Like some other prepayment meters, this meter took quarters, and by subsituting the appropriate gear, this meter could charge between 3 and 15 cents per kwh. The upper three dials indicated the amount of money inserted, the middle dial showed the number of kwh purchased but unused, and the last set of dials is a special kilowatthour register, the gear of what would be the fastest dial (blank on US version, test dial on Canadian version) driving the prepayment counter. When the coin was inserted, the knob was turned until a bell rang, and a switch would complete the circuit through the meter. When the credit ran out, the switch would be opened, breaking the circuit and leaving the customer in the dark until he could come up with more quarters. HCP Prepayment
Joe Maurath Jr. collection