DE299862C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

, - M 299862 '■ CLASS 21 e. GROUP

LANDIS & GYR A.-G. in ZUG, Switzerland.

Apparatuses are already known for monitoring electrical power consumption become, in which after a certain period of daily or monthly Power consumption - this was automatically interrupted or limited.

The subject matter of the present invention. is a device for automatic monitoring an electrical power consumption,

consisting of one in at least two parts as Overload switch acting switch, which then the circuit at. too big ■ current intensity interrupts, a measuring device, which at least during the current moment

¹ S would be running, and a prepayment device. The devices are expediently built into a common housing, which simplifies their assembly and connection during installation. ".

The construction of the circuit breaker is of no concern to the present invention. For example, it can be one based on the electromagnetic principle, or one that in which the current interruption by heating certain windings or other metal body is effected, can be used. It is useful to have one of Hand-operated device for changing the current strength at which the over- - 30 load switch interrupts, so to arrange, that the same can be operated without removing the housing of the apparatus.

The measuring device can be, for example, an electricity meter or a time measuring device, the special construction of which for the present invention application is also irrelevant. .

The electricity meter can, for example, be built for direct, alternating or three-phase current and register either ¹ ampere-hour or watt-hour according to the single or any multiple tariff. The timepiece can e.g. B. a ^; Clockwork with pendulum or lever escapement that is wound by hand or electrically. The design thereof can be, for example ^ ⁴ so as to cause at certain times of a circuit (timer), namely by mechanical or electrical means. . .

The construction of the already mentioned Prepaid device is also available irrelevant. For example, a device can be used as described in US Pat Swiss patent specification No. 65633 is described .. ■ ·. ■ '■.

The following is the operation of various combinations of apparatus in accordance with of the present invention. 'The first example with an electricity meter shows The figure. '

The winding of the electricity meter α can be placed in series with the overload switch b , so that the meter registers the consumption while the overload switch

Claims (2)

it prevents the withdrawn power from exceeding a certain permissible size. The prepayment device c acts so that the switch b only then closes. interruption begins when a certain, prepaid amount of energy has been used up. This is achieved in that after inserting a coin / a differential mechanism d is moved by hand by means of one or more intermediate gears in the direction of the arrow, when electrical energy is consumed by the counter in the opposite direction until it has returned to its initial position; At this moment, a part of it pushes against J5 the lever of a contact e and opens the same and thereby also a previously short-circuited winding of switch b, so that it now periodically interrupts the main circuit if the permissible power consumption is exceeded. A mechanical lock of the switch can also be canceled. The switch can, but also from the start, act as an overload switch, and the arrangement can be made so that after the prepaid amount of energy has been consumed, for example, a second winding of the overload switch comes into operation in the sense that it is activated. Points in time at the overload switch at a lower current than before, or even at. the smallest occurring current strength interrupts. Further examples with a timing device can be such that the current strength, at 35 .- 'which the overload switch interrupts, is changed depending on: the time of day. For example, a winding or another part of the overload switch can be influenced mechanically or electrically by a clock mechanism in the evening hours in such a way that only a lower current level can be drawn during this evening time. Finally, an embodiment with a timing device should be mentioned in which the current intensity is not limited as a function of the duration of the energy extraction, but as a function of the time of the month. Such a device is z. B. designed so that a clockwork carries out a circuit only once every month and through this sets the overload switch to a small or the smallest occurring current. This facility will then be chosen, 'if the electrical energy is delivered at a flat rate against a monthly payment of a certain amount; the overload switch of the device prevents the permissible amperage from being exceeded, and. Once a month ~ e ° the overload switch is set by the clockwork to such a small current strength that a usable current can no longer be drawn; the consumer is therefore forced to insert the lump sum into the advance payment device, whereupon normal electricity consumption from the network becomes possible again. Sponsorship τ claims: 1. Device for automatic monitoring an electrical power consumption, consisting of an at least temporarily acting as an 'overload switch Switch, which then interrupts the circuit when the current is too high, a measuring device, which at least while the electricity is being drawn, and a prepayment device, characterized in that the current intensity at which the overload switch interrupts, from the measuring device, depending on a certain amount of energy or changed by the time of day or month. 2. Device according to claim i,. characterized in that the start of work of the overload switch is set to greater power or current strength by actuation of the prepayment device. For this purpose ι sheet of drawings.