DE446981C - Device for the generation and transmission of occasional or periodically required tone-frequency alternating currents of different frequencies via lines, in particular power lines, for operating resonance devices of all kinds, in particular electrical slave clocks - Google Patents

Description

If in a line network, especially for the operation of slave clocks, resonance relays or resonance transmission by means of superimposed audio-frequency alternating current impulses for response are to be brought, these superimposed currents must be generated in the control center and pushed onto the net. It would be obvious to do this for each of the required Sound frequencies a special one, with

to provide a generator running at a constant number of revolutions and to connect it inductively or capacitively to the mains if necessary by hand or by a switchgear. Apart from the inefficiency of such a system, expensive regulating devices are required in _{order to maintain the speed which is accurate to at least 1 ° / 00.}

This is avoided by according to the invention for all or one as possible large group of the required individual frequencies provides a common generator and its speed varied by conventional means in such a way that the frequency of the generated audio frequencies Alternating current oscillates between two arbitrarily adjustable end values, whereby one also, for example, by corresponding Dimensioning of the rotor inertia which is proportional to the rotor acceleration Change in frequency can get any size.

Furthermore, according to the invention, this is generated from this by oscillating the generator Frequency band for operating the resonance relays and gears installed in the network required individual frequencies by means of resonance switching relays matched to the same periodic or aperiodic contacts are hot sifted out and superimposed.

Are certain frequencies required periodically at certain intervals, for example

wise to operate electrical slave clocks - so one leaves the generator in its frequency band these frequencies are included, commute in just these intervals, for example for example by opening a speed controller periodically with a normal clock and closes or by, as for example with direct current, the speed by from the Normal clock via a switching relay caused ίο field weakening increases until a the desired maximum frequency tuned resonance relay responds, the switching relay switches off and thereby restores the original field strength.

To prevent the frequency from dropping when the power is switched on, the Audio frequency generator during the shutdown of the network on an artificial consumer let work.

Since relays with aperiodic contact have a short time between response and need to make contact, it may be advantageous to pre-set them, so that they respond at an earlier frequency and therefore because of their inertia make contact only at the correct frequency.

The frequency band generated and screened in this way is now pressed inductively or capacitively onto the network.

Fig. Ι shows the circuits for a direct current three-wire network, at A simply via the transformer T to the outer conductor taken in parallel, at B with magnetic counter-connection of the two coil halves of the transformer for the mains current, at C an overlay over the neutral conductor, at D for the purpose Keeping the direct current from T over the mains rails made inductive by a peeled iron jacket M , at E by superimposing the excitation current. R is an installed resonance organ. Fig. 2 shows a three-phase network with three separate transmission transformers T _x , T ₂ , T $ and at R a resonance element with magnetic cancellation of the three-phase effect on the resonance spring F.

Patent claims:

i. Device for the generation and transmission of occasionally or periodically required audio-frequency alternating currents of different frequencies via lines, especially power lines, for operation of all kinds of resonance organs, in particular electrical slave clocks, thereby characterized in that all or as large a number as possible of the required alternating current frequencies from a common Generator is generated, the generated frequency is varied by known means so that it a required Frequencies comprehensive frequency band of adjustable width generated, its subdivision into the individual frequencies and their optional overlay on the network, if necessary by special frequencies that are tailored to the required individual frequencies Resonance relay can be done.

2. Device according to claim 1, characterized in that the change the frequency is generated periodically by a clockwork by changing the frequency via a switching relay for so long until one tuned to the desired maximum or minimum generated frequency Resonance relay responds and restores the original frequency.

3. Device according to claim 1, wherein the resonance switching relays accordingly their inertia can be pre-tuned to an earlier frequency.

4. Device according to claim 1 to 3,

flnrrH arrangement - one.

artificial consumer on which the generator works when the grid is switched off.

5. Device according to Claims 1 to 4, characterized in that in the case of direct current three-wire networks and three-wire networks the superposition takes place in a transformer-like manner via the outer conductors taken in parallel.

6. Device according to claim 5, characterized by division of the direct current flowing through Coil of the superimposed transformer and magnetic counter circuit, same for the mains direct current.

7. Device according to claim 1 to 4, characterized 'by superimposing over the 'neutral conductor.

8. Device according to claim 1 to 7, characterized 'by interposition a choke coil in parallel with the transmission transformer, especially when using the net rails themselves, made inductive by a peeled iron jacket.

9. Device according to claim 1 to 3, no 'characterized by overlaying the excitation current.

For this purpose ι sheet of drawings.

Claims (1)

Supplementary sheet
to patent specification 446 981 class 83 b group 2. By a legally binding decision of the Reich Patent Office on April 20, 1933, in claim 1, after the words: ^Ir, "the words" were inserted "in clockwise oscillation" by known means.