EP0064034A2 - Electro-mechanical regulating device for gas ranges through the agency of a control keypanel - Google Patents

Abstract

The shaft of each tap carries four radial arms and three cams also spaced at 90 deg. but in different planes co-operating with respective switches. Three keys for each tap corresponds to full-on, half-on and off settings. As the rail reciprocates, two pegs are projected forward by a small square when an electromagnet is energised by an arm closing switch contacts at the respective ends of its travel. The pegs engage the tap arms to effect rotation in 90 deg. steps in accordance with the key positions. The motor which drives a crank causing the reciprocating motion is switched so that the rail comes to rest always in the same position, irrespective of the switching instant of each cam-operated switch.

Description

The present patent application for an industrial invention relates to an electromechanical device for adjusting the gas stove lights, an adjustment which, until now, is obtained by manual intervention, ie by turning the knob of the gas taps.

The object of the present invention is to design a mechanism which makes it possible to execute said operation, simply by intervening on certain keys of a pulsating control panel.

The invention proposes to create a mechanism, the realization of which is simple and economical, constructed by means of common materials and easy to find on the market, extremely functional and safe.

The invention also proposes to create a mechanism which can be automated thanks to the use of a timer (or automatic time clocks).

In order to provide the reader with maximum explanatory precision, the description of the invention will continue with reference to the appended drawings, presented solely for explanatory and nonlimiting purposes, of which FIG. 1 is the schematic representation of the device according to the invention, which also shows the electrical diagram corresponding to only one of the three supposed taps.

With reference to the above figure, on the control rod (1) of each tap are applied four small radial arms (2), spaced at an angle of 90 ° and distributed in such a way that, when the tap is closed, they form a "X".

Externally to the rod (1), on three distinct circumferences, three cams (3a), (3b) and (3c) are provided, which are also spaced 90 ° apart, and whose interference with a suitable corresponding contact , placed on the rod (1), determines the stop of the tap either in position "open at low heat" (F / 2), "open at high heat" (F), "off" (C), ( respective positions).

The above arms (2), all placed on the same vertical plane, orthogonal to the axis of the rod (1), can be retained by a pair of horizontal piles (4) and (5), expelled on command of the edge of a horizontal rail (6), endowed with a reciprocating translatory motion thanks to a "guide Fairbain" including a slide (7) carried on the hinge pivot (0) and ^r the end (B ) of the rail (6).

• - une première course vers la gauche;
• - une seconde course vers la droite, double par rapport à la première;
• - une troisième course vers la gauche et égale à la première.

According to the invention in question, the slide (7) begins its alternating oscillations always starting from the intermediate vertical position, so that at each revolution of the crank (6), assuming a counterclockwise rotation of the said crank, we will get, in gold,

• - a first race to the left;
• - a second race to the right, double compared to the first;
• - a third race to the left and equal to the first.

When the slide (7) is in the stopped position, the above-mentioned pair of piles is astride the longitudinal plane of symmetry of each valve, in the intermediate position between the arms (2).

The output of the piles (4) and (5) is obtained by dominating the counter ste action of two springs, by means of the impulse of a small square (8), which, recalled at the right time by an electromagnet (9) brings the piles (4) and (5) out of the rail (6), enough to be placed next to the arm (2) which at this instant is located opposite the piles. A wind vane (10) projects from the rail (6) below, and at the end of the first and second stroke of the pivot (6) this causes re spectively the closure of a pair of switches (11) and ( 12), which is followed under certain conditions by the excitation of the electromagnet (9), which by attracting the square (8) causes the exit of the pair of feet (4) and (5).

It is obvious that as soon as the aforementioned piles have been expelled, one of them, continuing the course of the rail (6), inevitably intercepts and then pushes the small arm (2) placed side by side, by turning the rod (1) 90 °.

The attachment and the dragging described will take place in the same way until the rod (1) has reached the desired angle, since, only when it has reached the desired position, one of the three cams (3a) and (3c) by interference with the corresponding contact will act so that the small electric motor (M) is without current.

In order to explain as clearly as possible, let us now examine the chronological order of the different phases of operations, assuming that the (F / 2) "small fire" button is pressed when the gas valve is turned on.

On the pulsating control panel, it is obvious that there is a group of keys (F) (F / 2) (C) for each tap and therefore in the most frequent case of three lights, the pulsating panel will present nine keys.

With reference to the electrical diagram shown in fig. 1 and corresponding to only one of the three supposed taps, we note that by pressing the key (F / 2) we send current to the electric motor (M) passing through the switch (13) momentarily closed and at the same time time by the switch (11) momentarily open.

The crank (C) begins its first turn, driven by the motor (M).

At the end of the first stroke of the rail (6), the wind vane (10) causes the closure of the switch (12) without causing any excitation of the coil (9) since the switch in question is without current.

At the end of the second stroke of the rail (6), the wind vane (10) closes the switch (11) which causes the excitation of the coil (9) of the corresponding valve, so that the square (8) attracted brings out the piles (4) and (5) which are placed side by side on the arm which is in front of them.

During the third stroke of the rail (6), the pile (5) intercepts and drags the arm (2) to which it remains attached by friction.

L ^t another pile (4) on the contrary, moves back, as soon as the thrust of the bracket (8) misses, ie when the reel (9) ceases to be excited by the gi rouette (10) accordingly to the contact opening (11).

The pile (5) on the contrary, only moves back after having turned the arm (2) by 90 °, as soon as the rail (6) at the end of its travel reverses its movement.

The acerochage-tranîement operation thus conceived continues to be repeated until the cam (3a), after two rotations of 90 ° of the rod (1) interferes with the corresponding switch (13a) by removing the current to the motor (M) and at the same time to the switch (11).

Despite this, the motor (M) continues to run because it is supplied directly by the network, with the interposition of a switch (14) which will be opened by the rail (6) only when the latter is in the starting position and cad when the slide will be perfectly vertical.

By this means, the rail (6) is always stopped in the same position, regardless of the instant at which the lack of current to the motor (M) will occur for the opening of one of the switches (13a ), (13b) and (13c).

• - un groupe d'interrupteurs (13a), (13b) et (13c) en-dessous de la tige;
• - une paire d'interrupteurs (11) et (12) sous la girouette (10);
• - une bobine (9) en-dessous de l'équerre (8);
• - un groupe de touches (F), (F/2), (C) sur le tableau pulsatoire de com mande.

To be more clear, it is explicitly noted that for each robi net it is planned:

• - a group of switches (13a), (13b) and (13c) below the rod;
• - a pair of switches (11) and (12) under the wind vane (10);
• - a coil (9) below the bracket (8);
• - a group of keys (F), (F / 2), (C) on the pulsating control panel.

It goes without saying that the pulsating control panel can be easily fitted with one or more automatic time clocks (timers) on which it is possible to set at will, the cooking times and methods so as to obtain a completely automatic setting of the lights.

Claims (4)

1) Electromechanical device for adjusting the gas stove fires by means of a pulsating control panel characterized by the fact of comprising: a) a horizontal rail endowed with an alternative translational movement thanks to a "fairbain guide"; b) four radial arms, coplanar to be carried over the rod of each valve; spaced 90 ° apart and distributed to form an "X". c) three cams to be transferred to the stem of each valve, also spaced 90 ° apart (direction of failure which opens the valve) but offset on three different circumferences; d) a group of switches for each tap, placed immediately under the stem of each tap, so that the three cams read above, following the rotation of the stem, can oppose and or screw the corresponding switch; e) a pair of closely spaced piles for each tap, threaded across the rail mentioned in point a), and held in this same rail by two return springs; f) a small square for each tap, placed behind the aforementioned rail and supported on a horizontal pivot, intended to give the impulse at the right time, to the pair of piles which are in front of it, these projecting frontally from the rail place in the radial arm which at this moment is in front of them; g) an electromagnet for each tap, intended to recall the above-mentioned bracket at the right time; h) a pair of switches for each tap, intended to energize the electromagnet mentioned in point g) at the right moment; i) a weather vane, fixed on the. aforementioned rail, which, at the end of the first and second stroke of the cited rail, causes the closing of the pairs of switches of which in the preceding point; 1) a pulsating control panel which has three keys for each tap, one of which opens the maximum fire, the second for half fire and the last to extinguish the fire. 2) Electromechanical device for adjusting the gas cooker lights by means of a pulsating control panel, according to the preceding claim, characterized in that the slide begins its alternating oscillations always from the vertical intermediate position, so that at each turn of the crank, assuming a counterclockwise rotation, we will have in order: - a first race to the left; - a second race to the right, double the first; - a third race to the left, equal to the first. 3) An electro-mechanical adjustment for gas stoves lights via a pulsating control panel, according to the preceding claims, characterized in that ^t pushing a key on the pulse command table, it sends current to the small electric motor, which drags in rotation, the handle of the "mistletoe of fairbain"; the current arrives at the motor by passing through one of the three switches of which in point d) of claim 1); actuation of the key sends, at the same time, the current to one of the two switches of which in point h) of claim 1). 4) Electromechanical device for adjusting the gas stove lights by means of a pulsating control panel, according to the preceding claims, characterized in that the small electric motor is supplied directly by the network, with the interposition a switch which is opened by the aforementioned rail only when it is in the starting position and ie when the slide is perfectly vertical.

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