DE447416C - Switching device for an electric fuel delivery device - Google Patents

Description

GERMAN EMPIRE

ISSUE JULY 28, 927

REICH PATENT OFFICE

PATENT LETTERING

JVr 447416 CLASS 21c GROUP 35

N 24580 Vm \ 2ic ^% Date of publication of the patent grant: July 7 , 192J.

Dr. August Nagel in Stuttgart. Switching device for an electric fuel delivery device.

Addendum to patent 427,688.

Patented in the German Empire on May 19, 1925. The main patent started on August 27, 1924.

From the patent 427 688 it is known the activity of an electrically acting Cancel the fuel feed pump as soon as a storage tank connected to this pump, to which the pump supplies the liquid, the latter reaching a maximum level

Has. This was caused by a mechanical lock, which is located in the storage container provided float is operated, in front of the circuit switch of the pump solenoid circuits put and canceled its effectiveness.

To this acquaintance, the invention shows something new to the extent that besides the mechanical switch lock the shutdown of the pump by an electrical Switch is installed between the solenoid circuits and by lever linkage is operated by the float of the storage tank, so that when the liquid is at its highest level, the interruption occurs when the level is low ίο but the triggering of the mechanical lock and at the same time the closure of one of the circuits of the solenoids takes place.

Resistance windings are built into the solenoid circuit lines, which cause the spark extinction when the circuits are opened.

In order to achieve this, the redesign described in more detail below is created has been, which is shown schematically in one embodiment.

As the illustration shows, in the storage container / ·, the one with the Pnmpraum s through Liquid feed lines, not shown, are connected to the liquid at its maximum level reached and the pump has stopped.

The following explains how the recovery of the. Pump takes place.

According to the inflow of the liquid from the storage container r to the carburetor, which is not shown, the liquid level in the container and thus the float in the latter falls. The rod h with its loop h ¹ also slides downwards with the float. After the latter has been idle, the end of the loop h ^% rests against the pin i of a lever arm i ^{1 which} , together with further lever arms i ² i ^s, forms a three-armed lever which can be pivoted ^{about an axis / 4.} One of these lever arms, i ² , is connected to a lever k articulated to it at i ⁵ . At its end opposite the hinge connection i ^5, this has a loop k \ in which a pin of a switch lever ¹ is guided, which is pivotable about e ² at one end and carries ^{a contact e 3 at its other end.} The bearing point e ² is connected to contacts cc ¹ by power lines bb ¹ , each with a bifilar resistance dd ^{1 installed} , from where lines δ ² δ ³ lead to solenoid windings aa ¹ , which are placed around a pump housing s ¹ in a known manner. Swiveling armature levers tt ^{1 are} mounted on this pump housing at s ² s ^3. These are connected to one another by a linkage P which has a link t ^z by means of which a switch lever assigned to the contacts cc ¹ / by means of a lever arm f ^{1 is} controlled. ^{This or an arm / 2 that} is aligned with it and is also connected to the switch lever / is encompassed at its end / ³ by a part ⁶ as soon as the maximum level of the liquid in the reservoir / 'is reached, as the illustration shows, the switch arm / also being is under the tension of the spring I , which is located between two pins I ¹ arranged on the linkage f ² , while the outer end of the switch arm f ^{1 has been placed} in front of the backdrop ^ ³ in a blocking manner by means of pin / ^4. Then the contact / ^{5 is} in the middle position to the contacts ^{cc 1} without any effect.

As far as the contact lever ^{1 is} concerned, it is in the open position to contact c ⁵ , from which the lines ö ⁴ ö ^{5 lead} via the bearing point / ^{6 of} the switch / to ground.

The mode of operation of the invention is as follows:

After, as already mentioned, as a result of the outflow of fuel from the storage container r to the carburetor (not shown) the float g · sinks in the storage container / ·, the rod h and the loop h ¹ arranged on it move downwards with it. The loop end part h ² presses to a certain extent. Idle to the pin i on this and causes the pivoting of the lever arm i ¹ . At the same time, the lever arm i ³ also swivels, as a result of which the TeEi ⁶ releases the end / ^{3 of} the switch ^{lever arm / 2.} This gives the leaf spring I the opportunity to move from its tensioned position into the extended position, and presses the contact / ^{5 located} on the switch lever / onto the contact ¹ (see dot-dash position). The pin / ⁴ switches itself on by pivoting its support arm Z ¹ to the lower sliding surface of the link t ³ , so it releases the path for reversal, the use and effect of which will be explained later.

Since the lever arm i ^{s has also} pivoted with the lever arms I ¹ i ^{3 , the lever 1} through the loop end located next to the bearing point i ⁵ * is due to a certain idling of the pin test from the switch ^{lever e 1} in the loop k ^{1 of} the lever k has been pivoted about the bearing points ² so far that the contact ³ comes into contact with the contact ^3. Thus, the circuit circuit of power source m above solenoid coil a ^1, contact c ^1/5, parts ff ⁶ to the mass, but also simultaneously by the contacts ¹ on Brfilarwickluojg (P-, parts e ^{x 2} e e ^3, contact c ³ via δ ⁴ δ ^{5 completed} to mass.

As a result of the excitation of the solenoid coil a ¹ , the piston ti moves in the pump chamber s ¹ to the end wall s ^{4 of} the pump, and the armature lever t ¹ , which is ^{pivotably supported at s 3} , is drawn towards the end wall s ⁴ in a known manner. The leaf spring L is

Shifting of the linkage t - and thus the effect of the pins / ¹ on the leaf spring end under tension, because the pin / ¹ , on the lower surface of the link *! ³ sliding along, the entrainment of the switching lever arm / and thus also the detachment of the contacts c ¹ / · "'prevented from each other until part / ⁴ leaves its sliding surface and switches to the upper surface of the link.

ίο If this is the case, the last-mentioned contacts are torn off, which takes place without sparks, since the bi-fold winding! ^{1 is turned on} in the circuit. Part / ^s comes into contact with contact c by stretching the leaf spring /, so that the other circuits belonging to the pump solenoid α are closed. This interaction continues until the liquid in the storage container r has reached its maximum level. Then the pump comes to a standstill, which is achieved by the fact that after the pin i is idling in the loop h ^x while the liquid is flowing to the reservoir r , the loop part Iß presses against i and the three-armed lever i ¹ i ² i ³ pivoted. Lever k pulls on switching lever arm e ¹ and interrupts contact e ³ c ³ . At the same time turns part? ⁶ in the path of movement of the lever / ³ = and secures the switching lever / and thus the contact / ⁵ in the middle position to the contacts cc ¹ by placing the part z "over the lever arm end / ³ .

The above-described device stops the pump by interrupting the circuit from the power source to the ground, not only the one leading directly via the shift lever / to the ground, but also the one belonging to one of the contacts c c ¹ , which also includes a bifilar winding Circuit, completed.

In terms of effect, it does not matter whether a bifilar winding is used for the purpose of spark extinction at the break contacts of a winding containing self-induction (magnet or working winding) directly to this is connected in parallel or in parallel with the interruption contacts.

However, the latter circuit has the advantage that the one flowing through the bifilar winding Current is not drawn from the power source at the same time as the working current and therefore not, as it is with. Parallel connection to the working winding is the case when to the working current additional current from the contacts with being interrupted needs.

Claims (2)

Patent claims: 1. Switching device for an electric fuel conveyor, etc. device according to Patent 427688, characterized in that two switching devices of one Place by means of a float that works in the storage tank and that works together with it Lever mechanism simultaneously interrupts the circuit for the working coil of the fuel delivery device (Pump) as well as the circuit associated with the spark extinction, including a bifilar coil. 2. Schaltvoirichtung according to claim 1, characterized in that a three-armed lever {p P- i ^z ) is actuated by a control member (A ¹ ) connected to the float (g ) so that after a certain idling it has one arm (i ³ ) locks the lever (/) that switches on the work coils in its central position between its two counter-contacts (cc ¹ ) after it has switched off the switch (e ¹ ) that monitors the spark extinguishing circuit with its second arm (i ^{2) after a certain idling, while} the three-armed lever (1 ¹ I ² P) as a result of the opposite movement (rising) of the float, after a certain idle state, releases the lock of the switch (/) for the work coils and closes the switch of the spark extinguishing circuit. 1 sheet of drawings.