DE1862864U - MULTIPLE SPRING SWITCH. - Google Patents

Description

RArB 115 5 Ι G -17. ia-3i

Claus-Holmer Gr e r d e s, Lüneburg

Multiple spring switch

The innovation relates to electrical switches directions with several actuation functions. Such devices are already known from the prior art. In particular, it is known electrical devices through several individual switching elements, the various actuation functions are assigned to control. However, these known means are inherently deficient, which can be seen in assembly and wiring and make operation noticeable and increase sources of error and production costs.

With the new electric multiple spring switch these disadvantages are eliminated by the fact that the operating functions of the switch, for example from pressure and temperature temperature changes of a flowing liquid are derived, act on a common electrical switching element.

The progress is made through the novel design

such

mo P mm

such facilities achieved as they are on hand of one Preferred example shown in Figures 1-6 and described in more detail below.

Pig. 1 shows the base plate as a top view, I ¹ Ig. 2 is a bottom view of the base plate, FIG. 3 shows the switching bridge as a top view, Pig. 4 is a plan view of the contact bridge, Mg. 5 is a side view of the multiple spring switch in a schematically simplified representation, enlarged, Mg. 6 shows a plunger with plunger guide and sealing cap, installed, in section, enlarged.

A base plate (1) is preferably on its underside (2) just executed and can thereby possibly with the interposition of a seal (3) with the here not connected device whose functions are to be controlled. The bottom (2) of said The base plate (l) has, in addition to the fixing holes (4) a bore (5) for the implementation of a plunger (6), for example from a differential pressure membrane, not shown here is moved. Furthermore, a recess (7) is made in the base plate (1), which has a thermal bimetallic strip (8), which is bathed in a heated liquid. The thermal bimetallic strip (8) is on his one end through a screw (9) in the recess (7)

the

attached to the base plate (l). Is across its other end The base plate (1) is provided with a hole (5) through which a plunger (6) is guided in a sealed manner.

The base plate (l) also has two bores (10) Two stud bolts (ll) that form a contact bridge

(12) wear. There are clamping screws on this clamping bridge (12)

(13) to define the electrical lines (14) of the respectively closed by this switch. interrupted Circuits attached. To simplify matters, the stud bolt screw connections (15) on the contact bridge (12) can also be used Establishing current-carrying lines (14) can be used. From the clamping screws (15) lead flexible, insulated, electrical Lines (14) to contacts (16) which are connected by springs (17) to a common switching bridge (18). The springs (17) can be regulated by adjusting screws (19) in order to be able to use the resilient Support on opposite contacts (20) on the base plate (l)

ff

ensure that the circuits are closed and opened at the same time.

The live parts on the switching bridge (18) such as contacts (16) and adjusting screws (19) of the springs (17) are protected from each other by webs (21) firmly connected to the switching bridge against flashover in a humid atmosphere. Likewise are the fly contacts (20) with the clamping screws (13), from which the electrical circuits are forwarded are guided by webs (21) on the base plate (l)

between

between said contacts (16) and adjusting screws (19) seated, secured against rollover.

The switching bridge (18) can be pivoted in a hinge (22) on the side opposite the clamping screws (13) stored. Behind the row of contacts (16) are the ends of two tension springs (17) on the outside of the switching bridge (18) attached, which are connected at their other free end by a web (23).

Firmly connected to this web (23) is a metal tongue (24) f which connects the web at the level of the Sehaltbrücke (18) with the base plate (1). One end of a leaf spring (25) is firmly connected to the contact bridge (12), the other end of which rests on the metal tongue (24) with a load on the standing side. The pressure of this leaf spring (25) can be adjusted by means of an adjusting screw (27) provided between this support and the fastening of this leather in a bore (26) in the contact bridge (12) ) oscillating switching bridge system can be adjusted. A plunger (6) is guided through the bore (5) in the base plate (1), which rests against the metal tongue (24) from below and is actuated by the pressure function transmitter, for example the diaphragm (not shown).

A thread-adjustable counterpart (28) to the is located on the switching bridge (18) in series with the contacts (16)

from

plunger (6) actuated by the thermal bimetallic strip (8), so that the transmission of the control movement of this puncture can also be precisely adjusted. In the entirety of this institution is one of several control functions operated Switch combination created according to the invention, their individual Control pulses can be set precisely to certain predetermined values, whereby the intended sequence the actuation, opening and bottom closing of the intended circuits is guaranteed.

The contact of a control or signal lamp can be actuated at the same time from the contacts carrying operating current will. The establishment of the contact for this signal lamp can also be made so that the circuit for the lamp is closed when the operating circuit is to be interrupted, for example by the fact that the transmission elements of the puncture transducers come into contact with one another.

The electrical connection between the contacts and the terminals is made by flexible wires (37), which connect the individual terminals on the contact bridge (12) with the contacts (16) on the switching bridge (18).

The sealing implementation (Pig. 6) of the actuating plunger (6) both the pressure differential diaphragm, not shown, as well as the Thermal bimetallic strip (8) is preferably designed so that the S = feeeeei end (29) of the plunger (6) on the contact side has a plate-shaped collar (30), the edge of which

rounded

is rounded. This plate-shaped collar of the ram is encompassed by a sealing cap (32) which is fixed at its open edge with a bead (33) from the screwed-in ram guide (34) against the base plate (1). Beyond the collar (30), the plunger (6) is continued by a threaded end (35) which penetrates the sealing cap (32) and receives a nut (36) which holds the flexible
Sealing cap (32) also fastened in a sealing manner against the plunger (6).

The free end of the plunger (6) is rounded to one
uniform contact with the support respectively on the switching bridge (18). on the metal tongue (24) of the differential pressure actuation.

This design of the plunger and the sealing cap results in a comparison with the previously known prior art
Particularly short transmission element for pulse generators while maintaining the smallest diameter.

Protection claims

Claims (3)

FArS115 51G-111 π. W - 7 · - Protection claims 1. Multiple spring switch, especially for controlling pressureless instantaneous water heaters for flowing liquids with contacts operated by adjustable snap springs, on which various pulse generators act, one of which is a Overload protection is formed by thermal bimetallic strips, characterized in that the change in the Pressure state of a flowing liquid via an easily movable, sealed actuating element (6) and the Change in temperature of the flowing liquid due to a thermal bimetallic strip (8) in the liquid flow Via a second similar actuating element (6a) to a rocker arm (18) mounted on one side, on which the Gate tension of several mutually supporting tension and leaf springs (17, 24, 25) acts, and at their free end carries several resilient, individually adjustable switching contacts (16), have a switching-off effect by all Contacts of multi-phase circuits and especially signal contacts simultaneously under the action of the snap springs (17) are lifted from their mating contacts (20). 2. Multiple spring switch according to claim 1, characterized in that a snap spring designed as a tension spring (17) engages the Sehaltschwinge (18) and with her free end is supported by a leaf spring (24) hinged to the base plate (1), on which the actuation s- » element element (6) of a pulse generator engages switching, while this leaf spring (24) through the free end of a second Leaf spring (25) is supported with adjustable bias, which is attached to a by stud bolt (ll) with the base plate (l) the contact bridge (12) connected to the switch is adjustable » 3. Multiple spring switch according to claim 1-2, characterized characterized in that the actuating elements (6, 6a) of the pulse generator as covered by perforated sealing caps (32) Plungers are formed, with the sealing caps (32) reinforced at their inner and outer edges both with the tappets (6, 6a) and in the recesses (5, 5a) of the base plate (1) are tightly connected, and the fastening means (34) for the outer edge of the sealing cap (32) at the same time form the guides for the plungers (6, 6a). 4 · Multiple spring switch according to claims 1-3, characterized marked that the live '•' - 'cables and contacts of the individual current phases through insulating intermediate webs (21) from one another and to the outside against electrical flashovers are secured. 5 »Multiple spring switch according to claims 1-4, characterized characterized in that signal contacts to display the operating state in the circuit of one or more phases of the through the switching contacts (16) controlled operating current are arranged.