DE1280963B - Electric switch with light indicator - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

HOIh

German class: 21c-40/07

Number: 1280 963

File number: P 12 80 963.1-34 (F 38004)

Filing date: October 10, 1962

Opening day: October 24, 1968

The invention relates to an electrical pressure switch, consisting of a cohesive, transparent or translucent housing with at least one hole for a fastening screw, a main opening in the front, a pair of contacts, a holder for a lamp in the housing and a push button slidable in the main opening Closing the contacts. Pressure switches with lighting effects are z. B. in the German utility model 1776 340, in German patent specification 1044 679, in German patent specification 834414 and described in French patent 1231548.

As a starting point, a pressure switch is to serve, which is from an older one from the applicant originating publication "Friedland Beils and Chimes" from March 1, 1957 is known and the Invention comes closest. This switch has the disadvantage that a large number of details is required, which are previously assembled in partial assemblies must before they can be installed in the actual housing. An inner gilding of the older switch requires additional work steps, but there is still a special black cover cap Made of cardboard between the lamp and the gold plating provided to keep the light in the housing shield.

The object of the invention, on the other hand, is to design a pressure scarf of the type mentioned so that that the number of components of the switch is reduced and that the components are machined can be mounted. This is intended to achieve a substantial saving in material and labor costs will. In addition, the light cover on the switch is to be solved in a simpler manner than before will.

The object is achieved in that the contacts and lamp holder with lamp and push button Are attached directly in the contiguous housing with one screw each. The like., and that a substantial part of the housing covering an opaque cap is so attached is that the light emanating from the lamp mounted in the housing with the exception of the through the cap of the covered part is visible.

This means that instead of 25, about 11 individual parts need to be used. Also the Light coverage is much simplified.

For better orientation, a »light ring« through the housing around the push button - electrical Switch with light indicator

Applicant:

V. & E. Friedland Limited,

Macclesfield, Cheshire (UK)

Representative:

Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann

and Dipl.-Phys. Dr. K. Fincke, patent attorneys,

8000 Munich 27, Möhlstr. 22nd

Named as inventor:

John Doggart, Macclesfield, Cheshire

(Great Britain)

Claimed priority:

Great Britain 11 October 1961 (36 563)

To let go, the cap can close the housing next to the push button, leaving an annular gap cover between push button and cap.

The cap end just before the base of the housing.

In order to pass light only through the lower part of the housing in a special embodiment of the invention to leave, the cap can be designed so that it covers only the upper part of the housing. For this purpose, a holder for a name tag can be placed in the part of the housing that is not covered by the cap be provided.

In order to make the switch shapely, the parts of the housing not covered by the cap can be offset so that they are at least aligned with the adjacent part of the cap.

For the purpose of the best possible conclusion of the switch from the environment can a The eye that encloses the push button and passes through the annular gap can be provided protrudes slightly above the cap.

In order to avoid tilting the push button when it is pressed, the switch can be designed in this way be that the push button rests on one of the contacts at three points.

To generate an additional bias of the push button can in the invention

809 628/1365

Pressure switch a compression spring can be attached between the push button and one of the contacts.

In the drawings, two exemplary embodiments of the invention and a modification are shown. It shows

F i g. 1 is a diagrammatic representation of an electrical Switch according to the invention,

FIG. 2 is a rear view of the switch of FIG. 1 on a larger scale,

F i g. 3 shows a section along the line 3-3 in FIG. 2,

F i g. 4 shows a diagrammatic representation of a further switch according to the invention;

FIG. 5 is a rear view of the switch of FIG. 4 on a larger scale,

F i g. 6 shows a section along the line 6-6 of FIG. 5,

F i g. 7 shows a section along the line 7-7 of FIG. 6,

arc, the free end of which is at a greater distance from the free end of the contact spring 33 than its starting point located. The free end of the tongue 42 also rests on the edge 28. The push button is accordingly in contact with the contact spring at three points. Contacts 32 and 33 also have upright spring tongues 34, which each the ends of a tube saving lamp 35 against Clamp two triangular lugs 31 releasably on the side walls of the chamber 24 (FIG. 2). The flat spring contacts 32 and 33 are also provided with U-shaped lugs 43 which are inserted into openings 44 in the Cover 20 of the chamber 24 sit tightly.

A compression spring 36 is between the shoulder 29 and the ends of the contact spring 33 and their Tongue 42 attached.

The free edge of the cover 12 rests on the shoulder 17. In the bottom of the lid 12 is located a circular opening 37 through which the eye

F i g. 8 a circuit diagram of a conventional circuit ao 22 emerges somewhat. The cover 12 is located

for each of the two aforementioned switches and F i g. 9 a modified contact design.

The in F i g. 1 to 3 switch shown consists of a rectangular housing 11, which is in a

Piece made of a colorless, transparent material 25 which fits into the corresponding openings 38 is shaped with a high refractive index. The sides of the cover 12 are approximately aligned for example polymethyl methacrylate. On the housing 11 is an opaque, preferably

at a distance from the shoulder 18 and is clamped onto the housing 11 at openings 38; through his natural elasticity, it is held on the housing with the help of nose-shaped lugs 45,

black, removable cap 12 resiliently resilient on the lower part of the housing 11, however, as already mentioned, the eye 22 protrudes slightly over the surface of the lid to the eventual

clamped, roughly cube-shaped with slightly inclined 30 entry of water into the gap between the

Push button 23 and the eye 22 to complicate. The heads of the fastening screws 16 are located located in the cavity between the shoulder 18 and the cover 12.

A narrow edge recess 46 is provided in the shoulder 17 next to the cap 12 in order to decrease to facilitate the cap.

The switch is operated in the usual way by pressing the button 23, so that the contact 33 comes into contact with contact 32. The spring 36 assists the return movement of the button and gives a pleasant touch when pressed.

When the lamp 35 is lit, the light occurs

Pages is switched. The cap 12 is made of hardened polymethyl methacrylate.

From the two shorter sides of the housing, two eyes 14 extend inwardly with openings 15 for holding screws 16 (Fig. 3), by means of which the switch on a door, a door post or the like. Can be attached. The housing 11 has one over the circumference of his lower part extending step-shaped shoulder 17. The housing 11 is also inside at 18 graduated above the base of the eyes and has a further step at 19, which is a surface of the Housing forms. A bore 21 enclosed by an eye 22 extends through the surface

19 and forms a guide for a hollow _{push button 45} through the eye 22 so that a visible light ring button 23. The push button 23 is also made of poly- around the push button appears, and further

occurs that

methyl methacrylate. It is white and opalescent. The housing 11 is hollow and has a inner chamber 24, which extends upwards to just under light through the base of the housing II below paragraph 17, creating a visible »halo«. The light also passes through the Push button 23 and creates one

the outer step 18 extends. A hole 25 out of 50 opalescent

larger diameter than the bore 21 runs "light point".

from the chamber 24, it is inwardly at 26.

levels and goes into the guide 21. The pressure-borne similar contact 91 (Fig. 9) to be replaced

button 23 has at its inner end an outer one which has an opening 92 which is attached so as to

flange 27 and edge 28. Inside is the push button 23 ₅₅ that the push button 23 through a "point of light" near its opening on a larger one

in the name of his own fault Diameter graduated at 29.

Two elastic flat spring contacts 32 and 33 made of phosphor bronze are on the ceiling of the chamber 24 fastened by means of screws 30 and extend across the opening 25. The shorter contact spring 32 is cranked downward into the chamber 24 away from the push button 23. The longer contact spring 33 is cranked after the push button 23, so that its free end, which is a bent nose for a has better electrical contact with the contact spring 32, rests on the bottom of the edge 28. A tongue 42 is illuminated from the flat spring 33.

In the case of the in FIG. 4 to 7, the switch also consists of a hollow one translucent housing 51, which is divided internally by a transverse wall 54 into two chambers 52 and 53 is. The part of the housing 51 above the chambers 52 is recessed at 55 and an eye 56, similar to the eye 22 of the previous embodiment, is on the surface of the recess intended. A transverse recess 57 is made in the chamber 53, onto which two contacts 58 and 59 made of phosphor bronze are screwed on. The design of these contacts

Hch the contacts 32 and 33. These contacts 58 and 59 have resilient tongues 58 a, 59 ″ which rest against the contact ends of a tubular energy saving lamp 60 and press the lamp against rectangular lugs 260 which protrude from the transverse wall 54. In this position the glass of the lamp 60 is spaced from the transverse wall 54. Two countersunk screw bores 61 extend through the reinforcement 57 and through the contacts 58, 59 so that screws 62 can pass through from the surface of the recess 55 to To attach the switch to a door, door post or the like. The openings in the contacts 58, 59 are dimensioned sufficiently large so that the screws 62 are sufficiently removed from the parts of these contacts surrounding the openings. An opening 63 extends through the reinforcement 57; it is stepped at 64 from a larger diameter 63 to a smaller diameter 65, which latter part of the opening runs through the eye 56 in a delayed manner. An opaque, hollow push button 66, which is formed from white polymethyl methacrylate, is guided in the opening. The circumference of the push button 66 is stepped to a larger diameter at 67 so that its smaller diameter lies in the smaller diameter portion 65 of the opening and its larger diameter lies in the larger diameter portion of the opening, while its shoulder usually rests against shoulder 64 . The push button 66 is also set off at 68 on the inside. The end of the larger diameter part of the push button 66 rests on the free ends of the contact 59 and its bent tongue 160, which provide a three-point support. A compression spring 69 made of stainless steel rests against the shoulder 68 and the contact 59 in a manner similar to that of the spring 36 in the first embodiment described.

An arcuate prismatic light guide 71 is guided around the upper part of the opening 63; it is used for intensified illumination on the upper side of the eye 56.

A one-piece black cap 72 made of hardened polymethyl methacrylate is covered chamber 52 and is in recess 55 in alignment with the other parts of the housing. The cap 72 has an opening 73 through which the eye 56 protrudes somewhat. Approaches 74 are on top of each other opposite sides of the housing 51 and cover 72 attached so that the latter on the former can be clamped resiliently.

A nameplate 75 can be accommodated in the chamber 53 by means of a plastic card holder 76 will. This card holder 76 can be made of colorless clear polymethyl methacrylate be. It is essentially box-shaped with an inclined face 77 and is in the Chamber 53 pushed in.

Light from lamp 60, when the latter is on, passes through eye 56 so that a visible ring of light appears around button 66 . The light also passes through the lower part of the housing 51 and illuminates the nameplate 75. Furthermore, if the switch is mounted, for example, over a keyhole in a door, the latter is also illuminated.

To operate the switch, the push button 66 is pressed. As a result, the contact 59 comes against contact 58 in Appendix. When the pressure on the button 66 ceases, the latter becomes due to the elasticity of the contact 59 and the spring 69 moved outward so that the contact 59 is from the Contact 58 releases.

A common circuit for the switch and signaling device is shown in FIG. 8 shown. The one with designated switch and the signaling device are in series with the secondary winding of a Bell transformer 83 switched. The contacts 84, 85 are usually open, and those with the Contacts 84, 85 connected in the manner described above, lamp 86 is usually switched on. If the contacts 84, 85 are closed when the switch is actuated, the lamp 86 is short-circuited and switched off.

The switches described above are pleasant to look at and if they are on a door, A door post or the like. Are attached, this sight is through the light ring around the push button and increases the halo of the other portions of the housing not covered by the cap. This feature helps considerably in locating the push button in the dark. Since also the housing is molded in one piece and carries all parts of the switch, the assembly is done of the switch is made much easier.

The housing can also be made of an opalescent polymethyl methacrylate or the like, to achieve a diffuse lighting effect.

Claims (9)

Patent claims: 1. Electrical pressure switch, consisting of a coherent, transparent or translucent housing with at least one hole for a fastening screw, a main passage opening in the front, a pair of contacts, a holder for a lamp in the housing and a push button that can be slid in the main opening to close the Contacts, characterized in that the contacts (32, 33; 58, 59) together with lamp holder (31, 34; 58 a, 59 a) with lamp (35, 60) and push button (23, 66) directly in the connected housing ( 11,51) with one screw each is visible through the cap covered part. 2. Switch according to claim 1, characterized in that the cap (12, 72) covers the housing (11, 51) next to the push button (23, 66) leaving an annular gap between the push button and cap through which a "light ring" passes . 3. Switch according to claim 1 or 2, characterized in that the cap (12) just before the The base of the housing (11) ends, through which an "atrium" passes. 4. Switch according to one or more of the preceding claims, characterized in that that the cap (72) covers only the upper part of the housing, through its entire lower Part of light can pass through. 5. Switch according to claim 4, characterized in that a holder (76) for a name Shield (75) is mounted in the part of the housing (51) not covered by the cap (72). 6. Switch according to one or more of the preceding claims, characterized in that the parts (17, 55) of the housing (11, 51) not covered by the cap (12, 72) are offset so that they are at least connected to the adjacent one Align part of the cap. 7. Switch according to claim 2 and 6, characterized in that one eye (22,56) the push button (23,66) and passes through the annular gap and over the cap (12, 72) something protrudes. 8. Switch according to one or more of the preceding claims, characterized in that that the contacts (32,33; 58,59) are elastic and that the push button (23, 66) rests on one of the contacts at three points. 9. Switch according to one or more of the preceding claims, characterized in that that a compression spring (36, 69) is attached between the push button and one of the contacts is. Considered publications:
German Patent Nos. 834414, 1044679;
German utility model No. 1776 340;
French Patent No. 1231548;
Publication "Friedland Bells and Chimes" from V. & E. Friedland Ltd., March 1957. 1 sheet of drawings 809 628/1365 10.68 © Bundesdruckerei Berlin