FR2495374A1 - BREAKING DEVICE OF THE TYPE "ICE BREAK" - Google Patents

Abstract

Interlocking device of the "broken glass" type intended to prevent inadvertent engagement of an actuator. The device is in particular of the type comprising an action member 2, for example a push-button, and a plate 4 disposed above said action member and preventing any untimely action thereon, the device being characterized in that that at least a portion of said plate 4 is elastically deformable in a reversible manner between two stable shapes, one corresponding to a standby position, for which the plate 4 is convex outwardly, thus leaving the member d 'action 2 in the triggered position, the other corresponding to an engagement position, for which the plate is convex inwardly, thereby engaging the action member 2. Application to alarm devices in general. (CF DRAWING IN BOPI)

Description

The invention relates to an interlocking device of the type "breakage of

  ice "intended to prevent the engagement

untimely action.

  The "breakage of ice" are well known: the organ of action, in this case a push-button, is protected by a

  ice that must be broken before it can be engaged.

  This type of protection against inadvertent engagement has two major disadvantages: - Projection of small glass chips that penetrate the floor coverings, can be dangerous

and are difficult to remove.

  - Relatively long rearming, by replacing the broken glass with a new glass, which prohibits the

  full-scale control tests.

  The present invention relates to a device for

  triggering the kind of "breakage of ice" avoiding these inconveniences.

  vantages. This engagement device is of the kind comprising an action member and a plate disposed above said action member and preventing any inadvertent action on it, and is characterized in that at least a part of

  said plate is resiliently reversibly deformable

  sible between two stable forms, one corresponding to a waiting position, for which the plate is curved towards

  the outside and thus leaves the action member in a decent position.

  latched, the other corresponding to an alarm position, for which the plate is curved inwards and latches

therefore the organ of action.

  The transition from the waiting position to the alarm position is effected by a voluntary thrust or by a shock, for example by means of a hammer; at the reset, the passage from the alarm position to the waiting position can be done directly, using a specialized tool, or by disassembling and reassembling the assembly, using a tool usual, by

example a screwdriver.

  Anyway, thanks to the invention, the passage of the action member from the waiting position to the alarm position is without real breakage of ice or splinters projection, and the speed possible rearmament allows full-scale tests, the shortness of the triggering being impossible.

  in this case, it is confused with a real trigger.

  The characteristics and advantages of the invention

  will emerge from the description which follows, with reference

  to the accompanying diagrammatic drawings in which: - Figure 1 is a sectional view of an embodiment of the interlocking device according to the invention, along the line I-I of Figure 2; - Figure 2 is a plan view along the arrow II of Figure 1; - Figure 3 is a view similar to that of Figure 1, the push button being engaged; - Figure 4 is a plan view of a second embodiment of the plate that comprises the interlocking device according to the invention; Figure 5 is a view similar to that of Figure 1, for another embodiment of the interlocking device according to the invention; Figure 6 is a plan view of the plate in this other embodiment; FIG. 7 is a plan view of another embodiment of the interlocking device according to the invention; - Figure 8 is a view similar to that of Figure 3 and showing how to reset by means of a special tool plate that includes the interlocking device 1 according to the invention.

  In general, the interlocking device.

  according to the invention comprises a housing 1 serving as a housing for a pushbutton 2. A lid 3, which is in the form of a

frame, close the case 1.

  In the embodiment shown in FIGS. 1 to 3, the cover 3 is removably attached by screws 10 to the housing 1 and is rectangular; by two of its opposite internal edges, it forms a housing 31, which is in fact constituted by an indentation made in its

thickness 3.

  A rectangular plate 4, which is made of elastic material

  tic, is engaged by force in this housing 31, by a part of its periphery, namely its two corresponding opposite edges; its relative dimensions, between these two opposite edges, are greater than those of the housing 31, so that it can not take a flat shape and is instead, by elasticity, reversibly deformable between two stable shapes, one corresponding to a waiting position, for which it is "bulging" towards the outside of the housing 1, the other corresponding to an alarm position, for which it is "curved" towards 1 '

inside of it.

  In FIG. 1, the plate 4 is "curved" towards the outside.

  the case; she is then at a distance from the

  pushbutton 2 and this is in the triggered position

or "waiting position".

  In FIG. 3, following a pressure or shock, the plate 4, after elastic crossing of a neutral configuration, is bulged towards the inside of the casing 1. The push-button 2 being positioned accordingly, it engages the latter and keeps it in this position

  switched on, or "alarm position".

  Any real breakage of ice is avoided, and the rearming of the plate 4, that is to say its return to the waiting position, is, in this embodiment, by separating the lid 3 of the housing 1, by removing the screw 10, and in

  acting accordingly on the plate 4.

  In the above, the housing 31 of the frame 3 forms by itself a clamping means of the plate 4, which maintains as described, the curved shape, in one sense

either in the other.

  In another embodiment, FIG. 4, the plate

  4 is also resiliently reversibly deformable

  sible, but its clamping means is formed by a

  gide 43, separate from the cover 3. This embodiment allows to accommodate with play the plate assembly 4 and frame 43

  in the housing 31 of the lid 3, the tolerances of

  brication being less severe.

  In a third embodiment, FIGS. 5 and 6, the rigid frame 43 thus associated with the plate 4 is integral with the latter. The plate 4 in fact comprises in this case three strips: a central strip 41, which, by plastic deformation, by molding, hot deformation, stamping, for example, or other known method, has been preformed so as to have a convex and two sidebands 42 and 421, which are detached from the central band 41, and which are undeformed and therefore planar. Band 41 supposedly deployed

  flat is substantially longer than the strips 42 and 42 '.

  Two transverse strips 44, 44 ', which are integral with the central strip 41, connect the lateral strips 42, 42',

  forming with them the rigid frame 43 associated.

  In a fourth embodiment, the plate 4 is circular in shape and is generally preformed in the form of a spherical segment; the housing 31 of the lid 3 in which it is engaged by its periphery has a suitable circular shape. Advantageously, a seal can be reported on

  the plate 4 so as to make the device tight.

  Whatever the embodiment chosen, the plate 4 may, if desired, be made of transparent material, synthetic material for example, thus recalling the "broken

ice cream "usual.

  The rearming of the plate 4 can, if desired, take place

without disassembling the cover 3.

  For example, Figure 8 shows how a special tool

  5, introduced into the box 1 through an opening

  11 provided for in this one and giving access to the underside

  of the plate 4, allows the shaping of the latter.

  Advantageously, the opening It is narrow, of such

  so that only a specialized tool can be engaged.

  Of course, the present invention is not limited to the embodiments described and shown, but encompasses any variant embodiment and / or combination of

their various elements.

  In particular, only a portion of the plate used can be deformable reversibly between two

  stable forms; for example, with regard to the circulatory form

  illustrated for this plate in FIG. 7, only the central portion of such a plate could be preformed into a spherical segment, the rest of this plate being

otherwise plan.

  In addition, the organ of action that it controls, is not necessarily a push button; he could for example

  be directly an electrical contact.

  In addition, such an organ of action can be reported

  on the housing that contains it, be integrated into it.

  This housing, meanwhile, can be projecting on any support surface, or embedded in it, with for example, according to known methods,

a screw or claw fastener.

  Finally, it will be noted that, in case of necessity, in the momentary absence of availability of the plate according to the invention, such a plate can be replaced by a traditional glass plate, and the interlocking device, still be,

despite everything, operative.

Claims (7)

  1-type engagement device comprising an action member and a plate disposed above said action member and preventing any inadvertent action on -5 thereof, the device being characterized in that a portion at least of said plate (4) is reversibly elastically deformable between two stable forms, one corresponding to a waiting position, for which the plate (4) is bulged outwards, thus leaving the action member (2) in the tripped position, the other corresponding to a latching position, for which the plate is domed inwards, latching from this makes the organ of action (2).   2- interlocking device according to claim 1, characterized in that said action member (2) is a push button. 3- interlocking device according to any one   of claims 1 and 2, characterized in that the plate   (4) is held in shape by a clamping means (31, 43).   4- Closing device according to claim 3, characterized in that the clamping means is constituted by two opposite housings (31) of a cover (3), in which   the plate is engaged by at least part of its periphery   series. 5- interlocking device according to claim 3, characterized in that the clamping means is a rigid frame (43). 6. Interlocking device according to claim 3, characterized in that the plate (4) has two parts, one (41) elastically deformable in a reversible manner, the other forming the rigid frame (43) associated with it Interlocking device according to claim 6, characterized in that the deformable part of the plate (4) is a central band (41), the rigid frame (43) consisting of two lateral bands (42, 42 ') which are detached from the central band (41), and by two bands   cross-sections (44, 44 '), which form part of the central strip   (41), and which connect the side strips (42, 42 ').   8- Interlocking device according to any one of   Claims I to 7, characterized in that a seal is   attached to the plate (4) so as to seal the device. 9Installation device according to any one of   claims I to 8, and wherein the action member is   disposed in a housing (1) closed by the plate (4), characterized   in that it is provided in the housing (1), a passage   (11) providing access to the underside of the plate (4).   10- interlocking device according to claim 9, characterized in that the passage (11) is narrow of such   so that only a specialized tool can be engaged.   11- Interlocking device according to any one of   claims 1 to 8, wherein the action member is   disposed in a housing (1) closed by a cover (3) forming a housing for the plate (4), characterized in that the   lid (3) is removably attached to the housing.   12- Closing device according to any one of   Claims I to 8, characterized in that the plate (4) is   made of transparent material.