GB2313614A - Breakable cover for an emergency control device - Google Patents
Breakable cover for an emergency control device Download PDFInfo
- Publication number
- GB2313614A GB2313614A GB9611369A GB9611369A GB2313614A GB 2313614 A GB2313614 A GB 2313614A GB 9611369 A GB9611369 A GB 9611369A GB 9611369 A GB9611369 A GB 9611369A GB 2313614 A GB2313614 A GB 2313614A
- Authority
- GB
- United Kingdom
- Prior art keywords
- breakable cover
- blow
- piece
- cover
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/12—Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators, e.g. details of alarm push buttons mounted on an infrastructure
Abstract
A cover 10 for a emergency control device comprises a piece of toughened glass 11 held in a box (figure 1). The glass 11 has a weakened section 12 formed by a V-shaped cut groove 13. The cover also includes a breakage inducing means 14 having a blow receiving plate 15, a wedge-shaped metal bar 16 and a resilient stabiliser ring 17.
Description
COVERS FOR EMERGENCY CONTROLS
This invention relates to a cover for emergency control means and to a method of gaining access to an emergency control.
Previous attempts to provide covers for emergency control means have comprised one face of a box or the like covering the emergency control means comprising a sheet of glass. When access to the emergency control means is required the glass must be broken with a hammer or other suitable instrument. The use of glass as a breakable cover has a number of disadvantages associated with it.
If a person attempts to break the cover by using their fist or elbow for instance then shards of the broken glass can cut the person, which is obviously very undesirable.
Also, shards of glass could fall onto the emergency control means and block access to the control means.
Shards of glass may also fall from the control means and onto important pieces of equipment or the like, where shards of glass may be extremely dangerous.
It is necessary to use a breakable cover so that the emergency control means cannot be used inadvertently.
Also the cover is needed so that the emergency control means is less likely to be used needlessly because a person must consciously decide to break the cover and operate the control.
It is an object of the present invention to address the disadvantages described above.
According to one aspect of the present invention a breakable cover for an emergency control means comprises a piece of toughened glass having a weakened section therein.
The weakened section may comprise a groove in the piece of toughened glass. The groove may have a V-shaped cross section. The groove may comprise a V-cut. The groove may extend substantially across the whole of the piece of toughened glass.
The piece of toughened glass may be arranged such that when it is struck by a force above a predetermined level then the glass will break into a plurality of small pieces. The piece of toughened glass may be arranged such that the broken pieces of toughened glass do not form shards. The broken pieces of toughened glass may be smaller than would be obtained by breaking a piece of standard glass.
The cover may comprise breakage inducing means. The breakage inducing means may be located in a region where said breakage inducing means are operative. The breakage inducing means may be attached to the piece of glass. The breakage inducing means may be located substantially adjacent to the weakened section of glass. The breakage inducing means may be located along at least part of the groove in the piece of glass.
The breakage inducing means may include a force concentrating portion, which may be aligned substantially along the groove. The force concentrating portion is preferably made of durable material. The force concentrating portion may be a metal bar. The force concentrating portion may have a circular cross section.
The force concentrating portion may have a triangular cross section.
The breakage inducing means may include a blow receiving portion arranged to be struck when it is desired to break the piece of glass. The blow receiving portion may have at least one outwardly facing substantially flat face. The blow receiving portion may be attached to the force concentrating portion. The blow receiving portion may transfer the force of a blow to the force concentrating portion. The blow receiving portion and the force concentrating portion may transfer the force of a blow to the weakened section of the piece of glass.
The blow receiving portion may have at least one stabiliser. The or each stabiliser may be arranged to hold the blow receiving portion in position. The or each stabiliser may be arranged to hold the blow receiving portion above the force concentrating portion. The or each stabilising portion may be arranged to hold the blow receiving portion and force concentrating portion substantially adjacent to the weakened section of the piece of glass.
The or each stabiliser may be made from a resilient material. The or each stabiliser may be located between the blow receiving portion and the piece of glass. The resilient material of the or each stabiliser may deform under the force of a blow and thus resist the force of the blow from being transferred directly from the blow receiving portion to the piece of glass.
According to another aspect of the present invention a method of gaining access to an emergency control comprises causing a breakable cover to break by striking a weakened section, said cover comprising a piece of toughened glass.
The method may include the weakened section comprising a groove in the toughened glass.
The method may include striking breakage inducing means to break the cover. The method may include the breakage inducing means being located in a region where said breakage inducing means are operative.
The method may include the breakage inducing means including a force concentrating portion, which may be aligned substantially along the groove.
The method may include the breakage inducing means including a blow receiving portion, which may be attached to the force concentrating portion.
According to another aspect of the present invention a method of gaining access to an emergency control comprises causing a breakable cover to break by striking a blow receiving portion, which blow receiving portion is attached to a force concentrating portion, the force concentrating portion concentrating the force of the blow onto a weakened section of a piece of toughened glass.
Any of the features or limitations referred to herein may be used in relation to any aspect of the present invention.
The present invention may be brought into practice in various ways but one embodiment will now be described with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic perspective view of a prior art emergency control cover;
Figure 2 is a diagrammatic view from above of an emergency control cover;
Figure 3 is a plan view from below of breaking inducing means of an emergency control cover;
Figure 4 is a cross sectional view of the breakage inducing means shown in Figure 3.
An emergency control cover 10 comprises a piece of toughened glass 11 held in a box 12 similar to that shown in a prior art device in Figure 1. The piece of toughened glass 11 has a weakened section 12 formed by a V-cut groove 13 as shown in Figure 2. The emergency control cover 10 also comprises breakage inducing means 14 having a blow receiving plate 15, wedge portion 16 and resilient stabiliser ring 17.
In use, when access to the emergency control is required the blow receiving plate 15 is struck with a suitable implement eg a hammer. The force of the blow is then passed to the wedge portion 16. A pointed part 18 of the wedge portion 16 is in contact with the surface of the piece of toughened glass 11. Thus, when the blow receiving plate 15 is struck the force of the blow is concentrated in the pointed part 18 of the wedge portion 16 and from there to the piece of toughened glass 11.
A blow of sufficient force on the blow receiving plate 15 will cause the piece of toughened glass 11 to break, starting from the weakened section 12. The glass will shatter into small pieces. In prior art emergency control covers breaking of the piece of glass would result in shards of glass being made. It is highly undesirable that shards of glass are created because of the obvious dangers to the person breaking the emergency control cover and any important equipment surrounding the emergency control. The small fragments of glass created when the piece of toughened glass 11 is broken are considerably less dangerous to the person breaking the glass and also to surrounding equipment.
The resilient stabiliser ring 17 is caused to deform when the blow receiving plate 15 is struck. Deformation of the stabiliser ring 17 does not, therefore, transmit any significant force from the blow receiving plate via the stabilising ring 17 to the piece of toughened glass 11. Thus the force transmitted to the weakened area 12 of the piece of toughened glass 11 is maximised.
The shape of the wedge portion 16 may be varied whilst still having the same effect. For instance, a bar of circular cross section would have a similar effect in concentrating the force of a blow on the striking portion 15.
The blow receiving plate 15 in this embodiment is shown as being circular, but this shape may be varied without having any effect on the function of the emergency control cover.
The breakage inducing means 14 may be attached to the piece of toughened glass 11 by various means. In this example, the breakage inducing means 14 have been attached to the piece of toughened glass 11 by means of adhesive between the ring 17 and the glass 11.
It is a further possibility that the wedge portion 16 and the blow receiving plate 15 are formed from one piece of material which has been moulded. The requirements for the wedge portion 16 and the blow receiving plate 15 are that they be of a hard material. This material may be a plastics material or metal, for instance.
The use of a piece of toughened glass 11 in this specific embodiment runs contrary to normal uses of toughened glass. Normally, toughened glass is used in situations where it is desired that the piece is not broken. However, in this situation, the more desirable breaking properties of toughened glass have been utilised to provide a safer and more convenient emergency control cover.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (33)
1. A breakable cover for an emergency control means comprises a piece of toughened glass having a weakened section therein.
2. A breakable cover as claimed in claim 1, which comprises breakage inducing means.
3. A breakable cover as claimed in claim 2, in which the breakage inducing means is located in a region where said breakage inducing means are operative.
4. A breakable cover as claimed in one of claims 2 or 3, in which the breakage inducing means is attached to the piece of glass.
5. A breakable cover as claimed in any one of claims 2 to 4, in which the breakage inducing means is located substantially adjacent to the weakened section of glass.
6. A breakable cover as claimed in any preceding claim, in which the weakened section comprises a groove in the piece of toughened glass.
7. A breakable cover as claimed in claim 6, in which the groove has a "V"-shaped cross section.
8. A breakable cover as claimed in one of claims 6 or 7, in which the groove extends substantially across the whole of the piece of toughened glass.
9. A breakable cover as claimed in any one of claims 2 to 8, in which the breakage inducing means is located along at least part of the weakened section.
10. A breakable cover as claimed in any one of claims 2 to 9, in which the breakage inducing means includes a blow receiving portion arranged to be struck when it is desired to break the piece of glass.
11. A breakable cover as claimed in claim 10, in which the blow receiving portion has at least one outwardly facing, substantially flat face.
12. A breakable cover as claimed in any one of claims 2 to 11, in which the breakage inducing means includes a force concentrating portion.
13. A breakable cover as claimed in claim 12, in which the force concentrating portion is made of a durable material.
14. A breakable cover as claimed in any one of claims 12 or 13, in which the force concentrating portion is a metal bar.
15. A breakable cover as claimed in any one of claims 12 to 14, in which the blow receiving portion is attached to the force concentrating portion.
16. A breakable cover as claimed in any one of claims 12 to 15, in which the blow receiving portion transfers the force of a blow to the force concentrating portion.
17. A breakable cover as claimed in any one of claims 12 to 16, in which the blow receiving portion and the force concentrating portion transfer the force of a blow to the weakened section of a piece of glass.
18. A breakable cover as claimed in any one of claims 12 to 17, in which the blow receiving portion has at least one stabiliser arranged to hold the blow receiving portion above the force concentrating portion.
19. A breakable cover as claimed in claim 18, in which the or each stabilising portion is arranged to hold the blow receiving portion and force concentrating portion substantially adjacent to the weakened section of the piece of glass.
20. A breakable cover as claimed in any one of claims 18 or 19, in which the or each stabiliser is made from a resilient material.
21. A breakable cover as claimed in any one of claims 18 to 20, in which the or each stabiliser is located between the blow receiving portion and the piece of glass.
22. A breakable cover as claimed in any one of claims 18 to 21, in which the resilient material of the or each stabiliser deforms under the force of a blow and thus resists the force of the blow from being transferred directly from the blow receiving portion to the piece of glass.
23. A breakable cover as claimed in any preceding claim, in which the piece of toughened glass is arranged such that when it is struck by a force above a predetermined level then the glass will break into a plurality of small pieces.
24. A method of gaining access to an emergency control comprises causing a breakable cover to break by striking a weakened section, said cover comprising a piece of toughened glass.
25. A method as claimed in claim 24, which includes the weakened section comprising a groove in the toughened glass.
26. A method as claimed in one of claims 24 or 25, which includes striking breakage inducing means to break the cover.
27. A method as claimed in claim 26, which includes the breakage inducing means being located in a region where said breakage inducing means are operative.
28. A method as claimed in claim 26 or 27, which includes the breakage inducing means including a force concentrating portion.
29. A method as claimed in any one of claims 26 to 28, which includes breakage inducing means including a blow receiving portion.
30. A method according to claim 29, in which the blow receiving portion is attached to the force concentrating portion.
31. A method of gaining access to an emergency control comprises causing a breakable cover to break by striking a blow receiving portion, which blow receiving portion is attached to a force concentrating portion concentrating the force of the blow onto a weakened section of a piece of toughened glass.
32. A breakable cover for an emergency control means substantially as described herein, with reference to figures 2 to 4 of the accompanying drawings.
33. A method of gaining access to an emergency control substantially as described herein, with reference to figures 2 to 4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9611369A GB2313614A (en) | 1996-05-31 | 1996-05-31 | Breakable cover for an emergency control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9611369A GB2313614A (en) | 1996-05-31 | 1996-05-31 | Breakable cover for an emergency control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9611369D0 GB9611369D0 (en) | 1996-08-07 |
| GB2313614A true GB2313614A (en) | 1997-12-03 |
Family
ID=10794570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9611369A Withdrawn GB2313614A (en) | 1996-05-31 | 1996-05-31 | Breakable cover for an emergency control device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2313614A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2435546B (en) * | 2006-02-28 | 2009-07-22 | Maxhunt Ltd | Call points |
| CN101118686B (en) * | 2006-04-10 | 2013-07-10 | 罗伯特·博世有限公司 | Plastic breaking board of the alarm device and the method for manufacturing the alarm device and the breaking board |
| CN108298828A (en) * | 2018-04-26 | 2018-07-20 | 李春雨 | It is a kind of unidirectionally to strike frangible tempered glass |
| EP3624078A1 (en) * | 2018-09-17 | 2020-03-18 | MEP - Gefahrenmeldetechnik Gesellschaft mit Beschränkter Haftung | Device for destroying a breakable, disc-shaped protection element by means of a destruction element |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1103457A (en) * | 1965-06-24 | 1968-02-14 | Minerva Detector Company Ltd | Improvements in and relating to signal devices |
| GB1407804A (en) * | 1971-11-22 | 1975-09-24 | Ciba Geigy Ag | Thermally tempered glazing |
| EP0065826A1 (en) * | 1981-04-28 | 1982-12-01 | Tann-Synchronome Limited | Mechanically actuated signalling apparatus |
| EP0270286A2 (en) * | 1986-11-20 | 1988-06-08 | Signature Industries Limited | Alarm switch |
| EP0367997A2 (en) * | 1988-10-07 | 1990-05-16 | Gerald Dipl.-Ing. Harms | Emergency switch |
| GB2237322A (en) * | 1989-10-28 | 1991-05-01 | David Hoyle | Security case |
| GB2283271A (en) * | 1993-10-08 | 1995-05-03 | Pickersgill Kaye Ltd | Emergency cover plate |
| EP0692601A1 (en) * | 1994-07-15 | 1996-01-17 | RACK SYSTEM S.r.l. | Improved wing particularly designed for application to boxes and casings for fire extinguishers, fire plugs and antifire and antiaccident items |
-
1996
- 1996-05-31 GB GB9611369A patent/GB2313614A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1103457A (en) * | 1965-06-24 | 1968-02-14 | Minerva Detector Company Ltd | Improvements in and relating to signal devices |
| GB1407804A (en) * | 1971-11-22 | 1975-09-24 | Ciba Geigy Ag | Thermally tempered glazing |
| EP0065826A1 (en) * | 1981-04-28 | 1982-12-01 | Tann-Synchronome Limited | Mechanically actuated signalling apparatus |
| EP0270286A2 (en) * | 1986-11-20 | 1988-06-08 | Signature Industries Limited | Alarm switch |
| EP0367997A2 (en) * | 1988-10-07 | 1990-05-16 | Gerald Dipl.-Ing. Harms | Emergency switch |
| GB2237322A (en) * | 1989-10-28 | 1991-05-01 | David Hoyle | Security case |
| GB2283271A (en) * | 1993-10-08 | 1995-05-03 | Pickersgill Kaye Ltd | Emergency cover plate |
| EP0692601A1 (en) * | 1994-07-15 | 1996-01-17 | RACK SYSTEM S.r.l. | Improved wing particularly designed for application to boxes and casings for fire extinguishers, fire plugs and antifire and antiaccident items |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2435546B (en) * | 2006-02-28 | 2009-07-22 | Maxhunt Ltd | Call points |
| CN101118686B (en) * | 2006-04-10 | 2013-07-10 | 罗伯特·博世有限公司 | Plastic breaking board of the alarm device and the method for manufacturing the alarm device and the breaking board |
| DE102006016803B4 (en) * | 2006-04-10 | 2020-12-24 | Robert Bosch Gmbh | Plastic impact disc for an alarm reporting device, alarm reporting device with a striking disc and a method for producing the striking disc |
| CN108298828A (en) * | 2018-04-26 | 2018-07-20 | 李春雨 | It is a kind of unidirectionally to strike frangible tempered glass |
| EP3624078A1 (en) * | 2018-09-17 | 2020-03-18 | MEP - Gefahrenmeldetechnik Gesellschaft mit Beschränkter Haftung | Device for destroying a breakable, disc-shaped protection element by means of a destruction element |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9611369D0 (en) | 1996-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |