EP0644568B1 - Safety switch - Google Patents
Safety switch Download PDFInfo
- Publication number
- EP0644568B1 EP0644568B1 EP94114007A EP94114007A EP0644568B1 EP 0644568 B1 EP0644568 B1 EP 0644568B1 EP 94114007 A EP94114007 A EP 94114007A EP 94114007 A EP94114007 A EP 94114007A EP 0644568 B1 EP0644568 B1 EP 0644568B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mass
- spherical
- safety switch
- contact
- convex
- 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.)
- Expired - Lifetime
Links
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
Definitions
- the present invention relates to a safety switch of the normally closed kind for vehicle engines, and more particularly pertains to a safety switch inserted in the fuel pump electric circuit.
- the function of the switch is to open responsive to acceleration or deceleration exceeding a predetermined intensity to which the vehicle is subjected in a horizontal plane.
- the switch must not be responsive to jerks or vibration of normal intensity.
- Switches of this kind are well known, for example those disclosed in US-A-2206067 and EP-A-0038328. These devices have a drawback in that they are rather complex and costly from a constructional point of view. Some of them are also rather difficult to reset in their original position after they have been activated.
- FR-A-2 620 855 discloses a safety switch inserted in an electric circuit of a vehicle.
- the switch comprises:
- the present invention seeks to provide an improved safety switch capable of overcoming the above problem.
- the safety switch comprises a fixed housing 1, preferably made of plastic material, consisting of a bottom portion 53 and a downwardly tapered side wall portion 43 on top of which a cap 40 is fitted.
- the cap 40 forms a cylindrical portion 43 extending upwardly from a base 42, in the centre of which a central dead hole 44 and four openings 45 (of which only two are visible in the drawing) are obtained.
- a push button 46 is slidably accommodated in the upper part of the cap 40.
- the push-button 46 rests on the base of the cap by means of a returning spring 47.
- the openings 45 let through four projections 48 (of which only two are visible in the drawing of figure 1) that are integral with the push-button 46 and have lower outwardly diverging inclined surfaces 49.
- An inner cup 50 consisting of a bottom portion 51 and a cylindrical wall 52, is fixed between the frustoconical portion 43 of the lower body 1 and the base 42 of the cap 40.
- the bottom 51 of the cup 50 provides a central bore for accommodating a floating pin 54 that is interposed between the spherical mass 22 and the contact in form of elastic lamina 11.
- This lamina is fixed in bottom portion 53 of the body 1 and is movable between a lower fixed contact 12 of normally closed kind and an upper contact 13 of normally open kind fixed to the bottom portion 53.
- the elastic lamina 11 and the floating pin 54 are biased upwardly by means of a spring 30 resting on the bottom portion 53 of lower body 1.
- the lower body 1 also forms a watertight connector 55 for electric connection to the fixed contact 13.
- the top of the switch is covered by a gasket 56 that renders the inner parts of the switch watertight.
- the safety switch may also be utilised for other devices, providing the same advantages.
- the contact 13 is closed so that a warning light (not shown) located in the passenger cabin is lit up to indicate the operation of the switch.
- FIG. 2 differs from that of Figure 1 in that the floating pin 54 is arranged having an upper narrow shaft portion 54a and a lower downwardly open larger cup portion 54b.
- Floating pin 54 is no longer interposed between the spherical mass 22 and the elastic lamina 11, (as shown in Figure 1), as shaft portion 54a is inserted in a corresponding bore obtained in the elastic lamina 11.
- Bottom spring 30 is fitted within cup portion 54b and urges the upper end of shaft portion 54a directly against mass 22.
- Lamina 11 is arranged so as to normally close upon lower fixed contact 12 ( Figure 2).
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
- Control Of Combustion (AREA)
- Air Bags (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO930683A IT1261869B (it) | 1993-09-17 | 1993-09-17 | Interruttore di sicurezza. |
ITTO930683 | 1993-09-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0644568A1 EP0644568A1 (en) | 1995-03-22 |
EP0644568B1 true EP0644568B1 (en) | 1997-06-25 |
Family
ID=11411739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94114007A Expired - Lifetime EP0644568B1 (en) | 1993-09-17 | 1994-09-07 | Safety switch |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0644568B1 (pt) |
BR (1) | BR9403538A (pt) |
DE (1) | DE69403944T2 (pt) |
ES (1) | ES2105449T3 (pt) |
IT (1) | IT1261869B (pt) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT237159Y1 (it) * | 1995-09-20 | 2000-08-31 | Cavis Srl | Sensore di impatto particolarmente studiato per veicoli |
IT1304681B1 (it) * | 1998-10-08 | 2001-03-28 | Kostal Italia S R L | Interruttore di sicurezza destinato ad essere interposto in uncircuito elettrico di un veicolo. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH351011A (fr) * | 1959-03-09 | 1960-12-31 | Hydromecanique De Precision S | Dispositif irréversible de fermeture d'un circuit électrique |
CH486345A (de) * | 1969-04-02 | 1970-02-28 | Herzog Albert | Stromkreisunterbrecher für Kraftfahrzeuge |
FR2151585A5 (pt) * | 1971-08-27 | 1973-04-20 | Corporandy Joseph | |
DE3128594A1 (de) * | 1981-07-20 | 1983-02-03 | Dannenberger Vorrichtungsbau -DAVO - Stellamanns u. Grönwoldt, 3138 Dannenberg | "vorrichtung zum erfassen und zur anzeige einer uebermaessigen verzoegerung der fahrt eines kraftfahrzeuges" |
FR2620855A1 (fr) * | 1987-09-18 | 1989-03-24 | Wermuth Jean | Detecteur d'impact circonferentiel a rearmement manuel applicable a la commande d'arret d'organes par exemple pour vehicules et bateaux |
-
1993
- 1993-09-17 IT ITTO930683A patent/IT1261869B/it active IP Right Grant
-
1994
- 1994-09-07 ES ES94114007T patent/ES2105449T3/es not_active Expired - Lifetime
- 1994-09-07 EP EP94114007A patent/EP0644568B1/en not_active Expired - Lifetime
- 1994-09-07 DE DE69403944T patent/DE69403944T2/de not_active Expired - Fee Related
- 1994-09-13 BR BR9403538A patent/BR9403538A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69403944T2 (de) | 1997-11-20 |
BR9403538A (pt) | 1995-05-16 |
IT1261869B (it) | 1996-06-03 |
ITTO930683A0 (it) | 1993-09-17 |
ES2105449T3 (es) | 1997-10-16 |
EP0644568A1 (en) | 1995-03-22 |
DE69403944D1 (de) | 1997-07-31 |
ITTO930683A1 (it) | 1995-03-17 |
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