AU772019B2 - Safety device for a switch - Google Patents
Safety device for a switch Download PDFInfo
- Publication number
- AU772019B2 AU772019B2 AU59384/00A AU5938400A AU772019B2 AU 772019 B2 AU772019 B2 AU 772019B2 AU 59384/00 A AU59384/00 A AU 59384/00A AU 5938400 A AU5938400 A AU 5938400A AU 772019 B2 AU772019 B2 AU 772019B2
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- Australia
- Prior art keywords
- switch
- safety device
- cover
- securing means
- locking
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- Switch Cases, Indication, And Locking (AREA)
Description
P/00/011 28/5/91 Regulation 3.2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT 0 0:0:.
0 0 :0.0.
00.0 10.0 0 0.0 000.
0..0 0 0: 0 0 Name of Applicant: Actual Inventor Address for service is: Irwin Hubert Harrison Irwin Hubert Harrison WRAY ASSOCIATES 239 Adelaide Terrace Perth, WA 6000 Attorney code: WR Invention Title: "Safety Device for a Switch" This application is a divisional application by virtue of Section 39 of Australian Patent Application 64328/96.
The following statement is a full description of this invention, including the best method of performing it known to me:- The present invention relates to a safety device for a switch and more particularly to a safety device which is especially suited for fitting to the switch of an isolator such as a battery isolator.
Isolators are fitted to the electrical system of various types of machinery to allow for the electrical system of the machinery to be "isolated", thus preventing unauthorised operation of the machinery. Vehicles and machinery left unattended in remote areas, such as on mine sites and the like, are often fitted with isolators for security in addition to standard security fittings such as key locks etc. Further, isolators perform a safety role by preventing the accidental operation of machinery, this feature being especially applicable when the machinery is being serviced. In this respect, the safety device of the present invention may be especially important when consideration is given to any safety regulations made by the relevant authorities.
Isolators generally comprise a casing to hold electrical components such as wiring and a switch, the switch allowing the isolator to be turned on or off as necessary. The switches are of various shapes and sizes and are usually provided on the outside of the casing in a position that allows them to be conveniently accessible to an operator.
Some isolators presently available are fitted with lockable switches. One locking 20 mechanism presently available comprises a bracket fitted to the isolator at the base of the switch. The bracket and the switch are adapted to receive a padlock which passes through the bracket and the switch to limit the operation of the switch. However, this system is less than adequate as the engagement between the bracket, the padlock and the switch may still allow for sufficient movement of the switch to operate the isolator.
Further, locking mechanisms presently fitted to isolators do not incorporate features that prevent the isolator switch from being locked in the on position. In this respect, it may be possible for an operator to leave a piece of machinery, such as a vehicle, running with the isolator switch locked in the on position. This is clearly undesirable.
Whilst the present invention is especially suited for application to isolator switches, it will be appreciated that it may be applied to any switch as required to secure the switch in a given position. For example, the present invention may also be applied to a switch fitted to another component such as a starter motor or the like.
The present invention provides a safety device for a switch, the safety device comprising a securing means capable of being moved from a first position at which the switch is inoperable to a second position at which the switch is operable, the safety device further comprising a means for preventing movement of the securing means to the first position when the switch is on and a locking means for locking the securing means in the first position.
i The safety device may be provided in various forms and its particular configuration depends at least partially on the configuration of the switch to which it is fitted. Thus, the safety device may be adapted to be fitted to a switch by being mounted on to a switch casing. Alternatively, the safety device may be •..°provided integrally with a switch casing. In this respect, it is envisaged that the safety device of the present invention may be provided as an integral part of an 20 isolator or a starter motor as required.
In situations where the safety device is mounted on a switch casing it may further comprise a suitable mounting means. Thus, it will be appreciated that the safety device may be mounted in a variety of ways including, but not being limited to, mounting it via a bracket or a base plate attached to the switch casing at the base of the switch, or elsewhere on the switch casing as necessary. When the mounting means is a bracket it will be appreciated that the configuration of the bracket may vary depending on the form of the switch and/or the switch casing.
Preferably, the safety device of the present invention is provided in the form of a housing wherein the mounting means and the securing means are provided integrally. The housing may be of various forms and preferably at least partially surrounds the switch. In one particular form, the housing includes a cover passing over the switch and sides to more fully enclose the switch.
Thus, in a preferred form the present invention also provides a safety device comprising a housing having a securing means capable of being moved from a first position at which the switch is inoperable to a second position at which the switch is operable, a means for preventing movement of the securing means to the first position when the switch is on, a locking means for locking the securing means in the first position, and a mounting means for mounting the safety device, the mounting means and the securing means being hingedly connected to allow for the securing means to be moved between its first and second positions.
oo i When the safety device includes a housing, the housing preferably comprises a mounting means in the form of a base plate and a securing means in the form of a cover. The cover and base plate are preferably hingedly connected to allow for the cover to be moved between its first and second positions.
The cover may be of various forms and is dependent at least partially on the configuration of the switch to which the safety device is fitted. In this respect, and 20 when in its first position, the cover preferably locks the switch to make it inoperable by at least limiting and preferably preventing movement of the switch.
Thus, the cover may lock the switch by receiving and holding captive at least a portion of the switch, the receipt of the switch in the cover acting to lock the switch when the cover is in the first position. Alternatively or additionally, the cover may abut the switch or may be positioned so as to at least limit the movement of the switch to lock the switch when the cover is in the first position.
When the cover is adapted to receive and hold captive at least a portion of the switch, the cover may be provided with a means for receiving the switch or a portion thereof. The means for receiving the switch may be varied and is at least partially dependent on the shape and configuration of the switch. Preferably, the receiving means includes a gap or space which is located in the cover and shaped to be compatible with and receive the switch or a portion thereof when the cover is in the first position. For example, when the switch is shaped to have a relatively elongate projecting portion, the cover may incorporate a channel which receives the projecting portion of the switch when the cover is in the first position.
When the cover is adapted to abut the switch, the cover may be provided with an abutting means preferably comprising at least one projection which is positioned and configured to assume an abutting relationship with the switch when the cover is in the first position. For example, there may be two projections extending away from the cover to abut and lock the switch when the cover is in the first position.
Alternatively or additionally, when the cover is adapted to at least limit the movement of the switch to lock the switch, the cover may be provided with a means for limiting the movement of the switch, preferably including a projection which may be positioned on the cover so as to prevent movement of the switch to such an extent that the switch is locked when the cover is in the first position.
This projection may be of varied shape and may be in the form of a single elongate projection which extends away from the cover to prevent movement of the switch and thus lock the switch.
S: °.Some isolator switches are formed as keys and as such may be removed from the isolator assembly as required. Thus, alternatively or additionally, the housing may further comprise a barrier member which is adapted to prevent or at least limit the upward movement of the key to prevent the removal or operation of such keys. Preferably, the barrier member is provided as an arm which extends from the base plate and passes over the key thus limiting and preferably preventing the operation and upward movement of the key.
The means for preventing movement of the securing means to the first position when the switch is in the on position and the isolator is disabled may also be of various forms. In one form, said means may be a protrusion provided as part of the housing such as the cover which passes over the switch. Preferably, the protrusion also acts as the projection that locks the switch.
The means for preventing movement of the cover to the first position when the switch is in the on position may also be located in various positions, provided it prevents movement of the cover to the first position when the switch is in the on position. Preferably, said means is adapted so as to come into contact with the switch when the switch is in the on position and the cover is being moved towards its first position. In this form, the physical contact between the means for preventing movement and the switch prevents the cover from movement to the first position and thus prevents the switch from being locked in the on position.
The locking means may be varied without departing from the scope of the present invention. Preferably, the locking means comprises a plurality of apertures, at least one aperture being provided in each of the securing means and the mounting means. The aperture may be adapted to receive a lock such as a padlock or the like, the fitting of the lock to the securing means acting to lock the securing means in the first position.
S" 20 Thus, in a preferred form the present invention provides a safety device which is adapted to be mounted to an isolator, the safety device comprising a securing means in the form of a housing having a cover passing over the switch, the cover having at least one projection on its underside, the at least one projection being located so as to prevent operation of the switch when the cover is in the first position and a mounting means in the form of a base plate fitted over the switch, the cover being hingedly connected to the base plate so as to be pivotal from the first position to the second position and vice versa, the safety device further comprising a means for preventing movement of the cover to the first position, when the switch is unlocked, the means for preventing movement being in the -7form of a protrusion provided in and projecting away from the cover, and a locking means comprising a pair of apertures, an aperture provided in each of the cover and the base plate, the apertures located so as to align with each other and receive a padlock or the like and thus lock the cover in the first position.
As previously indicated, the configuration of the switch and the form of the safety device must have a degree of compatibility. In this respect, the switches to which the safety device of the present invention may be applied are of various forms. Generally, the switches stand proud of the isolator for easy access.
Examples of switches compatible with the securing means include, but are not limited to, turn switches of various shapes and sizes such as key switches.
The safety device of the present invention may also be configured to accommodate an indicator. The indicator preferably being in the form of a light providing an indication as to whether the isolator is on or off. The light is preferably able to be viewed at all times and in one particular form the safety device housing includes a hole or the like which may be positioned in the base plate through which the light may be viewed when the cover is in the first position.
The present invention still further provides a safety device for a switch, the safety device comprising: a securing means capable of being moved from a first position at which the switch is inoperable to a second position at which the switch is operable; oo a means for preventing movement of the securing means to the first *•:position when the switch is on; 25 a locking means for locking the securing means in the first position; and *oooo -7/1a mounting means for mounting the safety device on a switch casing, the mounting means and the securing means being hingedly connected to allow for the securing means to be moved between its first and second positions.
The present invention will now be described with reference to the attached drawings which illustrate three embodiments of the present invention. The description of the drawings is in no way to limited the generality of the preceding description of the invention.
The drawings comprise: Figure 1 is a perspective view of a first embodiment of the safety device of the present invention.
Figure 2 is a top view showing the safety device of Figure 1 fitted to and locking an isolator switch.
15 Figure 3 is a top view showing the safety device of Figure 1 fitted to and *:0000 not locking an isolator switch.
g co co .o* coo• oo* oe coco c *oo° *oooo* Figure 4 is a perspective view of a second embodiment of the safety device of the present invention.
Figure 5 is a top view of the safety device of Figure 4 fitted to and locking an isolator switch.
Figure 6 is a top view of the safety device of Figure 4 fitted to and not locking an isolator switch.
Figure 7 is perspective view of a third embodiment of the safety device of the present invention.
Figure 8 is a top view of the safety device of Figure 7 fitted to and locking an isolator switch.
Figure 9 is a top view of the safety device of Figure 8 fitted to and not **locking an isolator switch.
Figure 10 is perspective view of a fourth embodiment of the safety device of the present invention.
Figure 11 is a top view of the safety device of Figure 10 fitted to and locking an isolator switch.
Figure 12 is a top view of the safety device of Figure 11 fitted to and not locking an isolator switch.
oaD•• Figure 13 is perspective view of a fifth embodiment of the safety device of the present invention.
Figure 14 is a top view of the safety device of Figure 13 fitted to and locking an isolator switch.
Figure 15 is a top view of the safety device of Figure 14 fitted to and not locking an isolator switch.
Each of the safety devices depicted in the attached drawings include a housing and are adapted to be mounted to an isolator casing including a switch which stands proud of the casing. Whilst the housings comprise a base plate and a cover that does not fully enclose the switch it will be appreciated that the housings may be configured to more fully enclose the switch.
The safety device in figures 1 to 3 is especially suited for mounting to a Lucas TM SB106 battery isolator switch, the safety devices in figures 4 to 6 and 7 to 9 are especially suited for mounting to Cole Hersey TM and Caterpillar TM battery isolator switches respectively, and the safety devices in figures 10 to 12 and 13 to are especially suited for mounting to Lucas T M SB110 battery isolator and Caterpillar TM battery isolator switches respectively.
o oo SFigures 1, 2 and 3 depict a safety device generally indicated by the numeral S 15 comprising a housing including a mounting means in the form of a base plate 12 incorporating a generally upstanding portion 13 and a securing means in the form of a cover 14. The cover 14 has a first portion 15 and a second portion 17 that extend at right angles to each other such that when the cover is in the first position the portion 15 locates directly above the switch 18 and the second portion 17 extends perpendicular to the first portion The base plate 12 and the cover 14 are joined at a hinge 16, the hinge 16 allows for the cover 14 to be moved between a first position at which the switch 18 is locked (see Figure 2) and a second position at which the switch 18 is operable (see Figure 3).
The base plate 12 includes an aperture 20 for the switch 18 to allow for the safety device 10 to be fitted to the isolator casing 22. In this embodiment the safety device 10 is held in place by a nut (not shown) located at the base of the switch 18, but the safety device 10 may be held in place on the isolator 22 in a variety of ways.
The first portion 15 of the cover 14 includes projections 24, 26 that are positioned so as to locate adjacent the switch 18 and thus prevent operation of the switch 18 when the cover 14 is in the first position.
The means for preventing movement of the cover 14 to the first position when the switch 18 is unlocked is also provided by projections 24, 26 mounted on the underside of the first portion 15 of the cover 14. A further projection 28 is provided on the base plate 12 to abut the switch 18 and position it to ensure that projections 24, 26 contact the switch 18 when the cover 14 is moved towards the first position. The contact between projections 24, 25 and the switch 18 prevents the cover 14 from assuming its first position and thus locking the switch 18 in the on position.
I' The locking means is provided in the form of a pair of apertures 30, 32 provided in the upstanding portion 13 of base plate 12 and the second portion 17 of the cover 14. The apertures 30, 32 align when the cover 14 is in the first position and allow for a padlock 34 or the like to be fitted to lock the safety device Figures 4, 5 and 6 depict a safety device generally indicated by the numeral 110 S: having a housing including a mounting means in the form of a base plate 112 incorporating a generally upstanding portion 113 and a securing means in the form of a cover 114. The cover 114 has a first portion 115 and a second portion 117 that extend at right angles to each other such that when the cover 114 is in its first position the first portion 15 locates directly above the switch 118 and the second portion 117 extends perpendicular to the first portion 115.
The base plate 112 and the cover 114 are joined at a hinge 116, the hinge 116 allows for the cover 114 to be moved between the first position at which the switch 118 is locked in the off position (see Figure 5) and a second position at which the switch 118 is operable (see Figure The base plate 112 includes an aperture 120 for the switch 118 and twoi bores 121, 123 to receive mounting bolts 125, 127 for mounting the safety device 110 to the isolator casing 122.
The means for preventing movement of the cover 114 to the first position when the switch 118 is on is provided in the form of a projection 124 mounted on the underside of the first portion 115 of the cover 114. The projection 124 is positioned to contact the switch 118 when the cover 114 is moved towards the first position. The contact between the projection 124 and the switch 118 prevents the cover 114 from assuming its first position and thus locking the switch 118 in the on position.
The cover 114 is adapted to receive and hold captive a portion of the switch 118, when the cover 114 is in the first position. In this respect, the second portion 117 of the cover 114 includes a channel 136 configured and located to receive a .portion of the switch 118 when the cover 114 is in the first position.
0 0.
The locking means is provided as in the first embodiment by a pair of apertures 130, 132 provided in the upstanding portion 113 of the base plate 112 and the second portion 117 of the cover 114. The apertures 130, 132 align when the o o cover 114 is in the first position and allow for a padlock 134 or the like to be fitted S0 to lock the safety device 110.
ee Figures 7, 8 and 9 depict a safety device generally indicated by the numeral 210 20 having a housing including a mounting means in the form of a base plate 212 and a securing means in the form of a cover 214. The base plate 212 and the cover 214 are joined at a hinge 216, the hinge 216 allows for the cover 214 to be moved between a first position at which the switch 218 is locked in the off position(see Figure 8) and a second position at which the switch 218 is operable (see Figure 9).
The base plate 212 includes an aperture 220 for receiving the switch 218 to allow for the safety device 210 to be fitted to the isolator 222. In this embodiment -12the safety device 210 is held in plate by mounting bolts 226 which pass through bores 221, 223 in the base plate 212.
The cover 214 locks the switch 218 when the cover 214 is in its first position by way of projection 227. The projection 227 is located on the underside of the first portion 215 of cover 214 and is located so as to be positioned adjacent the switch 218 when the cover 214 assumes its first position. The proximity of the projection 227 prevents operation of the switch 218 and thus locks the switch 218.
The means for preventing movement of the cover 214 to the first position when the switch 218 is on is provided in the form of a second projection 224 mounted on the underside of the first portion 215 of the cover 214. The second projection 224 abuts the switch 218 when the cover 214 is moved towards its first position *thus preventing the cover 214 from assuming its first position when the switch 218 is on.
The locking means is provided as in the other embodiments by apertures 232, 230 provided in the second portion 217 of the cover 214 and the upwardly projecting portion 213 of the base plate 212 respectively. In this embodiment two pairs of apertures are provided that align when the cover 214 is in the first •position and allow for two padlocks 234 (only one shown) or the like to be fitted to lock the safety device 210.
20 Figures 10, 11 and 12 depict a safety device generally indicated by the numeral 310 having a housing including a mounting means in the form of a base plate 312 and a securing means in the form of a cover 314. The base plate 312 and the cover 314 are joined at a hinge 316, the hinge 316 allows for the cover 314 to be moved between a first position at which the switch 318 is locked (see Figure 11) and a second position at which the switch 318 is operable (see Figure 12).
The base plate 312 includes an aperture 320 for receiving the switch 318 to allow for the safety device 310 to be fitted to the isolator 322. In this embodiment -13the safety device 310 is held in place by mounting bolts (not shown) which pass through bores 325 in the base plate 312.
The cover 314 locks the switch 318 in the off position when the cover 314 is in its first position by way of projection 324. The projection 324 is located on the underside of the first portion 315 of the cover 314 and is located so as to be positioned adjacent the switch 318 when the cover 314 assumes its first position.
The proximity of the projection 324 prevents operation of the switch 318 and thus locks the switch 318.
The means for preventing movement of the cover 314 to the first position when the switch 318 is on is provided by another projection 327 mounted on the underside of the cover 314. The projection 327 abuts the switch 318 in the on position when the cover 314 is moved towards its first position thus preventing the cover 314 from assuming its first position when the switch 318 is on.
o The locking means is provided as in the other embodiments by apertures provided in the second portion 317 of the cover 314 and the upwardly projecting o portion 313 of the base plate 312. In this embodiment two pairs of apertures 330, 332 are providedthat align when the cover 314 is in the first position and allow for two padlocks 334 (only one shown) or the like to be fitted to lock the safety device 310.
20 The base plate 312 is also provided with an aperture 350 to allow for the on/off S: indicator light 319 of the isolator to be easily viewed.
Figures 13, 14 and 15 depict a safety device generally indicated by the numeral 410 having a housing including a mounting means in the form of a base plate 412 incorporating a generally upstanding portion 413 and a securing means in the form of a cover 414. The cover 414 has a first portion 415 extending perpendicularly from a second portion 417.
-14- The base plate 412 and the cover 414 are joined at a hinge 416, the hinge 416 allows the cover 414 to be moved between the first position at which the switch 418 is locked (see Figure 15) and a second position at which the switch 418 is operable (see Figure 14). The base plate 412 includes an aperture 420 for the switch 418 and two bores 421, 423 to receive mounting bolts (not shown) for mounting the safety device 410 to the isolator 422.
The means for preventing movement of the cover 414 to the first position when the switch 418 is on is provided in the form of a projection 424 mounted on the underside of the first portion 415 of the cover 414. The projection 424 is positioned to contact the switch 418 when the cover 414 is moved towards the first position. The contact between the projection 424 and the switch 418 prevents the cover 414 from assuming its first position and thus locking the switch 418 when the switch 418 is in the on position.
The cover 414 is adapted to receive and hold captive a portion of the switch 418, when the cover 414 is in the first position. In this respect, the second portion 417 of the cover 414 includes a channel or gap 436 located to receive a portion of the *switch 418 when the cover 414 is in the first position and the switch is off.
To further secure the switch 418 when the cover 414 is in the first position the 0 •upstanding portion 413 of the base plate 412 is also fitted with barrier member in the form of an arm 436 which projects over the top of the switch 418 to prevent or S0: at least limit the movement of the switch, which in this embodiment is provided as S•a removable switch such as a key, from being moved in a substantially upward direction.
The locking means is provided as in the first embodiment by two apertures 430, 432 provided in the upstanding portion 413 of the base plate 412 and the second portion 417 of the cover 414. The apertures 430, 432 align when the cover 414 is in the first position and allow for a padlock 434 or the like to be fitted to lock the safety device 410.
It will be appreciated that further modifications and adaptations apparent to one skilled in the art are to be encompassed in the scope of the present invention.
*o
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Claims (23)
1. A safety device for a switch, the safety device comprising: a securing means capable of being moved from a first position at which the switch is inoperable to a second position at which the switch is operable; a means for preventing movement of the securing means to the first position when the switch is on; a locking means for locking the securing means in the first position; and a mounting means for mounting the safety device on a switch casing, the mounting means and the securing means being hingedly connected to allow for the securing means to be moved between its first and second positions.
2. A safety device according to claim 1 wherein the safety device is provided as a housing. o: o i: 15
3. A safety device according to claim 2 wherein the housing at least partially surrounds the switch.
A safety device according to any one of claims 1 to 3 wherein the securing means is formed as a cover which extends at least partially over the switch when in its first position.
5. A safety device according to claim 4 wherein the cover is adapted to lock the switch by limiting or preventing the movement of the switch. cOO•
6. A safety device according to claim 4 or 5 wherein the cover is adapted to abut or locate in proximity to the switch and thus limit or prevent the movement of the switch. -17-
7. A safety device according to any one of claims 4 to 6 wherein the cover further comprises at least one projection that abuts or locates in proximity to the switch when the cover is in the first position.
8. A safety device according to claim 7 wherein the at least one projection extends from the underside of the cover.
9. A safety device according to claim 4 or 5 wherein the cover is adapted to limit or prevent the movement of the switch by receiving or holding captive at least a portion of the switch.
A safety device according to claim 9 wherein the cover further comprises a channel or space that receives or holds captive at least a portion of the switch.
11. A safety device according to any one of the preceding claims wherein the locking means is adapted to lock the safety device via the securing means and the mounting means.
12. A safety device according to claim 11 wherein the locking means comprises a padlock or the like which passes through the securing means and the mounting means thus locking the safety device.
:13. A safety device according to any one of the preceding claims further *comprising a barrier means which is located above the switch and prevents upward movement of the switch.
14. A safety device according to claim 13, when dependent directly or indirectly on claim 2, wherein the barrier means is provided as part of the housing.
A safety device according to any one of the preceding claims which is adapted to accommodate an indicator light. -18-
16. A safety device according to claim 15, when dependent directly or indirectly on claim 2, wherein the housing incorporates an aperture to receive the indicator light.
17. A safety device according to claim 1 substantially as herein described with reference to any one of figures 1 to
18. A safety device for a switch comprising a housing having a securing means capable of being moved from a first position at which the switch is inoperable to a second position at which the switch is operable, a means for preventing movement of the securing means to the first position when the switch is on, a locking means for locking the securing means in the first position, and a mounting means for mounting the safety device, the mounting means and the securing means being hingedly connected to allow for the securing means to be moved between its first and second positions.
19. A safety device for a switch which is adapted to be mounted to an isolator, the safety device comprising a securing means in the form of a housing having a cover passing over the switch, the cover having at least one projection on its underside, the at least one projection being located so as to prevent operation of the switch when the cover is in a first position and a ~mounting means in the form of a base plate fitted over the switch, the cover being hingedly connected to the base plate so as to be pivotal from the first position to a second position and vice versa, the safety device further comprising a means for preventing movement of the cover to the first position, when the switch is unlocked, the means for preventing movement being in the form of a protrusion provided in and projecting away from the 25 cover, and a locking means comprising a pair of apertures, an aperture provided in each of the cover and the base plate, the apertures located so as to align with each other and receive a padlock or the like and thus lock the cover in the first position.
A safety device according to any one of the preceding claims provided integrally with an isolator. -19-
21. A safety device according to any one of claims 1 to 19 adapted for fitting to a starter motor switch.
22. An isolator fitted with the safety device according to any one claims 1 to
23. An starter motor fitted with a safety device according to any one of claims 1 to Dated this Sixteenth day of February 2004. Irwin Hubert Harrison Applicant Wray Associates Perth, Western Australia Patent Attorneys for the Applicant *e *0 So
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU59384/00A AU772019B2 (en) | 1995-08-28 | 2000-09-12 | Safety device for a switch |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPN5046 | 1995-08-28 | ||
| AUPN6893 | 1995-11-30 | ||
| AU64328/96A AU6432896A (en) | 1995-08-28 | 1996-08-28 | Safety device for a switch |
| AU59384/00A AU772019B2 (en) | 1995-08-28 | 2000-09-12 | Safety device for a switch |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU64328/96A Division AU6432896A (en) | 1995-08-28 | 1996-08-28 | Safety device for a switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU5938400A AU5938400A (en) | 2001-01-04 |
| AU772019B2 true AU772019B2 (en) | 2004-04-08 |
Family
ID=32097274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU59384/00A Expired AU772019B2 (en) | 1995-08-28 | 2000-09-12 | Safety device for a switch |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU772019B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2192060A (en) * | 1936-08-14 | 1940-02-27 | Westinghouse Electric & Mfg Co | Locking device |
| US2300102A (en) * | 1941-01-04 | 1942-10-27 | Colt S Mfg Co | Cover interlock for electrical casings |
| US3511947A (en) * | 1968-01-03 | 1970-05-12 | Mc Graw Edison Co | Combination safety lock-switch mechanism for power tool |
-
2000
- 2000-09-12 AU AU59384/00A patent/AU772019B2/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2192060A (en) * | 1936-08-14 | 1940-02-27 | Westinghouse Electric & Mfg Co | Locking device |
| US2300102A (en) * | 1941-01-04 | 1942-10-27 | Colt S Mfg Co | Cover interlock for electrical casings |
| US3511947A (en) * | 1968-01-03 | 1970-05-12 | Mc Graw Edison Co | Combination safety lock-switch mechanism for power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5938400A (en) | 2001-01-04 |
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