CA2088298A1 - Switching step observation system - Google Patents
Switching step observation systemInfo
- Publication number
- CA2088298A1 CA2088298A1 CA 2088298 CA2088298A CA2088298A1 CA 2088298 A1 CA2088298 A1 CA 2088298A1 CA 2088298 CA2088298 CA 2088298 CA 2088298 A CA2088298 A CA 2088298A CA 2088298 A1 CA2088298 A1 CA 2088298A1
- Authority
- CA
- Canada
- Prior art keywords
- operator
- mirror
- operator station
- locomotive
- rear view
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
- B61C17/04—Arrangement or disposition of driving cabins, footplates or engine rooms; Ventilation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/002—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles specially adapted for covering the peripheral part of the vehicle, e.g. for viewing tyres, bumpers or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Multimedia (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
SWITCHING STEP OBSERVATION SYSTEM
Abstract of the Disclosure A switching step observation system allows an operator in the operator station of a train locomotive having a full width nose cab to observe any activity on and around the switching steps at the front of the locomotive, even though the full width nose cab obscures the direct view of the switching steps. The system provides a small secondary mirror which is visible in the large rear view mirror which is standard equipment already present adjacent to the operator station.
This small secondary mirror is mounted in such a position that it reflects an image of the switching steps to the operator by way of the large rear view mirror. Preferably, the small secondary mirror is mounted to be adjustable about two axes, so that the operator can easily adjust the mirror to obtain the optimum view. If switching steps and a rear view mirror are present on both sides of the locomotive, the system may be duplicated on both sides of the locomotive, so an operator can see both sets of switching steps from one position.
Abstract of the Disclosure A switching step observation system allows an operator in the operator station of a train locomotive having a full width nose cab to observe any activity on and around the switching steps at the front of the locomotive, even though the full width nose cab obscures the direct view of the switching steps. The system provides a small secondary mirror which is visible in the large rear view mirror which is standard equipment already present adjacent to the operator station.
This small secondary mirror is mounted in such a position that it reflects an image of the switching steps to the operator by way of the large rear view mirror. Preferably, the small secondary mirror is mounted to be adjustable about two axes, so that the operator can easily adjust the mirror to obtain the optimum view. If switching steps and a rear view mirror are present on both sides of the locomotive, the system may be duplicated on both sides of the locomotive, so an operator can see both sets of switching steps from one position.
Description
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SWITCHING STEP OBSERVATION SYSTEM
- Backqround of the Invention Field of the Invention The present invention relates to train locomotives, and in particular to observation systems to allow the operator to see activity around the locomotive from the locomotive operator station.
Description of the Related Art The design of many train locomotives produced today includes a full width nose cab, that is, a cab which extends across the full width of the locomotive. Many such locomotives also include sets of exterior steps on one or both sides of the front of the locomotive, which are commonly referred to as switching st~ps since they are used primarily during switching operations.
The problem is that a full width nose cab can obscure the direct view to the switching steps by a locomotive operator in the operator station in the cab. This in turn means that an operator may not be able to see a person boarding the locomotive or standing on the steps.
~ There have been several attempts to solve this problem.
The simplest proposal is to alter the obscuring cab geometry by shaving away the portions of the cab that interfere with the direct view from the operator station to the switching 25 steps. These attempts ha~e bee~ largely unsuccessful because the amount of the cab which must be removed leave~
insufficient interior space to house the reguired functions.
Another concept has been to mount a mirror to the cab above the windshield to provide a reflected "bird's eyel' image of the front area. This has several disadvantages. Since it points down ~rom above rather than along the locomotive, such -a mirror provides only a glimpse of the areas adjacen~ to the i switching steps. The ~'bird~s eye" position of the mirror also makes ~t difficult to see hand signals from a person standing on the steps. Even if the hand signal~ can be seen, the single mirror inverts the image, making it dif~icult to interpret the signals.
i Yet another idea has been to use a prism to produce a r-~r~ctcd im~ge o2 the ~orward are~. Whil- ~uch ~ device . : . ., ., .. , , , " , . . . ~, , , " . , ., , j ,, ~-: 2~8~2~
holds theoretical promise, it has not been well developed to date. It also is l~kely to be costly, and could be awkward to mount on the locomotive.
Summary of the Invention Accordingly, it is the object of the present invention to provide an inexpensive, easily added system to allow a locomotive operator in the operator station to easily observe the switching steps and the area around them. It is a further object of the invention to provide a system such that hand signals from a person on or near the switching steps can easily be seen and interpreted.
These objects and other~ are achieved according to the present invention by providing a small secondary observation mirror which is visible in the large rear view mirror which is standard equipment already present adjacent to the operator station. This small secondary mirror is mounted in such a l~ position that it reflects an image of the switching steps to the operator by way of the large rear view mirror.
3 Preferably, the small secondary mirror is mounted to be adjustable about two axes, so that the operator can easily adjust the mirror to obtain the optimum view.
Such a structure has several advantages. This type of mirror and mounting are common and therefore very inexpensive.
The mirror reflects an image along the side of the locomotive, not down from above, so that the operator can see what is happening around the switching steps, not just on them. The double re~lection also means that the i~age is inverted twice, and therefore appears to the operator as a natural view of the step and nearby area. This makes it very easy for the ~ 30 operator to interpret hand signals, since they appear exactly .l as they would if seen directly.
`~ Finally, so~e locomotives have switching steps on both ide~, as well as rear view mirrors on both sides of the locomotive which are visible by the operator. In such cases, this system can be duplicated on both sides of the locomotive.
~ This has the distinct advantage of allowing th~ operator to ;¦ ~e~ activity on and around both sets of ~witching 8tep5 :
, .
''l .
,.. .. . . .
.,;. , . "
,', ~ . , ~ . : . .
SWITCHING STEP OBSERVATION SYSTEM
- Backqround of the Invention Field of the Invention The present invention relates to train locomotives, and in particular to observation systems to allow the operator to see activity around the locomotive from the locomotive operator station.
Description of the Related Art The design of many train locomotives produced today includes a full width nose cab, that is, a cab which extends across the full width of the locomotive. Many such locomotives also include sets of exterior steps on one or both sides of the front of the locomotive, which are commonly referred to as switching st~ps since they are used primarily during switching operations.
The problem is that a full width nose cab can obscure the direct view to the switching steps by a locomotive operator in the operator station in the cab. This in turn means that an operator may not be able to see a person boarding the locomotive or standing on the steps.
~ There have been several attempts to solve this problem.
The simplest proposal is to alter the obscuring cab geometry by shaving away the portions of the cab that interfere with the direct view from the operator station to the switching 25 steps. These attempts ha~e bee~ largely unsuccessful because the amount of the cab which must be removed leave~
insufficient interior space to house the reguired functions.
Another concept has been to mount a mirror to the cab above the windshield to provide a reflected "bird's eyel' image of the front area. This has several disadvantages. Since it points down ~rom above rather than along the locomotive, such -a mirror provides only a glimpse of the areas adjacen~ to the i switching steps. The ~'bird~s eye" position of the mirror also makes ~t difficult to see hand signals from a person standing on the steps. Even if the hand signal~ can be seen, the single mirror inverts the image, making it dif~icult to interpret the signals.
i Yet another idea has been to use a prism to produce a r-~r~ctcd im~ge o2 the ~orward are~. Whil- ~uch ~ device . : . ., ., .. , , , " , . . . ~, , , " . , ., , j ,, ~-: 2~8~2~
holds theoretical promise, it has not been well developed to date. It also is l~kely to be costly, and could be awkward to mount on the locomotive.
Summary of the Invention Accordingly, it is the object of the present invention to provide an inexpensive, easily added system to allow a locomotive operator in the operator station to easily observe the switching steps and the area around them. It is a further object of the invention to provide a system such that hand signals from a person on or near the switching steps can easily be seen and interpreted.
These objects and other~ are achieved according to the present invention by providing a small secondary observation mirror which is visible in the large rear view mirror which is standard equipment already present adjacent to the operator station. This small secondary mirror is mounted in such a l~ position that it reflects an image of the switching steps to the operator by way of the large rear view mirror.
3 Preferably, the small secondary mirror is mounted to be adjustable about two axes, so that the operator can easily adjust the mirror to obtain the optimum view.
Such a structure has several advantages. This type of mirror and mounting are common and therefore very inexpensive.
The mirror reflects an image along the side of the locomotive, not down from above, so that the operator can see what is happening around the switching steps, not just on them. The double re~lection also means that the i~age is inverted twice, and therefore appears to the operator as a natural view of the step and nearby area. This makes it very easy for the ~ 30 operator to interpret hand signals, since they appear exactly .l as they would if seen directly.
`~ Finally, so~e locomotives have switching steps on both ide~, as well as rear view mirrors on both sides of the locomotive which are visible by the operator. In such cases, this system can be duplicated on both sides of the locomotive.
~ This has the distinct advantage of allowing th~ operator to ;¦ ~e~ activity on and around both sets of ~witching 8tep5 :
, .
''l .
,.. .. . . .
.,;. , . "
,', ~ . , ~ . : . .
2~88~9~
without having to ~ove around the cab. None of the prior techniques discussed a~ove can accomplish this, since the cab itself would normally interfere.
Brief DescriDtion of the Drawina The single figure is a side view of part of a locomotive equipped with a switching step observation system according to the pres~nt invention. ~ -~
petailed Description of the Preferred Embodiments The single figure depicts the front part of a locomotive 10. (Throughout this specification, including in the claims, "front", "rear~ and the like are used for convenience only.
They are intended merely to provide a convenient reference, and are in no way intended to limit the scope of the claims or the invention.) The locomotive 10 includes a full width nose cab 12, extending across substantially the full width thereof.
An operator station 14 is positioned inside the cab 12.
The locomotive 10 includes a set of switching steps 16 at the front thereof, ahead of the cab 12. The cab 12 obscures the direct view line of site from an operator 18 in the operator station 14 to the switching steps 16.
Standard equipment for the locomotive 10 also normally includes an adjustably mounted large rear view mirror 20.
Thi~ rear view mirror 20 normally allows the operator 18 to see back along the ~ide of the locomotive 10 from the operator -~ -~
station 14.
The locomotive 10 sometimes is provided with switching steps 16 and a rear view mirror 20 on both sides of the locomotive. In some such instances, the rear view mirrors 20 on both side~ of the locomotive 10 are vi~ible by the operator 18 from a single location in the operator station 14.
However, the direct view to both sets of switching steps 16 is always obscured by the cab 12.
According to the present invention, a small secondary observation mirror 22 is mounted to the locomo~ive by a mounting mechanism 24. The secondary mirror is positioned to reflec~ an image of the switching steps 16 which is visible by the operator 18 in the large rear view mirror 20, as indicated - , ; . ' -: .
'.' : : . ~.
;:
~-` 2~8~2~g by the line of sight A. The mounting mechanism 24 preferably is designed to allow adjustment of the secondary mirror 22 about two axes, to allow for variations in the height of the operator and the adjustment of the lar~e rear view mirror 20.
The secondary mirror 22 should be positioned so that the image in it is easily visible in the large rear view mirror 20, but so that it also does not obstruct a significant portion of the rear view normally visible in the rear view mirror 20. This can readily be accomplished by positioning the secondary mirror 22 below the large rear view mirror 20 and towards the r~ar of the operator station 14. ~he part of the rear view normally visible in this part of the rear view mirror 20 is the side of the locomotive 10 itself, so that obstruction of this portion of the rear view is of no consequence.
If the locomotive lO has a second set of switching step~
16 and a second rear view mirror 20 on the other side of the locomotive, a second small observation mirror 22 and mounting mechanism 24 can be provided to allow an operator 18 to view ~oth sets of switching steps 16.
In use, the operator 18 first adjusts the large rear view ~ mirror 20 to reflect the desired rear view, and then adjusts r, the smaller secondary mirror 22 to provide a clear view of the switching steps 16 and the ground adjacent thereto. The operator then can easily check the area around the switching steps 16 simply by glancing in the rear-vi~w mirror 20. Since the image is twice reflected, it appears as a normal image, so the operator also can easily respond to hand signals or the like from anyone on or around the switching steps 16.
While the invention has been described in ` conjunction with a specific embodiment,-it is to be understood 3 that many alternatives, modifications and variations will be ', apparent to those skilled in the art in light of the foregoing description. Accordingly, this invention i intended to embrace all ~uch alternatives, modification~ and variations which fall within the spirit and scope of the ~ppended claims.
, 4 ~!
~, .
''.' ' : ' ' :, ' ' , . . ;,. . .
... , . . ~
~, , ' ',' ' ' ' ' ' : ~ ' '
without having to ~ove around the cab. None of the prior techniques discussed a~ove can accomplish this, since the cab itself would normally interfere.
Brief DescriDtion of the Drawina The single figure is a side view of part of a locomotive equipped with a switching step observation system according to the pres~nt invention. ~ -~
petailed Description of the Preferred Embodiments The single figure depicts the front part of a locomotive 10. (Throughout this specification, including in the claims, "front", "rear~ and the like are used for convenience only.
They are intended merely to provide a convenient reference, and are in no way intended to limit the scope of the claims or the invention.) The locomotive 10 includes a full width nose cab 12, extending across substantially the full width thereof.
An operator station 14 is positioned inside the cab 12.
The locomotive 10 includes a set of switching steps 16 at the front thereof, ahead of the cab 12. The cab 12 obscures the direct view line of site from an operator 18 in the operator station 14 to the switching steps 16.
Standard equipment for the locomotive 10 also normally includes an adjustably mounted large rear view mirror 20.
Thi~ rear view mirror 20 normally allows the operator 18 to see back along the ~ide of the locomotive 10 from the operator -~ -~
station 14.
The locomotive 10 sometimes is provided with switching steps 16 and a rear view mirror 20 on both sides of the locomotive. In some such instances, the rear view mirrors 20 on both side~ of the locomotive 10 are vi~ible by the operator 18 from a single location in the operator station 14.
However, the direct view to both sets of switching steps 16 is always obscured by the cab 12.
According to the present invention, a small secondary observation mirror 22 is mounted to the locomo~ive by a mounting mechanism 24. The secondary mirror is positioned to reflec~ an image of the switching steps 16 which is visible by the operator 18 in the large rear view mirror 20, as indicated - , ; . ' -: .
'.' : : . ~.
;:
~-` 2~8~2~g by the line of sight A. The mounting mechanism 24 preferably is designed to allow adjustment of the secondary mirror 22 about two axes, to allow for variations in the height of the operator and the adjustment of the lar~e rear view mirror 20.
The secondary mirror 22 should be positioned so that the image in it is easily visible in the large rear view mirror 20, but so that it also does not obstruct a significant portion of the rear view normally visible in the rear view mirror 20. This can readily be accomplished by positioning the secondary mirror 22 below the large rear view mirror 20 and towards the r~ar of the operator station 14. ~he part of the rear view normally visible in this part of the rear view mirror 20 is the side of the locomotive 10 itself, so that obstruction of this portion of the rear view is of no consequence.
If the locomotive lO has a second set of switching step~
16 and a second rear view mirror 20 on the other side of the locomotive, a second small observation mirror 22 and mounting mechanism 24 can be provided to allow an operator 18 to view ~oth sets of switching steps 16.
In use, the operator 18 first adjusts the large rear view ~ mirror 20 to reflect the desired rear view, and then adjusts r, the smaller secondary mirror 22 to provide a clear view of the switching steps 16 and the ground adjacent thereto. The operator then can easily check the area around the switching steps 16 simply by glancing in the rear-vi~w mirror 20. Since the image is twice reflected, it appears as a normal image, so the operator also can easily respond to hand signals or the like from anyone on or around the switching steps 16.
While the invention has been described in ` conjunction with a specific embodiment,-it is to be understood 3 that many alternatives, modifications and variations will be ', apparent to those skilled in the art in light of the foregoing description. Accordingly, this invention i intended to embrace all ~uch alternatives, modification~ and variations which fall within the spirit and scope of the ~ppended claims.
, 4 ~!
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''.' ' : ' ' :, ' ' , . . ;,. . .
... , . . ~
~, , ' ',' ' ' ' ' ' : ~ ' '
Claims (11)
1. A switching step observation system for a train locomotive having an operator station and at least one set of switching steps forward of the operator station, comprising:
a. rear view mirror means easily visible by an operator in the operator station for allowing the operator to see generally to the rear of the operator station along the side of the locomotive; and b. small observation mirror means for reflecting an image of the at least one set of switching steps to said rear view mirror means such that said image is easily visible in said rear view mirror means by an operator in the operator station.
a. rear view mirror means easily visible by an operator in the operator station for allowing the operator to see generally to the rear of the operator station along the side of the locomotive; and b. small observation mirror means for reflecting an image of the at least one set of switching steps to said rear view mirror means such that said image is easily visible in said rear view mirror means by an operator in the operator station.
2. The switching step observation system of claim 1, wherein said rear view mirror means comprises a large mirror adjustably mounted adjacent to and towards the front of the operator station and wherein said small observation mirror means comprises a small mirror adjustably mounted adjacent to and towards the rear of the operator station.
3. The switching step observation system of claim 2, wherein said small mirror is mounted lower than said large mirror.
4. The switching step observation system of claim 2, wherein said small observation mirror means further comprises mounting means for adjustably mounting said small mirror, said mounting means allowing adjustment of said small mirror about two axes.
5. The switching step observation system of claim 1, wherein said locomotive has a second set of switching steps forward of the operator station on the side of the locomotive opposite from said first set of switching steps, and further comprising:
a. second rear view mirror means easily visible by an operator in the operator station for allowing the operator to see generally to the rear of the operator station along the same side of the locomotive as the second set of switching steps; and b. second small observation mirror means for reflecting a second image of the second set of switching steps to said second rear view mirror means such that said second image is easily visible in said second rear view mirror means by an operator in the operator station.
a. second rear view mirror means easily visible by an operator in the operator station for allowing the operator to see generally to the rear of the operator station along the same side of the locomotive as the second set of switching steps; and b. second small observation mirror means for reflecting a second image of the second set of switching steps to said second rear view mirror means such that said second image is easily visible in said second rear view mirror means by an operator in the operator station.
6. The switching step observation system of claim 1, wherein said locomotive further comprises a nose cab enclosing said operator station, said nose cab obscuring the direct view from said operator station to said at least one set of switching steps.
7. A method of using the switching step observation system of claim 1, comprising:
a. adjusting said small observation mirror means so the image of said at least one set of switching steps and the ground adjacent thereto is clearly visible in said rear view mirror means from said operator station; and b. periodically checking said image to determine whether a person is present in the vicinity of said at least one set of switching steps.
a. adjusting said small observation mirror means so the image of said at least one set of switching steps and the ground adjacent thereto is clearly visible in said rear view mirror means from said operator station; and b. periodically checking said image to determine whether a person is present in the vicinity of said at least one set of switching steps.
8. The method of claim 7, further comprising the additional step of observing and responding to hand signals from a person on said at least one set of switching steps.
9. A switching step observation system for a train locomotive having an operator station and at least one set of switching steps forward of the operator station, comprising:
a. a rear view mirror adjustably mounted to said locomotive to be easily visible by an operator in the operator station to allow the operator to see generally to the rear of the operator station along the side of the locomotive;
b. a small observation mirror for reflecting an image of the at least one set of switching steps to said rear view mirror such that said image is easily visible in said rear view mirror by an operator in the operator station; and c. mounting means for adjustably mounting said small observation mirror adjacent to and towards the rear of the operator station such that it is adjustable about two axes and is positioned generally below said rear view mirror.
a. a rear view mirror adjustably mounted to said locomotive to be easily visible by an operator in the operator station to allow the operator to see generally to the rear of the operator station along the side of the locomotive;
b. a small observation mirror for reflecting an image of the at least one set of switching steps to said rear view mirror such that said image is easily visible in said rear view mirror by an operator in the operator station; and c. mounting means for adjustably mounting said small observation mirror adjacent to and towards the rear of the operator station such that it is adjustable about two axes and is positioned generally below said rear view mirror.
10. The switching step observation system of claim 9, wherein said locomotive has a second set of switching steps forward of the operator station on the side of the locomotive opposite from said first set of switching steps, and further comprising:
a. a second rear view mirror adjustably mounted to said locomotive to be easily visible by an operator in the operator station to allow the operator to see generally to the rear of the operator station along the same side of the locomotive as the second set of switching steps;
b. a second small observation mirror for reflecting a second image of the second set of switching steps to said second rear view mirror such that said second image is easily visible in said second rear view mirror by an operator in the operator station; and c. second mounting means for adjustably mounting said second small observation mirror adjacent to and towards the rear of the operator station such that it is adjustable about two axes and is positioned generally below said second rear view mirror.
a. a second rear view mirror adjustably mounted to said locomotive to be easily visible by an operator in the operator station to allow the operator to see generally to the rear of the operator station along the same side of the locomotive as the second set of switching steps;
b. a second small observation mirror for reflecting a second image of the second set of switching steps to said second rear view mirror such that said second image is easily visible in said second rear view mirror by an operator in the operator station; and c. second mounting means for adjustably mounting said second small observation mirror adjacent to and towards the rear of the operator station such that it is adjustable about two axes and is positioned generally below said second rear view mirror.
11. The invention as defined in any of the preceding claims including any further features of novelty disclosed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2088298 CA2088298A1 (en) | 1993-01-28 | 1993-01-28 | Switching step observation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2088298 CA2088298A1 (en) | 1993-01-28 | 1993-01-28 | Switching step observation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2088298A1 true CA2088298A1 (en) | 1994-07-29 |
Family
ID=4151057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2088298 Abandoned CA2088298A1 (en) | 1993-01-28 | 1993-01-28 | Switching step observation system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2088298A1 (en) |
-
1993
- 1993-01-28 CA CA 2088298 patent/CA2088298A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |