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Publication numberUS3862500 A
Publication typeGrant
Publication dateJan 28, 1975
Filing dateApr 17, 1973
Priority dateApr 20, 1972
Also published asCA997553A1, DE2319984A1
Publication numberUS 3862500 A, US 3862500A, US-A-3862500, US3862500 A, US3862500A
InventorsWibom Gustaf Hakan Oskar
Original AssigneeAga Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plumb- or inclination-setting device
US 3862500 A
Abstract
A plumb- or inclination-setting device for an apparatus such as a driling machine, crane, platform or the like, having a member which is tiltable in relation to the horizontal plane, said member being regulated from an operating position located at a distance from the tiltable member, comprises a housing attachable to the tiltable member. In the housing there is a level illuminated by a lamp or mirror and a means for magnification and reproduction of the level, so that convenient viewing of the enlarged image of this with the naked eye is permitted from the operating position. The housing has an aiming device movable in relation to and fixable to the housing, which aiming device is arranged for such advance setting that when the image of the level bubble is centered in the level housing, the tiltable member adopts a predetermined direction in both the horizontal and the vertical plane.
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United States Patent 11 1 Wibom [451 Jan. 28, 1975 PLUMB ()R lNCLlNATlON-SETTING DEVICE [75] Inventor: Gustaf Hakan ()skar Wibom,

[30] Foreign Application Priority Data Apr. 20. 1972 Sweden 5208/72 Mar. 8, 1973 Sweden 7301784 [52] US. Cl 33/333, 33/348, 33/352, 240/644 [51] Int. Cl ..G01c 9/28, G010 9/32 [58] Field of Search 33/310, 313, 314, 333, 33/348, 349, 370, 371, 352; 116/114 L; 240/644 {56] References Cited UNITED STATES PATENTS 2,187,367 l/19l0 Smith 33/313 2 313.734 3/1943 Crane et al. 33/348 2,570,122 10/1951 Heckert et al. 33/333 2,835,220 4/1958 Rardin 33/333 2,993,281 7/1961 Dock 33/384 FOREIGN PATENTS OR APPLICATIONS 965,967 2/1950 France 33/348 1,087,771 9/1954 France 33/348 Primary Examiner-Richard E. Aegerter Aszs'islun! lituminen-Richard R. Stearns Attorney, Agent. or FirmLerner, David, Littenberg & Samuel [57] ABSTRACT A plumbor inclination-setting device for an apparasash a esltilfiaamaehine ne P at r or t liliefhaving a member which is tiltable in relation to the horizontal plane, said member being regulated from an operating position located at a distance from the tiltable member, comprises a housing attachable to the tiltable member. In the housing there is a level illuminated by a lamp or mirror and a means for magnification and reproduction of the level, so that convenient viewing of the enlarged image of this with the naked eye is permitted from the operating position. The housing has an aiming device movable in relation to and fixable to the housing, which aiming device is arranged for such advance setting that when the image of the level bubble is centered in the level housing, the tiltable member adopts a predetermined direction in both the horizontal and the vertical plane.

13 Claims, 8 Drawing Figures PATENTED JANZ 81975 SHEET 3 OF 5 Fig. 3

PATENTEU JAN 2 8 i975 SHEET 4 0F 5 Fig. 4

PLUMB- OR INCLlNATION-SETTING DEVICE DESCRIPTION OF INVENTION The present invention refers to a plumbor inclination-setting device which can be used in many different types of apparatuses such as drilling machines, cranes, platforms etc.

Many attempts have been made to increase the accuracy in positioning for drilling of, inter alia, blasting holes. With the method used heretofore which is based on the drillers empirical judgement of the vertical or plumb line, it is not possible to attain better results than approximately 3 per cent deviation. This will increase the number and the length of holes, the drill-hole diameters as well as explosives consumption. This in turn leads to inferior economy.

The drillers current difficulties with setting of the drilling platform also involves loss of time since it is necessary for him to check the angle from other directions than the plane he sees from his operating position.

It has now been stated as desirable to have a deviation of less than one per cent from the drilling angle specified for the drilling.

One object of the invention is to obtain a plumbor inclination-setting device which has great accuracy and reliability, is simple to handle and use, has a simple construction and is easily adopted to different types of apparatuses being adjustable primarily as concerns their inclination relative to the horizontal plane.

According to the invention there is accomplished a plumbor inclination-setting device for an apparatus comprising a member which is tiltable in the vertical plane such as a drilling machine, crane, platform, etcetera, the inclination of said tiltable member in relation to the horizontal plane being regulated from an operating position located at a distance from the tiltable member, substantially characterized by a housing attachable to the tiltable member, which housing has at least one level illuminated by a lamp, mirror or the like and means for magnification and reproduction of the level. so that convenient viewing of the enlarged image of this with the naked eye is permitted from the operating position.

In practise it is preferred that the housing is rotatably and/or displaceably attached to the tiltable member or to a bar parallel with the longitudinal axis thereof.

A graduate scale is preferably used for setting of the housing in relation to the tiltable member and there is in many applications also a second graduate scale in a plane at right angles to the first one.

The part of the housing provided with means for reproduction of the level is preferably rotatable in relation to the part containing the level, so that the enlarged image of the level always is visible from the operating position.

In one preferred modified embodiment of the invention the housing has an aiming device movable in relation to and fixable to the housing, which aiming device is arranged for such advance setting that when the image of the level bubble is centered in the level housing the tiltable member, e.g. the feed beam, adopts a predetermined direction in both the horizontal and the vertical plane.

Further features of the invention will be apparent from the following description of some embodiments thereof. The description is made in connection with the attached drawings in which:

FIG. 1 is a sectional view of a device according to the invention.

FIG. 2 is a perspective view ofa drilling machine provided with a device according to FIG. 1.

FIG. 3 is a section of modified embodiment.

FIG. 4 is a view of a device provided with an associated direction-finding instrument.

FIG. 5 is a plan view of an aiming device provided with aligning means for the direction-finding instrument.

FIGS. 6-8 illustrate different steps when using the device and instrument combination according to FIGS. 4 and 5.

Referring to FIGS. 1 and 2 a housing 11 contains one or more levels 1, Le, transparent, liquid-filled containers of tube or box type with a gas bubble or metal droplet which is/are illuminated or mirrored from below, from above or from the side counted from the marking made in the level which indicates the position of the bubble when the level is in the horizontal or other specific position. By means of suitable lenses 2 or other system the bubble is reflected and the position marking appropriately enlarged, e.g. 10 times, on an inclined plane or an inclined mirror 3 and focussing screen 4. The housing with its contents is provided with a means 6 permitting setting of a predetermined angle in one plane such as an inclination angle relative to the horizontal plane, and setting of another angle in a plane at right angles thereto such as a certain direction in the horizontal plane. The housing is attached to for instance the feed beam of a drilling machine 12 of the kind illustrated in FIG. 2.

Since the driller requires the assistance of the instrument only for a short time at each drill hole the lamp 7 necessary for the illumination needs only small batteries as its power source.

The degree of magnification is decided by the demands for viewability from the drillers operating position. In order for the driller to be able to check the inclination of the drilling platform after commencement of drilling the upper part 11a of the device with mirror/focussing screen or inclined plane is rotatable. Normally the device is mounted at eye level on the drilling platform.

In certain cases, however, the ground is so hilly or rocky that it is difficult to see the instrument from the drillers operating position. In view of such eventualities the device as shown in FIG. 2 is movable along a bar 8 parallel with the drilling rod 13.

A device of the kind described below enabling the longitudinal axis of the instrument to be rapidly adjusted so as to become parallel with the drilling rod may also be used.

In those cases where particular accuracy is called for the instrument can be attached directly to the drilling machine. This is preferred when the machine is handheld or when the feed beam, as frequently happens, is curved.

The device is dust-protected and preferably vibrationfree, and is suspended and protected from blows and jolts by the protective casing 11. Specifically, as shown in FIG. 3, the focusing screen 4 is surrounded by a screen or protective hood 11a for sunbeams, so that viewing of the enlarged image of the level in sunny weather is facilitated.

For inclined hole drilling the device can be mounted pivotably, possibly with a motor, on a pole (not shown), so that the device itself works as a plummet. Between the device and the pole is an adjustable and graduated means which allows angular setting of the drilling unit around the horizon." The aiming of the horizontal direction of the drill holes is regulated by observation of the built-in compass 5. The device will rotate around its axis when the feed beam is reset. At the same time, the upper part of the casing 11 can be rotated either manually or mechanically, possibly with a motor, so that the level is visible in all positions from the operating position. The combined level and pendula arrangement provides accurate control of both direction and angle to the horizontal plane. The compass housing can be rotatable from outside.

The device is used in the following manner: To begin with, the graduated scale 6 is set at the wanted angle of inclination, whereafter the feed beam 9 (FIG. 2) is aligned in plane with the aid of the compass or other aligning device of the kind described below. The angular relationship of the feed beam 9 is then adjusted with the aid of the level 1. If the device does not adopt the vertical position automatically this is adjusted with the built-in electric motor 30.

In this type of drilling operation it is often required that several drill holes be drilled along, for instance, a rock cutting and that these holes be parallel. This is achieved according to the invention in the following manner;

One or two angular prisms (not shown) are mounted with one axis at right angles to the drilling rod and feed beam, so that if the device is turned around the said axis a plane parallel with the drilling rod is defined. The prism or prisms are then in their turn individually rotatable around axes parallel with the former and can by means of wires and worm gears be maneuvered by the driller from his operating position. The image in the prisms is enlarged and reflected in the same manner as in the previously described apparatus. This equipment includes staking poles, possibly illuminated, such as by lighted neon tubes therewithin, provided with a graduated setting facility.

When using the equipment the two staking poles are first erected along the upper edge of the wanted cutting and with the same inclination as this. Next the first described inclination-setting instrument is set at the wanted angle of inclination, whereafter the drilling machine and drilling platform are maneuvered partly so that the level is zeroed and partly so that the staking poles are visible in line with the respective focussing screens.

When drilling in tunnels, paralleling and aligning of the drill holes is a major problem. In this case the inclination-setting instrument is complemented by a compass 5, which is mounted as is apparent from FIGS. 1 and 3 inside the inclination-setting device. On account of the large metal masses it is difficult to completely compensate the compass for deviation, but this is of negligible significance when the distance between drill holes is small. Furthermore, possible deviations can easily be corrected against ordinary measuring in the tunnel.

In use the desired number of degrees appropriately in the same direction as the tunnel has is set on the compass and the angle of inclination of the tunnel on the inclination-setting instrument, whereupon the drilling machine and feed beam are maneuvered until the wanted position is reached, i.e., when the image of the bubble is centered on the screen 4.

Alternatively the housing can be combined with a direction-finding instrument of the kind shown in FIGS. 4 and 5.

The housing 21 is then united with a tiltable member 22, e.g. a feed beam on a drilling machine of the kind shown in FIG. 2 via a second housing 23, here designated angle housing. This angle housing features a universal joint (not shown) or the like and a graduated scale 6 for setting of the predetermined inclination of the tiltable member in the vertical plane.

Carried on the housing 21 is a pivotable or rotatable aiming device with a holder 24 and four aligning means 25. The aligning means 25 are located in the corners of a square or rectangle. Each and every one of these can with the aid of two other aligning means allow aligning towards either a point in the direction of the tiltable member, e.g., the feed beam, or a point in a direction opposite thereto.

The holder 24 is fixable in relation to the housing 21 by means of a brake device 26.

The aiming device 24, 25 is flxable to the angle housing via a lock pin 27, which can snap into a hole 28. The lock pin 27 can be detained but can be activated when so desired, whereupon it can enter the said hole.

The direction-finding instrument is used in the following manner:

1. The wanted inclination, e.g. in the ratio 3:1 of the tiltable member in relation to the horizontal plane is set on the graduated scale 6. The angle housing 23 is then disengaged. The tiltable member can now be set from the operating position with the correct inclination and roughly the correct direction in the horizontal plane. The correct inclination is obtained by centering the level bubble.

2. The operator then approaches the instrument, releases the brake 26 and aims with the aid of the aiming device towards the wanted point P in the terrain, etcetera. (FIG. 7).

3. The brake 26 is applied and the lock pin 27 is activated (FIG. 7).

4. The angle housing 23 is turned until the lock pin 27 enters the hole 28.

5. The operator returns to the operating position and maneuvers the tiltable member, e.g. the feed beam. until the image of the level bubble is centered.

When the angle housing 23 is made to move to the position in which the lock pin 27 enters the hole 28 it can theoretically be said to move along the generatrix of a cone, the cone angle of which corresponds to the angle of inclination in relation to the horizontal plane of the tiltable member, e.g. the feed beam.

Exact transmission of the directional change which must be carried out by the tiltable member in order for it to adopt the wanted predetermined direction and inclination thereafter takes place in conjunction with the centering of the level bubble in that the tiltable member, e.g. the feed beam 22 is then imparted a motion back along the generatrix of a corresponding cone. In practice, however, the movement of the tiltable member need naturally not follow the said generatrix. The movement can thus take place stagewise in different directions or for example follow a chord between a point on the said generatrix which corresponds to the initial position and another point on the generatrix which corresponds to the predeterminal final position.

The direction of the said chord is indicated to the operator by the position of the level bubble in relation to the centering point of the level bubble.

A direction-finding instrument according to the invention allows very great accuracy for setting in both the horizontal and the vertical plane. Theoretically, an accuracy of l/600 can thus be obtained. The hole 28 can be superseded by several corresponding holes. Alternatively the angle housing can be locked together in an arbitrary position in relation to the aiming device.

Various modifications are possible within the framework of the fundamental invention concept.

The device has been described in connection with a drilling machine but it is evident to the man of art that it can find many other applications where it is of importance that one member shall take a predetermined angle relative to the ground or a second member. Further the aiming instrument described will facilitate directioning of the one member in a plane at right angles to the plane in which the first mentioned predetermined angle is set.

What I claim is:

l. A plumb or inclination-setting device for an apparatus comprising a member which is tiltable in a vertical plane such as a drilling machine, crane, platform or the like, the inclination of said tiltable member in relation to the horizontal plane being regulated from an operating position located at a distance from said tiltable member, characterized by a housing, means for mounting said housing upon said tiltable member so that said housing is rotatable about a first axis perpendicular to said vertical plane, a level carried by said housing, means for illuminating said level, and means for projecting a magnified image of said level so that said magnified image of said level may be viewed with the naked eye from the operating position.

2. A plumbor inclination-setting device according to claim 1, characterized in that the housing is in the form of a plummet pendulously suspended from said means for mounting said housing.

3. A plumb or inclination-setting device according to claim 1, characterized in that said means for mounting said housing is movable along the longitudinal axis of the tiltable member.

4. A plumbor inclination-setting device according to claim 1 characterized by a graduated scale on said housing for setting the horizontal angle of inclination of said housing in relation to said means for mounting said housing.

5. A plumbor inclination-setting device according to claim 4, wherein said housing includes an upper and lower portion, said lower portion being rotatably attached to said upper portion to rotate about a second axis orthogonal to said first axis and further includes a second graduated scale for indicating rotation of said lower portion of said housing with respect to said upper portion.

6. A plumbor inclination-setting device according to claim 1, including a compass for aiming said tiltable member.

7. A plumbor inclination-setting device according to claim 1, characterized in that said means for projecting a magnified image of said level comprises at least one lens defining a single optical axis, a mirror inclined in relation to the optical axis of at least one of said lenses, and a focusing screen.

8. A plumbor inclination-setting device according to claim 7, characterized in that the focussing screen is surrounded by a protective hood, so that viewing of the enlarged image of the level in sunny weather is facilitated.

9. A plumbor inclination-setting device according to claim 7, characterized in that the focussing screen has a circular shape.

10. A plumbor inclination-setting device according to claim 1, wherein said means for mounting said housing comprises an angle housing mounted on said tiltable member, and said device further includes aiming means for sighting on a fixed point on the horizon, and means rotatably mounting said aiming means for rotation with respect to said housing.

11. A plumb or inclination-setting device according to claim 10, characterized in that said aiming means comprise holding means including means for fixing said aiming means in relation to said housing.

12. A plumbor inclination-setting device according to claim 11, including means for setting said housing in a fixed position with respect to said mounting means.

13. A plumb or inclination-setting device according to claim 1, including a motor for rotating said mounting means with respect to said tiltable member.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2187367 *May 4, 1939Jan 16, 1940Sperry Sun Well Surveying CoMethod and apparatus for orienting drill stems
US2313734 *Jun 19, 1941Mar 16, 1943Samuel M BurkaTemperature compensated bubble for panoramic sextants
US2570122 *Apr 1, 1949Oct 2, 1951Heckert Frederick WLeveling and contouring apparatus
US2835220 *Sep 14, 1956May 20, 1958Rardin Clarence JBoom angle indicator
US2993281 *Aug 11, 1958Jul 25, 1961Russell Dock MortimerSpirit level and protractor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4005595 *Sep 26, 1975Feb 1, 1977Wean United, Inc.Feeding workpiece apparatus for cold pilger rolling mills
US4103430 *Aug 31, 1977Aug 1, 1978Schrader Joseph FViewing device for a bubble level
US4495706 *Jul 19, 1982Jan 29, 1985The Stolle CorporationAlignment gage for dish antenna
US6968626 *Jun 30, 2004Nov 29, 2005International Business Machines CorporationHorizontal plane viewable precision bubble level
US7000328 *Mar 4, 2004Feb 21, 2006Donald IliffSurveyor's tool
US7331114 *Mar 28, 2006Feb 19, 2008Belew Samuel BMagnetic compass structure
Classifications
U.S. Classification33/333, 33/348, 33/352
International ClassificationE21B47/022, E21B15/00, E21B7/02, E21B19/08, E21C35/06, E21D9/00
Cooperative ClassificationE21B47/022, E21B7/025, E21B7/022
European ClassificationE21B7/02J, E21B47/022, E21B7/02C