CA2527464A1 - Measuring and leveling device - Google Patents

Abstract

A measuring and leveling tool has a distance encoder which is movable along a surface. The tool determines a distance traveled by the measuring device. The distance traveled is displayed in a digital display. The tool includes a laser leveling device which may be self-leveling or may be leveled manually to provide a projected line.

Description

r MEASURING AND LEVELING DEVICE
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation-in-part application of pending U.S. Serial No.
10/277,474, filed October 22, 2002 entitled "Laser Level", which claims the benefit of U.S. Provisional Application No. 60/384,673, filed May 31, 2002. Also, this is a U.S.
non-provisional application which claims the benefit of U.S. Provisional Application No.
60/629,277, filed October 18, 2004. The disclosures of alf of the above applications are expressly incorporated herein by reference.
FIELD OF THE INVENTION

[0002] The present invention relates to tools and, more specificaNy, to a device which provides measured distances, as well as a laser level.

[0003] In the building or construction fields, as well as in residential use, it is desirable to have a tool that is capable of measuring the distance between two points as well as providing a laser level line between the two points. When a workman is, for example, laying tile, it is desirable to have a level line, both vertically and horizontally, so that the workmen can lay the tile square and along a straight line. Also, workmen desire to know the distance between points, such as studs, so that the work can be attached to the studs. ft is desirable to have a toot which is capable of providing both a measuring and leveling feature. Further, it is desirable to provide distance measurements for point to point measurements on a surface, in combination with a laser tine generator or a laser fine level to aid in layout work involving measurement, marking distances, parallel or perpendicular line projection, and plumb or level line projection.
SUMMARY OF THE INVENTION

[0004] The present invention provides a contact measurement system capable of measuring the distance traversed from a first point on the surface to a second point on the same surface in one or two axis. The measurement function can be used in combination with a laser line generating device with leveling function (self leveling or manual leveling) or without leveling function.

[0005] The tool may be configured for use on horizontal and vertical surfaces.
The tool is capable of functioning in a self-leveling, manual leveling or line lock mode.
On vertical surfaces, the tool could be used to project one or more level and/or plumb lines. Also, the device can measure the distance from, or to, vertical or horizontal reference locations to a second location. This enables marking of parallel level or plumb lines at specific distance intervals or the measurement of distance between or from existing surface features such as edges, holes or the like for layout and/or marking purposes.

[0006] The invention enables fixed offset calibrations from one or more reference surfaces on the exterior of the device to enable zeroing to an adjacent surface for measurement from that surface. The present invention could incorporate a central hole for location marking and measurement references. The central hole may be coincident with the level and/or plumb laser lines. Also, the present invention could be set to measure from one or more referenced edges to the center hole depending on the need or the application.

[0007] The present invention digitally displays the distance measured in an inch or metric mode. Additionally, the invention may include a programmable audible tone to alert each time a preset distance interval is reached.

[0008] The present invention utilizes a contact measurement device such as a wheel, roller or ball and roller to distance transducer, or non contact measurement device such as an optical system, which is utilized in mouse or track ball applications.

[0009] The present invention enables measurement along first and second axes on a surface. Also, the present invention provides projection lasers which project in vertical, horizontal and/or oblique direction.

[0010] According to one aspect of the invention, a measuring tool comprises a housing with an electronic package positioned in the housing. A power source is electrically coupled with the electronic package. A display mechanism is electrically coupled with the electronic package. An encoder is mounted with the housing and electrically coupled with the electronic package. The encoder mechanism travels between a first position and a second position. The electronic package along with the encoder determines the distance traveled and displays a read-out on the display mechanism. Also, a leveling mechanism is coupled with the housing. The leveling mechanism includes a laser line generator. The encoder measuring mechanism is capable of measuring in more than one direction. The housing includes an alarm coupled with the electronic package to notify the user of a predetermined traveled interval. The encoder may be a contact or non-contact measuring device. A
leveling device is coupled with the housing. The display mechanism may include a pair of displays for measuring the distance traveled in a horizontal and vertical direction.

[0011] According to a second aspect of the invention, a measuring tool comprises a housing with an electronic package. A power source is electrically coupled with the electronic package. The display mechanism is electrically coupled with the electronic package. An encoder is mounted with the housing and electrically coupled with the electronic package. The encoder travels between a first and second point. The encoder along with the electronic package determines the distance traveled and displays a readout on the display mechanism. The encoder is capable of measuring in more than one direction. An alarm is coupled with the electronic package to notify the user of a predetermined traveled interval. The encoder may be a contact or non-contact measuring device. The display mechanism may include a pair of displays to measure the distance traveled in both the horizontal and vertical direction.

[0012] From the following description, taken in conjunction with the attached drawings, other objects and advantages of the present invention will become apparent to those skilled in the art.
BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of a first embodiment of the present invention.

[0014] Figure 2 is a rear elevation view of Figure 1.

[0015] Figure 3 is a perspective view of a second embodiment of the present invention.

[0016] Figure 4 is a rear perspective view of Figure 3.

[0017] Figure 5 is a perspective view of another embodiment of the present invention.

[0018] Figure 6 is a perspective view of an additional embodiment of the present invention.

[0019] Figure 7 is a perspective view of an additional embodiment of the present invention.

[0020] Figure 8 is a perspective view of an additional embodiment of the present invention.

[0021] Figure 9 is a perspective view of an additional embodiment of the present invention.

[0022] Figure 10 is a rear plan view of the embodiment of Figure 9.

[0023] Figure 11 is an enlarged perspective view of the view of Figure 10.

[0024] Figures 12A and 12B are plan schematic views of the measurement assembly.

[0025] Figure 13 is an enlarged schematic view of the measurement assembly.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Turning to the Figures, a tool in accordance with the present invention is illustrated and designated with the reference numeral 20. The measuring tool 20 includes a housing 22, distance encoder 24, electronics package 26 and a power source 28, such as a battery.

[0027] The housing 22 has a digital distance display 30 positioned on the housing 22. Also, the housing includes an audible tone mechanism 32 which is electrically connected with the electronics package 26.

[0028] The distance encoder 24, using a wheel, is electrically coupled with the electronics package 26. The distance encoder 24 and its function will be described herein.

[0029] A level line generator 34 is positioned within the housing 20. The laser level line generator 34 may include a self-leveling mechanism such as a pendulum or the like, or an external level reference such as bubble vials 25, 27 or the like, and/or may be manually set to provide a projected laser line. The laser line projects through an aperture or a lens 36 in the housing 22. The operation of the measuring device and the laser level will be discussed below.

[0030] Moving to Figure 2, a second embodiment of the present invention is shown. Here, the elements which are the same are identified with the same reference numerals. The housing 22 has a shape different than that of Figures 1 and 2, however, it includes the same features as in Figure 1. The distance encoding device 40 is different from that previously described. Here, the distance encoder 40 may include a roller ball 42. The roller ball 42 is coupled with a pair of contacts 44 and 46 to provide dual axis encoding. The roller ball is like those used in computer mouses.
This enables the measuring device 20 to determine distances in both a horizontal and vertical direction. Thus, the housing 22 includes an additional digital display 30' to display the measured distance in a vertical direction. Also, the ball encoder 42 could be substituted with an optical encoder, like those utilized in computer mouses.
Further, a pair of dual wheels could be substituted for the rolling ball to provide measurement in two directions. Also, a single elongated roller could be used.

[0031] Turning to Figure 5, an additional embodiment of the present invention is shown. Elements which are included in this embodiment, which are the same as those previously discussed, are identified with the same reference numerals.

[0032] Figure 5 illustrates a measuring device 20, which includes a housing 22', which includes a pair of reference surfaces 50 and 52 on its end. The reference surfaces 50 and 52 are flat and planar so that they can be positioned against an additional surface to enable the tool to be utilized from a referenced surface. Also, the tool includes an additional laser line aperture 54 so that a laser line can be projected both vertically and horizontally out of the housing 22'. Thus, the laser lines can be projected in one of three directions. Also, the housing could be modified with an aperture so the laser lines project in a fourth direction. Also, if needed the housing and laser generator could be modified to project at any desired angle. Also, a distance encoder 24, with a wheel, may extend out of the back surface or bottom surface of the housing 22'.

[0033] Turning to Figures 6 and 7, a single axis measurement wand 60 and stick 62 device are shown. These devices enable easy measurement in a single axis direction. As above described, distance encoder 24, 40 may be utilized as the encoder device. Also, a digital distance display 30 is positioned on the wand 60 or the stick 62 to provide the distance that the tool is moved from one position to the other to identify the user the distance traveled. The wand 62 and stick 60 include electronics 26 and power source 28 like those described.

[0034] Figure 8 illustrates another embodiment of the present invention.
Figure 8 illustrates a measuring tool 20 which includes a disk shaped housing 70. The housing 70 includes a central hole 72 which enables a measurement reference for marking or viewing a specific location. The tool 20 includes a single ball or optical device or a dual ball and roller device as described to provide distance encoding. Also, two digital readouts 30 are present to provide distance indicators for both vertical and horizontal directions.

[0035] Moving to Figures 9 through 13, an additional embodiment is shown.
The measuring leveling tool 120 includes a housing 122 which includes a distance encoder 124, electronic package 126, power source 128, and digital display 130. The electronics 126 are electrically coupled with the distance encoder 124, as well as with the power source 128 and digital distance display readout 130. Further, a laser line generator 134 is positioned within the housing 122. The laser line generator 134 is aligned with apertures 136 and 138. Thus, the laser line can be projected at angles 90 degrees with respect to one another to provide a projected horizontal and/or vertical laser line. Also, a central aperture 140 is positioned at the intersection of the projected laser lines. The aperture enables marking and viewing as discussed above. The laser leveling generator 134, like those previously discussed, is also coupled with the power source 128 and electronics 126. The laser generator 134 may be a pendulum self-leveling type or it may be locked in position to be used manually as a line generator.

[0036] The distance encoder mechanism 124 includes a knob 150 which acts as an axis control mechanism switching the axis between a horizontal and vertical position. The knob 150 is coupled with a yoke 152 which projects through a main body block 154 positioned within the housing 122. The yoke 152 is rotatably positioned within the main body 154. Thus, the yoke 152 can be rotated between a horizontal and vertical position within the main body 154. The yoke 152 includes stops 156 to enable accurate positioning of the yoke in the main body with respect to horizontal and vertical.
Springs 158 are positioned within the stops 156 to prohibit movement of the yoke and to lock the yoke in the horizontal and vertical positions. The springs 158 activate switches 160 and 162. When a spring is in a stop, the designated switch is in an OFF
position, as illustrated in Figures 12A and 12B. When the spring is pressed against the contact, that switch is activated. The switches 160, 162 activates the processor in the electronics packagers to provide a vertical or horizontal direction.

[0037] A single wheel (or pair of wheels) 164 is rotatably mounted about a pin 166. A sensor 168 is positioned adjacent to an encoder wheel 170 which is coupled with the wheel 164. The encoder wheel 170 has a plurality of apertures, as best seen in Figure 13. As the encoder wheel apertures 172 pass the sensor 168, signals are sent to a processor in the electronics package 126, which determines the distance traveled by the wheel 164. This distance is then displayed on the digital display 130.

[0038] In use, whether a vertical or horizontal distance is to be measured, the knob 150 is rotated to the desired position. When the knob 150 is rotated, the single wheel (or pair of wheels) 164 is moved from a horizontal to vertical or vice versa direction. Also, the desired switch 160, 162 is activated notifying the processor that a vertical or horizontal direction is to be measured. As the tool is moved along the vertical or horizontal direction, the sensor provides signals to the processor, which monitors the output of the sensor. The processor calculates the distance the wheel 164 is rolled along the surface and displays the information on the digital display 130. The pivoting of the wheel 164 from horizontal to vertical enables the orientation of the wheel to be changed and therefore the direction of measurement to be changed relative to the body of the measuring device. As the yoke 152 is pivoted, the stops 156 ensure that the selectable directions of measurement are perpendicular to each other and suitably aligned with relevant device features such as the external reference surfaces which fix the direction projected lasers and self-leveling projected lasers.

[0039] Since a single encoder and wheel are used to measure along two axis, the processor requires a way to differentiate signals from each other. The two switches 160, 162 are activated when the stop is engaged. Thus, when the stop is engaged, the wheel is perfectly aligned. A variation of the design could consist of a single switch that would be activated by a 90 degree rotation of the yoke.

[0040] Also, a zeroing button 180 may be included. The zeroing button 180 enables the user to set the distance counter for both axis to zero.
Measurements can then be made along either axis by changing the orientation of the measuring wheel and not the entire tool. In wall measurement applications, this is critical as it enables incorporation of a self-leveling or manual leveling laser which is a critical component for wall layout work. The self-leveling or manual leveling laser permits the user to make reference marks on a surface, either level or plumb, with the measurement start position. A fixed direction projected laser enables the user to keep the tool aligned correctly along the measurement paths, perhaps aimed at a reference mark.

[0041] Ordinarily, the measuring laser tool is utilized as follows. A starting point is determined by either marking or having a previously marked surface.
The measuring axis control knob 150 is rotated to provide the desired horizontal or vertical orientation. The laser generator 134 is activated to show a line which would extend to or point away from a desired mark. The tool is then rolled along the surface to provide a desired measurement. If a predetermined measurement is already picked, this measurement could be programmed into the device so that it would make an audible noise when that particular distance is reached. Also, the digital readout provides the distance traveled by the device as it moves along the line. Also, the device could be programmed to provide information such as where to position marks when the distance is to be divided by a particular number.

(0042] Only preferred embodiments of the present invention has been described. Other objects and advantages of the present invention will become apparent to those skilled in the art.

Claims (14)

1. A measuring tool comprising:
a housing;
an electronic package positioned in said housing and a power source electrically coupled with said electronic package;
a display mechanism electrically coupled with said electronics package;
an encoder mounted with said housing and electrically coupled with said electronics package, said encoder traveling between a first and second point, said electronic package determining the distance traveled and displaying a readout on said display mechanism; and a leveling mechanism coupled with said housing.

2. The measuring tool according to Claim 1, wherein said level mechanism includes a laser line generator.

3. The measuring tool according to Claim 1, wherein said encoder measures in more than one direction.

4. The measuring tool according to Claim 1, further comprising an alarm coupled with said electronics package for notifying user of a traveled interval.

5. The measuring tool according to Claim 1, wherein said encoder is a contact measuring device.

6. The measuring tool according to Claim 1, wherein said encoder is a non-contact measuring device.

7. The measuring tool according to Claim 1, wherein a leveling device is coupled with said housing.

8. The measuring tool according to Claim 1, wherein said display mechanism includes a pair of displays.

9. A measuring tool comprising:

a housing;
an electronic package positioned in said housing and a power source electrically coupled with said electronic package; and a display mechanism electrically coupled with said electronics package;
an encoder mounted with said housing and electrically coupled with said electronics package, said encoder traveling between a first and second point, said electronic package determining the distance traveled and displaying a readout on said display mechanism.

10. The measuring tool according to Claim 9, wherein said encoder measures in more than one direction.

11. The measuring tool according to Claim 9, further comprising an alarm coupled with said electronics package for notifying user of a traveled interval.

12. The measuring tool according to Claim 9, wherein said encoder is a contact measuring device.

13. The measuring tool according to Claim 9, wherein said encoder is a non-contact measuring device.

14. The measuring tool according to Claim 9, wherein said display mechanism includes a pair of displays.