In accordance with one embodiment of the present invention, there is provided a device for measuring length of feedstock being fed to a tool operated directly by a user. The device includes a body, configured to be removably attached to the tool. The device also includes a display, mounted in the body, and visually accessible to the user. The device also includes a measurement wheel mechanically mounted to the body and configured to be mechanically biased to the feedstock under a condition wherein the body is attached to the tool. The device also includes an encoder coupled to the measurement wheel and configured to generate a signal indicative of angular position of the wheel. The device further includes a processor, disposed in the body, coupled to the encoder and the display and configured to cause the display to show a measure indicative of a length of the feedstock that has been fed to the tool.

In accordance with one embodiment of the present invention, there is provided a device for measuring length of feedstock being fed to a tool operated directly by a user. The device includes a body, configured to be removably attached to the tool. The device also includes a display, mounted in the body, and visually accessible to the user. The device also includes a measurement wheel mechanically mounted to the body and configured to be mechanically biased to the feedstock under a condition wherein the body is attached to the tool. The device also includes an encoder coupled to the measurement wheel and configured to generate a signal indicative of angular position of the wheel. The device further includes a processor, disposed in the body, coupled to the encoder and the display and configured to cause the display to show a measure indicative of a length of the feedstock that has been fed to the tool.

A wheeled distance measuring device has a longitudinal pole, a housing, a wheel, a gear coupling mechanism, and a transmission assembly. The housing is attached to the longitudinal pole and has a fork. The counter is mounted in the housing and has a spindle and a gear mounted on the spindle. The wheel is mounted rotatably on the fork and has an axle and a spur gear mounted on the axle. The gear coupling mechanism is mounted on the fork and has a stem, an upper spur gear, and a lower spur gear engaged with the spur gear on the axle of the wheel. The transmission assembly is mounted on the housing and has multiple gear elements. One of the gear elements is engaged with the gear on the spindle, and another one of the gear elements is engaged with the upper spur gear.

A wheeled distance measuring device has a longitudinal pole, a housing, a wheel, a gear coupling mechanism, and a transmission assembly. The housing is attached to the longitudinal pole and has a fork. The counter is mounted in the housing and has a spindle and a gear mounted on the spindle. The wheel is mounted rotatably on the fork and has an axle and a spur gear mounted on the axle. The gear coupling mechanism is mounted on the fork and has a stem, an upper spur gear, and a lower spur gear engaged with the spur gear on the axle of the wheel. The transmission assembly is mounted on the housing and has multiple gear elements. One of the gear elements is engaged with the gear on the spindle, and another one of the gear elements is engaged with the upper spur gear.

A probe assembly for measuring a synthetic turf infill profile having a probe, a turf surface contact assembly and a sensor. The probe is configured to extend down through the turf infill profile until a tip of the probe contacts a lower boundary of the turf infill profile. The surface contact assembly is vertically movable relative to the probe while the probe is being moved downwardly into the turf infill profile, wherein the surface contact assembly has a contact area with the turf surface that is large enough to retain the surface contact assembly resting atop an upper boundary of the turf infill profile when the lowermost tip of the at least one probe has contacted the lower boundary of the turf infill profile. The sensor reads the distance between the upper and lower boundaries of the turf infill profile at a sampled location in the turf surface.

A fastening structure of a rangefinder wheel includes a first unit and a second unit. The first unit includes a first base which has a first passage defined axially therethrough for receiving a first tube therein. A lever is pivotably connected to the first base and has an engaging hole. A first spring and a second spring are biased between the first base and the lever. The second unit is pivotably connected to the first base and has a second base which has a second passage defined axially therethrough for receiving a second tube therein. An engaging member is connected to the second base and has a protrusion which is engaged with the engaging hole of the lever. The lever compresses the first spring to move a distance transversely. The lever compresses the second spring to move a distance axially so as to separate the lever and the engaging member.

A fastening structure of a rangefinder wheel includes a first unit and a second unit. The first unit includes a first base which has a first passage defined axially therethrough for receiving a first tube therein. A lever is pivotably connected to the first base and has an engaging hole. A first spring and a second spring are biased between the first base and the lever. The second unit is pivotably connected to the first base and has a second base which has a second passage defined axially therethrough for receiving a second tube therein. An engaging member is connected to the second base and has a protrusion which is engaged with the engaging hole of the lever. The lever compresses the first spring to move a distance transversely. The lever compresses the second spring to move a distance axially so as to separate the lever and the engaging member.

The disclosure is an irregular object length measuring instrument, comprising a first fixing seat, at least two mounting flanges are provided on an edge of the first fixing seat, and a notch is provided on the first fixing seat, a shaft sleeve, the shaft sleeve is mounted on the mounting flange, a main board, a battery is installed on the main board, a gear and an angle sensor are installed on the main board, and the angle sensor is installed on the gear, a second fixing seat, an edge of the second fixing seat is provided with a matching flange that cooperates with the mounting flange, the second fixing seat is installed on the first fixing seat, and the main board is fixedly installed on the first fixing seat or the second fixing seat, a swivel, an outer side of the swivel is provided with a ring groove.

The present invention relates generally to measuring lengths. Typically one would use a ruler or tape ruler to measure units of distance, and to measure surface area of objects of a variety of shapes and sizes. However, in existing technology when using a ruler or tape ruler one cannot measure objects with complex shapes and sizes such as objects with a curved path, curved shape or irregular shape. Therefore, this new invention of Tapeless Measure Gauge provides a handheld digital rolling measuring gauge in a single item solution to accurately measure such objects varying from a flat surface, to a curved surface or shape or irregular shape.

The present invention relates generally to measuring lengths. Typically one would use a ruler or tape ruler to measure units of distance, and to measure surface area of objects of a variety of shapes and sizes. However, in existing technology when using a ruler or tape ruler one cannot measure objects with complex shapes and sizes such as objects with a curved path, curved shape or irregular shape. Therefore, this new invention of Tapeless Measure Gauge provides a handheld digital rolling measuring gauge in a single item solution to accurately measure such objects varying from a flat surface, to a curved surface or shape or irregular shape.