A measuring apparatus includes a first angle measuring member, a second angle measuring member, and a display module. The first angle measuring member includes a first connecting shaft, a first needle rotatably connected to the first connecting shaft, and a first angle measuring instrument. The second angle measuring member includes a second connecting shaft, a second needle rotatably connected to the second connecting shaft, and a second angle measuring instrument. The first angle measuring instrument is configured to measure a first angle between the first needle and the first connecting shaft, and the second angle measuring instrument is configured to measure a second angle between the second needle and the second connecting shaft. The display module is configured to calculate a size of the object based on the first angle, the second angle, and lengths of the first connecting shaft and the second connecting shaft.

A wheel center bore size qualification detection device includes an upper crossbeam, large guide posts, small guide posts, a center go/no go gauge no go end, a center go/no go gauge go end, small guide sleeves, large guide sleeves, a stand, jaws, small air cylinders, a coupling flange A, a coupling flange B, a lower crossbeam, bases, a large air cylinder, a centering pin A, centering pins B, a mobile sensor bracket, a mobile sensor, a detection connecting rod and bracket, a backing plate, connecting bolts and a fixed plate. The device provided has the characteristics of accurate location, practical structure, high detection accuracy, high efficiency, work safety and reliability and the like.

A wheel center bore size qualification detection device includes an upper crossbeam, large guide posts, small guide posts, a center go/no go gauge no go end, a center go/no go gauge go end, small guide sleeves, large guide sleeves, a stand, jaws, small air cylinders, a coupling flange A, a coupling flange B, a lower crossbeam, bases, a large air cylinder, a centering pin A, centering pins B, a mobile sensor bracket, a mobile sensor, a detection connecting rod and bracket, a backing plate, connecting bolts and a fixed plate. The device provided has the characteristics of accurate location, practical structure, high detection accuracy, high efficiency, work safety and reliability and the like.

A handrail installation device, including a first arm removably connected to at least a portion of a stair tread, a second arm pivotally disposed at a first end on at least a portion of the first arm to rotate from retracted in parallel with the first arm in a first position to at least partially extended away from the first arm in a second position, and rotate from extended away from the first arm in the second position to retracted in parallel with the first arm in the first position, and a bubble level disposed on at least a portion of the second arm to identify a level surface based on a position of at least one of the first arm and the second arm.

A handrail installation device, including a first arm removably connected to at least a portion of a stair tread, a second arm pivotally disposed at a first end on at least a portion of the first arm to rotate from retracted in parallel with the first arm in a first position to at least partially extended away from the first arm in a second position, and rotate from extended away from the first arm in the second position to retracted in parallel with the first arm in the first position, and a bubble level disposed on at least a portion of the second arm to identify a level surface based on a position of at least one of the first arm and the second arm.

A monitoring system (100) monitors displacement of a wind turbine tower and includes at least one plumb bob with an upper part and a lower part, each plumb bob being configured to be pivotally suspended at its upper part, via a suspension device, from a point above so as to attain a rest position in a rest situation, and each said plumb bob has one or more sensing surfaces (12, 12′). One or more suspension devices means (10) suspend the at least one plumb bob. Two or more sensors (14, 14′, 14″), each being configured to sense, in a specific sensing direction (16, 16′, 16″), a distance to a plumb bob, provide displacement data. At least two of the two or more sensors (14, 14′, 14″) are arranged in a sensing vicinity of a plumb bob, with at least two of the specific sensing directions (16, 16′, 16″) not being parallel to each other. The monitoring system includes a control unit (18) configured to receive the displacement data from two or more of the sensors, and a device for reporting, to an external unit (20), parameter(s) representing displacement of a wind turbine tower.

A monitoring system (100) monitors displacement of a wind turbine tower and includes at least one plumb bob with an upper part and a lower part, each plumb bob being configured to be pivotally suspended at its upper part, via a suspension device, from a point above so as to attain a rest position in a rest situation, and each said plumb bob has one or more sensing surfaces (12, 12′). One or more suspension devices means (10) suspend the at least one plumb bob. Two or more sensors (14, 14′, 14″), each being configured to sense, in a specific sensing direction (16, 16′, 16″), a distance to a plumb bob, provide displacement data. At least two of the two or more sensors (14, 14′, 14″) are arranged in a sensing vicinity of a plumb bob, with at least two of the specific sensing directions (16, 16′, 16″) not being parallel to each other. The monitoring system includes a control unit (18) configured to receive the displacement data from two or more of the sensors, and a device for reporting, to an external unit (20), parameter(s) representing displacement of a wind turbine tower.

An adjustable gauge block that may be quickly adjusted to a desired height and then dialed in to a precision measurement that can replace a set of gauge blocks. The adjustable gauge block of the present disclosure may be further used as a repeatable and precise physical reference to set tool depths and heights. The adjustable gauge block of the present disclosure may be utilized as a physical reference to set drill press bit depths, table saw blade heights, router table bit heights, and the like. Additionally, the adjustable gauge block of the present disclosure may be utilized to check uniformity of thickness along an edge of a piece of stock.

An adjustable gauge block that may be quickly adjusted to a desired height and then dialed in to a precision measurement that can replace a set of gauge blocks. The adjustable gauge block of the present disclosure may be further used as a repeatable and precise physical reference to set tool depths and heights. The adjustable gauge block of the present disclosure may be utilized as a physical reference to set drill press bit depths, table saw blade heights, router table bit heights, and the like. Additionally, the adjustable gauge block of the present disclosure may be utilized to check uniformity of thickness along an edge of a piece of stock.

A valve clearance measuring assembly includes a panel having a first side, a second side, a forward edge and a rearward edge. The forward edge is extendable between a valve tip and a rocker arm. The first and second sides of the panel each are planar and orientated planar with respect to each other. A head includes a central member and a pair of arms. The arms extend in a generally same direction with respect to each other to define a space between the arms. The panel is attached to the arms and traverses the space. The forward edge is in static communication with the arms such that the forward edge is in a linear configuration as the forward edge traverses the space.