A flow gauge scale assembly includes a first scale and a second scale. The first scale is configured to be disposed in a first radial position on a generally cylindrical flow tube through which a ball can move to indicate a flow rate of a flow of gas. The second scale is configured to be disposed in a second radial position that will be at least partially optically misaligned from the first scale when the flow gauge scale assembly is installed in the generally cylindrical flow tube.

A flow gauge scale assembly includes a first scale and a second scale. The first scale is configured to be disposed in a first radial position on a generally cylindrical flow tube through which a ball can move to indicate a flow rate of a flow of gas. The second scale is configured to be disposed in a second radial position that will be at least partially optically misaligned from the first scale when the flow gauge scale assembly is installed in the generally cylindrical flow tube.

A gauge assembly includes a dial face including a plurality of printed indicia. A plurality of illuminable chaplet tick marks extend through openings in the dial face. The dial face includes dark outlines around a perimeter of each of the openings for reducing a luminance of each of the chaplet tick marks. A method is also disclosed.

A gauge assembly includes a dial face including a plurality of printed indicia. A plurality of illuminable chaplet tick marks extend through openings in the dial face. The dial face includes dark outlines around a perimeter of each of the openings for reducing a luminance of each of the chaplet tick marks. A method is also disclosed.

A position measuring device includes a first object with a scale band and a second object. Marker stripes extend in a transverse direction from one side of the scale band to the opposite side. A longitudinal axis divides the scale band into first and second paths. First and second marker sensors on the second object pass over the first and second paths as the second object slides longitudinally along the scale band. Each transition between marker stripes is a straight line oriented at an inclination angle relative to the transverse direction. As the second object moves over each transition, the inclination angle of that transition is determined based on how the first and second marker sensors detect the transition over the first and second paths. The measuring device then determines that the second object is located at a particular transition based on the determined inclination angle associated with that transition.

A position measuring device includes a first object with a scale band and a second object. Marker stripes extend in a transverse direction from one side of the scale band to the opposite side. A longitudinal axis divides the scale band into first and second paths. First and second marker sensors on the second object pass over the first and second paths as the second object slides longitudinally along the scale band. Each transition between marker stripes is a straight line oriented at an inclination angle relative to the transverse direction. As the second object moves over each transition, the inclination angle of that transition is determined based on how the first and second marker sensors detect the transition over the first and second paths. The measuring device then determines that the second object is located at a particular transition based on the determined inclination angle associated with that transition.

A gauge assembly includes a dial face including a plurality of printed indicia. A plurality of illuminable chaplet tick marks extend through openings in the dial face. The dial face includes dark outlines around a perimeter of each of the openings for reducing a luminance of each of the chaplet tick marks. A method is also disclosed.

A gauge assembly includes a dial face including a plurality of printed indicia. A plurality of illuminable chaplet tick marks extend through openings in the dial face. The dial face includes dark outlines around a perimeter of each of the openings for reducing a luminance of each of the chaplet tick marks. A method is also disclosed.

A flow gauge scale assembly includes a first scale and a second scale. The first scale is configured to be disposed in a first radial position on a generally cylindrical flow tube through which a ball can move to indicate a flow rate of a flow of gas. The second scale is configured to be disposed in a second radial position that will be at least partially optically misaligned from the first scale when the flow gauge scale assembly is installed in the generally cylindrical flow tube.

A flow gauge scale assembly includes a first scale and a second scale. The first scale is configured to be disposed in a first radial position on a generally cylindrical flow tube through which a ball can move to indicate a flow rate of a flow of gas. The second scale is configured to be disposed in a second radial position that will be at least partially optically misaligned from the first scale when the flow gauge scale assembly is installed in the generally cylindrical flow tube.