A device for taking a measurement of a dimension of a part of the body of a patient, includes: an electronic tape measure having a portable housing, a winder accommodated in the housing, a tape which is partially wound on the winder and of which a portion, called the “unwound portion”, extends outside the housing, and a measuring module for a measurement, relative to the unwound portion; a consistency control module for checking the consistency of the measurement by at least one consistency rule and at least one context datum; and an alert module for delivering an alert if an inconsistency is detected by the consistency control module.

A tool, such as a tape measure, including a spring-based retraction system is shown. The tape measure includes a fluid-based retraction speed controller. The speed controller may be formed from a rotor/stator arrangement. The rotor is coupled to the reel and the stator is coupled to the housing opposing the rotor. The rotor converts some rotational energy from tape reel into movement of a fluid (e.g., movement of air, movement of oil, etc. through friction) which acts to slow or limit the retraction/rotational speed of the reel as the retraction spring expands driving the reel during tape blade retraction.

An apparatus is configured to employ with a retractable tape measure including a flexible measuring tape. The apparatus includes an electronic system including a laser receiver and a body configured to house the electronic system therein. The laser receiver is configured to detect a laser projected in at least one of a red wavelength and a green wavelength. The body includes an arcuate-shaped cavity configured to receive the flexible measuring tape in a sliding engagement, and a top surface oriented to face in a direction from which the flexible measuring tape is read with the flexible measuring tape received in the cavity. The top surface includes a port configured to align with the laser receiver.

An apparatus is configured to employ with a retractable tape measure including a flexible measuring tape. The apparatus includes an electronic system including a laser receiver and a body configured to house the electronic system therein. The laser receiver is configured to detect a laser projected in at least one of a red wavelength and a green wavelength. The body includes an arcuate-shaped cavity configured to receive the flexible measuring tape in a sliding engagement, and a top surface oriented to face in a direction from which the flexible measuring tape is read with the flexible measuring tape received in the cavity. The top surface includes a port configured to align with the laser receiver.

A linear measuring device includes a tape housing and a semi-flexible measuring tape housed within the tape housing of a length L in a generally spiral configuration with an outer end extendable through a tape outlet opening and having a flange thereon. The tape having two sets of measurements, a first set displayed on a top side of the measuring tape with a first incremental measurement X, and second set displayed on a bottom side of the measuring tape with a first incremental measurement X+L.

An optical readout device for providing visual circumference and diameter readings of an object being measured by a linear tape. The tail end of the tape passes by a reader element in a digital device which is equipped electronically with the pi conversion factor to provide selective readings of diameter in English and metric units, as well as circumference readings. The device can be employed for external (outside) and internal (inside) measurements.

A measuring device for use with a laser level includes a measuring tape. A section of the measuring tape is substantially transparent and thus allows passage of a laser beam that is emitted by a laser level. Indicia of the measuring tape indicate a distance of the laser beam from a terminus of the measuring tape.

A measuring device for use with a laser level includes a measuring tape. A section of the measuring tape is substantially transparent and thus allows passage of a laser beam that is emitted by a laser level. Indicia of the measuring tape indicate a distance of the laser beam from a terminus of the measuring tape.

Disclosed is a measuring device that is adapted for providing conversions from fractions of an inch to decimals of an inch and vice versa. The measuring device includes a ruler having a first edge opposite a second edge. The first edge includes markings for indicating units of measurement in decimals, while the second edge includes markings for indicating units of measurement in fractions. The markings in decimals directly align with corresponding markings in fractions so that the user can determine fraction-decimal equivalents by locating the alignments of the markings. Furthermore, the present invention may be a traditional ruler, a retractable tape measure, a measuring tape, a right angle ruler, or a yard stick, depending upon embodiment.

A belt assembly includes a belt retractor, a sensor having a detection field, and a belt retractably payable from the belt retractor through the detection field. The belt has a webbing and a plurality of markers fixed to the webbing. The webbing has a longitudinal length and the markers are equally spaced along the longitudinal length of the webbing. The sensor senses the length of the webbing paid out. A size of the occupant may be determined based on the length of the webbing paid out, and the size of the occupant may be used to classify the occupant in classes.