Apparatus for documenting stair dimensional uniformity
OwnerChristopher Neil LeBlancinventor
Life of this patent
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Abstract
An apparatus for documenting stair dimensional uniformity which measures variations in riser heights and tread depths in a constructed stair. Improved rule stops are attachable to a carpenter's square at positions corresponding to required step dimensions. In operation, the apparatus is self-standing while being supported by and spanning between the upper and lower nosing of a step. A tread variance indicator and riser variance indicator display the amount of variance from required dimensions. A stable nosing locator identifies the portion of a rounded or beveled nosing that may be included in a tread depth measurement. The variance indicators and stable nosing locator are positioned to facilitate photographic documentation.
Claims20
An apparatus for documenting dimensional uniformity in a constructed stair comprising:
- a horizontal rule stop comprising:
- a horizontal slot,
- a means of fixing position,
- a riser variance indicator comprising at least one means of determining slope,
- a pivot spacer,
- at least one tread variance indicator,
- wherein:
- the horizontal slot is sufficiently sized for a secure connection to a longer square member,
- the means of determining slope comprises a graduated spirit level, spirit level, inclinometer, digital level, and/or other type of digital sensor,
- the pivot spacer is preferably ¼ in. (6.4 mm) to 4 in. (102 mm) tall, more preferably 1 in. (25.4 mm) to 3 in. tall, and most preferably 1 in. (25.4 mm) or 2 in. (50.8 mm) tall,
- whereby:
- upon fixing the horizontal rule stop along the length of the longer square member at a position relative to the required tread depth, the means of determining slope is aligned substantially parallel to the longer square member,
- upon placing the horizontal rule stop on a lower nosing and the shorter square member against an upper nosing in a substantially vertical orientation and at a height determined by the required and measured riser height, any variations between the required and actual step dimensions are displayed via the riser variance indicator and tread variance indicators.
An apparatus for documenting dimensional uniformity in a constructed stair comprising:
- a horizontal rule stop comprising:
- a horizontal slot,
- a means of fixing position,
- a riser variance indicator comprising:
- a means of mounting,
- a means of determining slope,
- a pivot spacer,
- at least one tread variance indicator,
- wherein:
- the horizontal slot is sufficiently sized for a secure connection to a longer square member,
- the means of determining slope comprises a graduated spirit level, spirit level, inclinometer, digital level, or other type of digital sensor,
- the means of mounting consists of one or more of one or more of a flat non-slippery or ferrous top surface, hook and loop, elastic cords, rubber bands, or adhesive,
- the pivot spacer is preferably ¼ in. (6.4 mm) to 4 in. (102 mm) tall, more preferably 1 in. (25.4 mm) to 3 in. tall, and most preferably 1 in. (25.4 mm) or 2 in. (50.8 mm) tall,
- whereby:
- upon fixing the horizontal rule stop along the length of a longer square member at a position relative to the required tread depth, the means of determining slope is aligned substantially parallel to the longer square member,
- upon placing the horizontal rule stop on a lower nosing and the shorter square member against an upper nosing in a substantially vertical orientation and at a height determined by the required riser height any variations between the required and actual step dimensions are displayed via the riser variance indicator and tread variance indicator.
Dependencies are inferred from the claim text.