Extension level apparatus
OwnerJohn W. Youmansinventor
Life of this patent
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Abstract
An extension level apparatus suitable for use with a carpenter's level includes in combination a pair of elongated frame members adapted to receive therein the carpenter's level and also includes a spring loaded extension member which permits the extension level to be retained in a wall opening into which a door is to be inserted. The extension level permits the user thereof to determine rapidly the exact vertical position of one vertical edge of the door jamb, allowing for shimming where necessary, and permits a measurement to be taken from a starting point to an end point where the second edge of the door opening is to occur. Hereagain the vertical alignment may be rapidly obtained with the use of shimming when necessary, thereby permitting the door jambs to be inserted rapidly and with accuracy.
Claims9
An extension level apparatus suitable for use with a standard carpenter's level comprises, in combination:
- (A) first and second elongated frame members,
- (a) said first frame member having
- (i) a centrally disposed channel extending from one end and terminating at the other end in a solid portion, said channel being adapted to frictionally receive a portion of said carpenter's level therein, the distal edge of said solid portion being at right angles to the longitudinal axis of said first frame member, said one end being provided with a V-shaped notch;
- and
- (b) said second frame member having,
- (i) a centrally disposed channel extending from one end and terminating at the other end in a solid portion, said solid portion being provided with a centrally disposed undercut channel extending to the distal edge of said second frame member, said channel being adapted to frictionally receive the remaining portion of said carpenter's level, said one end being provided with a V-shaped notch adapted to cooperate with said V-shaped notch provided in said first frame member, and
- (ii) length adjustment means having one portion adapted to slideably engage said second frame member undercut channel and move freely therein;
- said one portion having a distal edge perpendicular to the longitudinal axis of said second frame member, a second portion of said length adjustment means extending towards said level when said length adjustment means is disposed within said second frame member, said length adjustment means being provided with means for locking said length adjustment means in a preselected position, and
- (iii) elongated spring means having one end affixed to said length adjustment means and the other end affixed to said second frame member for urging said length adjustment means towards a length extending position.
Dependencies are inferred from the claim text.