Key locating attachment for controlling the depth of penetration of a key into a lock
OwnerMarvin Witham Colemaninventor
Life of this patent
Estimating the term…
Abstract
A key locating attachment for controlling the depth of penetration of a key into a lock. This attachment is engaged with the key and a portion thereof engages the face of the lock when the key is placed therein to align the complemental parts of the key and the lock to actuate the same. The attachment is adjustably fixed to the key in order to permit adjustment thereof to compensate for wear on the bearing surfaces of the lock and key which would otherwise cause misalignment of the interengaging parts of the key and the lock.
Claims7
In a key having a head portion, shoulder and shank portion, an attachment to vary the working depth of the key in a cylinder lock, said attachment including:
- a. a key locating member,
- b. said key locating member comprising a flat plate engaged with a face of the key head portion,
- c. said flat plate being provided with a longitudinal slot, and
- d. a set screw having a shank extending through the longitudinal slot of said flat plate into threaded engagement with the head portion of the key for securing the flat plate to the key and permitting adjustment of the position of the flat plate with respect to the key,
- e. portions of said flat plate proximate the shank of the key being extended to provide flanges which are spaced apart a distance approximately substantially equal to the width of the shank of the key,
- f. said flanges being bent at approximately a right angle to said flat plate, and positioned in alignment with, and in advance of, the shoulder of the key.
In a key having a head portion, shoulder, and shank portion, an attachment to vary the working depth of the key in a cylinder lock, said attachment including:
- a. a key locating member engaged with a face of the key head portion,
- b. means for securing said key locating member to the face of the key,
- c. a portion of said key locating member extending longitudinally of the key beyond the shoulder to a point adjacent the shank portion thereof for engagement with the face of the lock, to limit the depth of penetration of the shank of the key into the lock, and
- d. means for changing the position of said key locating member longitudinally of the key to adjust the depth of penetration of the shank of the key into the lock in order to compensate for wearing of parts of the key and lock.
In a key having a head portion, shoulder, and shank portion, an attachment to vary the working depth of the key in a cylinder lock, said attachment including:
- a. a disc-like member engaged with a face of the key head portion, and
- b. means for securing said disc-like member to the face of the key,
- c. a portion of the periphery of said disc-like member extending longitudinally of the key beyond the shoulder to a point adjacent the shank portion thereof for engagement with the face of the lock to limit the depth of penetration of the shank of the key into the lock.
Dependencies are inferred from the claim text.