1
Gartner Klaus W: Key duplicating and vending machine. Sargent & Greenleaf, March 12, 1974: US3796130 (44 worldwide citation)

An unattended semi-automatic, coin operated duplicate key vending machine for use by members of the general public, the machine having a supply of key blade blanks with different cross sectional shapes in storage. The correct blank may be quickly selected by a customer by placing his key into one of ...


2
Patriquin George P: Automatic key duplicating apparatus. Hudson Lock, Toupal John E, February 11, 1975: US3865011 (37 worldwide citation)

Disclosed is a key making machine with a sample vise for receiving and retaining a sample key to be duplicated and a blank vise for receiving and retaining a key blank. When the sample key is positioned properly a path of electrical conduction is provided through it. A similar conductive path is est ...


3
Essig Ted: Method and apparatus for duplicating a key. August 8, 1972: US3682041 (31 worldwide citation)

A method and apparatus for duplicating a key from a universal key blank. A plurality of tracer rods are mounted to a carriage on either side of a slot receiving a key to be duplicated. The tracer rods are coupled to a plurality of rotatable cutting tools mounted on either side of a second slot recei ...


4
Richens Robert H: Key-positioning vise assembly for automatic key cutter. Ilco Corporation, August 31, 1971: US3602092 (29 worldwide citation)

In a key-cutting machine of the type in which a cutter and stylus are moved relative to a key blank and a key, an improved vise assembly for automatically, accurately positioning the key and blank in a predetermined tracing and cutting disposition.The vise assembly includes a clamp head for picking ...


5
Schlage Ernest L: Machine for making obtunded key profile. Schlage Lock Company, Lothrop & West, November 18, 1975: US3919920 (22 worldwide citation)

An obtunded key profile is provided in a lock key having a shank extending parallel to a straight reference line. The key has a plurality of reference surfaces spaced apart longitudinally in the direction of the line according to a predetermined pattern and spaced transversely away from the line als ...


6
Oliver Roy N: Lock key reproducing tool. April 30, 1974: US3807276 (21 worldwide citation)

A device for reproducing a lock key using a key blank wherein the key to be reproduced has bits cut into it at varying angles with respect to the plane described by the key including a fixture for clamping both the pattern key and the key blank to move correspondingly in the fixture and cooperating ...


7
Hungerford Jr Philip C, Gereby John L, Richens Robert H: Key cutting machine. Cole National Corporation, July 11, 1972: US3675536 (21 worldwide citation)

A key cutting machine as disclosed which is semi-automatic operation in that the master key to be copied and a blank key are mounted in vises, a door is closed, the machine is turned on and it automatically cuts a key blank in accordance with the master key, brushes the key to remove any burr and th ...


8
Lieptz Nathan S: Calibration gauge for key duplicating machine. Curtis Noll Corporation, Isler & Ornstein, September 2, 1975: US3902382 (19 worldwide citation)

A calibration gauge consisting of a hardened steel piece having parallel longitudinally-extending marginal edges for mounting in one of the key clamps of a key duplicating machine. The gauge is also provided with a shouldered portion and with notches or recesses of predetermined dimension to provide ...


9
Agius Frank P: Key cutter. Learman & McCulloch, May 20, 1975: US3884121 (18 worldwide citation)

Key cutting apparatus for cutting a series of longitudinally spaced notches in the bit of a key blank and including: a rotary cutter; apparatus for moving the key blank into engagement with the cutter and comprising a main carriage transversely movable toward and away from the cutter; a sub-carriage ...


10
Richens Robert H, Garner Charles A: Key machine drive. Cole National Corporation, Woodling Krost Granger & Rust, February 19, 1974: US3792639 (17 worldwide citation)

A key machine drive is disclosed wherein a cam drum with first, second and third sections of a cam track have different pitches and cross each other to establish a small compact drive for the key machine and which may establish an automatic cycle of the cutting action of the key machine. The foregoi ...