US1225539A

US1225539A - Key-cutting machine.

Info

Publication number: US1225539A
Application number: US13554116A
Authority: US
Inventors: Frank Wankel
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-12-07
Filing date: 1916-12-07
Publication date: 1917-05-08
Anticipated expiration: 1934-05-08

Description

F. WANKEL.

KEY CUTTING MACHINE. APPLlcATloN min DEc.7.191s.

2 SHEETS-SHEET I.

F. WANKEL.

KEY CUTTING MACHINE. APPLICATIGN man DEC. 7. 191e.

lg, Patented May 8,1917.

2 SHEETS-SHEET 2.

entre srarns vraraivr eieren.

FRANK WANKEL, F NEW YORK, N. Y.

KEY-CUTTING' MACHINE.

- Application lled December '7, 1916. Serial No. 135,541.

To all whom it may concern:

Be it known that ll, FRANK WANKEL, a citizen of the United States, and a 'resident of the city of NewYork, Ridgewood, borough of Queens, in the county of Queens Vand State of New York, have invented a new and lmprovedKey-Cutting Machine,

of which the following is a full, clear, and exact description.' j

rlFhis invention relates to 4metal-working machinery and has particular reference lto machines for cutting duplicate keys.

Among the objects of the invention 'is to provide a simple yet elicient and reliable -machine for the cutting of lock keys of the type commonly known as Yale, Corbin or4 similar keys in which notches, grooves or slots of varied lengths or widths are provided.

' Another object of the invention is to im-y prove the general construction of the ma' chine, with respect to adjustment of the relatively movable parts providing for an operation of the machine that is materially simplified and improved as to accuracy.

With the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein except as dei-ined by the appended claims,

still for the purpose of illustrating a practical' embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which-- Figure 1 is a vertical longitudinal section on the broken line 1--1 of Fig. 3;

Fig. 2 is a rear elevation;

Fig. 3 isa plan view;

Fig. 4L. is a vertical sectional detail on the .line 4 4 of Fig. 3; and

'Fig 5 is a detail perspective view of the guide post.

Referrin drawings, l

now more particularly to the show a machine comprlsmg a 4rigid frame 10 havingpa4 base 11 designed to be secured or clamped in place by any suitable means as, for example, an anchor bolt 12. rlhe main portion o-the frame constitutes what may be termed a table 13 formed along its side edges with grooves 1d, constituting guideways. The table 13 also supports or carries a pair of vertically Specification of Letters Patent.

cutter 17 secured to a shaft 18 journaled in the standards andadapted to be driven by any suitable means including a wheel 19.

The cutter 17 is of diskshape and provided on its periphery with cutting teeth 17 and on at least one side with cuttingl teeth 17". The cutter wheel is provided also with a hub 20 which is of a length corresponding to the space between the standards 1 6, whereby endwisemovement of the cutter along the axis of its supporting shaft -is prevented.

l provide a carriage comprising a pair of parallel side bars .21 and 22, which operate along the side edges of the table 13 and have ribs or tongues 2 3 projecting toward each other and operating in the guideways 14 ofthe table. These side bars are connected by tranverse tie rods 25 having heads 26 adjacent to the bar 21 and having their opposite ends in threaded engagement with tapped holes in the opposite side bar 22.

y By rotation of these tie rods, the space between the side bars 21 and-22 is regulated, providing for a proper tit between the side bars and the table. ln other words, the side bars are so adjusted that they will have suiicient looseness to slip readily lengthwise of the table along the grooves 14,. but not suiliciently loose to have any appreciable lateral play. After the tie rods are adjusted 1n this manner, they lare preferably locked from rotation by. means 'of set screws 26 tapped into the side bar 21. lt will thus be seen that the carriage is adapted to slide freely longitudinally of the machine, such movement being limited in one direction by the end bar 25 impinging against the standardsv 16. The carriage also includes a .transversel guide bar 27 tted for endwise rotation in a fixed the foregoing description, is mounted for plane perpendicular to the main pla e of the table 13. 29 indicates a guide pos -secured rigidly to the front portion of the table 13and having an active edge 29 andan active side 29", forming a right angle corner having definite relation as to distance from the intersection of the cutter surfaces 17a and 17h andlying in the -same vertical plane thereof. This post is locked in position by a set screw 30, whereby it may be adjusted vertically if desired, but for practicall purposes' it is held in fixed position. j

31 indicates a clamping block or head having two xed jaws 31a and 31", having their axes parallel to each other and arranged at an oblique angle of approximately 45 degrees to the plane of the cutter. Cooperating with these fixed jaws are movable clamping jaws 32a and 32b for holding a master key or pattern M and a blank D to be made into a duplicate of the master key by the operation of this machine. The movable jaws are manipulated by winged nuts,

or their equivalent 33, which coperate with threaded bolts 34 fixed in the head 31. Each fixed jaw of the head is rabbeted at 35 to receivethe shank of the key to be secured thereto, whereby the back of the shank of each key is held in definite position, with respect to the other key. Each movable jaw, also, is provided with a downwardly projecting lip 36 projecting into the rabbet and against the top of the key or blank.' The'cutting edge of the master key, like the corresponding edge of the blank to be cut, extends over or beyond the face of the head or fixed jaw toward the cutter. A plunger l40 by virtue of a spring 41 acts upwardly upon each movable jaw. The plunger is parallel to the threaded bolt 34 and serves also to prevent twisting movement of the movable jaw.

The head 31 is provided at its under surface with transverse

parallel grooves

37 and 38, receiving respectively the guide bar 27 and the intermediate tie rod 25. The groove 37 is preferably deeper than the other, whereby the guide bar is received far enough within it to be gripped in fixed position by means of a set screw 39, or its equivalent, tapped through the front end of .rangement or modification.

being gripped in place and the blank to be l cut being gripped in its place in a position vsymmetrically arranged, with respect to the master key, and with the cutter then rotated by any suitable means, the operator will move the head toward the cutter into contact with the guide post 29, beginning preferably at the hilt of the key. The active guide corner or intersection of the faces 29 and 29b of the guide post will in effect follow the outline of the cut portion of the master key. Inasmuch as the head is rigid and the blank D bears the same relation to the cutter as the master keydoes to the guide post, it follows that the blank will be quickly cut and with absolute precision as a duplicate of the master key. During this cutting action, the head is adapted for practically universal movement, with respect to its plane or the lane of the keys.

The form of t e cutter having its periphery of cylindrical form and its side of Hat form is peculiarly adapted for the cutting 'of the type of keys lndicated, since the notches are commonly cut in the form of right angles or with their sides at right angles to each other correspondin y to the intersecting faces of the cutter. owever, the active guiding edge of the guide post will follow a rounded notch as well as a square notch and the eHect upon the blank will be the same in all cases. noted also that this machine is adapted for the cuttin of other types of keys than those illustrate with very little, if any, rear- This machine is simple in construction, easy of manipulation and labsolutely true and reliable in practical yoperation.

I claim:

1. 1n a key cutting machine, the combination of a stationary table having a pair of guide grooves alongA its opposite edges, a

1t is to be carriage movable longitudinally of the table barand slidable along one of the tie rods for lateral movement with respect to the carriage and movable with the carriage longitudinally of the table, a rotary cutter journaled upon the table for action upon the blank, and a guide post fixed to the table i`n the plane of the cutter for coperation with CII the master key for determining the direction and extent of movement of the head and carriage.

2. rl'he combination with a fixed table and a rotary cutter journaled therein for operation ina definite plane, of a guide post secured to the table and having its operative portion in the plane aforesaid, a carriage comprising a pair of parallel side bars Iitted to the side edges of the table and adapted to reciprocate freely therealong, said car ringe also including a pair of tie rods, each havin a head at one end cooperating with one sie bar and having its other end threaded in thevothler side bar, yyherehyut-he distance between the side hars is accurately determined ancl means to look the tie rods in adjusted position, a clamping head, means to secure master and blank keys to said head in parallel relation to each other for Co-l operation with the side post and cutter respeetively, and means to support said head upon the carriage for movement laterally independently thereof and longitudinally with the carriage whereby convolutions will be formed by the cutter in the blank key exactl similar to the convolutions in the master ey.

FRANK WANKEL.