US623674A

US623674A - Pin tumbler lock

Info

Publication number: US623674A
Authority: US
Publication date: 1899-04-25
Anticipated expiration: 1916-04-25

Description

Patented Apr. 25, I899. F. & H. F. KEIL.

PIN TUMBLEB LOCK.

(Application filed Feb. 1 9

3 Sheets-Sheet I.

(No Model.)

70%!72 ass 9 I No. 623,674. Patented Apr. 25, I899. F. & H. F. KEIL.

PIN TUMBLER LOCK.

(Application filed Feb. 18, 1898.) (No Model.) 3 Sheets-Sheat 2.

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WITNESSES. f! Aid J WW1- BY dam/LL A TTOHNE).

No. 623,674. Patented Apr. 25, I899. F. &. H. F. KEIL.

PIN TUMBLER LOCK.

(Application filed. Feb. 18, 1898.)

(No Model.) 3 Sheets-Sheai 3.

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ilnrrnn STATES PATENT @rrrcn.

FRANCIS KEIL AND HENRY FRANCIS KEIL, OF NEW YORK, N. Y.

PIN-TUMBLER LOCK.

SPECIFICATION forming part of Letters Patent No. 623,674, dated April 25, 1899.

Application filed February 18,1898. Serial No. 670,828. (No model.)

To all whom it may concern:

Be it known that we, FRANCIS KEIL and HENRY FRANCIS KEIL, citizens of the United States of America, and residents of the borough of Bronx, city, county, and State of New York, have invented new and useful Improvements in Pin-Tu1nbler Locks, of which the following is a specification.

Our invention relates to the class of looks known in the art as pin-tumbler locks.

Heretofo re in the manufacture of this class of looks it has been the practice to cast arough blank for the key-hub and also a rough blank forthesurroundingtumbler-cylinder. Itwas then necessary to drill suitable openings or seats in each blank for the pin-tumblers, bore the opening in the tumbler-cylinder for the key-hub, plane or cut the keyway in the keyhub, cut screw-threaded holes in the rear of the key-hub, cut external peripheral screwthreads on the cylinder, and trim and finish the hub and cylinder in order to adapt the two parts to work smoothly together. In manufacturing locks of this character it is apparent that the cost of production is very great owing to the many different operations necessary before the key-hub and tumbler-cylinder are properly constructed and in condition to properly cooperate.

The object of our present invention is to avoid and dispense with all these (at present) necessary operations and to produce a lock of this character complete and finished by a single operation. The great expense and labor involved in the various mechanical steps and operations at present necessary in order to provide the essential characteristic features of construction are thereby dispensed withand the cost of production greatly lessened. Further than this the polishing and finishing of the face of the look at present necessary can be avoided, as the entire external surface of the lock is provided with a smooth and finished appearance at the same time that it is provided with the essential features of construction.

We will now refer to the drawings forming a part of this specification for a more detailed description of the invention.

Figure 1 represents a longitudinal sectional view of the pin-tumbler cylinder as it is removed from the mold. Fig. 2 is a perspective view of such cylinder. Fig. 3 is a front view, and Fig. 4 a longitudinal sectional view, of the key-hub. Figs. 5 and 6 are respectively a rear and a sectional view of said key-hub. Fig. 7 is a plan View of a mold used in constructing the tumbler-cylinder. Fig. 8 is a view of the mold, partly in section, on line 2 2 of Fig. 7. Fig. 9 is a view, partly in section, of the mold for the keyhub with the core for the keyway in position; and Fig. 10 is a similar view with the core removed. Fig. 11 is a horizontal section on line 13 13 of Fig. 9,'and Fig. 12 is a similar sectional view on line 14 14 of Fig. 9.

In the above figures, A represents the pintumbler cylinder provided with the integral face-plate a.

a is the opening for the rotary key-hub B. Intersecting this opening is a series of openingsa forming tumbler-seats for the usual pin-tumblers and their springs. Surrounding the rear end of the external periphery of the cylinder A is the screw-thread a for se curing the cylinder to the lock-case. The usual side recesses in the side of this cylinder for the retaining means are shown at a and the recess at the top of the tumbler seats or openings for the spring-retaining plate is shown at 04 The key-hub B is provided with the longitudinal recess for the key at b, and this may be of any suitable shape, and the usual screwholes in the rear of the key-hub for the screws for'securing the collar or cam to the hub are shown at 12 The various features of the key-hub and tumbler-cylinder above specifically referred to by reference-letter-such as the tumbler seats or openings, keyway in the key-hub, screw-threads, opening in the tumbler-cylinder for the key-hub, &c.have heretofore been added to the rough blanks after such blanks have been removed from the mold, and it has usually required a separate and distinct mechanical operation to provide each of said features of construction. This necessarily required considerable time and comparatively great expense in order to produce the complete and finished tumbler-cylinder and key-hub and have them in condition to be assembled for cooperation. We avoid and dispense with all these different mechanical operations at present necessarily involved in completing the construction of said key hubs and cyliuders-su ch as cutting recesses,screwthreads, tumbler openings or seats, the keyway, &e.by providing each of said parts to wit, the key-hub and tumbler-eyliuder with all the necessary operative characteristic features of construction complete and finished in the process of casting, whereby upon the removal from the mold both the key-hub and tumbler-cylinder are complete, smooth, and finished, and ready-for operative assembling. \Ve thereby produce an article of manufacture never before produccd-i. c., a castmctal tumbler-cylinder and key-hub formed complete and finished in the process of casting and ready for cooperation without additional change in construction. The utility and advantages of this tumbler-cylinder and key-hub formed complete and finished in the process of cast ing will be apparent. The labor saved in their production and their comparative cheapuess will be perfectly obvious to those familiar with the art. \Ve have illustrated in Figs. 7 to 12 the construction of molds employed by us for producing this complete and finished tumbler-eylinderand keyhub. It is obvious, however, that this exact construction of mold is not essential to the production of our complete and finished cylinder and key-hub, as it can be varied and changed in many particulars. Itis onlyillus- 1 rated, however, in order to disclose our means of carrying out our invention.

F is a bed-plate for the cylinder-mold, having a recess on its top side running from end to end and having beveled sides to receive the sections of the mold G and keep them in place. The center of the recess is provided with a circular recessf to receive the circular die f Die f has a circular recess f to receive the end of the core f*. The core is provided with the pin-hole formers f.

I is the bed-plate of the key-hub mold, having a recess in its face provided with inwardlybeveled sides, in which slide the two sections II II of the mold. In the center ofthe recess is provided a circular recess 1' to receive the disk i which disk has raised shoulders across the center of its rear end to form a shed to receive the usual cam that fits on the keyhub. At each side of the disk is provided a J is the hub-core and is provided with the pin-hole studs to form the pin-holes in the key-hub to receive the pin-tumblers.

K is the keyway-former for the key-hub and may be of any desired shape and form the keyway of the key-hub which runs longitudinally through the key-hub.

It will be seen that these molds are formed of several detachable parts, and when such parts are brought into proper position the metal or other material of which the cylinder and hub are made is poured into the mold at the opening 71 A more detailed description of the construction of this mold is not deemed essential at this time, since it is thought from the generaldisclosure here given the construction and operation will be sufficiently understood to aid in the understanding of this invention. The construction of this mold is not herein claimed, since it forms the subject of another application, filed by us September 3, 1898, Serial No. 690,216.

Having described our invention, what we desire to claim as new is 1. As an article of manufacture, a tumblercylinder for pin-locks having the pin tumbler openings formed therein complete and finished in the process of casting, substantially as set forth.

2. As an article of manufacture, a tumblercylinder for pin-locks, having all the essential features of construction, such as the tumbleropenings,key-h ub opening,screw-threads and recesses all formed complete and finished in the process of casting, substantially as set forth.

As an article of manufacture, a key-hub for pin-locks made in a single piece and having the keyway-slot and tumbler openings or seats formed complete and finished in the process of casting substantially as described.

4:. As an article of manufacture,,a pin-tumbler cylinder and key-hub, each cast complete and finished with the usual tumbler-seats, keyway and screw -threads whereby such parts as cast are adapted for cooperation without additional change in construction, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signed our names, in presence of two witnesses, this letill day of February, 1898.

FRANCIS KEIL. v HENRY FRANCIS KEIL. \Vitnesses:

ADAM E. SCI'IATZ, WM. L. ALLEN.