Untitled record

(Application filed Jan. 18, 1899.) (No Model.)

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THE NORRIS PETERS CO·. PHOTO-LITHO.. WASHINGTON, 0- C.

United States Patent Office.

HENRI BRISSELET, OF GENEVA, SWITZERLAND, ASSIGNOR TO JULES TERRISSE, OF SAME PLACE.

METHOD OF MAKING SAFETY-LOOKS.

SPECIFICATION forming part of Letters Patent No. 623,701, dated April 25,1899.

Application filed January 18,1899. Serial No, 702,613. (No model.)

To all whom it may concern:

Be it known that I, Henri Brisselet,mechanician, a citizen of the Republic of Switzerland, residing at Geneva, in the Republic of 5 Switzerland, have invented certain new and useful Improvements in Safety-Locks and Keys Therefor, of which the following is a specification.

The invention consists of a combination of io means for constructing in a cheap and easy manner a safety-lock and its key.

One portion of the improved lock forms the matrix or bottom die, by means of which the special form and configuration of the key and 15 of a second portion of the lock are obtained by stamping, the manufacture of similar keys being therefore rendered difficult when the lock is finished without taking the said lock to pieces.

The portion of the lock which, as explained above, is used as a matrix or bottom die for stamping the corresponding key is provided with one or more suitable straight - lined notches or grooves, which, if there are more 25 than one, must be parallel to one another.

The said notches or grooves may be made of any suitable section whatever, so as not to be easily imitated, such notches or grooves being made in the said piece of the lock by means of 30 any suitable tool—for instance, by means of suitable grinding - wheels—and so as to be quite different in each case—that is to say, in each of said pieces of different locks. The said notches or grooves may differ by the shape or 35 configuration of their section, by the distance between two adjacent notches or grooves, the depth of the same, and so on, and all these differences will be exactly reproduced in the key and the second portion of the lock, and 40 no key will act upon the lock in question if it does not reproduce exactly the said notches or grooves.

The above-mentioned two portions of the lock which are provided with corresponding 45 notches or grooves are fixed in the said lock in such a position with regard to each other that the corresponding key may be slid with little friction between the same, the said key being preferably made of thin sheet metal, so 50 that the space between the said two notched portions of the lock will be so small as to render difficult the introduction between the same of any tool or wire for the purpose of opening the lock. The said notched portions of the lock and correspondingly-notched key 55 are combined with a spring or spring-bolt located within the lock and intended to lock the same in any well-known manner and to be unlocked by the mere introduction of the key between the two notched portions of the 60 lock. One of the said two notched portions of the lock may in some instances be fixed to the lock and the other one be formed or fixed on the bolt of the lock or they may be formed or fixed both to the lock or both to the bolt, 65 their respective positions in the said lock being in any case exactly predetermined by the casing of the latter, so as to insure the working of the key in the above-described manner.

The accompanying drawings show by way 70 of example one form of the invention.

The improved lock is supposed in this case to be intended to lock the wheel of a bicycle by means of a chain to the frame of the same when the machine is to be held inoperative. 75

In the drawings, Figure 1 is a plan view of the lock and chain when locked. Fig. 2 is a plan of the lock, the casing of which is shown in longitudinal section. Fig. 3 is a plan of the corresponding key.. Fig. 4 is a side ele- 80 vation of the same. Fig. 5 is a longitudinal section on the line 5 5 of Fig. 1. Fig. 6 is a cross-section on the line 6 6 of Fig. 5. Fig. 7 is a longitudinal section of the lock similar to Fig. 5, but with the key shown in its un- 85 locking position. Fig. 8 is a section through the line 8 8 of Fig. 7. Fig. 9 is a longitudinal section of the lock similar to Fig. 5 after the withdrawal of the bolt. Fig. 10 shows the bolt removed from the lock. go

In all the figures of the drawings the same numerals of reference refer to the same parts.

The improved lock is composed in the form shown by way of example of a casing made of two portions 7 and 8, firmly fixed to one 95 another by rivets, solder, or by any other suitable means whatever, of a bolt 3, intended to be locked into the said casing by means of a spring 6, and of a key 2, intended to disengage the said spring 6 from the bolt 3 when the 100

623,701 lock is to be opened. The chain 9 has one of its ends firmly connected to the casing of the lock and its other end firmly connected to the bolt 3.

In the improved lock shown in the drawings the bolt 3 is that part of the invention which has been called above the “first portion” of the lock, which has been used as a matrix or bottom die, and the portion of the casing 7 ro which is marked 1 in the drawings is what has been called above the “second portion” of the lock, the form of which has been obtained by stamping the said portion 1, together with the key 2, formed of sheet metal, 15 into the matrix 3, as shown in Fig. 8.

The longitudinal grooves 4 of the lock 3 are made of any irregular or regular shape whatever, to which the key 2 and the portion 1 of the casing of the lock are exactly configurated, 20 having been stamped with one another. The portions 7 and 8 of the casing are fixed to one another in such a position that the bolt 3 and key may exactly slide between them, as shown in Figs. 7 and 8. The bolt 3 is further pro25 vided witli a transverse notch or groove 10, Figs. 7 and 10, into which engages the end of a spring G, fixed to the casing of the lock, as shown in Fig. 5, whenever the said bolt 3 is engaged into the said casing without the key 2. 30 Said spring is divided longitudinally, so as to form a plurality of spring-fingers. If one engages then the key 2 between the said bolt 3 and the notched portion 1 of the casing of the lock, as shown in Fig. 7, the spring G is dis35 engaged out of the notch or groove 10 and the bolt 3 may be removed out of the lock, as shown in Figs. 9 and 10.

It is to be well understood that I do not limit myself to the special construction of the lock I have shown and described by way of 40 example.