US1431735A - Sheet-metal tumbler lock - Google Patents

Description

.l. B. FREYSINGER.

SHEET METAL TUMBLER LOCK.

APPLICATION FILED FEB- 17. I922.

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Fatented Unto TN, TFFE;

JUJBIN B. F'RJET'SINGER, OF'STANEFURID, CUNNECTTCWT, MFSIG'NOR TO THE YALE & TOWNE MANUFACTURING COMPANY, F STAMFORD, CONNECTICUT.

fiHElET-METM TUNIFLEN LUCK.

application filed February 1?, rear. semi No. team.

To all whom it may concern:

Be it known that T, J OHN B. Fnnrsmenn, a citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Sheet- Metal Tumbler Locks; and T do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

M invention relates to an improvement in sliding tumbler locks, the object being to simplify and cheapen the construction by making the cylinder, tumbler guide and tumbler lock casing of sheet metal stamped or pressed into shape, thereby avoiding the more expensive process of machining parts made ofcast metal.

With this object in view my invention consists in the parts and combinations of parts as will be more fully described and pointed out in the claims.

lln the accompany drawings; Figure 1 is a view showing the lock assembled on the face of a lock case, the cylinder and parts therein being in elevation; Figure 2 is a view in vertical section through Figure 1, the key being shown in elevation; Figure 3 is a rear end view of the cylinder, case and tumbler guide; Figure l is a view in transverse section of the latter showing one of the tumblers; Figure 5 is a viewin transverse section of the cylinder, case and tumbler guide looking toward the front or outer end of the latter; Figure 6 is a view in perspective of the cylinder; Figure 7 is a similar view of the tumbler guide; Figure 8 is a view of one of the tumblers; Figure 9 is a view of the guide or bearing ring that fits within the case and has bearing in the face plate of the lock; Figure 10 is a view in perspective of the case which carries the tumbler guide; Figure 11 is a view in elevation of the case and Figure 12 is a view in horizontal section of Figure 1 the key being omitted. v

15 represents the face plate of a lock, and 16 is the tumbler lock casing secured to the face plate 15 in any approved manner, but preferably by providing the cylinder with tongues (not shown) passing through the plate 15 and upset in the usual and well known manner.- The cylinder 17 is made of sheet metal bent into cylindrical form as shown-and provided at 1ts top and bottom with the extension 18 forming pockets 19 to receive the ends of the flat plate shaped tumbler 20 which are also struck u sheet metal. The sides of the extension 18 are preferably cut away, as shown at 21 in Flgures 4 and 6, and the cylinder is provided at its inner end with the integral tongue 22 adapted to be passed through slots in the face 15 of the lock and upset as shown in Figure 12, to secure the cylinder to the face of the lock.

The tumbler guide 23 is made from a sheet metal strip bent at its center, as shown in Figure 7 to form two separated parallel members, fluted or grooved to form guide ways 24: for the tumblers 20. Any number of tumblers may be used, and the front free end of the two side members of said guide are turned outwardly and provided with tongues 25 which are sprung or forced into slots 26 in the case 27 adjacent the front end of the latter. The case 27 is cylindrical as shown and is preferably stamped or spun from sheet metal and is constructed to fit and turn within the cylinder 17. Its front end 27" is closed except for the key slottherein, and is slightly reduced in diameter to fit within a correspondingly shaped opening in the casing 16, the shoulder 28 formed by reducing the front end of the case 27 resting against the inner face of the casing 16, while the rear end of said case 27 rests against the front face 15 of the lock case, the assemblage being such however that it and its connected tumbler guide 23 are free to turn therein when the proper key 29 in introduced into the slot in the front end of said tumbler case 27.

The cylindrical case 27 is provided with diametrically opposed slots 27 as shown in Figure 10 to permit the'tumblers to be moved lengthwise by the key 29.

The rear bent end of the tumbler guide projects to the rear of the face plate 15 for the attachment of the cam ordinarily employed for actuating the mechanism of the lock.

from V There is a tumbler 20 for each guide way 24, and each tumbler is provlded centrally with a ke slotfor the passage of the key 29. The key is preferably slotted as at 31 at one side, and the tumbler guide 1s also preferably provided with a plurality of inward projections32, and the face plate 27" v of the case- 27 with a similar projection 33 (shown in Figure 5) located in line with the 'rojection on the tumbler guide 23 so as to o struct or prevent the'entrance of any key or instrument not slotted to aline with and receive said projections. The inner end of the tumbler case 27 carries and is *supported by the guide ring 34, which latter 1s secured in, notches in the-cam end of the tumbler guide. In assembling, this ring 34 is forced into oval form and slipped over the cam end 30, and when "released assumes its circular form and becomes permanently seatedin the notches and projects through the face plate 15 and has bearing in the latter.

All of these parts are made of sheet metal, and after having been properly assembled in the tumbler lock case 16 are held against dis lacement by the means described.

11 the operation of the lock the key 29 is inserted and shifts or lifts the tumblers to the position shown in Figure 2, so that their ends which are curved, conform to and aline with-the curvature of the cylinder 17, thus permitting tumbler guide and case toturn together as a unit and actuate the look. A key or other instrument not especially designed for the lock will move the tumblers up or down and project them into the pockets 19, thus preventing the tumbler guide from turning, and when the key is withdrawn the lower ends of the tumblers drop into the lower pockets and lock the tumbler guide in place.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described but,-

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is

1. As a new article of manufacture a tumbler lock comprising a cylinder having pockets to receive the tumblers, a tumbler guide having a rear bent end for the attachment of means for actuating the mechanism of the lock, the said parts being made of sheet metal stamped or pressed into shape, and a cylindrical case secured to and carrying the tumbler guide and mounted to turn in the cylinder.

2. As a new article of manufacture a tumbler lock comprising a cylinder having pockets to receive the ends of the tumblers, tumblers slotted for the passage of a key, a tumbler uide having a bent rear end projecting at t e rear of thecylinderfor the attachment of means for actuating the mechanism of the lock, and a cylindrical case enclosing the tumbler guide and secured to the latter whereby they rotate in unison, all of said parts being made of sheet metal.

3. As a new article of manufacture, a tumbler lock comprising a cylinder having pockets to receive the ends of the tumblers, a tumbler guide Within the cylinder and made from a sheet metal strip bent upon itself and fluted or grooved to form the tumbler guides, a series of tumblers carried by said guide and movable therein and a casing for said cylinder.

As a new article of manufacture, a cyl- '7 inder made of sheet metal and provided with pockets to receive the ends of the tumblers, a tumbler guide made of sheet metal and having a rear bent end, a series of inderhaving pockets to receive the ends of the tumblers, a tumbler guide made from a continuous strip of sheet metal bent upon itself, the two members of said strip being fluted or grooved to receive the tumblers, slotted tumblers mounted to slide in said grooves, and a case mounted to rotate in said cylinder and carrying the tumbler guide, the said case having a key slot in its outer end, and also having slots therein for the passage of the tumblers.

s a new article of manufacture, a tumbler lock comprising a sheet metal cylinder having oppositely disposed pockets to receive the ends of the tumblers, slotted tumblers, a sheet metal guide for the tumblers composed of a strip of metal folded and fluted to receive the tumblers, a cylindrical case secured to the guide and slotted to permit of longitudinal movement of the tumblers, the said case having a key slot at its outer end, and forming a housing for said guide, and a casing enclosing the cylinder.

7. As a new article of manufacture, a tumbler lock composed of a casing adapted to be secured to the face plate of a lock and provided with an opening, a sheet metal cylinder within said casing and secured to said face plate, the said cylinder having oppositely disposed pockets, a cylindrical case mounted to rotate in said cylinder and having oppositely disposed slots, tumbler guides secured to and movable with said cylindrical case the latter having a key slot in its outer end, and sheet metal tumblers car- 5 ried by said guide the said tumblers being slotted for the passage of the key;

In testimony whereof, I- have signed this I specification in the presence of two sub- SGI'lblIlg wltnesses.

JOHN B. FREYSINGER.

Witnesses:

RAYMOND H. SULLIVAN, JAs. L. INGALLS.

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