US1742254A - Lock - Google Patents

Description

look without in any Patented Jan. 7, 1930 EDWARD N. JACOBI, OF MILWAUKEE, CORPORATION, OF MILWAUKEE,

WISCONSIN, ASSIGNOR TO BRIGGS WISCONSIN, A CORPORATION OF AND STRATTON DELAWARE LOOK Application filed October 25, 1928. Serial No. 314,949.

g This invention relates to certain new and useful improvements in look structures and has as an object the provision of an improved lock assembly whereby the tumbler carrying cylinder and the casing or mounting head therefor may be die cast to eliminate machining to thus reduce costs and produce a cheaper wise impairing its ethciency.

Another object of this invention resides in the provision of an improved lockstructure which is so designed and constructed as to permit the ready securement of the tumbler carrying cylinder in its casing or mouting head and having cooperating means between the cylinder and casing whereby, after having once been assembled, the removal of the cylinder from the casing is prevented.

A further object of this invention resides in the provision of an improved lock structure of the character described having a detent action to definitely indicate the positions of the lock.

A still further object of this invention resides in the provision of a lock structure having an improved manner of drivingly'connecting the end cap wlth the cylinder whereby the end portion of the cylinder projected I through the casing or mounting head is not unnecessarily enlarged.

With the above and other objects in View which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, I have illustrated two complete. examples of the physical embodiment of my invention constructed according to the best modes I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is an end elevational view of a lock embodying my invention;

Figure 2 is a View, partly in. section and views,

partly in elevation, taken through Figure l on the plane of the line 2-2;

Figure 3 is a perspective view of the inner end of the lock casing or cylinder mounting head;

Figure 4: is a perspective view of the inner end of the lock cylinder and the cam shell detached therefrom;

Figure 5 is a View, similar to Figure 1, of a slightly modified form of my invention; and

Figure 6 is a view of the inner end of the lock, with parts in section and parts in elevation, said View being taken through Figure 5 on the plane of the line 66.

Referring now more particularly to the accompanying drawing, in which like numerals designate like parts throughout the several 5 represents a lock cylinder mounting head or casing having a central bore 6 ex tended therethrough and reduced in diameter at its outer end, as at 7 to provide a shoulder 8 which terminates in an annular recess or countebore 9 communicating with the bore 6, for the purpose later described. The wall of the bore 6 is provided with diametrical opposed, longitudinal slots 10, into which the tumblers 11 of a lock cylinder 12 extend when the key 13 is withdrawn from 14 of the cylinder. 7

The cylinder 12 is inserted in the casing or mounting head 5 from the rear, and has its outer end 15 slightly reduced to provide a shoulder 16 against which the inner end of an end cap member 17 abuts. The external diameterof the cap is substantially equal to that of the reduced bore 7 and the innerperipheral edge thereof is flanged laterally to provide an annular shoulder 18 which cooperates with the shoulder 8 to restrain axial movement of the cylinder through the reduced bore 7. An opening 19 is formed in the cap memher in register with the key opening 14 and one or more tongues or projections 20 extended inwardly from the inner peripheral edge of the flanged portion to engage in correspondingly shaped recesses 21 in the cylinder 12 to drivingly connect the cap with the cylinder. This manner of connecting the end. cap with the cylinder provides a neat structure and the key opening makes possible the use of the cap on a smaller type of lock.

The rear or inner end of the casing or mounting head 5 is counterbored, as at 22, to receive an annular flange or enlargement 23 formed on the inner end of the cylinder 12. A pair of spaced lugs or projections 2et extended from the adjacent or inner end of the casing, cooperate with the flange 23 to prevent rearward movement of the cylinder from the casing after assembly, the projections be ing of approximately V shape with their apeires disposed inwardly to overlie the countcrbore 22 and having their opposite sides reduced or cut away, as at 25, for a purpose later described.

The flange 23 of the cylinder is recessed or cut away, as at 26 and 27. so that in assembling the lock, the cylinder may be inserted in the casing or housing 5 from the rear, the recesses 26 and 27 permitting the flange to pass the projections 24. After the cylinder has been inserted, it is rotated to disalign the recesses 26 and 27 with the projections 24 and thus secure the cylinder in the casing, means, to be later described, being provided to prevent the realignment of the recesses and projections.

The extreme inner end of the cylinder is provided. with an eccentric cam 28 adapted to engage with the element to be locked. not shown, in the customary manner and it likewise has a notch or recess 29 which forms a continuation of the recess 27 to permit the insertion of thecylinder in the casing. The cylinder having been inserted and rotated to disalign the recesses 26 and 27 with the overhanging lips 30 of the projections 24 is then secured against removal by pressing a cam shell 31 of approximately ring shape onto the cam 28. The inner wall of the cam shell is serrated, as at 32, to form a non-rotatable connection with the'cam when it is pressed thereon, and swedged over tongues or projections 33 carried by the cam 28 prevent detachment of the cam shell. As stated, the shell 31 prevents the rotation of the cylinder to realign the recesses 26 and 27 with the projections 2% by forming a stop which engages the project-ions 24 as shown in Figure 1.

T 1e two positions of the cylinder with the tumblers 11 and slots 10 registering so that the key may be withdrawn are indicated by a detent action provided by a plunger 3 k mounted in a bore 35 formed in the inner end of the casing or mounting head 5 in communication with the counterbore 22 and at all times urged to engagement with the inner face of the flange 23 by a spring 36. The cylinder 12 is permitted a limited axial movement in the casing or mounting head, and the outer face of the flange 23 is provided with reduced portions 37 with which the over-hanging lips 30 engage when the cylinder is at either of its limits of movement, the

end walls of the recesses 37 being cammed or inclined, as at 38, to facilitate the movement of the raised ortions of the flange 23 under the over-hanging lips 30.

In Figures 5 and 6, a slightly modified structure is illustrated in which the rotation limiting action of the cam shell for retaining the cylinder within the casing or mounting head is replaced by a pin 39 secured in the inner end of the mounting head or casing after the cylinder has been inserted and rotated, to prevent the realignment of the recess s 26 and 27 with the projections 24. In this construction, the detent action is eliminated and the limits of rotation of the lock re defined by the pin 39 abutting the shoulders 40 of the flange 23.

From the toregoin description, taken in connection with the accompanying drawings, it will be readily apparent to those skilled in the art to which an invention of the character described appertains, that I provide a novel and improved lock assembly whereby the labor costs in assembling are reduced, and whereby the lock may be formed with two parts, namely, the cylinder and the mounting head or casing without the necessity of any machining operation other than the original formation thereof by die casting, and that a locl; is provided which has a detent action to indicate its aositions.

What I claim as my invention is:

1. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the casings bore and insertable therein from one end and means limiting the axial movement of the cylinder beyond the casings other end, stops carried by the casing and by which the cylinder passes while in a certain position with respect to the casing during assembling of the lock, and means for preventing movement of the cylinder to said position after the lock has been assembled whereby the cylinder is operatively secured in the casing.

2. In a lock including a lock cylinder casing, a lock cylinder rotatable in the casing and movable in the casing to diflerent positions, and detent means including a longitudinally movable member in the wall of the casing for indicating the different positions of the cylinder in the casin 3. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the bore and having limited axial movement therein, spring means normally urging the cylinder axially in one direction, and cooperating means carried by the cylinder and the casing to provide a detent action to determine the definite positions of the cylinder in the casing.

4. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the bore and having limited axial movement therein, a flange on one end of the cylinder,

projections carried by the casing and overhanging the flange, spring means normally yieldably urging the flange against the projections, and means carried by the flange and abutting the projections to provide a detent action indicating the positions of the cylinder in the casing.

5. A lock comprising a casing having a bore reduced in diameter at its outer end to form a shoulder and enlarged at its inner end, a lock cylinderinsertable in the casing bore from the rear, means on the outer end of the cylinder engaging the shoulder of the casing bore to restrain. movement of the cyl- V inder outwardly of the casing outer end, a

flange on the inner end of the cylinder, an inwardly extended projection carried by the rear end of the casing, the flange having a recess through which the projection passes in assembling the lock, and means preventing the registering of the recess with the projection after the lock has been assembled to prevent the detachment of the cylinder from the casing.

6. A lock,comprising a casing having a bore reduced in diameter at its outer end to form a shoulder and having a counterbore at its inner end, a lock cylinder insertable in the casing bore from the rear, means on the outer end of the cylinder engaging the shoulder of the casing bore to restrain movement of the cylinder outwardly of the casing outer end, a flange on the inner end of the cylinder, and disposed in the counterbore of the casing, a

' projection carried by the rear end of the easing and extended over said counterbore, said flange having a recess through which the projection passes in assembling the lock, and means preventing the registering of said recess with the projection after the lock has been assembled to prevent the detachment of the cylinder from the casing.

7. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the bore and insertable therein from one end and means limiting outward movement of the cylinder at its other end, a projection formed on the casing and extending into the bore, the lock cylinder having a recess which, when aligned with the projection, permits the insertion of the cylinder in the casing bore, and means preventing alignment of the recess and projection after assembling,

whereby the cylinder is operably secured in the casing bore.

8. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the casing bore and insertable therein from one end and means limiting axial movement of the cylinder beyond the casing other end, a projection carried by the casing and by which the cylinder passes while in a certain position with respect to the casing during assembling of the lock, a cam extended from r the lock cylinder, and a cam shell secured on the cam after the lock cylinder is assembled with the casing, said cam shell preventing movement of the lock cylinder to said cer tain position with respect to the casin 9. A look, comprising a casing having a bore, a lock cylinder insertable in the casing bore from its rear, means preventing movement thereof through its other end, a projection carried by the rear of the casing and extended into the bore, said lock cylinder having a recess through which the projection passes in assembling the lock, a cam carried by the lock cylinder, and a cam shell mounted on the cam after the cylinder is assembled with the casing, said cam shell preventing movement of the lock cylinder to a position aligning its recess with the projection Whereby the cylinder is operably secured in the casing.

10. In a lock including a lock cylinder casing having a bore, a lock cylinder rotatable in the casing bore and insertable therein from one end, a shoulder formed at the other end of the casing bore to prevent outward movement of the lock cylinder therethrough, a protecting cap inserted between the adjacent end of the lock cylinder and the shoulder, and a lug extended from the cap member and received in a recess formed in the lock cylinder to non-rotatably connect the cap with the lock cylinder.

11. In a lock including a lock cylinder casing having a bore reduced at one end to form a shoulder, a lock cylinder rotatable in the casing bore and having one end reduced to form a shoulder which cooperates with the shoulder formed by the reduced portion of the casing bore to restrain outward movement of the lock cylinder through the bore, a protecting cap positioned on the reduced end of the lock cylinder and having a flange disposed between said shoulders, and a projection extended from the flange and received in a recess formed in the lock cylinder inwardly of its shoulder to non-rotatably connect the protecting cap with the lock cylinder.

In testimony whereof I have hereunto affixed my signature.

EDWARD N. JAGOBI.

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