US1691529A - Key lock - Google Patents

Description

Patented `Nov. 13, 1928.

UNITED vSTATES.

PATENT oFFlcE.

WALTER R. SCHLAGE, F SAN FRANCISCO, CALIFORNIA, ASSIGNOR T0 SCHLAGE LOCK` COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA.

KEY Loox.

Application led January 24, 1927. Serial No. 163,024. L

Thisv invention relates to locks and especially that type known as key actuated tumbler locks.

The object of the present invention is to 6 generally improve and simplify the construction and operation of a lock of the character described; to provide a tumbler lock in which all parts may be`constructed from stamped metal; to provide a tumbler lock which permit-s the formation of a great number of key actuated locking combinations; to providea tumbler carrier in-Which the tumblers may project from opposite sides thereof so as to yobtain a double locking effect; to provide tumblers which are reversible in the tumbler carrier; to provide a tumbler carrier in which certain tumblers are normally held in a projected or locking position while others are normally held in a retracted position and further to provide a. tumbler carrier in which tumblers are guided at both ends and rigidly supported against displacement. y

The invention is shown by way of illustration in the accompanying drawings, in

which Figure 1 is a sectional view of an ordi-v nary bolt lock taken on `the line I-I of Figure 2, 'l

Figure 2 isa transverse section `of the bolt lock taken on the line II--II of Figure 1, said section showing the application of thetumbler lock, whereby the bolt is actuated,

Figure 3 is a centra] longitudinal section of the tumbler lock forming the subject matter of thefpresent application, said view being partly broken away to show a` portion of a key when inserted,

Figu lock taken on the linel IV-IV of Figure 2,

Figure 5 is a perspective 'View of the tumbler'carrier,'said view being partly broken away, 455 Figure 6 is a perspective View showing `the type of tumbler which is normally held in a projected position,

Figure 7 is a perspective view showing the other type of tumbler employed, which is 0 normally held in a retracted position,

Figure 8 is a plan view of the type of key employed in conjunction with a tumbler lock of this character.

Referring to the drawings in detail and re 4 is a crossfsection of the tumbler particularly to Figures 1 and 2, A indicates an ordinary form of lock housing in which is slidably mounted a locking bolt B. The

bolt proper is provided with a plate eXtension 2 to which is attached a spring 3. This spring serving the function of normally holding the bolt in projected or locking po-` sit-ion.

The inner end of the plateis transversely slotted as shown at 4 and a pin 5 projects into the slot. This pin is carried by a circular shaped head member 6 which is adapted to be rotated, said head when rotated causing a projection or retraction of the bolt in the usual manner.

. The part of the mechanism so far described is a standard form of lock mechanism and is not patentable. It ismerely described and illustrated to show one ofy cured Within the cylindrical shaped housingis a sleeve 48 and formed in opposite sides thereof are longitudinally extending slots- 9 and 10 with which the tumblers hereinafter to be described, are adapted to interlock.

' Turnably mounted within the sleeve and the housing C and attached to the head member 6 is a tumbler carrier generally indicated at D (see Figure 5). This carrier supports a plurality of tumblers such as indicated at E (see Figures 6 and 7) and it is also provided with a keyway 11 for the reception of a key 12, suoli as shown in Figure 8. The tumbler carrier consists of a pair of interspaced plates 13 andy 14 which are ribbed along-their longitudinal -edges as at 15 and 16 to stiffen and straighten thesame. These plates are secured at one end to the head member 6 and at the opposite end to -an exterior head member 6a, in the end of which is formed a slot 6b through which the j key 12 may be inserted.

The head members 6 and 7 do not only y and the plates are slotted transversely on opposite sides of the ribs, as indicated at 19 and 20. These slots are provided for the reception of the tumblers E andA they furthermore form guides for the tumblers wherein they are rigidly supported against displacement. The tumblers are best illustrated in Figures 4, 6 and 7 and as two types of tumblers are employed, each type will be described. l

Referring to Figure 6, it will be noted that the tumbler there illustrated consists of a flat plate which-is stamped or cut out to form two arms such as indicated at 21 and 22 and a connecting member23. The arm 21 is provided with two pins such as shown at 24 and 25. The pin 25 projects outwardly between the plates 13 and 14 as shownin Figure 4 and it is adapted to project a suicient distance to enter one of the longitudinal slots 9 or 10 formed in the sleeve 8. rIhe pin 25 in other words forms the locking pin of the tumbler and the pin 24 will hereinafter 'be referred to as the spring retaining pin. The plate 23 o r connecting member between the arms 21 and 22 of the tumbler is disposed on one side of the plate 14. Its outer peripheral edge is rounded to substantially engage the inner surface of the sleeve 8 and the arms 2l and 22 yproject through the. slots 19 and 20 of the carrier plates.

A bar 30 extends from end to end of the plate 13 and is secured thereto. This bar is provided with a plurality of pins 31 and 32 in its longitudinal edges and these pins co-operate with the pins 24 on the tumblers to receive and retain springs 33 whereby the pins 25 on the respective tumblers are held either in projected or retracted position with relation`to the slots 9 and 10 in the locking sleeve 8.

yThe' tumbler illustrated in Figure 6 and just described is reversible and the locking pin 25 carried thereby `may, accordingly, project into one or another of the slots 9 and 10 depending upon the position of the tumbler within the carrier. The tumbler is normally held in locking position by means of a spring 33, this spring being linterposed between the pin 24 and the pin 31, as shown in Figure 4, but if the tumbler is reversed the spring will be interposed between the pin 24 and the pin 32 on the opposite side of the bar 30. In either instanoethe pin 25 is normally held in locking position, due to the outward pressure of the spring.

This tumbler will hereinafter be referred i Figure 6, the only difference being that the pin indicated at 24a is placed on the arm 22 instead of the arm 21 as shown in Figure 6. The type of tumbler shown in Figure 7 is also reversible, but it will normally be held in a position where the pin 25a is retracted, this being due to the fact that the pressure on the spring 33 pulls the pin 25 inwardly due to the position of the spring retaining pin 24a, while the spring employed in connection with the tumbler shown in Figure 6 normally presses the locking pin outwardly. Y

Two distinct types of tumblers are, accordingly, employed. The typel shown in Figure 6 which carries locking ,pins which are normally projected and the type shown in Figure 7 which carry locking pins which are normally retracted. This is important a's it materially increases the range of. key actuated locking combinations which may be obtained. A reversibility of the tuinbler plates is also important as it further increases theynumber of locking combinations which itis possible to obtain. of the tumbler plates is also' of further importance as .it permits the locking pins to project from opposite sides of the tumbler carrier, thus producing a double locking effect. j

In actual operation, the vtumbler carrier Reversibility with the tumblers mounted therein assumes -V will be of the type shown in Figure 7. yThis is important as it is desirable to retain the tumbler carrier 4against rotation until the key has been fully inserted. 'v

The type of key employed is such as shown in Figure 8. .It is inserted endwise `through the slot 6b Aand its longitudinal edges are provided with cam faces and recesses such as shown atf40. These faces engage thejinner or side face 21a of the arms 22 on the tumblers shown in Figure 6, and they engage the inner surfaces 2lb of the arms 21 on the tumblersvshown in Figure 7, thus causing projection of the types of tumblers shown in Figure 7, while the key is being inserted, and retraction of the tumblers shown in Figure 6.

When the key is fully inserted, all the tumblers Will be retracted or Withdrawn with relation to slots 9 and 10 and the tumbler carrier Will then be free to rotate. Such rotation is, of course, transmitted to the head members 6 and the pin 5 carried thereby Will thus' actuate the plate 2 and the bolt b and either retract or project the same. The housing C and the tumbler carrier and tumblers supported thereby may, of course, be employed on other types of locks.

I also Wish it understood that changes in the general structure ,employed may be made Within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patentiszi t l. In a lock of the character described, a housing, a mounted therein, a plurality of radially movable tumblers mounted in the carrier, means in opposite sides of the housing With Which the tumblers are adapted to interlock, and means engaging the tumblers and normally maintaining cert-ain tumblers projected for locking engagement and other tumblers retracted and out of locking engagement( 2. In a lock of the character described, a housing, a rotatable tumbler carrier mounted therein, a pluralityV of radially movable tumblers mounted in the carrier and having locking members projecting from one end only, said tumblers being reversible sothat their locking members may project either from one side or another of the carrier, and means in opposite sides of the housing With which the locking members on thetumblers are adapted to interlock.

3. In 'a lock of the character described, a housing, a rotatable tumbler carrier mounted therein, a plurality of radially movable tumblers mounted in the carrier and having locking members projecting from opposite sides of the carrier, said tumblers being reversible so that theirlocking members may project either from one side or another of the carrier, meansQ in opposite sides of the housing With which the locking members on the tumblers are adapted to interlock,`, and means engaging the tumblers and normally maintaining certain tumblers in'projected locking engagement and other tumblers retracted and out of locking engagement. n

4. In ha lock of the character described, a housing, a rotatable tumbler carrier rotatable tumbler carrier mounted therein, a plurality of .tumblers `mounted in the carrier and having locking Which has a plurality of recesses and projections formed in its longitudinal edges, said projections adapted to project the normally retracted tumblers during. insertion of the key and the recesses in the longitudinal edges consisting a retraction of said tumblers when the key is fully inserted and the projections on the longitudinal edges of the key.adapted to retract the normally projected tumblers when the key is inserted.

5. In a lock ofthe character described, a cylindrical shaped housing, a tumbler carrier rotatably mounted therein, said carrier consisting of a pair of interspaced elongated plates, ahead member on each end of the plates^ and turnabletherewith, one of said head members having a slot formed therein to permit insertion of the key and the. space i formed between the plates forming a re- ,ceptacle for Vthe key When inserted, said plates being transversely slotted, a plurality lof tumbler plates insertible in the transverse slots and radially movable therein, springs engaging each tumbler plate, and holding each plate in a normal position, and locking members on each tumbler plate.

6. In a lock of the character'described,

a tumbler carrier, a plurality of plate-like tumblers radially movable therein, each tumbler having a locking pin, and springs mounted on the carrier and engaging the tumbler plates, said springs adapted to retain certain tumbler plates in a position Where the locking pins are projected and other tumbler plates `positioned Where the locking pins are retracted.

7. .In a lock of the character described, a tumbler, said tumbler consisting of a flat plate having a shape substantially similar to a circular disc cut in half so as to present a straight front edge kand a rounded back edge, a pair of substantially parallel arms projecting at right angles from the straight edge of the plate, a spring retaining pin Jformed on one of the arms, and a locking pin formed on one of the arms, substantially as described.

WALTER R. sci-Iman.

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