US2587739A - Tumbler lock plug - Google Patents

Tumbler lock plug Download PDF

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Publication number
US2587739A
US2587739A US690261A US69026146A US2587739A US 2587739 A US2587739 A US 2587739A US 690261 A US690261 A US 690261A US 69026146 A US69026146 A US 69026146A US 2587739 A US2587739 A US 2587739A
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US
United States
Prior art keywords
cylinder
grooves
opening
lock
walls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US690261A
Inventor
Kunz Paul Albert
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Mefina SA
Original Assignee
Mefina SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US2587739A publication Critical patent/US2587739A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B29/00—Cylinder locks and other locks with plate tumblers which are set by pushing the key in
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/7486—Single key
    • Y10T70/7508—Tumbler type
    • Y10T70/7559—Cylinder type
    • Y10T70/7588—Rotary plug
    • Y10T70/7593—Sliding tumblers
    • Y10T70/7599—Transverse of plug
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/7486—Single key
    • Y10T70/7508—Tumbler type
    • Y10T70/7559—Cylinder type
    • Y10T70/7667—Operating elements, parts and adjuncts
    • Y10T70/7684—Plug

Definitions

  • TUMBLER LOCK PLUG Filed Aug. 13, 1946 WWW/6 Patented Mar. 4, 1952 UNITED: STATES assgase TUMBLER. LOCK.- PLUG V PaulAlb'ert K-i nz Geneva, switaerland, assig'n'or to. Mefina 8.. Ag, Binninge'n'; a" corporation of Switzerland".
  • the present invention has for its subject a method of production of a cylinder for a security lock provided with members movable perpendicularly to the axis of the cylinder.
  • This method tends to reduce the disadvantages referred to by the fact that grooves are machined in a body having a central opening of approximately rectangular cross-section, these grooves being provided of such depth that they communicate directly with the internal opening of the body through the two smaller sides of its rectangular cross-section so as to allow the passage of movable members of the lock, and that the lateral walls of the opening, and of the grooves, form guides for these members.
  • the present invention also has for its subject a cylinder obtained by this method and which is distinguished from known cylinders by the fact that it is formed by a portion of a body having an internal opening of approximately rectangular cross-section and a number of grooves equal to the number of movable members with which the lock is provided, these grooves communicating directly with the internal opening of the body through the two smaller sides of the rectangular section of the latter, so that the lateral walls of the opening and of the grooves form guides for the said movable members.
  • Fig. 1 is a perspective view of a lock cylinder with parts broken away;
  • Fig. 2 is a perspective view of a lock cylinder with tumbler mounted therein.
  • the cylinder is formed by a body portion I provided with an internal opening 2 co-axial with the longitudinal axis of the body and having a cross-section approximately in the form of a rectangle.
  • Grooves 3 are machined in the outer wall of the body in a number equal to the number of movable members with which the lock is to be provided. The depth of these members is such that they communicate directly with the internal. opening of the body through the two small sides of the rectangular section of this opening?
  • the two small sides of the internal opening 2 are formed by a sector of a cylinder co-axial with the body, in such a mango ner as to allow machining of the grooves 3 by shaping without risk of deterioration of the tool at the moment at which it enters the internal opening of the body.
  • a cylinder for a security lock provided with a series of tumblers movable perpendicularly to the axis of the cylinder, in'which the said cylinder is formed by a body portion having an internal axially extending key opening oblong in cross-section and having narrow and wide walls,
  • circumferential grooves are of a width equal to the thickness of the tumblers and of a depth greater than 50 the difference between the external diameter of the cylinder and the transverse dimension of the wide walls of the key opening, but of a depth less than the difference between the external diameter of the cylinder and the transverse dimension of the narrow walls of the key opening so that the circumferential grooves communicate ing of oblong cross section having two narrow walls and two wide walls extending axially through the plug and symmetrically disposed relative to the axis of theplug, and forming a plurality of axially spaced tumbler chambers in said cylinder by machining a plurality of axially spaced, circumferentially extending grooves of rectangular cross section in the external surface of the cylinder of a width equal to the thickness of the tumbler chambers and of a depth greater than the thickness of the material of the cylinder between the narrow walls of

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Description

March 4, 1952 K N 2,587,739
TUMBLER LOCK PLUG Filed Aug. 13, 1946 WWW/6 Patented Mar. 4, 1952 UNITED: STATES assgase TUMBLER. LOCK.- PLUG V PaulAlb'ert K-i nz Geneva, switaerland, assig'n'or to. Mefina 8.. Ag, Binninge'n'; a" corporation of Switzerland".
ApplicationzAugu'sti 13, 1946,. erial No. 690,2 61' In Switzerland September 3-, 1945 I 2*Claims. (c1. ro ster vIn cylinders for security locks provided with blades placed in position by a key for allowing rotation or the locking of the'cylinder, the blades are generally guided by elements stacked. one upon the. other and held: rigidly in positionby clamping members.
The stack of elements forms the cylinder and it will be evident that their machining on the one hand and their assembly on the other hand, is extremely expensive and requires a relatively long period of time.
The present invention has for its subject a method of production of a cylinder for a security lock provided with members movable perpendicularly to the axis of the cylinder. This method tends to reduce the disadvantages referred to by the fact that grooves are machined in a body having a central opening of approximately rectangular cross-section, these grooves being provided of such depth that they communicate directly with the internal opening of the body through the two smaller sides of its rectangular cross-section so as to allow the passage of movable members of the lock, and that the lateral walls of the opening, and of the grooves, form guides for these members.
The present invention also has for its subject a cylinder obtained by this method and which is distinguished from known cylinders by the fact that it is formed by a portion of a body having an internal opening of approximately rectangular cross-section and a number of grooves equal to the number of movable members with which the lock is provided, these grooves communicating directly with the internal opening of the body through the two smaller sides of the rectangular section of the latter, so that the lateral walls of the opening and of the grooves form guides for the said movable members.
A cylinder obtained by the method is shown diagrammatically and by way of example in the accompanying drawing in which:
Fig. 1 is a perspective view of a lock cylinder with parts broken away; and
Fig. 2 is a perspective view of a lock cylinder with tumbler mounted therein.
The cylinder is formed by a body portion I provided with an internal opening 2 co-axial with the longitudinal axis of the body and having a cross-section approximately in the form of a rectangle. Grooves 3 are machined in the outer wall of the body in a number equal to the number of movable members with which the lock is to be provided. The depth of these members is such that they communicate directly with the internal. opening of the body through the two small sides of the rectangular section of this opening? and in such a mannerthat' the open ingsfll" thu'sfo'rmed have the same length a as 5 thesaidTectangularsection of the internal open- From the foregoing and by examination of the accompanying drawing, it will be seen that it is directly possible to mount the movable members of the lock in the cylinder, each of these members passing from opposite sides of the cylinder through the openings 4 and are guided on the one hand by the lateral Walls of the internal opening and on the other hand by the Walls of the grooves 3 which have been formed.
In the form of construction shown in the accompanying drawing, the two small sides of the internal opening 2 are formed by a sector of a cylinder co-axial with the body, in such a mango ner as to allow machining of the grooves 3 by shaping without risk of deterioration of the tool at the moment at which it enters the internal opening of the body.
It will be clear that the method of manufacture described above permits exact and very rapid for securing together the stacked parts are necessary. Further, the rigidity of the cylinder is entirely satisfactory and its precision much greater.
This thus results in considerable economy in time, whilst avoiding the variations in length of the cylinder due to differences in the thickness of the stacked elements.
I claim: a: 1. A cylinder for a security lock provided with a series of tumblers movable perpendicularly to the axis of the cylinder, in'which the said cylinder is formed by a body portion having an internal axially extending key opening oblong in cross-section and having narrow and wide walls,
46 a plurality of axially spaced and circumferential grooves equal to the number of tumblers with which the lock is provided, said circumferential grooves being of a width equal to the thickness of the tumblers and of a depth greater than 50 the difference between the external diameter of the cylinder and the transverse dimension of the wide walls of the key opening, but of a depth less than the difference between the external diameter of the cylinder and the transverse dimension of the narrow walls of the key opening so that the circumferential grooves communicate ing of oblong cross section having two narrow walls and two wide walls extending axially through the plug and symmetrically disposed relative to the axis of theplug, and forming a plurality of axially spaced tumbler chambers in said cylinder by machining a plurality of axially spaced, circumferentially extending grooves of rectangular cross section in the external surface of the cylinder of a width equal to the thickness of the tumbler chambers and of a depth greater than the thickness of the material of the cylinder between the narrow walls of the. keyway and the external surface of the cylinder, but of a depth less than the thickness of the material of the cylinder lying between the wide walls of the keyway and the external surface of the cylinder to provide diametrically disposed axially spaced tumbler guiding openings at the intersections of the bottoms of the grooves and the narrow walls of the keyway opening.
PAUL ALBERT KUNZ.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 183,035, Young Oct. 10, 1876 487,194 Mossberg Nov. 29, 1892 1,099,494 j. Eletcher June 9, 1914 1,736,685 Wilder Nov. 19, 1929 1 1,867,137 Carver July 12, 1932 1,953,535 J Hum Apr. 3, 1934 1,979,939 Jacobi Nov. 6, 1934 2,060,626 Lach Nov. 10, 1936 2,232,137 Rolph Feb. 18, 1941 2,342,340 Hickling Feb. 22, 1944 FOREIGN PATENTS Number Country Date 660,796 Germany June 2, 1938
US690261A 1945-09-03 1946-08-13 Tumbler lock plug Expired - Lifetime US2587739A (en)

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CH2587739X 1945-09-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775884A (en) * 1952-05-20 1957-01-01 Mefina Sa Cylinder device, particularly for a safety lock
US3128618A (en) * 1959-05-25 1964-04-14 Schlage Lock Co Key shut out for locks
US9021843B2 (en) * 2012-08-09 2015-05-05 Schlage Lock Company Llc Hybrid lock cylinder

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US183035A (en) * 1876-10-10 Improvement in locks for drawers
US487194A (en) * 1892-11-29 Frank mossberg
US1099494A (en) * 1913-09-19 1914-06-09 American Hardware Corp Manufacture of key-plugs for cylinder-locks.
US1736685A (en) * 1929-02-23 1929-11-19 Yale & Towne Mfg Co Lock
US1867137A (en) * 1928-07-31 1932-07-12 Fred S Carver Cage
US1953535A (en) * 1931-11-19 1934-04-03 Edwin P Hurd Method of making locks
US1979939A (en) * 1931-06-29 1934-11-06 Briggs & Stratton Corp Tumbler lock and method of fitting the same to a predetermined key change
US2060626A (en) * 1933-04-22 1936-11-10 Yale & Towne Mfg Co Lock and process of making the same
DE660796C (en) * 1936-09-27 1938-06-02 Carl Johan Lyno Cylinder lock with undivided plate-shaped, spring-controlled tumblers that can be slid across the cylinder axis
US2232137A (en) * 1937-07-01 1941-02-18 Yale & Towne Mfg Co Cylinder lock
US2342340A (en) * 1940-08-23 1944-02-22 Ransome And Marles Bearing Com Method of making roller-bearing cages

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US183035A (en) * 1876-10-10 Improvement in locks for drawers
US487194A (en) * 1892-11-29 Frank mossberg
US1099494A (en) * 1913-09-19 1914-06-09 American Hardware Corp Manufacture of key-plugs for cylinder-locks.
US1867137A (en) * 1928-07-31 1932-07-12 Fred S Carver Cage
US1736685A (en) * 1929-02-23 1929-11-19 Yale & Towne Mfg Co Lock
US1979939A (en) * 1931-06-29 1934-11-06 Briggs & Stratton Corp Tumbler lock and method of fitting the same to a predetermined key change
US1953535A (en) * 1931-11-19 1934-04-03 Edwin P Hurd Method of making locks
US2060626A (en) * 1933-04-22 1936-11-10 Yale & Towne Mfg Co Lock and process of making the same
DE660796C (en) * 1936-09-27 1938-06-02 Carl Johan Lyno Cylinder lock with undivided plate-shaped, spring-controlled tumblers that can be slid across the cylinder axis
US2232137A (en) * 1937-07-01 1941-02-18 Yale & Towne Mfg Co Cylinder lock
US2342340A (en) * 1940-08-23 1944-02-22 Ransome And Marles Bearing Com Method of making roller-bearing cages

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775884A (en) * 1952-05-20 1957-01-01 Mefina Sa Cylinder device, particularly for a safety lock
US3128618A (en) * 1959-05-25 1964-04-14 Schlage Lock Co Key shut out for locks
US9021843B2 (en) * 2012-08-09 2015-05-05 Schlage Lock Company Llc Hybrid lock cylinder
US9027373B2 (en) 2012-08-09 2015-05-12 Schlage Lock Company Llc Hybrid lock cylinder
US9725923B2 (en) 2012-08-09 2017-08-08 Schlage Lock Company Llc Hybrid lock cylinder
US10480215B2 (en) 2012-08-09 2019-11-19 Schlage Lock Company Llc Hybrid lock cylinder

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