US3499301A - Lock with a separate bottom plate - Google Patents

Lock with a separate bottom plate Download PDF

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Publication number
US3499301A
US3499301A US3499301DA US3499301A US 3499301 A US3499301 A US 3499301A US 3499301D A US3499301D A US 3499301DA US 3499301 A US3499301 A US 3499301A
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US
United States
Prior art keywords
lock
plate
attachment
casing
lock casing
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
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English (en)
Inventor
Armas Kalervo Niilola
Into Vilho Sinervo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Oy AB
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Wartsila Oy AB
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 Wartsila Oy AB filed Critical Wartsila Oy AB
Application granted granted Critical
Publication of US3499301A publication Critical patent/US3499301A/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
    • E05B67/00—Padlocks; Details thereof
    • E05B67/06—Shackles; Arrangement of the shackle
    • E05B67/22—Padlocks with sliding shackles, with or without rotary or pivotal movement
    • E05B67/24—Padlocks with sliding shackles, with or without rotary or pivotal movement with built- in cylinder locks
    • 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
    • Y10T70/40—Portable
    • Y10T70/413—Padlocks
    • Y10T70/487—Parts, accessories, attachments and adjuncts
    • Y10T70/489—Housings

Definitions

  • the present invention relates to a lock consisting of a hollow casing with a bottom plate at one end.
  • lock casing there is an opening through which the lock mechanism is inserted.
  • This opening is normally more or less effectively protected by the way the lock is used.
  • the said opening is inside the door, and in padlocks it is directed against the shackle, so that it is protected by the shackle and by the attachment plates which carry the lock.
  • This type of lock casing can be made by casting or by machining from solidbars. This makes the manufacturing costs rather high. Cast lock casings cannot be hardened and so also have the considerable drawback that they can be destroyed rela tively easily by means of drilling or sawing.
  • the object of the present invention is to provide a reliable and simple attachment of a front-plate into the bottom part of the lock casing. By this means a simpler manufacture is obtained and it is at the same time possible to obtain increased security by making the frontplate of hard material.
  • the invention is characterized by the fact that the bottom of the lock casing comprises a separate front plate which, by means of plastic deformation of an attachment part in the bottom of the lock casing or by means of one or several attachment members, is attached to the lock casing.
  • This type of attachment gives a reliable joint because it is easy to apply high attachment forces during the manufacture of the lock, but it is diflicult to apply a separating force to the frontplate when the lock is in use. It should be noted that the attachment of the front-plate can easily be made such that the front-plate cannot be grabbed with any tool.
  • the invention also has the advantage that the manufacture of the lock casing is simpler when the front-plate is a separate part.
  • the main part of the lock casing can then be made of a profile-tube and, in that case, the necessary machining of the' casing is substantially reduced.
  • the attachment part which is subjected to plastic deformation, may be an annulus of soft material which is forced in between the front-plate and the surrounding part of the bottom lock casing.
  • the space between the two abovementioned parts is preferably given a conical shape.
  • the attachment pait may alternatively be a part of the lock casing or of the front-plate.
  • the attachment part is a part of the lock casing. This is necessary if the front-plate is made of hard material.
  • the attachment part is pressed into an attachment recess in the corresponding part of the lock.
  • the attachment recess is ice usually oblique, ie a conical groove or a groove with an enlarged bottom part.
  • the attachment part can then be fixed merely by pressing the lock casing against the attachment recess, so that the material of the former part flows into the recess.
  • a special attachment projection is made for instance in the form of an annular projection which during deformation is forced sideways into the attachment recess.
  • FIGURE 1 shows a section of the padlock according to the invention.
  • FIGURE 2 is a view of the padlock of FIGURE 1 as seen from the keyhole end.
  • FIGURE 3 shows the section III-III of FIGURE 2.
  • FIGURE 4 shows an attachment part in the form of an annulus.
  • FIGURES 5 to 7 show sections of three different ways in which the front-plate may be attached to the lock casing, by means of an annular attachment part being integral with the lock casing.
  • 1 indicates the main part of the lock casing, 2 the front-plate and 3 the keyhole in the middle of the front-plate.
  • the padlock shown in FIGURE 1 also comprises shackle 4 of hardened material and a cylinder lock 5 inserted in a boring 6.
  • the front-plate 2 has the formof a truncated cone and its greatest diameter is slightly smaller than the smallest diameter of the conicalrecess 7, so that the front-plate can be inserted into the recess.
  • the attachment ring 8 Before the assembly of the attachment ring 8, it can be cylindrical as shown in FIGURE 4. When the attachment ring is forced into its proper place, it becomes conical and fills the free space around the frontplate 2, thereby firmly securing the front-plate.
  • the padlock shown has also been provided with four pins 9 of hardened steel which, from the bottom side of the lock casing have been forced into corresponding borings in the lock 5 substantially parallel to the cylinder.
  • the pins 9 are long enough to reach past the end of the shorter leg of the shackle 4, when the shackle is in its locking position. At the same time, the pins 9 cover the main part of the cylinder lock 5. As shown in FIG- URES 2 and 3 the pins 9 are arranged very close to the front-plate 2 and provided with heads 9' which overlap the front-plate 2.
  • the front-plate 2 protects against breaking into the lock by means of drilling and the pins 9 protect against sawing across the lower part of the lock casing.
  • the shackle protects against sawing across the upper part of the lock casing.
  • the front-plate 2 can alternatively be attached to the lock casing merely by the pins 9 being an interference lit in their borings.
  • the pins may be provided with suitable protrusions which would cut into the surrounding material.
  • FIGURES 5 to 7 show another way of joining the frontplate and the lock casing. This way is especially intended for built-in cylinder locks, but it can also be used on padlocks and other types of lock.
  • the lock casing 1 is provided with an annular protrusion 15 which, during deformation sideways is forced into an attachment recess 14 in the front-plate.
  • the attachment recess 14 is conical, i.e. it runs obliquely outwards or inwards.
  • the protrusion 15, which is cylindrical at the beginning, is subject to deformation when it is forced into the attachment recess.
  • the front-plate is effectively fixed to the lock casing 1.
  • the attachment recess 14 is enlarged at its bottom end and this enlargement is filled more or less completely by the protrusion 15.
  • the method described to attach a front-plate can also be used to provide ready-made locks with a protective plate.
  • a suitable recess is made in the bottom of the lock. In this recess there should be a suitable attachment protrusion, preferably of annular shape. As described above a front-plate having a corresponding attachment recess can then be pressed onto the lock casing.
  • the invention is not limited to the embodiment shown.
  • a key operated lock comprising a hollow lock casing enclosing locking means of the cylinder lock type, said lock having a bottom portion including a key hole for said key, said bottom comprising a separate protecting disk of hard material of substantially the same diameter as said locking means and covering said locking means, said disk being attached to said lock casing by means of plastic deformationof an attachment part, said attachment part comprising an annular member of soft material, said member being forced between said protecting disk and a part of said lock casing surrounding said disk.
  • a key operated lock comprising a hollow lock casing enclosing locking means of the cylinder lock type, said lock having a bottom portion including a key hole for said key, said bottom comprising a separate protecting disk of hard material covering said locking means, said disk being attached to said lock casing by means of plastic deformation of an attachment part, said attachment part being integral with said lock casing and having a force fit in an attachment recess extending into said protecting disk from an opening on the surface of said disk facing said locking means, the attachment part undergoing plastic deformation while being so forced.
US3499301D 1966-08-11 1967-08-10 Lock with a separate bottom plate Expired - Lifetime US3499301A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI210166 1966-08-11
FI177667 1967-06-26

Publications (1)

Publication Number Publication Date
US3499301A true US3499301A (en) 1970-03-10

Family

ID=26156518

Family Applications (1)

Application Number Title Priority Date Filing Date
US3499301D Expired - Lifetime US3499301A (en) 1966-08-11 1967-08-10 Lock with a separate bottom plate

Country Status (3)

Country Link
US (1) US3499301A (de)
DE (1) DE1678062A1 (de)
GB (1) GB1198523A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385076B (de) * 1983-06-28 1988-02-10 Evva Werke Schluessel, sowie zylinderschloss mit zylindergehaeuse und einem zylinderkern
AU598395B2 (en) * 1987-09-10 1990-06-21 Teena Jane Rowlands A padlock having a removable cylinder and plug
US5170650A (en) * 1989-08-29 1992-12-15 Aug. Winkhaus Gmbh & Co. Kg Locking device for a lock, especially for a ring lock
US5394711A (en) * 1993-02-09 1995-03-07 Abloy Security Ltd Oy Padlock with removable cover
US5755121A (en) * 1996-07-23 1998-05-26 Master Lock Company Lock body having opposing identical molded plastic sections
US20090183540A1 (en) * 2008-01-18 2009-07-23 Chien-Chih Lu Pickup-truck tailboard lock

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US212892A (en) * 1879-03-04 Improvement in padlocks
US327715A (en) * 1885-10-06 avest
US465897A (en) * 1891-12-29 Vania
US1348234A (en) * 1920-03-11 1920-08-03 John M Fitzgerald Lock
US2281088A (en) * 1940-06-28 1942-04-28 Eagle Lock Company Rap-proof padlock
GB632768A (en) * 1947-10-21 1949-12-05 Ingersoll Ltd Improvements in locks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US212892A (en) * 1879-03-04 Improvement in padlocks
US327715A (en) * 1885-10-06 avest
US465897A (en) * 1891-12-29 Vania
US1348234A (en) * 1920-03-11 1920-08-03 John M Fitzgerald Lock
US2281088A (en) * 1940-06-28 1942-04-28 Eagle Lock Company Rap-proof padlock
GB632768A (en) * 1947-10-21 1949-12-05 Ingersoll Ltd Improvements in locks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385076B (de) * 1983-06-28 1988-02-10 Evva Werke Schluessel, sowie zylinderschloss mit zylindergehaeuse und einem zylinderkern
AU598395B2 (en) * 1987-09-10 1990-06-21 Teena Jane Rowlands A padlock having a removable cylinder and plug
US5170650A (en) * 1989-08-29 1992-12-15 Aug. Winkhaus Gmbh & Co. Kg Locking device for a lock, especially for a ring lock
US5394711A (en) * 1993-02-09 1995-03-07 Abloy Security Ltd Oy Padlock with removable cover
US5755121A (en) * 1996-07-23 1998-05-26 Master Lock Company Lock body having opposing identical molded plastic sections
US20090183540A1 (en) * 2008-01-18 2009-07-23 Chien-Chih Lu Pickup-truck tailboard lock

Also Published As

Publication number Publication date
GB1198523A (en) 1970-07-15
DE1678062A1 (de) 1971-08-12

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