US103288A - Improvement in key-hole guards - Google Patents
Improvement in key-hole guards Download PDFInfo
- Publication number
- US103288A US103288A US103288DA US103288A US 103288 A US103288 A US 103288A US 103288D A US103288D A US 103288DA US 103288 A US103288 A US 103288A
- Authority
- US
- United States
- Prior art keywords
- key
- hole
- guard
- improvement
- hole guards
- 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
Links
- 230000000875 corresponding Effects 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/14—Closures or guards for keyholes
- E05B17/16—Closures or guards for keyholes shaped as pins or key bits
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- 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
- Y10T70/7915—Tampering prevention or attack defeating
- Y10T70/7955—Keyhole guards
- Y10T70/796—Portable
Definitions
- ⁇ B is a section, smaller than the part A, but similar inshape, attached to one ⁇ endof the latter by the adjusting-screw C, to which it is firmly secured.
- the part B may "be made separately, and eut from the part A after the ⁇ latter is formed.
- the guard is applied to a key-hole as shown in Fig. 3, in i which D E are sectionsof a door and lock, re-
- the screw C may be operated to move the part B to a greater or less distance from the part A, thereby increasing or decreasing the length of the guard.
- the key-hole guard consisting of the block A, provided with a female screw-thread, and the headed screw G, having the block B firmly secured thereto, for the purpose speciiied.
Landscapes
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Description
NITED STATES PATENT Trice.
`Janine r. BODTKER, or CHICAGO, ILLINOIs.
"figlivlPRoveMENT |N KEY- HOLE cuARDs.
` Specification forming part of Letters Patent No. 103.28@ dated May 2 1870.
JZ'O a/Zl whom it 111,603/ concern,.- i i Be it known that I, JAMES, F. Boorman, of Chicago, in the county of Cook and State of `Illinois,have invented a new and useful Key- Hole Guard 5 f and I do hereby declare the `fol-Y lowing to be a full, clear, and exact, descrip'- tionthereof, which will enable others skilled in the art to which myinvention appertains to make and use the same, reference being had s to the accompanyingvdrawings, forming part e ofthis specification, iu which- T Figure 1 is a `perspective view of my imi proved key-hole"guard. Fig. 2 is an end view of thesame; and Fig. Bis a side view, showing its application to a key-hole.
Similar letters of reference indicate corresponding parts `in theseveral figures of the e drawings.
My invention hasfor its object to provide a guard for the key-hole of door-locks. &c., for the purpose of preventing the introduction of `false keys or burglars tools to unlock the door. 1`
In the accompanying drawings, A is a block` of metal or other suitable material, of the form shown in Fig. l-thatis to say, it is, in shape,
Vtransversely of` the `key-hole to which it is to be applied. `B is a section, smaller than the part A, but similar inshape, attached to one `endof the latter by the adjusting-screw C, to which it is firmly secured. The part B may "be made separately, and eut from the part A after the `latter is formed. The guard is applied to a key-hole as shown in Fig. 3, in i which D E are sectionsof a door and lock, re-
. spectively. The door is irst locked upon the inside, and the keyremoved. The guard is then inserted in the key-hole F to the extent shown in Fig. 3, and the part B turned up by the adjusting-screw C, to bear against the inner side of the look-case, as shown at G. It is not necessary that it should be turned to this precise position, as it may be turned to almost any angle with the part A, as shown in Fig. 2, provided it bears against the lock-case or an interior shoulder formed around the key-hole. When placed in position, as above described, it lls the key-hole to such an eX- tent that a key, H, or other instrument cannot be introduced to turn the lock. Neither can the guard be pushed out, as it is locked secure] y against such a result by the part B.
In order to accommodate doors of different thicknesses, the screw C may be operated to move the part B to a greater or less distance from the part A, thereby increasing or decreasing the length of the guard.
As a modification of my invention, where the guard is to be applied to a key-hole from the outside of a door, the part B is dispensed with and a notch made in or near the lower edge of the part A, to receive a spring attached to the bolt or some convenient inner portion of the lock.
Having thus described my invention, what I claim, and desire to secure by Letters Batent, 1s-
The key-hole guard consisting of the block A, provided with a female screw-thread, and the headed screw G, having the block B firmly secured thereto, for the purpose speciiied.
JAMES F. BODTKER.,
Titnessesz WM. C. FARWELL, G. H. FROST.
Publications (1)
Publication Number | Publication Date |
---|---|
US103288A true US103288A (en) | 1870-05-24 |
Family
ID=2172774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US103288D Expired - Lifetime US103288A (en) | Improvement in key-hole guards |
Country Status (1)
Country | Link |
---|---|
US (1) | US103288A (en) |
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0
- US US103288D patent/US103288A/en not_active Expired - Lifetime
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