US87645A - Improvement in portable key-hole guards - Google Patents
Improvement in portable key-hole guards Download PDFInfo
- Publication number
- US87645A US87645A US87645DA US87645A US 87645 A US87645 A US 87645A US 87645D A US87645D A US 87645DA US 87645 A US87645 A US 87645A
- Authority
- US
- United States
- Prior art keywords
- key
- jaws
- hole
- lock
- improvement
- 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
- 210000001847 Jaw Anatomy 0.000 description 32
- 238000003780 insertion Methods 0.000 description 6
- 210000002356 Skeleton Anatomy 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000000694 effects Effects 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
-
- 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
- Figures 3, 4, and 5, are different views of the lockguard.
- the object of this invention is to furnish a portable pocket safety-guard, which is adapted for being ⁇ in-V serted into key-holes of various sizes, and secured fast therein, and which, when it is thus applied, will effect ually prevent the insertion of a key or skeleton into the lock, thereby enabling a person, after locking a door from the inside, and removing the key, to secure the lock against any successful attempt to pick it.l
- my invention consists, in combination with a pair of flattened jaws, which are pivoted together, and provided with lever-extensions, anadjusting-screw, or its equivalent, which is adapted for forcibly expanding said jaws, and holding them in an expanded condition, so that when they are inserted into the key-hole of a lock, and expanded, they will prevent the insertion of a key into the lock, as will be hereinafter explained.
- My invention is applicable to any of the well-known or improvedlocks, A, having a key-hole made through i it, and through the door B, to which it is applied.
- I have represented acommon form of door-lock, having an improved guard confined in the key-hole thereof, so as to prevent the insertion into the lock, of a key or other instrument.
- My improved lock-guard consists of two jaws, b b,
- the jaws b b are made as thin as possible without having them too frail, so that they will enter key-holes as narrow as they are ever made; and these jaws are strengthened by making them quite wide, but not too wide, to enter key-holes as short as they are ever made for door-locks.
- the jaws are halved together, and ⁇ their .lever-extensions D D are tapered, so that when shut, as shown in iig. 4, they will iit closely together', and make a compact but strong instrument, which may be conveniently carried in the pocket.
- their outer griping-edges are made straight, or, if desirable, they may be curved outwardly, which latter form would afford a better hold, but would increase the width of the jaws at their free ends.
- the drawings represent a screw, E, applied to one of the arms or levers D, and tapped through it so as to bear upon the inner side of the opposite arm during the act of spreading the jaws; but in practice, a tongue or pawl may be pivoted to one arm, D, so as to catch into teeth made on the opposite arm D, and hold the jaws and arms more or less open, as may be required for key-holes of different length, and allow the jaws and arms to be shut, as shown in iig. 4.
- the portable key-hole guard consisting of arms D D, and jaws b b, pivoted together at a, and .screw E, or its equivalent, all substantially as herein described.
Landscapes
- Refrigerator Housings (AREA)
Description
uitrit 5mm- @gt-amt ltttm.
Leners-Patent Nq. 87,645, aaa/1 Mwah 9, 1869.
IMPRVEMENT IN PORTABLE KEY-HOLE GUARDS.
"The Schedule referred to in these Letters Patent and making part of the same.
Be it known that I,'WILL1AM E. DANTE, of Washington, in the county of Vashington, and District of Columbia, have inventedva Portable Lock-Guard; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of -this specification, in whichjaws b b, and arms or levers D D, at the same time.
Figures 3, 4, and 5, are different views of the lockguard. f
Similar letters of reference indicate corresponding parts in the several figures.
The object of this invention is to furnish a portable pocket safety-guard, which is adapted for being` in-V serted into key-holes of various sizes, and secured fast therein, and which, when it is thus applied, will effect ually prevent the insertion of a key or skeleton into the lock, thereby enabling a person, after locking a door from the inside, and removing the key, to secure the lock against any successful attempt to pick it.l
The nature of my invention consists, in combination with a pair of flattened jaws, which are pivoted together, and provided with lever-extensions, anadjusting-screw, or its equivalent, which is adapted for forcibly expanding said jaws, and holding them in an expanded condition, so that when they are inserted into the key-hole of a lock, and expanded, they will prevent the insertion of a key into the lock, as will be hereinafter explained.
-The following description will enable others skilled in the art to understand my invention.4
My invention is applicable to any of the well-known or improvedlocks, A, having a key-hole made through i it, and through the door B, to which it is applied.
In figs. 1 and 2, I have represented acommon form of door-lock, having an improved guard confined in the key-hole thereof, so as to prevent the insertion into the lock, of a key or other instrument.
It will be seen, by reference to iig. 2, that an instrument, somewhat like av pair of shears, is inserted into the key-hole of the lock A, and secured therein by spreading the jaws b b, so that the distance between the outer edges of their free ends is greater than the length of the key-hole. These jaws cannot be withdrawn or pushed out of the key-hole, until they are closed or partially closed, nor can the instrument be drawn through the lock from the outside of the door.
My improved lock-guard consists of two jaws, b b,
which are pivoted together at c, and constructed with lever-extensions D D, through one of which is tapped a thumb-screw, E, adapted .for distending both the The jaws b b are made as thin as possible without having them too frail, so that they will enter key-holes as narrow as they are ever made; and these jaws are strengthened by making them quite wide, but not too wide, to enter key-holes as short as they are ever made for door-locks.
The jaws are halved together, and` their .lever-extensions D D are tapered, so that when shut, as shown in iig. 4, they will iit closely together', and make a compact but strong instrument, which may be conveniently carried in the pocket.
For the purpose of causing the jaws b b to take a firm hold when extended in a key-hole, their outer griping-edges are made straight, or, if desirable, they may be curved outwardly, which latter form would afford a better hold, but would increase the width of the jaws at their free ends.
The drawings represent a screw, E, applied to one of the arms or levers D, and tapped through it so as to bear upon the inner side of the opposite arm during the act of spreading the jaws; but in practice, a tongue or pawl may be pivoted to one arm, D, so as to catch into teeth made on the opposite arm D, and hold the jaws and arms more or less open, as may be required for key-holes of different length, and allow the jaws and arms to be shut, as shown in iig. 4.
'Io use the instrument, after a door is locked from the inside and the key' is removed, the jaws b b are inserted into the key-l1ole,`and when properly adj usted therein, they are distended by turning the screw E,
until the outer edges of their free 'ends are a greaterdistance apart than the length of the key-hole, as shown in fig. 2, thus preventing the instrument from being forced back through the key-hole by a key or other device inserted from the outside of the door. And as the arms D D are spread apart in the act of spreading the jaws b b, it is obvious that the instrument cannot be drawn through a key-hole from the outside of the door.
Having described my invention,
What I claim as new, and desire to secure. by Letters Patent, is
The portable key-hole guard, consisting of arms D D, and jaws b b, pivoted together at a, and .screw E, or its equivalent, all substantially as herein described.
Witness my hand, in the matter of my application for Letters Patent for a portable lock-guard.
W. E. DANTE.
Publications (1)
Publication Number | Publication Date |
---|---|
US87645A true US87645A (en) | 1869-03-09 |
Family
ID=2157129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US87645D Expired - Lifetime US87645A (en) | Improvement in portable key-hole guards |
Country Status (1)
Country | Link |
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US (1) | US87645A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5390514A (en) * | 1993-05-11 | 1995-02-21 | Leonard Bloom | Locking devices for floppy disk drives |
US5394713A (en) * | 1993-05-11 | 1995-03-07 | Leonard Bloom | Locking devices for floppy disk drives |
US5719731A (en) * | 1996-02-14 | 1998-02-17 | Leonard Bloom | Locking device for preventing unauthorized access to floppy disk drives of personal computers |
US20050151836A1 (en) * | 2004-01-09 | 2005-07-14 | Ni Hong T. | Video conferencing system |
-
0
- US US87645D patent/US87645A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5390514A (en) * | 1993-05-11 | 1995-02-21 | Leonard Bloom | Locking devices for floppy disk drives |
US5394713A (en) * | 1993-05-11 | 1995-03-07 | Leonard Bloom | Locking devices for floppy disk drives |
US5719731A (en) * | 1996-02-14 | 1998-02-17 | Leonard Bloom | Locking device for preventing unauthorized access to floppy disk drives of personal computers |
US20050151836A1 (en) * | 2004-01-09 | 2005-07-14 | Ni Hong T. | Video conferencing system |
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