US1470937A - Keyhole guard - Google Patents

Keyhole guard Download PDF

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Publication number
US1470937A
US1470937A US517880A US51788021A US1470937A US 1470937 A US1470937 A US 1470937A US 517880 A US517880 A US 517880A US 51788021 A US51788021 A US 51788021A US 1470937 A US1470937 A US 1470937A
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US
United States
Prior art keywords
key
guard
lug
follower
key hole
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
US517880A
Inventor
Frank W Schou
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.)
VANE SCHOU
Original Assignee
VANE SCHOU
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 VANE SCHOU filed Critical VANE SCHOU
Priority to US517880A priority Critical patent/US1470937A/en
Application granted granted Critical
Publication of US1470937A publication Critical patent/US1470937A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00Accessories in connection with locks
    • E05B17/14Closures or guards for keyholes
    • E05B17/16Closures or guards for keyholes shaped as pins or key bits
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/70Operating mechanism
    • Y10T70/7441Key
    • Y10T70/7915Tampering prevention or attack defeating
    • Y10T70/7955Keyhole guards
    • Y10T70/796Portable
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/70Operating mechanism
    • Y10T70/7441Key
    • Y10T70/7915Tampering prevention or attack defeating
    • Y10T70/7955Keyhole guards
    • Y10T70/7977Key-controlled
    • Y10T70/7983Portable

Definitions

  • BY RK X ATTORNE ei ir eg Figure 3 is a Patented a. is, 243.
  • FRANK w SCI-IOU, or LINCOLN, NEBRASKA. Assieivoa rovknn sciio i, or Bones CITY, ansas.
  • Houses. are often entered by thieves and burglars by means 'of p'ass keys. tis well known that most of the mortise and other 5 lockson housezd'oors can be easily unlocked by using a button hook; hair pin, bent wire or other improvised substitute fora key. It rthe doorkeyis left in the'lock; it'can be easily pushed out, orby nieansof long nosed pliersit can be turiied'andn adeto unlock the'door.
  • Figure 1' shows a portion of a door with my device applied to the opposite side.
  • FIG. 2 shows a. section of the same door
  • Figure 4 is a detail of the part whiohlis slidably secured tot-herodr
  • Figure 5 is a transverse sectionlofan 3 other form of my invention.
  • Figure 6 shows in plan the same niodifica tioii, the collar being sectioned to'show the FOG. 7 a l A a I l.
  • Figure 7 illustrates the key hole guard and i Figure 8 sliows the v
  • the rod 10 is screw threaded throughouta portion oi its length. at 11 and isprovided with a key way 12.
  • A'lug 13 is secured to the end oi? tlierodwhich enters the key hole;
  • the lug projects radially outward from the rod, and isangularly disposed with referdetail viewiof the screw V v collar used with the f modification shown generally in Figures 5' 3 once togthe key way, the preferred aiiglebeii'ig 'aprightangle. .At its free end the, rod 3 tern'iinates in aiiysuitable handle such as a hook (ii-"knob, but-I prefer to use a ring as shown at '14:.
  • the key hole closure 15 shown in detail in Figure 7 is preferably formed from two pieces of inetal welded-or otherwise secured together. The outer piece is bent upon itsel't to form a collar 16 and ears 1?. The 1I1-' ternal diameter? ofthe collar is slightly,
  • the inner piece comprises a portion fitting betweenthe earsll; and the inner edge or,
  • thisport'ion is a key 18 which'is adapted to fit into the ke iway 12.
  • the lu 19 is integi'al withtheportion between thereara and is ofsueli a length'thatwhen it-is seated in V thekey hole, the lug l9 extendsv nto the path of rotation of the lug 13; I I, v
  • sleeVeJQ-J' having ears 27 and ot a size to; 16 and cars 17,, and of a suitable length is added 1 fit snugly but 'slidably over the collar to the equipment. Apertures' 28 in the ears 27 register with the apertures in the ears 17 when the device is in place on the door lock.
  • the key hole guard is seated in the key hole, the follower 20 is screwed tight, the sleeve 26 is shoved into position, and a pad lock 24 is secured through the apertures 25 and 28, thus making access to the follow- 20" virtually impossible.
  • a key-hole guard comprising a stem which is adapted to enter key-hole, a lug keyway of the stem to prevent rotation of the yoke on the stem, said yoke also being provided with a lug'integral therewith, said last named lug being adapted to, enter the key hole and to extend into the path of rotation of said first named lug, a screw thread v on said stem, a screw-threaded follower surrounding saidstem, a second yoke which is. adapted to surround said first named yoke and said follower, and apertures in both of said yokes, the arrangement beingsuch that when the keyhole guard is in place in the lock, the apertures in the two yokes will register for the reception of a padlock.

Description

F. .vv sci-iou KEYHOLE GUARD Filed Nov. 26, 1921 my; [3 H H 6.
FRAN/f W 50H0(/ INVENTOR.
BY RK X ATTORNE ei ir eg Figure 3 is a Patented a. is, 243.
use? FRANK w. SCI-IOU, or LINCOLN, NEBRASKA. Assieivoa rovknn sciio i, or Bones CITY, ansas.
KEYHOLE sunnnf Application filed November 26, 1921} Serial No. 5172880.
Houses. are often entered by thieves and burglars by means 'of p'ass keys. tis well known that most of the mortise and other 5 lockson housezd'oors can be easily unlocked by using a button hook; hair pin, bent wire or other improvised substitute fora key. It rthe doorkeyis left in the'lock; it'can be easily pushed out, orby nieansof long nosed pliersit can be turiied'andn adeto unlock the'door. These troubles occur most .fre-I ueiitl in a artiiientfhouse's hotels and rooming liouseshwhere illitlly ta guest has awakened in the morning to find thathis .100111 had been entered during the night,i v I its keyin the-:usualmaniier and the key is then removed from the key hole. The rod and that money, jewelry, or valuable papers -were missing. My invention gives elfective protection not only when the occupant is in the room but also when he is away.
In the drawings which form apart of this applicationr f V Figure 1' shows a portion of a door with my device applied to the opposite side.
Figure 2 shows a. section of the same door;
threaded rod. and its key way. i
Figure 4 is a detail of the part whiohlis slidably secured tot-herodr Figure 5 is a transverse sectionlofan 3 other form of my invention.
Figure 6 shows in plan the same niodifica tioii, the collar being sectioned to'show the FOG. 7 a l A a I l.
Figure 7 illustrates the key hole guard and i Figure 8 sliows the v The rod 10 is screw threaded throughouta portion oi its length. at 11 and isprovided with a key way 12. A'lug 13 is secured to the end oi? tlierodwhich enters the key hole; The lug projects radially outward from the rod, and isangularly disposed with referdetail viewiof the screw V v collar used with the f modification shown generally in Figures 5' 3 once togthe key way, the preferred aiiglebeii'ig 'aprightangle. .At its free end the, rod 3 tern'iinates in aiiysuitable handle such as a hook (ii-"knob, but-I prefer to use a ring as shown at '14:.
-The key hole closure 15 shown in detail in Figure 7 is preferably formed from two pieces of inetal welded-or otherwise secured together. The outer piece is bent upon itsel't to form a collar 16 and ears 1?. The 1I1-' ternal diameter? ofthe collar is slightly,
greater than the diameter of the rod 10. The inner piece comprises a portion fitting betweenthe earsll; and the inner edge or,
thisport'ion; is a key 18 which'is adapted to fit into the ke iway 12. The lu 19 is integi'al withtheportion between thereara and is ofsueli a length'thatwhen it-is seated in V thekey hole, the lug l9 extendsv nto the path of rotation of the lug 13; I I, v
llhus far thestructure is common toboth forms of my, nventiomand when it is de sired to, secure thelockon the insideof the room, this structure is all that is needed. In
this case the lockboltisthrown by means. of l 10 with its bolt'l? is then thrustjiiito the key hole and given a quarter ofaturn, which brings he l g 19 into alignment with the k y h l Thejkey hole guard 15 is-then proper. Tlie iiollower 20 is then screwed tight.
It will readilybe seen that access through theylock froin the'outside is utterly iinpos-- sible' The key hole guard 15 can not rotate I because of the anchorage of the lug 19 iii the key holebnor can it beshoved length wise againstthe follower 20. t The rod l O be. 1
ing keyed against rotation can not turn whilethe key hole guard is seated in the key hole and even in the almostimpossible event 1 thatthe key sliould yield iii the keywa-y, the lugs l3 and .19would limit therotation toa quarter turii which"would have no appreciable e ifeet lengthwise on the follower together cannot pass out of the key hole at the. saine time; The only poss'ible way to remove my device froiiithe lock is to first 120. In this case the lugs 13 and '19 would" be broughti'nto juxtaposition, andboth lugs .105
unscrew the follower 20, and since this is on the inside of the room, it is impossible to gain access to it through the door.
It frequently happens that the occupant when he leaves his room wishes to secure the look so that the ro'om'can not be entered during his absence. For this reason I have add ed to the fundamental structure other elements which make it impossible to tamper with the follower 20 when the device is ap plied to theoutside of the door. In the construction shown in Figures 2 and 4:, I per-' for-ate the earsl'. of thekey hole guard 15 and pass a pin 21. through the aperturethus formed, firmly, securing the pin in the aperture thus formed. To the two extremities of the pin 'I pivota yoke 22. The follower is provided with a looped element 23 integral therewith. When all of the parts are in place on the door lock the yoke 22 is swung over the loop 23 and a padlock, preferably of the Yale or pin tumbler type,
is secured to the loop. This of course necessitjat'esjin the case ofunauthorlzed entry into the room that the, padlock be first plcked ibei 'ore' access can he gained to the door lock.
v y In the construction shown in'l igures 5, 6,
4, and 8, I accomplish the same result by means of a' slight modification. I perforate the ears 17 M25, the aperture '25 extending through. the portion between the ears. A
sleeVeJQ-J' having ears 27 and ot a size to; 16 and cars 17,, and of a suitable length is added 1 fit snugly but 'slidably over the collar to the equipment. Apertures' 28 in the ears 27 register with the apertures in the ears 17 when the device is in place on the door lock. In use the key hole guard is seated in the key hole, the follower 20 is screwed tight, the sleeve 26 is shoved into position, and a pad lock 24 is secured through the apertures 25 and 28, thus making access to the follow- 20" virtually impossible.
Having thus described my invention and the method of using it what I claim as new and desireto secure by Letters Patent of the Un ted States 1s:-
A key-hole guard comprising a stem which is adapted to enter key-hole, a lug keyway of the stem to prevent rotation of the yoke on the stem, said yoke also being provided with a lug'integral therewith, said last named lug being adapted to, enter the key hole and to extend into the path of rotation of said first named lug, a screw thread v on said stem, a screw-threaded follower surrounding saidstem, a second yoke which is. adapted to surround said first named yoke and said follower, and apertures in both of said yokes, the arrangement beingsuch that when the keyhole guard is in place in the lock, the apertures in the two yokes will register for the reception of a padlock.
In testimony whereof I atlix my signature.
FRANK W. sonou
US517880A 1921-11-26 1921-11-26 Keyhole guard Expired - Lifetime US1470937A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006557A (en) * 1995-02-08 1999-12-28 Acco Brands, Inc. Computer physical security device
US6112562A (en) * 1993-01-19 2000-09-05 Acco Brands, Inc. Computer physical security device
US6112561A (en) * 1994-08-26 2000-09-05 Acco Brands, Inc. Security device for a portable computer
US6155088A (en) * 1992-01-24 2000-12-05 Acco Brands, Inc. Computer physical security device
US6227017B1 (en) * 1994-04-12 2001-05-08 Darrell A. Igelmund Computer slot security adaptor
US20020017119A1 (en) * 1992-01-24 2002-02-14 Acco Brands, Inc. Computer physical security device
US6662602B1 (en) 1996-11-08 2003-12-16 Acco Brands, Inc. Security device for a portable computer
US6735990B1 (en) 1992-01-24 2004-05-18 Acco Brands, Inc. Computer physical security device
US6755056B2 (en) * 1994-04-12 2004-06-29 Darrell A. Igelmund Computer slot security adaptor
US7100404B2 (en) 1993-10-15 2006-09-05 Acco Brands Usa Llc Computer physical security device
US7191623B2 (en) 2003-07-23 2007-03-20 Acco Brands Usa Llc Computer physical security device with retractable cable
US7204106B2 (en) 2001-08-13 2007-04-17 Acco Brands Usa Llc Portable electronic device physical security
US7234326B1 (en) * 2006-06-05 2007-06-26 Miz Engineering Ltd. Lock device
US7409842B2 (en) 2002-07-24 2008-08-12 Acco Brands Usa Llc Lock for securing an article on display
US7415852B1 (en) 2004-10-06 2008-08-26 Acco Brands Usa Llc Tubular lock with theft deterrent
US7500371B2 (en) 2005-11-18 2009-03-10 Acco Brands Usa Llc Locking device with passage
US7614266B2 (en) 2007-10-15 2009-11-10 Acco Brands Usa Llc Security apparatus with reset mechanism
US7997106B2 (en) 2009-05-29 2011-08-16 Acco Brands Usa Llc Security apparatus including locking head and attachment device
USD651889S1 (en) 2011-04-19 2012-01-10 Acco Brands Usa Llc Security apparatus
US8230707B2 (en) 2007-05-25 2012-07-31 ACCO Brands Corporation Security system with lock interface member with multiple apertures
US9932102B2 (en) * 2015-08-27 2018-04-03 The Boeing Company Lock assemblies for female drive receptacles

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7111479B2 (en) 1992-01-24 2006-09-26 Acco Brands Usa Llc Computer physical security device
US7143614B1 (en) 1992-01-24 2006-12-05 Acco Brands Usa Llc Computer physical security device
US6735990B1 (en) 1992-01-24 2004-05-18 Acco Brands, Inc. Computer physical security device
US20010013234A1 (en) * 1992-01-24 2001-08-16 William R. Murray Computer physical security device
US20020017119A1 (en) * 1992-01-24 2002-02-14 Acco Brands, Inc. Computer physical security device
US6553794B1 (en) 1992-01-24 2003-04-29 Acco Brands, Inc. Computer physical security device
US6588241B1 (en) * 1992-01-24 2003-07-08 Acco Brands, Inc. Computer physical security device
US7121125B2 (en) 1992-01-24 2006-10-17 Acco Brands Usa Llc Computer physical security device
US7100403B2 (en) 1992-01-24 2006-09-05 Acco Brands Usa Llc Computer physical security device
US6155088A (en) * 1992-01-24 2000-12-05 Acco Brands, Inc. Computer physical security device
US6112562A (en) * 1993-01-19 2000-09-05 Acco Brands, Inc. Computer physical security device
US7100404B2 (en) 1993-10-15 2006-09-05 Acco Brands Usa Llc Computer physical security device
US7201029B2 (en) 1993-10-15 2007-04-10 Acco Brands Usa Llc Computer physical security device
US6305199B1 (en) 1994-04-12 2001-10-23 Darrell A. Igelmund Computer slot security adaptor
US6227017B1 (en) * 1994-04-12 2001-05-08 Darrell A. Igelmund Computer slot security adaptor
US6755056B2 (en) * 1994-04-12 2004-06-29 Darrell A. Igelmund Computer slot security adaptor
US6112561A (en) * 1994-08-26 2000-09-05 Acco Brands, Inc. Security device for a portable computer
US6006557A (en) * 1995-02-08 1999-12-28 Acco Brands, Inc. Computer physical security device
US6662602B1 (en) 1996-11-08 2003-12-16 Acco Brands, Inc. Security device for a portable computer
US7204106B2 (en) 2001-08-13 2007-04-17 Acco Brands Usa Llc Portable electronic device physical security
US7409842B2 (en) 2002-07-24 2008-08-12 Acco Brands Usa Llc Lock for securing an article on display
US7191623B2 (en) 2003-07-23 2007-03-20 Acco Brands Usa Llc Computer physical security device with retractable cable
US7647796B2 (en) 2003-07-23 2010-01-19 Acco Brands Usa Llc Computer physical security device with retractable cable
US7415852B1 (en) 2004-10-06 2008-08-26 Acco Brands Usa Llc Tubular lock with theft deterrent
US7500371B2 (en) 2005-11-18 2009-03-10 Acco Brands Usa Llc Locking device with passage
US7730751B2 (en) 2005-11-18 2010-06-08 Acco Brands Usa Llc Locking device with passage
US7963132B2 (en) 2005-11-18 2011-06-21 Acco Brands Usa Llc Locking device with passage
US7234326B1 (en) * 2006-06-05 2007-06-26 Miz Engineering Ltd. Lock device
US8230707B2 (en) 2007-05-25 2012-07-31 ACCO Brands Corporation Security system with lock interface member with multiple apertures
US7614266B2 (en) 2007-10-15 2009-11-10 Acco Brands Usa Llc Security apparatus with reset mechanism
US8001812B2 (en) 2009-05-29 2011-08-23 Acco Brands Usa Llc Security apparatus including locking head
US8042366B2 (en) * 2009-05-29 2011-10-25 Acco Brands Usa Llc Security apparatus including attachment device
US7997106B2 (en) 2009-05-29 2011-08-16 Acco Brands Usa Llc Security apparatus including locking head and attachment device
USD651889S1 (en) 2011-04-19 2012-01-10 Acco Brands Usa Llc Security apparatus
USD660682S1 (en) 2011-04-19 2012-05-29 Acco Brands Usa Llc Security apparatus
USD661975S1 (en) 2011-04-19 2012-06-19 ACCO Brands Corporation Attachment device for security apparatus
USD670553S1 (en) 2011-04-19 2012-11-13 ACCO Brands Corporation Attachment device for security apparatus
US9932102B2 (en) * 2015-08-27 2018-04-03 The Boeing Company Lock assemblies for female drive receptacles

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