Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3858923 A
Publication typeGrant
Publication dateJan 7, 1975
Filing dateOct 18, 1973
Priority dateOct 18, 1973
Publication numberUS 3858923 A, US 3858923A, US-A-3858923, US3858923 A, US3858923A
InventorsBunn Frank C
Original AssigneeBunn Frank C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
High security hasp
US 3858923 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 11 1 Bunn [ HIGH SECURITY HASP [76] Inventor: Frank C. Bunn, 2004 Priceton Blvd., S.W., Huntsville, Ala. 35801 [22] Filed: Oct. 18, 1973 21 Appl. No; 407,765

52 us. Cl. 292/281, 70/52, 70/416 51 1m. (:1. E05c 19/08 581 Field Of Search 292/281-286,

[56] References Cited UNITED STATES PATENTS 3,652,114 3/1972 Cady et al 70/52 3,744,280 7/1972 Brown, Jr. et al. 70/54 Jan. 7, 1975 3,759,557 9/l973 Athas 292/281 Primary Examiner-Richard E. Moore Attorney, Agent, or Firm-Edward J. Kelly; Herbert Berl; Charles R. Carter [57] ABSTRACT A hasp for providing protection on high security buildings against cutting by use of bolt cutters, saws, and files, hammering, and breaking by torquing levers. The hasp parts are constructed of a metal with'a hardness of Rockwell C-65 or greater to a depth of 0.025 to' 0.032 inch. The upper protective plates of the hasp parts mate in a tongue and groove engagement to prevent the insertion of a hacksaw therebetween.

3 Claims, 4 Drawing Figures BACKGROUND OF THE INVENTION This invention relates to the field security hasps. A problem with the security hasps currently in use is that they are susceptible to the use of a hacksaw to saw the padlock and thus break the security required. I

SUMMARY OF THE INVENTION following detailed description takenin conjunction with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a viewshowing a padlock connected with the hasp parts.

FIG. 2 is a perspective view of the hasp parts and a padlock.

FIG. 3 shows a detailed view of the overlap.

FIG. 4 is a view of a padlock connected with a modified hasp.

DESCRIPTION OF THE PREFERRED EMBODIMENT The high security hasp is shown consisting of two locking parts and 12. Each locking part includes a ened after construction to a hardness of Rockwell C-65 to a depth of 0.025 to 0.032 inches. This degree-of hardness prevents the effective use of a hacksaw blade on thehasp. r

The padlock '30 is provided with a recess 32 that is contoured to matewith the outer edge surfaces 34 of locking bars 18. Shackle 22 passes through openings 20 and the padlock is moved up the shackle into cavity 36 to a position where surfaces 34 fit inside of recess 32. The close mating of surfaces 34 within the recess 32 allowsthe upper curved surface of shackle 22 to be completely enclosed by padlock as shown in FIG. 1. This complete enclosure of the shackle makes any tamper ing extremely difficult.

In the modification shown in FIG. 4, the plates 24 are provided with a flange 38 which extends downwardly from the outer edge of the plates. These flanges obstruct access-to the locking bars 18.

I claim: y 1 A securing device comprising a hasp with a pair of locking bars having openings v therein and a padlock with a shackle for secured position engagement with said openings; said hasp and said padlock being-disposed to completely cover said shackle and said padlock being disposed-to cover said bars in the secured position, said hasp including: a pair of mounting plates mounting plate 14 provided with openings 16 for mounting the parts on a surface to prevent forced entry. The locking parts have a padlock locking bar 18 disposed in perpendicular relation to' the mounting plate 14. Bars 18 are provided with openings 20 to allow passage of the padlock shackle 22. Plates l4 and bars 18 are connected at one of their ends to upper horizontal protective plates 24. The edges of plates 24 which overlie the locking bar mate in an overlapping engagement as shown by a lip 26 and a recess 28. This overlap feature prevents insertion of a hacksaw blade for use on the shackle. All of the hasp parts are hardfor mounting the hasp; a pair of locking bars disposed in side by side relationship to each other and connected in perpendicular relation to said mounting plates; and a pair of horizontal protective plates connected to ends of said mounting plates and said locking bars, each of said protective plates having an edge provided with a lip and a recess whereby when said protective plates are brought together the lip of one edge engages the recess of the opposite edge in an overlapping manner.

2. A hasp as set forth in claim 1 wherein said mounting plates, said locking bars and said protective plates are hardened to a hardness of Rockwell C-65 to a depth of 0.025 to 0.032 inches.

3. A hasp as set forth in claim 2 wherein said mountwardly from the outer edge of said plates. =l= I

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3652114 *Nov 13, 1969Mar 28, 1972Best Look CorpSecurity hasp
US3744280 *Jul 28, 1972Jul 10, 1973Us NavyHigh security locking mechanism
US3759557 *May 25, 1971Sep 18, 1973Us ArmyLocking bars for high security padlocks
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3916654 *Jan 8, 1975Nov 4, 1975Mudge Jr Karl EPadlock protector
US3996774 *Feb 24, 1975Dec 14, 1976Best Walter EHigh security locking mechanism
US4102162 *Oct 3, 1977Jul 25, 1978Sargent & Greenleaf, Inc.Padlock having guided wedges for resisting destructive wedge attack
US4104894 *Oct 3, 1977Aug 8, 1978Sargent & Greenleaf, Inc.Padlock having wedge device for resisting destructive wedge attack
US4566296 *Aug 6, 1984Jan 28, 1986Kochakis Donald GPadlock security cover
US4689975 *Aug 5, 1986Sep 1, 1987Ogden Industries Pty. Ltd.Padlock
US4745783 *Jun 29, 1987May 24, 1988Poe Lloyd RTamper proof padlock hasp apparatus
US4879889 *Sep 28, 1987Nov 14, 1989Deforrest William SrShackle protector
US4953371 *Dec 11, 1989Sep 4, 1990Paul AppelbaumShackleless padlock
US5655391 *Feb 23, 1995Aug 12, 1997R.P.L. Industries Pty. Ltd.Padlocks
US5743116 *Jun 3, 1997Apr 28, 1998Suster; Thomas MitchelMulti-lock hasp
US5806352 *Jul 19, 1995Sep 15, 1998Axford; NormanLocking bracket
US20130047402 *Oct 15, 2012Feb 28, 2013Robert Joseph Kaminsky, JR.Method for maintaining a door in a closed position on an over-the-road vehicle
CN1330843C *Jun 19, 2003Aug 8, 2007陈旺松Lock device with movable protective cover
DE3243445A1 *Nov 24, 1982Jul 7, 1983Abraham BahrySchutzschliessband fuer ein vorhaengeschloss
WO1991010799A1 *Jan 18, 1990Jul 25, 1991Paul AppelbaumShackleless padlock
Classifications
U.S. Classification292/281, 70/52, 70/416
International ClassificationE05B67/38, E05B67/00
Cooperative ClassificationE05B67/383
European ClassificationE05B67/38B