US 3858923 A
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United States Patent 11 1 Bunn [ HIGH SECURITY HASP  Inventor: Frank C. Bunn, 2004 Priceton Blvd., S.W., Huntsville, Ala. 35801  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,
 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  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