Security hinge
First Claim
1. A security hinge comprising a pair of leaves, one of said leaves including at least a pair of spaced end knuckles and the other of said leaves including at least one intermediate knuckle positioned between said end knuckles, said knuckles each including a central axial bore, said bores being aligned co-axially, a pin member disposed inside said bore of at least one of said end knuckles for rotation in unison therewith, and extending into said bore of said intermediate knuckle, stop means for preventing said pin member from being driven completely through said end knuckle bore, and means disposed in the bore of the other of said end knuckles to prevent said pin from being forced out of said one end knuckle, wherein said means includes a second pin member, such that one pin is associated with each of said end knuckles and each pin comprising a generally cylindrical body portion extending into said intermediate knuckle bore and an end portion of enlarged diameter disposed inside said bore of said end knuckle and engaged against said stop means to prevent further axially inward movement.
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Accused Products
Abstract
A security hinge is disclosed which includes a pair of leaves, having respectively, at least a pair of spaced end knuckles and at least one immediate knuckle disposed therebetween. Each knuckle includes a central axial bore, the bores being aligned co-axially. A pair of pins are provided, each pin having a head portion disposed in an end knuckle bore for rotation in unison therewith and a body portion thereof disposed within an intermediate knuckle bore to maintain the leaves in assembly and permit relative rotation therebetween the pin and intermediate knuckle. Stop means, are provided interiorly of the bores, against which the heads of the respective pins abut, thus preventing the pins from being driven completely through the end knuckle bores in the axially inward direction. Since the pins are recessed within the bores, and one prevents the other from being forced out of the bores in the axially outward direction, unauthorized disassembly of the hinge is precluded. The hinge may be provided with continuous passage means into which one or more electrical conductors are engaged, so that said conductor is substantially concealed, the hinge giving the outward appearance of a conventional, load bearing hinge.
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Citations
21 Claims
- 1. A security hinge comprising a pair of leaves, one of said leaves including at least a pair of spaced end knuckles and the other of said leaves including at least one intermediate knuckle positioned between said end knuckles, said knuckles each including a central axial bore, said bores being aligned co-axially, a pin member disposed inside said bore of at least one of said end knuckles for rotation in unison therewith, and extending into said bore of said intermediate knuckle, stop means for preventing said pin member from being driven completely through said end knuckle bore, and means disposed in the bore of the other of said end knuckles to prevent said pin from being forced out of said one end knuckle, wherein said means includes a second pin member, such that one pin is associated with each of said end knuckles and each pin comprising a generally cylindrical body portion extending into said intermediate knuckle bore and an end portion of enlarged diameter disposed inside said bore of said end knuckle and engaged against said stop means to prevent further axially inward movement.
- 5. A security hinge for mounting a door to a door frame and for providing an electrically conductive path between said door and said door frame, said hinge comprising a pair of leaves, one of said leaves including at least a pair of spaced end knuckles and the other of said leaves including at least one intermediate knuckle means disposed between said end knuckles, said knuckles each including a central axial bore, said bores being aligned co-axially, a pin member disposed within each said end knuckle bore for rotation in unison therewith and extending at least into the bore of the knuckle means of the other leaf, stop means for preventing said pin means from being driven completely through said end knuckle bores, said pin member being recessed with respect to said end knuckles so that neither member may be driven out of said bores from the opposite direction, and concealed and tamper-proof conductor means for providing said electrically conductive path between said door and said door frame and passage means formed in said hinge for the passage of said conductor means therethrough.
- 9. A security hinge comprising a pair of leaves, one of said leaves including at least a pair of spaced apart end knuckles, the other of said leaves including at least one intermediate knuckle disposed between said end knuckles, and said knuckles each including a central axial bore, said bores being aligned co-axially, pin means disposed inside of said end knuckle bores and recessed with respect to the end surfaces thereof for rotation in unison therewith and extending into said intermediate knuckle, stop means for preventing said pin from being driven completely through said end knuckle bores, said pin means including a pair of pins each comprising a generally cylindrical body portion extending into said intermediate knuckle and a disc-like end portion of larger diameter than said body portion disposed inside of said end knuckle bore, and engaged with said stop means.
- 13. A security hinge comprising a pair of leaves, at least one knuckle formed on each said leaf, each knuckle including a central axial through bore with said knuckles being juxtaposed with their respective bores co-axially aligned, pin means disposed within said knuckles to maintain said knuckles in assembly, including a first pin member inserted through a first one of said knuckles in a first axial direction, and a second pin member inserted through the second knuckle in a second axial direction, stop means associated with said pin members for positively precluding said pin members from being driven completely through said knuckle bores in the direction of their respective insertions, and both said pin members being disposed entirely within said knuckles, thereby providing a tamper-proof hinge construction.
- 20. A load bearing hinge for mounting a door in a door frame and for providing an electrically conductive path between said door and said door frame comprising a pair of leaves, one of said leaves including a pair of spaced apart end knuckles and the other of said leaves including at least one intermediate knuckle disposed between said end knuckles, said knuckles each including a central axial bore, said bores being aligned co-axially with pin means disposed inside of said bores to maintain assembly, first passage means formed in said one leaf opening to the bore of one of said end knuckles, second passage means formed in the other of said leaves and opening to said at least one intermediate knuckle, an end cap disposed in the bore of said one end knuckle and including recess means aligned with said first passage, said pin means including a central bore and extending along said central axial bore to a location proximate said juncture of said second passage with said central bore, and continuous conductor means passing through said first passage into said end cap recess means, and from there along said pin means bore to said second passage means wherein said conductor is concealed from view and housed in a tamper-proof manner.
Specification