Abstract: A screw member having a plurality of heads by providing one or more thin neck portions to be sheared at a predetermined torque, in which a collar having a skirt portion with its one part being cut away is fitted on the thin neck portion from the lateral side to expose the outer head part alone and to engage the cap member fitted from the side of the bearing surface of the inner head part of the screw member, and the cap member is inserted between the skirt of the collar and the inner head part to thereby prevent the collar from slipping out.

Abstract: A screw member having a plurality of heads by providing one or more thin neck portions between them to be sheared at a predetermined torque, wherein a cap member surrounding the outer periphery of an inner head part from the side of its bearing surface is engaged with the inner head part so as not to displace outwardly slipping out of it, and the inner peripheral surface of the cap member is made conformable to a shape of the outer peripheral surface of a socket of a screw driving tool to be fitted on the inner head part.

Abstract: Apparatus for sealing a postage meter is disclosed. The sealing apparatus includes a cover with a cut-out portion. The cover portion includes two cover tab receiving openings which are positioned diametrically across from each other. The center of the cut-out portion has a bore hole that runs completely through the thickness of the cover. An insert is provided which is adapted to fit into and mate with the bore hole. The insert contains an opening which will accept a screw and also contains upwardly extending tabs. A screw is used to fasten the sealing apparatus to the postage meter. When the tabs are stacked over the screw, it is impossible to remove the screw without first breaking off the tabs. A broken tab will thus indicate that the meter has been tampered with.

Abstract: This invention relates to a screw type fastener having a radially enlarged driving head and a thin walled head conforming cap having a skirt which is designed to be folded inwardly beneath the head in a lapped condition beneath the head to conceal the exposed edge of the skirt between an exposed clamping surface of the cap and the under surface of the head of the fastener.

Abstract: A coupling arrangement includes a fastener driver head and a mating tool drive socket. The fastener driver head comprises a substantially circular disc-shaped base portion, a plurality of frustoconical portions integrally formed with the base portion and concentrically located within one surface thereof. A plurality of ribs are integrally formed with the base portion and alternating with the frustoconical portions and extend axially outwardly of both the base portion and the frustoconical portions. Each of the ribs extends from a line parallel with and spaced above a given diameter of the base portion to an outer periphery of said base portion. A mating drive tool has a recessed driving head or socket substantially complementary with the fastener head for closely interfitting engagement therewith.

Abstract: A tamper indicator includes a collar which can be positioned to be circumambient a connection nut on a gas meter. The collar includes two portions which are interlocked by snap-catches which are located inside a locked collar. The collar portions are formed of frangible material and can include lines of weakening. Once in place, the collar cannot be removed without breaking it, and once broken cannot be repaired so that an indication is provided that the encircled connection nut may have been tampered with.

Abstract: An anti-tamper fastening screw has an actuating head which can be accessed only by a special tool and can thus be used effectively in a locking system provided for use with removable automobile roof latching mechanisms. The threaded screw has a specially keyed and tooled head adjusted to be inserted through two holes and held in position by mating threads to retain a roof component in locked position. A special tool is provided which is operatively engageable with the keyed head of the fastening screw to prevent unauthorized removal of the detachable roof without utilizing the special tool.

Abstract: A terminal comprises a slotted bolt (7), and a cap (10) therefor. The cap has one end closed by a plate (14) with two lugs (11,12) projecting perpendicularly from the periphery of the plate (14) and a central boss (13) with two plane faces (18) opposite the gaps between the lugs. The plane faces have hooks (58) reaching part of the way up them, and the end of the boss beyond the hooks is polygonal. The tool includes a torque limiter (25), a casing (28), and a drive member (29) passing through the casing and made fast to the torque limiter. The casing has two lugs (44,45) and a lock (30) with hooks (39,39') that engage the hooks on the cap. The lugs on the casing fit in between the lugs on the cap, and the drive member has a sleeve (31) at its cap-engaging end with a socket (32) shaped to receive the central boss (13).

Abstract: A tamper indicator includes a collar which can be positioned to be circumambient a connection nut on a gas meter. The collar includes two portions which are interlocked by snap-catches which are located inside a locked collar. The collar portions are formed of frangible material and can include lines of weakening. Once in place, the collar cannot be removed without breaking it, and once broken cannot be repaired so that an indication is provided that the encircled connection nut may have been tampered with.

Abstract: Disclosed is a security device and method. The device includes a bolt having a first hole drilled radially therein, a second threaded hole drilled axially therein to intersect the first hole, and a third hole formed axially therein connecting the second hole with the end of the bolt. A bar is insertable into the first hole to extend radially outside the bolt thereby to prevent a nut from being removed from the bolt. The bar is secured in the bolt by means of a pick-proof lock that has a screw portion threadably engagable with the second hole to engage the bar, and a lock body configured to fit the third hole.

Abstract: A device for effecting a generally tamper resistant threaded connection. The device includes a threaded fastener and a tool for driving and setting the fastener. The fastener has an internally threaded body portion, and a hollow cylindrical axially extending tool engaging portion spaced radially outward from the body portion and interconnected therewith. The tool engaging portion has a generally serrated driving surface defined by a plurality of circumferentially spaced recesses for receiving a like number of complementary shaped projections on the tool. The recesses and the projections cooperate to establish a driving connection between the fastener and the tool when the tool is turned in a direction for driving and setting the fastener. When the tool is turned in a direction for backing-off the fastener once it has been set, the recesses and the projections cooperate to slidingly eject the projections from the recesses to break the driving connection between the tool and the fastener.

Abstract: A seal for a pipe coupling such as is used to connect a gas meter to a gas supply line. The seal is made in two portions, which may be connected by a flexible web, and the portions have integral means for locking together around the nut of a coupling. Each portion has an outer shell with internal protrusions formed on the inner surface thereof. The portions are made of pigmented plastic of a type, such as polypropylene, that forms a white blush on the surface when permanently deformed. Hence when an attempt is made to remove the seal by a wrench or the like, the internal protrusions are forced against the nut, forming white blushes on the outer surface opposite the position of the ribs, giving visual evidence of tampering.

Abstract: A lug nut attachment is provided for detecting the removal of a wheel lug nut, a device that serves as a tire security cap. The cap comprises a breakable shroud and means for mounting the cap to one lug nut of a wheel. When mounted thereto the cap encloses the lug nut and prevents access thereto until the shroud is broken.

Abstract: The invention relates to fastening means of the known kind comprising a nut or bolthead and a spanner component, the nut or bolthead having a smooth edge surface and the spanner component having locating pins adapted to engage in cooperating bores in the nut or bolthead to rotate the nut or bolthead with the spanner component. Said fastening means are improved by providing (a) a sleeve which rotatably covers at least part of said edge surface and/or (b) an axial projection, preferably on the nut or bolthead, which is received as a rotatable fit in a recess, preferably in the spanner component, to restrict lateral movement between the nut or bolthead and the spanner component.

Abstract: An anti-vandalism nut assembly joins two or more structures and includes a threaded bolt and a specially designed nut which is assembled through the use of another threaded element. Two nuts are each formed with a rectangular or square base and four sloping sides providing a pyramid-like construction extending upwardly from the base. The inner securing nut cannot be rotated by conventional tools when seated tightly in place because of the sloping construction. In assembly or dis-assembly, the outer nut is threaded on the bolt and spaced from the inner nut so that a conventional tool may be wedged between the two nuts for gripping both nuts securely for selective rotation.

Abstract: A theft deterrent device for "bolting" pieces of material together, comprising:(1) a nut-like device having a smooth outer surface resistant to the effects of conventional wrenches,(2) a male threaded member having an internally threaded axial bore, adapted to threadedly engage the nut-like member,(3) a locking screw for threadedly engaging the internal bore of the male member, and having a head that mates with the smooth outer surface of the nut-like device, resulting in an essentially smooth, continuous outer surface resistant to removal using conventional wrenches, and(4) an environmental plug for inserting into the driving recess or bore of the screw to prevent foreign and corrosive matter from entering the recess. The locking screw threads are of opposite hand to that of the nut-like portion, so that the locking screw must first be removed before the nut may be removed.