Buckles – buttons – clasps – etc. – Readily interlocking – two-part fastener requiring either...
Patent
1990-10-24
1991-10-08
Brittain, James R.
Buckles, buttons, clasps, etc.
Readily interlocking, two-part fastener requiring either...
70 571, A44B 900
Patent
active
050541722
ABSTRACT:
In a device for deterring theft of a protected article, including a pin and clutch respectively embodied in two components that are adapted to be locked together on opposite sides of a portion of the protected article to prevent unauthorized removal of the device from the article, the pin-containing component contains two fragile elongated glass vials that fracture when at least a predetermined pressure is applied thereto, with the vials containing a detrimental substance that would damage an article attached to the device if such substance were to be released from the vial; and the head of the pin includes a breaker element having a wedge-shaped surface of a fiber-loaded-reinforced thermoplastic, (which does not scratch glass), for applying more than the predetermined pressure against the vial in response to the pinhead being moved in response to application to the two components of at least a predetermined threshold separation force, to thereby completely fracture the vials by inducing a high bending stress without prematurely cracking the vials, and to thereby release the substance contained therein before the components are separated by prying or pulling the components apart. A pliable seal is disposed between the breaker element and the vials for preventing the detrimental substance that is released from the fractured vials from entering the head space and for expelling the released detrimental substance through the adjacent opening in response to pressure applied against the seal by the breaker element by the movement of the pinhead that results in the vials being fractured.
REFERENCES:
patent: 4483049 (1984-11-01), Gustavasson et al.
patent: 4590461 (1986-05-01), Cooper
patent: 4649397 (1987-03-01), Heaton et al.
patent: 4670950 (1987-06-01), Wisecup et al.
patent: 4944075 (1990-07-01), Hogan
Charlot, Jr. Lincoln H.
Hogan Dennis L.
Lynch John L.
Brittain James R.
Callan Edward W.
Security Tag Systems, Inc.
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