1
Lincoln H Charlot Jr: Ball clutch mechanism with two sets of balls in separate radial planes. Security Tag Systems, Baker Maxham Callan & Jester, June 18, 1985: US04523356 (45 worldwide citation)

A ball clutch mechanism for restraining a pin from longitudinal movement, including an anvil, a radially symmetrical cup, a spring and two two-ball sets of uniformly dimensioned balls. The anvil has an axial bore for axially receiving the pin. The cup has a confining end, a tapered interior wall and ...


2
Lincoln H Charlot Jr: Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation. Security Tag Systems, Brown & Martin, November 6, 1984: US04481428 (43 worldwide citation)

A batteryless, portable, frequency divider including a first LC circuit that is resonant at a first frequency for receiving electromagnetic radiation at the first frequency; a second LC circuit that is resonant at a second frequency that is one-half the first frequency; and a transistor coupling the ...


3
Dennis L Hogan, John L Lynch, Lincoln H Charlot Jr: Expulsion of detrimental substance from theft-deterrent device. Security Tag Systems, Edward W Callan, October 8, 1991: US05054172 (40 worldwide citation)

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 ...


4
Lucian G Ferguson, Lincoln H Charlot Jr: Frequency-dividing transponder and use thereof in a presence detection system. Security Tag Systems, Edward W Callan, February 23, 1988: US04727360 (38 worldwide citation)

A batteryless, portable, transponder useful in a tag for a presence detection system. The transponder detects electromagnetic radiation at a first predetermined frequency and responds to said detection by transmitting electromagnetic radiation at a second frequency that is a subharmonic of the first ...


5
Lincoln H Charlot Jr, Carter W Clarke Jr: Detrimental-substance-containing theft-deterrent device. Security Tag Systems, Edward W Callan, July 16, 1991: US05031287 (34 worldwide citation)

A device for deterring theft of a protected article, including a pin and clutch for attaching the device to the article, with the pin and clutch being embodied in two components that are adapted to be locked together on opposite sides of a portion of the protected article to prevent unauthorized rem ...


6
Fred W Herman, Lincoln H Charlot Jr, Ming R Lian, Douglas A Drew: Adjusting magnetic bias field intensity in EAS presence detection system to enhance detection. Security Tag Systems, Edward W Callan, April 11, 1995: US05406262 (25 worldwide citation)

An EAS presence detection system includes a transmitter for transmitting an electromagnetic radiation signal of a first predetermined frequency into a surveillance zone; a tag for attachment to an article to be detected within the surveillance zone, the tag containing a transponder including a mater ...


7
John L Lynch, Lincoln H Charlot Jr: Release of pin-clutch mechanism in theft-deterrent device. Security Tag Systems, Edward W Callan, December 3, 1991: US05069047 (20 worldwide citation)

An apparatus for releasing locked components of a theft-deterrent device includes a seat for receiving a component of the theft deterrent device that contains a clutch and a ferromagnetic anvil that is positioned by a spring to force the clutch to apply pressure against an inserted pin that is ancho ...


8
Lincoln H Charlot Jr: Signal-powered frequency-dividing transponder. XLINK Enterprises, Edward W Callan, May 14, 1996: US05517179 (19 worldwide citation)

A batteryless, portable frequency divider, such as used in presence detection systems for article surveillance or as used for article-location determination, includes a series LC resonant circuit connected directed across a parallel LC resonant circuit. One circuit is resonant at a first frequency a ...


9
Fred W Herman, Lincoln H Charlot Jr: Portable, batteryless, frequency divider consisting of inductor and diode. Security Tag Systems, Edward W Callan, June 2, 1987: US04670740 (18 worldwide citation)

A batteryless, portable, frequency divider consists of a single resonant circuit consisting of an inductor and a diode. The resonant circuit detects electromagnetic radiation at a first predetermined frequency and responds to said detection by transmitting electromagnetic radiation at a second frequ ...


10
Lincoln H Charlot Jr: Pin-clutch mechanism for theft-deterrent device. Security Tag Systems, Edward W Callan, June 11, 1991: US05022244 (16 worldwide citation)

A clutch mechanism includes a ferromagnetic anvil having an axial bore for axially receiving a pin; a cup axially aligned with the anvil for receiving a pin that is axially received by the bore of the anvil, wherein the anvil is longitudinally movable along its bore axis with respect to the cup; a s ...