31
Thomas W Karpen, Dennis W McEnery, Robert C Gardiner, John A Pettinelli: Exposure control apparatus for use with optical readers. Welch Allyn, Wall Marjama Bilinski & Burr, November 3, 1998: US05831254 (218 worldwide citation)

An exposure control apparatus for use with optical readers, such as bar code readers, which utilize photosensitive image sensors. An illumination signal generating circuit generates an illumination signal having a magnitude that varies in accordance with the time averaged value of the illumination l ...


32
John M Pidhirny, Richard A Monroe, Michael J Pileski, Robert J Wood: Two-dimensional part reader having a focussing guide. Welch Allyn Data Collection, Wall Marjama Bilinski & Burr, April 4, 2000: US06045047 (218 worldwide citation)

An optical reader is suitable for reading 2-dimensional indicia. The optical reading device, that may include a bar code reader, comprises a guide whose length along the optical reader optical axis is such that when that guide contacts the part or equipment surrounding the indicia to be read, that i ...


33
Charles M Hammond Jr, Andrew Longacre Jr, William H Havens: Analog reconstruction circuit and bar code reading apparatus employing same. Welch Allyn, Harris Beach & Wilcox, March 15, 1994: US05294783 (218 worldwide citation)

A bar code detection circuit accepts as input the discretized analog output of a CCD array, and performs piecewise linear reconstruction to produces a continuous polylinear output signal. In the region of a bar/space transition, the output signal is a close approximation of the reflectance function ...


34
William H Havens, Harry R McKinley, Charles M Hammond Jr, Joseph J Morabito, Jeffrey B Powers: Optical assembly and apparatus employing same using an aspherical lens and an aperture stop. Welch Allyn, Harris Beach & Wilcox, March 1, 1994: US05291008 (213 worldwide citation)

There is disclosed an simplified apparatus that enables optical scanners to achieve minimum field curvature and at the same time provide uniformly distributed light on an image sensor. A single element lens, preferably an aspherical lens made of a plastic material is combined with an aperture stop. ...


35
Thomas J Koziol, Michael A Ehrhart, Andrew Longacre Jr, Robert M Hussey: Optical reader having improved reprogramming features. Welch Allyn, Wall Marjama Bilinski & Burr, May 4, 1999: US05900613 (212 worldwide citation)

An optical reading apparatus adapted to scan and decode data in accordance with the enabled ones of the parameters stored in a parameter table. The reader is equipped with random access and erasable read only memories, and with a processor having a menuing program that allows the contents of the par ...


36
Timothy P Meier, Robert M Hussey, Charles P Barber: Indicia sensor system for optical reader. Welch Allyn Data Collection, Wall Marjama & Bilinski, July 1, 2003: US06585159 (211 worldwide citation)

In the present invention, the control unit of an optical reader analyzes image data being generated by the imaging element of the reader and changes the mode of operation of the reader if the image data indicates that machine readable indicia, such as a bar code symbol or a text character, is likely ...


37
Charles P Barber, Carl W Gerst III, George S Smith II, Robert M Hussey, Robert C Gardiner, Matthew W Pankow: Imaging apparatus having imaging assembly. Welch Allyn Data Collection, Heslin Rothenberg Farley & Mesiti P C, October 15, 2013: US08559767 (210 worldwide citation)

There is described an imaging apparatus having an imaging assembly that includes an image sensor. The imaging apparatus can capture a frame of image data having image data corresponding to a first set of pixels of the image sensor. The imaging apparatus can capture a frame or image data having image ...


38
Andrew Longacre Jr, Robert M Hussey: Bar code reader. Welch Allyn, Wall Marjama & Bilinski, March 3, 1998: US05723853 (208 worldwide citation)

A portable, hand-held, self-contained two-dimensional bar code reader adapted to the PDF417 symbology, includes a light source, a photodetector, and a decoder. The decoder comprises an 8 bit microcomputer, having an address space of 64K bytes, but actually using an 8K Byte SRAM for data storage, and ...


39
Eric D Schwartz, Edward B Hubben, Brian L Jovanovski, Vivian L Hunter, Melvin D McCall, Gerard F Beckhusen: Adjustable illumination system for a barcode scanner. Welch Allyn Data Collection, Wall Marjama & Bilinski, April 16, 2002: US06371374 (204 worldwide citation)

An apparatus for adjusting the position of a line of light in barcode space that includes a support frame having a rear housing containing a solid state imager and a pair of support arms extending forwardly from the front of the housing. An imaging lens is mounted between the arms for focusing an im ...


40
Allan I Krauter, Fred C Cope, John H Bean: Biopsy seal. Welch Allyn, Bruns and Wall, March 17, 1987: US04649904 (204 worldwide citation)

A disposable seal is provided for a luer lock end fitting, e.g. for a biopsy channel of an endoscope. The fitting has a tubular luer lock device and a retaining ring surrounding the tubular device. The seal is unitarily molded of a soft elastomer and has a double seal arrangement formed of an apertu ...