51
Thomas W Karpen, William H Havens, Dennis W McEnery, Brian L Jovanovski: Bar code reader for reading high to low contrast bar code symbols. Welch Allyn, Wall Marjama Bilinski & Burr, September 7, 1999: US05949054 (183 worldwide citation)

A bar code reader is provided which can read bar code symbols of varying contrast, from high to medium to low contrast. The bar code reader includes a digitizing circuit which digitizes an analog signal representing the reflectance function of a scanned bar code by comparing the analog signal to a t ...


52
Andrew Longacre Jr, Robert M Husssey: Object sensor system comprising controlled light source. Welch Allyn Data Collection, Wall Marjama & Bilinski, October 2, 2001: US06298175 (183 worldwide citation)

This relates to a system for sensing the presence of an object in the field of view of an imaging assembly of a stationary position optical reader. The system includes a light source disposed in a field of view of the imaging assembly, which is configured to emit light in the direction of the imagin ...


53
William H Havens, Charles M Hammond Jr, Andrew Longacre Jr: Reduced power scanner for reading indicia. Welch Allyn, Harris Beach & Wilcox, May 3, 1994: US05308962 (180 worldwide citation)

A scanner is provided for reading a target containing indicia, such as bar codes, which includes a means for directing the a light source so that it illuminates a target, a photodetector that generates an electrical signal indicative of the intensity of the detected light, a means for decoding the e ...


54
Raymond A Lia: Borescope or endoscope with fluid dynamic muscle. Welch Allyn, Wall and Roehrig, January 3, 1989: US04794912 (175 worldwide citation)

A fluid dynamic muscle contracts when air or hydraulic pressure is applied to it. The muscle has a long elastomeric bladder covered by a long tubular braid of flexible but inextensible fibers or filaments. When the bladder is inflated the braid is forced to expand laterally, which shortens it axiall ...


55
Charles Mitchell Hammond Jr: Apparatus and method for reducing imaging errors in imaging systems having an extended depth of field. Welch Allyn, Wall Marijama Bilinski & Burr, August 1, 2000: US06097856 (173 worldwide citation)

An improved opto-electronic imaging system which is adapted for use with incoherently illuminated objects, and which produces final images having a reduced imaging error content. The imaging system includes an optical assembly for forming an intermediate image of the object to be imaged, an image se ...


56
Andrew Longacre Jr, Robert M Hussey: Bar code reader configured to read fine print barcode symbols. Welch Allyn Data Collection, Wall Marjama & Bilinski, July 24, 2001: US06264105 (173 worldwide citation)

In the present invention, a bar code reader captures an initial image map corresponding to a scene, then subjects the initial image map to an interpolation step wherein values for constructed pixels positionally intermediate pixel values of the initial image map are interpolated as a function of the ...


57
Charles M Hammond Jr, William H Havens, Andrew Longacre Jr: Intimate source and detector and apparatus employing same. Welch Allyn, Harris Beach & Wilcox, July 4, 1995: US05430286 (167 worldwide citation)

There is provided a system of detecting mark-sense indicia wherein the images of a light source and the region of sensitivity of a light sensor are substantially coaxial, coplanar, and coextensive throughout the working depth of field. This system is insensitive to the laminate and the diffusion eff ...


58
Thomas Edward Pelchy, James Edward Grecco, Edward Arthur Johnson, Robert L Vivenzio, Douglas J West, Richard L Bingham: Tab imager assembly for use in an endoscope. Welch Allyn, Wall Marjama Bilinski & Burr, January 12, 1999: US05857963 (167 worldwide citation)

A solid state imager assembly for use in an endoscope in which a TAB imager package is mounted within the horizontal leg of a T-shaped support member. Circuitry for servicing the imager is mounted on the vertical leg of the support member. In one embodiment of the invention, the vertical component o ...


59
Robert J Wood, Earl H Slee, Gregory E Pasik, Michael J Pileski: Servo actuated steering mechanism for borescope or endoscope. Welch Allyn, Wall and Roehrig, July 17, 1990: US04941454 (162 worldwide citation)

This invention involves a cable bendable borescope in which opposing cable pairs are displaced to deflect the tip of the borescope in the perpendicular planes of motion. A servo motor is connected to each pair of actuating cables to selectively displace one or the other in accordance with the rotati ...


60
Thomas W Karpen: Optical imaging assembly having improved image sensor orientation. Welch Allyn, Wall Marjama Bilinski & Burr, November 17, 1998: US05837985 (161 worldwide citation)

An imaging assembly having a 2D image sensor so oriented in relation to its supporting structure that, when a reader including the imaging assembly is held in its normal operating position during the reading of a 1D bar code symbol, the image of that 1D symbol is aligned with a diagonal of the image ...