Abstract: A light sensor 10 includes two parallel, spaced mask plates 12, 14. A first mask plate 12 has nine, small, spaced holes 38a-i which are in alignment with corresponding holes 36a-i in the second mask plate 14. The light sensor 10 includes a base plate 18 having nine holes 22a-i into which photosensitive devices 26a-i are positioned and the base plate 18 is secured to the outer surface of the second mask plate 14. The photodiodes 26a-i are connected to an indicating means 32 which provides an indication of the light falling upon each photodiode 26a-i individually or upon all of the photodiodes 26a-i collectively.

Abstract: A desk top keyboard display terminal includes a keyboard which may be latched to the front of the terminal or articulated over the edge of a desk to a level convenient for a typist.

Abstract: A cache memory 30 having a thirteen bit word length is illustrated for storing more than one data word read from a system memory 80 having an eight bit word length and providing the stored words to a video display 18 on a reoccurring basis. The cache memory 30 has a storage capacity sufficient to store the words for one row of display text characters. Two system memory bytes are concatenated by a latch 74 and storage buffer 96 prior to writing into the cache memory 30. After the scanning of the first word of the last scan line in the current cathode ray tube (19) display text row, the first word of the new text row is written into the cache memory (30) from the system memory (80). The write procedure is completed before the last word of the new text row is read from the cache memory 30 to the cathode ray tube display 19 during the writing of the first scan line of the new text row.

Abstract: An integrated circuit 14 having an active circuit 19 is formed on a circuit wafer 10. A moat 18 in the field oxide 20 surrounds the active circuit 19. Metallic conductor 30 passes from a location on the active circuit 19 over the moat 18 to a contact area 22. The wafer 10 is covered with a photoshaped silicon nitride layer 18, and a support wafer 40 is secured with adhesive 46 to the circuit side of the circuit wafer 10. The circuit wafer 10 is photoshaped to expose the metallic conductor 30 at the contact area 22, and the contact area 22 is prepared with multiple metal layers 62, 66, 70 for connection to external wiring.

Abstract: A method for manufacturing an integrated circuit thermal print head is illustrated including transistor 20 and a resistor doped region 22 formed on a first surface of a silicon circuit wafer 10. A contamination barrier in the form of a moat 26 filled with silicon nitride 30 is formed around the transistor 20. A support wafer 50 is secured to the first surface of the circuit wafer 10 by an adhesive layer 58. The circuit wafer 10 is thinned, and the exposed surface of the circuit wafer 10 is photoshaped to define wafer segments 68 positioned over the resistor doped region 22.

Abstract: A mechanism for tilting a display screen of a CRT includes a detent gear rack molded in the side of an arch supporting therein a pivotably mounted cabinet housing the CRT. A molded detent lever is slidably attached to a side of the cabinet and is arranged to normally be in engagement with the detent gear rack.

Abstract: A method for manufacturing an integrated circuit device illustrates the preparation of the first surface of a circuit wafer including the placement of fine alignment indicia 34a outside the active chip area. A support wafer 50 is secured to the first surface of the circuit wafer 10 by an adhesive layer 58. The circuit wafer 10 is thinned. Openings 66 are photoshaped in the circuit wafer 10 using wafer flats 51 for alignment. The openings expose alignment indicia 34a which are relief images in the adhesive of the alignment pattern 34. The exposed surface of the circuit wafer 10 is photoshaped, using the indicia 34a for alignment, to define wafer segments 68 positioned over resistor doped regions 22.

Abstract: A facsimile document scanner 10 is illustrated which includes an optical system 23 having a folded optical path 40 and an adjustable lens system 42. A test pattern 60 in the form of a plurality of alternate light and dark stripes 64, 66 is focused upon a linear photodiode array 50 mounted in an integratd circuit pack 51. The number of light and dark stripes 64, 66 is equal to the number of photodiodes in the linear photodiode array 50 across the document width. For adjustment purposes, an oscilloscope 70 is connected to a serial output from the integrated circuit pack 50 and the position of the lens system along the optical path 42 is adjusted and a corresponding adjustment is made to the pointer of the lens holder 45 within the lens housing 43 to obtain the desired image size and focus. The position of the diode array 50 is adjusted with respect to the focused image 72, 74 to obtain the maximum display amplitude.

Abstract: A print hammer mechanism 10 includes a plurality of parallel print hammers positioned for sliding movement within slots 20a-i, 22a-i in the walls 16, 18 of a frame 12. The selective energization of one of a plurality of magnets 61a-i draws the corresponding hammer 30a-i against a rotating roller 52. The roller 52 drives the print hammer from a rest position to a print position. At the print position, a head 40a-i on the selected hammer 30a-i forces a paper medium against a type die 64 with an ink ribbon 62 interposed. Return movement is provided by a coil spring 38a-i attached to the rearward end of the hammer 30a-i.

Abstract: A bracket 18 is illustrated for mounting a light source 24 on a facsimile document scanner 10. The bracket 18 includes a pair of end plates 20, 22 between which the light source 24 is supported. Opposing ends of each plate 20, 22 have hinge pins 30, 30a which engage "L" shaped cutouts 38, 38a in opposing hinge plates 36, 36a mounted on the scanner 10. The hinge pins 30, 30a are held in their respective cutouts 36, 36a by coil springs 60, 60a. The remaining ends of the end plates 20, 22 have lock pins 32, 32a which engage "L" shaped cutouts 42, 42a in lock plates 40, 40a mounted on the scanner 10. Lock clips 50, 50a serves to maintain the lock pins 32, 32a in their respective lock plate cutouts 42, 42a.

Abstract: A facsimile document scanner 10 is illustrated which includes an optical system 23 having a folded optical path 40 and an adjustable focusing lens 42. A test pattern 60 in the form of a plurality of alternate light and dark stripes 64, 66 is printed upon a strip 62 secured to the inner wall of the cabinet 12. When the scanner is at rest, the test pattern 60 is focused upon a linear photodiode array 50 mounted in an integrated circuit pack 51. The number of light and dark stripes 64, 66 is equal to the number of photodiodes in the linear photodiode array 50 across the document width. For adjustment purposes, an oscilloscope 70 is connected to a serial output from the integrated circuit pack 50 and the optical system 23 is adjusted to obtain a uniform signal display 80.

Abstract: A connector clip 12 is shown having a "U" shaped body member 30 including a base 34 and two parallel, extending legs 32. The ends of each of the legs 32 define camming surfaces 42 and a socket retaining notch 44. The clip includes a pair of first spacing feet 47 positioned medially upon each leg 32 and a pair of second spacing feet 36 located at the ends of a base member 34. The feet 36, 47 serve to limit relative movement between the clip 12 and a plug 14 which holds the clip 12 to a circuit board 22. A pair of spaced fingers 48 together with the circuit board 22 and the facing surfaces of the legs 32 define an access opening which serves to align the socket 24 with a plug 14. The second embodiment of FIGS. 5 and 6 includes a pair of arms 50 which engage the circuit board 22 surface opposite the surface upon which the plug 14 is mounted. The arms 50 prevent relative movement between the clip 12 and the circuit board 22.

Abstract: A flexible band positioning device arranged to convert rotaty motion of an outout drum of a stepper motor to linear motion of a carriage supporting a read/write head. A flexible band is attached to the drum and is at least partially wrapped around it. The end portions of the band are each guided around a different idler roller and are attached to a support frame. The idler rollers are rotatably mounted on the carriage and upon wrapping and unwrapping of the band around the drum, caused by rotary movement of the drum, move the carriage linearly.

Abstract: A linear positioning device having a carriage slidably mounted on a guide rail incorporates a rolling bias spring located in a movable pocket formed by the carriage and the guide rod. The spring is formed with a flexible band material in a loop which is affixed to the carriage and is arranged to roll along the guide rod while exerting a force separating the carriage and the guide rod.

Abstract: Twenty-five capacitive keyswitches 16a-e are arranged in a matrix having five row conductors 12a-e and five column conductors 14a-e. A series of five pulses are fed to each row conductor 14a-e in succession through AND gates 41a-e controlled by a counter 34. Each time a row conductor 12a-e is pulsed, all of the column conductors 14a-e are scanned. When one of the column conductors 14a-e is scanned, the associated coupling transistor 54a-e is turned on and the associated discharge transistor 50a-e is turned off. The remaining coupling transistor 54a-e of the remaining columns 14a-e are off and the remaining discharge transistors 50a-e are on.

Abstract: A printer ribbon cartridge mounting assembly includes a printer cartridge having a resilient cantilevered tab with a stepped surface which is arranged to push against a portion of a mounting bracket. The bracket also has an opening which accommodates a portion of the stepped surface, thereby locking the cartridge in place.