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 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 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 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.

Abstract: A clip 12 for releasably holding a socket 22 in engagement with a plug 14 soldered to a circuit board 19 is described. The clip 12 includes a pair of legs 30 spaced the width of the plug. Adjacent ends of the legs 30 define locking prongs 34 for engaging the plug 14 and the remaining ends of the clip have opposing notches 41 for engaging the socket. A brace 32 holds the legs in alignment. The brace 32 includes a pair of arms 44 which limit relative movement of the clip 12 with respect to the circuit board 19. A pair of opposing fingers 48 define an access opening 50 in combination with the circuit card to facilitate alignment between the plug 14 and socket 22.

Abstract: A radiation shield 14 for a cathode ray tube 10 neck 16 includes a sleeve 24 of insulating material. Bonded to the inner surface 26 of the sleeve 24 are a plurality of elongated, coaxially oriented spaced conductive elements 30. Similarly, a plurality of elongated, coaxially oriented spaced conductive elements 32 are bonded to the outer surface 28 of the sleeve 24. The inner elements 30 are offset from the outer elements 32. A conductive ring 40 is connected to each of the inner 30 and outer 32 elements along one end of the sleeve 24 and to ground potential by a drain strap 44.

Abstract: A photoelectric circuit for reading punched data tape wherein the circuit compensates for variations in phototransistors and light emitting diodes, dust accumulation and degradation of the light emitting diodes by comparing the light transmitted through a punched section of the tape to the light transmitted through a solid section of the tape.

Abstract: An apparatus for mounting a mirror 20 is described which includes a flat mounting plate 10 having a rectangular mirror opening 12. Positioned about the mirror opening 12 are spaced rectangularly shaped holes 18. Placed against the bottom wall 26 of a "U" shaped channel 22 is a sheet of foam material 34 upon which the back of a front surface mirror 20 is placed. The edges of the walls 28, 30 of the "U" shaped channel have tabs 32 which are placed into the holes 18. The tabs 32 are bent over or deformed to secure the channel 22 and mirror 20 to the mounting plate 10.

Abstract: A printer tractor position clamp has two substantially parallel arms joined by a member having shape and size to engage a guide shaft and to secure a printer tractor to the shaft. Movement of the two arms towards each other releases the clamp from the guide shaft to permit lateral movement of the tractor along the shaft.

Abstract: The drive shaft 30 of a printer 10 engages a tractor 16 which, in turn, moves a paper web 12 across a print mechanism 14. Located on the drive shaft 30 is a drive shaft advance cam 78 which is fixed to drive the shaft 30 and rotate therewith. Additionally, located upon the drive shaft 30 for limited rotational movement with respect to the drive shaft advance cam 78 is a paper advance cam 90. The shape of the drive shaft cam 78 is similar to the shape of the paper advance cam 90. The paper advance cam 90 carries an O-ring 102 defining a high frictional surface for engaging the paper web 12. The door 50 of the tractor 16 carries a paper pressure roller 104 having a circumferential groove 106 positioned for cooperation with the O-ring 102. During normal paper web 12 drive, the cams 78, 90 are out of registration and rotate in unison.

Abstract: A digital voltage comparator is illustrated including a cross-coupled latch 10 having input nodes 12 and 14. After the input nodes 12 and 14 of the latch 10 have been respectively preloaded to the input A and reference E voltage levels during the active state of clock phase .phi..sub.1, the latch is allowed to arrive at a stable state during the active state of clock phase .phi..sub.2. Thereafter, when clock phase .phi..sub.3 is active, the output of the latch 10 is coupled to the input of a single stage shift register 20. The output of the shift register 20 is fed to inverters 22 and 26 and through a voltage divider for preloading the node 14 of the latch 10 during the next active state of clock phase .phi..sub.1.

Abstract: A method of manufacturing a device in a wafer with a P-type semiconductor, includes forming on a surface of the semiconductor body a layer of silicon dioxide doped with an N-type dopant. The portion of the doped silicon dioxide covering the interconnect work site area is removed and a masking layer of an oxidation impervious medium is formed over the wafer and thereafter removed from the field areas, as is the doped silicon dioxide layer. A thin layer of gate oxide is formed over the field areas. A layer of conductive polysilicon is formed over the entire wafer followed by a layer of oxygen impervious masking medium. The conductive polysilicon and masking medium layers are removed from all areas of the wafer except those whereat transistors are to be formed. The wafer is exposed to an oxidizing environment under an elevated temperature producing a field oxide over the exposed gate oxide.

Abstract: A tractor 10 is disclosed for engaging and advancing a web of paper 20 by engaging a series of holes 21 along an edge of the paper 20. The tractor 10 includes a pair of parallel side plates 12, 14 and an elongated guide member 32 defining a continuous guide track 34. The guide member 32 is positioned between the side plates 12, 14 so as to define a continuous guide channel 36 in cooperation with the guide plates 12, 14. The tractor 10 also includes a drive belt assembly 22 comprising a continuous belt 62 carrying a plurality of spaced drive members 38 adapted to engage the holes 21 along the edge of the paper 20. A drive sprocket 33 located at one end of the guide channel 36 engages the drive members 38. Each guide member 38 has a hemicylindrically shaped base 64 with a notch 66 therein, thereby defining two parallel edges 67 which ride along the guide track 34. Additionally, each drive member 38 includes a drive pin 80, the profile of the surface of the drive pin 80 has the shape of a segment of an involute.