Abstract A sweep system for a cathode ray oscilloscope is described in which a single control knob is employed to operate both sweep rate switches of a pair of sweep generators and two sweep mode switches interconnecting such generators by rotation and longitudinal movement of such knob to provide single sweep, delayed sweep, and intensified sweep modes of operation. The switch control means includes a pair of concentric inner and outer shafts which are connected to different rate switches for rotation thereof either selectively or as ganged switches. The sweep output mode switch is operated by longitudinal movement of the inner shaft and the delay time mode switch is operated by movement of the switch knob into and out of its ganged position. The switch knob is attached to the inner shaft and is locked by a detent pin to a control member on the outer shaft in one relative rotational position to rotate both rate switches simultaneously in such ganged position and provide the single sweep operation. The switch knob is pulled outward into a second longitudinal position to disconnect the two switch shafts to enable rotation of only the inner shaft to provide the intensified sweep mode. The knob is then pushed back to the first longitudinal position without ganging the two shafts together to provide the delayed sweep mode.
In an oscilloscope having a pair of sweep generating circuits for operation in normal, intensified, and delayed sweep modes, a switch apparatus which comprises: a first switch for changing the rates of sweep signals produced by one of said pair of sweep generator circuits, said first switch being a rotary switch and said one of said pair of sweep generator circuits being a normal sweep generator circuit; a second switch for changing the rates of sweep signals produced by the other of said pair of sweep generator circuits, said second switch being a rotary switch and said other of said pair of sweep generator circuits being a delayed sweep generator circuit; a third switch for selectively connecting the outputs of said pair of sweep generator circuits to a beam deflection means of a cathode ray tube in said oscilloscope; and switch control means including a tubular outer shaft connected to said second switch and extending through said outer shaft to a single knob which is attached to said inner shaft for rotation thereof and for moving said inner shaft longitudinally between two positions for selectively operating said first and second switches, said inner shaft being coupled to said third switch for operation thereof in response to longitudinal movement of said inner shaft between said two positions; said switch control means also including coupling means for selectively engaging said first switch with said second switch to provide ganged operation thereof or disengaging said first switch to provide independent operation of said second switch.
Claim 2
Dependent Claim
252 words
In an oscilloscope having a pair of sweep generating circuits for operation in normal, intensified, and delayed sweep modes, a switch apparatus which comprises: a first switch for changing the rates of sweep signals produced by one of said pair of sweep generator circuits, said first switch being a rotary switch and said one of said pair of sweep generator circuits being a normal sweep generator circuit; a second switch for changing the rates of sweep signals produced by the other of said pair of sweep generator circuits, said second switch being a rotary switch and said other of said pair of sweep generator circuits being a delayed sweep generator circuit; a third switch for selectively connecting the outputs of said pair of sweep generator circuits to a beam deflection means of a cathode ray tube in said oscilloscope; and switch control means including a tubular outer shaft connected to said second switch and extending through said outer shaft to a single knob which is attached to said inner shaft for rotation thereof and for moving said inner shaft longitudinally between two positions for selectively operating said first and second switches, said inner shaft being coupled to said third switch for operation thereof in response to longitudinal movement of said inner shaft between said two positions; said switch control means also including coupling means for selectively engaging said first switch with said second switch to provide ganged operation thereof or disengaging said first switch to provide independent operation of said second switch.
Claim 3
Dependent Claim
87 words
The switch apparatus according to claim 1 which further includes a fourth switch for applying a selective reference voltage to said delayed sweep generator, and wherein said outer shaft includes a control member attached thereto, said coupling means includes detent means for locking said knob to said control member to enable simultaneous rotation of said inner and outer shafts in the ganged position, said coupling means further including actuating means for operating said fourth switch when said knob is moved into and out of said ganged position.
Claim 4
Dependent Claim
89 words
The switch apparatus according to claim 2 wherein said actuating means includes a coupling member mounted for sliding movement on said outer shaft in engagement with said fourth switch, and a coupling rod engaging said coupling member and mounted for sliding movement within a passageway extending through said control member, and said detent means includes a detent pin resiliently mounted on said knob so that in said ganged position said pin extends into said passageway and moves said coupling rod causing the coupling member to operate said fourth switch.