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Patent Agency Ranking
公开(公告)号：DE1953612A1
公开(公告)日：1970-05-06
申请号：DE1953612
申请日：1969-10-24
Applicant: IBM
Inventor： JOHANAN JULIUSBURGER HANS , RAYMOND STILWELL JUN GEORGE
Abstract: 1,251,580. Code converters. INTERNATIONAL BUSINESS MACHINES CORP. 15 Oct., 1969 [29 Oct., 1968], No. 60663/69. Heading G4H. A coding circuit comprises a plurality of vertical conductors 12-1 to 12-N and a plurality of horizontal conductors 14-1 to 14-M, each conductor having an associated latch 24-1 to 24-N and 26-1 to 26-M, and a plurality of switching elements 16, 18, 20, 22, one at each cross-over point, operable to interconnect the associated pair of conductors, whereby the latch associated with each connected conductor is set to the set condition. Each latch comprises a pair of interconnected transistors connected to a source 42 via resistors and provides an output V1 to VN and H1 to HM to utilization device 90. The latches 24-1 to 24-N are controlled by the corresponding conductors 12-1 to 12-N via gating transistors 36-1 to 36-N. Latches 26-1 to 26-N are connected directly to the horizontal conductors. To prevent other latches being set after a first pair are set, locking transistor 44 is provided which when conducting inhibits the setting of the remaining latches. Transistor 44 is connected by resistors 50-1 &c. to the bases of all the gating transistors 36-1 &c., and by diodes 52-1 &c. to their collectors. When any of latches 24-1 to 24-N is set a signal is applied to the bases of strobe transistor 47 which conducts, passing a signal via gate 96 to actuation means 92 which applies a signal to device 90 to cause actuation. The output of actuation means 92 is also applied to the base of transistor 44 which conducts to reduce the voltage on the latch transistors and thereby prevent the setting of any further latches. If more than one latch 24-1 to 24-N is set the combined current passing through the base emitter junction of transistor 47 and through reset transistor 54 causes a sufficient voltage across resistor 76 to overcome the bias of diode 80 to cause transistor 66 to conduct. An output signal on lead 100, signifying that more than one latch has set, closes gate 96 to prevent an actuation signal from reaching the actuation means 92 to operate the device 90. A similar circuit causes transistor 68 to conduct if more than one of the latches 26-1 to 26-M is set. When the cycle of device 90 is complete a reset pulse is sent over line 102 to cause normally conducting reset transistors 54, 56 to turn off removing the ground paths of the conducting transistors in the set latches. These latches are accordingly reset. In another form (Fig. 2, not shown) a latch is set by pulling down the potential of the normally conducting transistor. This reduction of voltage is used as a strobe signal and the interlock signal causes the bases of the gate transistors to be grounded. Specification 1,134,507 is referred to.
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公开(公告)号：DE1515911A1
公开(公告)日：1969-12-11
申请号：DE1515911
申请日：1965-12-28
Applicant: IBM
Inventor： ABRAMSON PAUL , RAYMOND STILWELL JUN GEORGE
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公开(公告)号：DE2001669A1
公开(公告)日：1970-07-30
申请号：DE2001669
申请日：1970-01-15
Applicant: IBM
Inventor： ABRAMSON PAUL , RAYMOND STILWELL JUN GEORGE
Abstract: 1,254,230. Automatic exchange systems; voice frequency signalling. INTERNATIONAL BUSINESS MACHINES CORP. 11 Dec., 1969 [15 Jan., 1969],No. 60451/69. Headings H4K and H4R. In a system for transmitting alpha-numeric characters over a telephone system, each character is transmitted in the form of two tones transmitted in series and within the duration of a third transmitted tone. The system described can be used for transmitting punch card data to a central punch. The Specification refers to prior art system which transmit characters as three simultaneously transmitted tones each selected from a group of four tones and states that additional frequencies (e.g. bent frequencies) generated during transmission over a telephone network cause errors. By employing transmission of only two tones at a time, one from each of two groups of four tones, the tone frequencies can be selected to avoid such errors and the tone present throughout the transmission of a character is longer than any simulated signal due to speech. As described, a keyboard sender has one key for each character. When a key is depressed it closes a bank of contacts. One contact pair enables one of four inputs on an oscillator causing it to generate a tone from one group, a second contact pairsimilarly enables a second oscillator to generate a tone of the second group and a third contact pair enables a timer which after a short interval operates a changeover switch to disconnect the second contact pair and to cause a fourth contact pair to enable a different input on second oscillator, causing the tone of that oscillator to change. The Figure shows a detector. Actuators 47 to 50 respond to tones of the first set giving outputs on corresponding lines 55 to 58 and actuators 67 to 70 similarly provide outputs on lines 75 to 78 in response to tones of the second set. OR gates 59 and 79 connected lines 55 to 58 and 75 to 78 to an AND gate arranged to respond while one tone of each set is present resetting bi-stables 81 to 84 and enabling a timer 66 which provides an output if its input is enabled for a predetermined time. Resetting of the bi-stables enables AND gates 90 and 85 to 88 such that one bi-stable is set corresponding to the detected tone of the second group. The timer times out while the second transmitted tone of the second group is being received and enables and gates 61 to 64, 91 to 94 and 95 to 98 to provide three simultaneous output (each a marking on one out of four lines) one for each tone of the character.
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公开(公告)号：DE2001703A1
公开(公告)日：1970-07-30
申请号：DE2001703
申请日：1970-01-15
Applicant: IBM
Abstract: 1,248,382. Electric selective signalling. INTERNATIONAL BUSINESS MACHINES CORP. 6 Jan., 1970 [15 Jan., 1969], No. 573/70. Heading G4H. [Also in Division H1] An encoding device comprises first electrical conductors 34, 36, 40, 42, &c., second electrical conductors 44, 46, &c., switches 32, 38, 52, &c., for selectively connecting the first and second conductors, third electrical conductors 48 for permanently connecting together selected ones of the first conductors to form output conductors H1-H3, H1 1 -H3 1 and fourth electrical conductors 50 for permanently connecting together selected ones of the second conductors to form output conductors V1-V3, V1 1 -V3 1 . Actuation of any one of the switches connects a pair of the first conductors to a pair of the second conductors thus causing a current flow in a unique combination of four of the output conductors. In a modification a matrix of sxteen by sixteen manual switches is used, actuation of any one of the switches providing signals on four of the sixteen output conductors. Instead of using manual switches, the first and second conductors may be connected by optically actuated photoconductors.
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公开(公告)号：DE1437699A1
公开(公告)日：1968-10-24
申请号：DE1437699
申请日：1965-04-07
Applicant: IBM
Abstract: 1,073,054. Selective signalling. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 22, 1965 [April 20, 1964], No. 12006/65. Heading G4H. At a central station, a magnet (12), Fig. 1 (not shown) is rotated 4 times as fast as a magnet (32), so that while one of reed switches (41, 43, 45, 47) is closed by magnet (32), pulses are induced in coils (21-23) by magnet (12), and while one of reed switches (42, 44, 46, 48) is closed, pulses are induced in coils (24-26). The pulses from coils (21-23) scan three switches (101-103) at each of four remote stations (A-D), but since only one switch (41, 43, 45, 47) is closed at a time the signals from one station (A-D) at a time are passed to output (72). The pulses from coils (24-26) provide binary coded indications of the respectiveremote station identities by way of diodes (122- 128) and switches. (42, 44, 46, 48), only one of which can be closed at a time, the identity pulse train following the data from the respective remote station. In Fig. 2 (not shown) pulses from coils (21-26) scan six switches at each station (A-D), two adjacent reed switches such as (41, 42) passing the first and last three signals from the associated remote station to respective gates (134, 136) which are enabled by the combined pulses from coils (21-23) and (24-26) respectively.
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