GB951985A - Improvements in and relating to electric writing systems - Google Patents
Improvements in and relating to electric writing systemsInfo
- Publication number
- GB951985A GB951985A GB40662/61A GB4066261A GB951985A GB 951985 A GB951985 A GB 951985A GB 40662/61 A GB40662/61 A GB 40662/61A GB 4066261 A GB4066261 A GB 4066261A GB 951985 A GB951985 A GB 951985A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording
- stylus
- pulses
- transistor
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/24—Apparatus or circuits at the receiving end
- H04L15/28—Code reproducing apparatus
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/08—Registering or indicating the production of the machine either with or without registering working or idle time
- G07C3/12—Registering or indicating the production of the machine either with or without registering working or idle time in graphical form
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/601—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors using transformer coupling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Recording Measured Values (AREA)
Abstract
951,985. Recording-apparatus. CLEVITE CORPORATION. Nov.14, 1961 [Nov. 22, 1960], No. 40662/61. Heading G1J. [Also in Division H3] An electric recording system comprising a stylus electrode fed with a pulsating D. C. potential and connected in parallel with an inductive impedance selectively adjustable between high and low values so as to control whether the stylus records or not. A roll of paper 20 is fed past a recording stylus 16 connected to a source of D. C. pulses 10 through a resistor R1. A transformer winding W1 is connected between the electrode 16 and the base electrode 18 and has normally such a high impedance that the recording pulses are effective. When, however, a control potential at terminal 30 renders a transistor 24 conducting the impedance of the winding W1 becomes effectively very low so that the recording pulses are diverted and recording ceases. Transistor 24 may be supplied from a further transistor amplifier in which case for the same input signal the system will record when the first embodiment is not recording and vice versa, (Fig. 2, not shown). In a further embodiment two such systems are connected in parallel whereby when one records the other does not and vice versa so that the absence of a trace on either roll indicates a fault. The system is particularly applicable to monitoring the occurrence or duration of events.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71054A US3142065A (en) | 1960-11-22 | 1960-11-22 | Transistor switching circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB951985A true GB951985A (en) | 1964-03-11 |
Family
ID=22098960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40662/61A Expired GB951985A (en) | 1960-11-22 | 1961-11-14 | Improvements in and relating to electric writing systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3142065A (en) |
| GB (1) | GB951985A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3335422A (en) * | 1963-10-03 | 1967-08-08 | Hewlett Packard Co | Event recorders employing semiconductive switching elements |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2543779A (en) * | 1946-08-10 | 1951-03-06 | Faximile Inc | Facsimile safety device |
| US2576395A (en) * | 1948-10-28 | 1951-11-27 | Raytheon Mfg Co | Recording and indicating system |
| US2938174A (en) * | 1955-09-14 | 1960-05-24 | Honeywell Regulator Co | Condition responsive apparatus |
| US2922899A (en) * | 1956-05-15 | 1960-01-26 | Ibm | Transistor control circuit |
| US2994815A (en) * | 1957-08-07 | 1961-08-01 | Superior Electric Co | Load control circuit |
| US2987367A (en) * | 1958-10-03 | 1961-06-06 | Hazeltine Research Inc | Driving circuit for electrolytic recorders |
-
1960
- 1960-11-22 US US71054A patent/US3142065A/en not_active Expired - Lifetime
-
1961
- 1961-11-14 GB GB40662/61A patent/GB951985A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3142065A (en) | 1964-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB866343A (en) | Improvements in or relating to magnetic recording and reading systems | |
| US2900215A (en) | Transistor record driver | |
| GB1113162A (en) | Recording apparatus and communication system including such apparatus | |
| JPS6047353U (en) | Preset equalization circuit for data bit transmission line | |
| GB951985A (en) | Improvements in and relating to electric writing systems | |
| GB1045661A (en) | Improvements in or relating to magnetic recording systems | |
| GB1508753A (en) | Line state detection circuit arrangements | |
| GB960728A (en) | Memory sensing circuit | |
| GB849142A (en) | Output devices for storage matrices | |
| GB966438A (en) | Improvements in or relating to magnetic transducing systems | |
| GB1059179A (en) | Comparison read-out circuit | |
| GB1072047A (en) | Improvements in or relating to temperature-compensated transistor amplifiers and motor speed control systems utilizing same | |
| GB1205053A (en) | Electronic control circuits | |
| GB844800A (en) | Improvements in or relating to magnetic transducing devices | |
| US3129428A (en) | Safety circuit for transistor amplifier | |
| US3434123A (en) | Sense amplifier for magnetic memory | |
| GB1372794A (en) | Automatic gain control circuits | |
| US3919659A (en) | Device for amplifying the alternating component of a variable signal having a continuous component | |
| GB913230A (en) | Magnetic recording system | |
| GB988981A (en) | Improvements in or relating to read/write amplifier circuits | |
| US2978686A (en) | Read-write amplifier system | |
| GB1043821A (en) | Electrolytic facsimile recorder apparatus | |
| GB798578A (en) | Transistor memory circuit | |
| GB975797A (en) | A matrix arrangement for reading digital signals | |
| JPS56117382A (en) | Read-in control system in magnetic recording and playback device |