Analysis of information sources in references of the Wikipedia article "Computer mouse" in English language version.
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The counters needed for X and Y simply count through four states, in either direction (up or down), changing only one bit at a time (i.e. 00, 01, 11, 10). This is a simple case of either a Gray-code counter or a Johnson counter (Moebius counter).(1+3+2*11+2+2*1+2+2*4+1 pages)
[…] Although it is commonly believed that the story of how the mouse got its name has been lost in history, Roger Bates, who was a young hardware designer working for Bill English, has a clear recollection of how the name was chosen. […] He remembers that what today is called the cursor on the screen was at the time called a "CAT". Bates has forgotten what CAT stood for, and no one else seems to remember either, but in hindseight, it seems obvious that a CAT would chase the tailed mouse on the desktop. […](336 pages)
{{cite news}}: CS1 maint: periodical has ISBN (link)[…] The encoders are made by MCB in France, „codeur à contacts" type CC27E08. […] The encoders produce a 4-bit Gray code (only a single bit will change between adjacent states) with 14 states. Also, each individual output maintains its value for at least two successive states; that allows for a somewhat slower time constant on de-bouncing the contacts. […] This sequence is repeated 5 times for a full revolution of the encoder. Since the rubber O-ring on the encoder wheel has a diameter of 13 mm [0.51 in], that makes for a resolution of 5*14 counts / (π*13 mm) = 1.7 counts/mm = 43.5 counts/inch. […](NB. See also: Encoder remarks.)
{{cite web}}: CS1 maint: deprecated archival service (link) CS1 maint: numeric names: authors list (link)[Pointer acceleration] functions increase the mouse gain with increasing mouse velocity.
[…] Mallebrein hatte die Maus für Telefunken entwickelt, das Unternehmen verkaufte sie ab 1968 zusammen mit seinem damaligen Spitzencomputer TR 440. Allerdings nur 46 Mal, vor allem an Universitäten, der Rechner war mit bis zu 20 Millionen Mark praktisch unerschwinglich teuer, sagt Mallebrein. […] Seine Maus – für 1500 Mark zu haben – geriet in Vergessenheit. Ein Patent gab es auch nicht. "Wegen zu geringer Erfindungshöhe", stand damals im Schreiben des Patentamts, erinnert sich der Senior. "Über Anwendungsmöglichkeiten war damals gar nicht gesprochen worden, nämlich dass die Maus Mensch-Maschine-Interaktion fahren kann." […]
The mouse was conceived by the computer scientist Douglas Engelbart, developed by Xerox PARC, and made marketable by Apple
[…] When and under what circumstances the term "the mouse" arose is hard to pin down, but one hardware designer, Roger Bates, has contended that it happened under Mr. English's watch. Mr. Bates was a college sophomore and Mr. English was his mentor at the time. Mr. Bates said the name was a logical extension of the term then used for the cursor on a screen: CAT. Mr. Bates did not remember what CAT stood for, but it seemed to all that the cursor was chasing their tailed desktop device. […]
[…] The Encoders made by MCB transmit rotation through a 4-bit Gray code alternating between 14 possible configurations while only changing one bit each […] The commitment to a Gray code with only 14 possible configurations instead of one with 16 configurations may be caused by limitations on the part of the encoders. Within a full rotation, the encoders cycle through the Gray code for four times, resulting in 56 signals per turn. To rotate the encoders by 90° (14 signals), the RKS needs to be moved by around 10 mm [0.39 in]. While modern encoders use a 2-bit (i.e. 4 configurations) Gray code, the advantage of this 4-bit encoder lies in the detection of missed bit changes. If up to 6 bit changes would pass undetected, it would still be possible to find out the direction the encoder rotated in and then interpolate the movement of the mouse cursor. The Encoders work completely passive and simply connect or disconnect the four data cables from an input cable that can be connected to either ground or a power supply. The button of the RKS works in a similar way using one cable for input and one for output and connecting those while pressed. […] In total, 12 cables are used to connect the RKS to the TR-440 – four data cables for each encoder, one input cable for both encoders, one ground for the upper metal plate, one input for the button and one output for the button. […](NB. Contains some historical photos. See also: Encoder remarks.)
[…] When and under what circumstances the term "the mouse" arose is hard to pin down, but one hardware designer, Roger Bates, has contended that it happened under Mr. English's watch. Mr. Bates was a college sophomore and Mr. English was his mentor at the time. Mr. Bates said the name was a logical extension of the term then used for the cursor on a screen: CAT. Mr. Bates did not remember what CAT stood for, but it seemed to all that the cursor was chasing their tailed desktop device. […]
[…] The Encoders made by MCB transmit rotation through a 4-bit Gray code alternating between 14 possible configurations while only changing one bit each […] The commitment to a Gray code with only 14 possible configurations instead of one with 16 configurations may be caused by limitations on the part of the encoders. Within a full rotation, the encoders cycle through the Gray code for four times, resulting in 56 signals per turn. To rotate the encoders by 90° (14 signals), the RKS needs to be moved by around 10 mm [0.39 in]. While modern encoders use a 2-bit (i.e. 4 configurations) Gray code, the advantage of this 4-bit encoder lies in the detection of missed bit changes. If up to 6 bit changes would pass undetected, it would still be possible to find out the direction the encoder rotated in and then interpolate the movement of the mouse cursor. The Encoders work completely passive and simply connect or disconnect the four data cables from an input cable that can be connected to either ground or a power supply. The button of the RKS works in a similar way using one cable for input and one for output and connecting those while pressed. […] In total, 12 cables are used to connect the RKS to the TR-440 – four data cables for each encoder, one input cable for both encoders, one ground for the upper metal plate, one input for the button and one output for the button. […](NB. Contains some historical photos. See also: Encoder remarks.)
[…] The encoders are made by MCB in France, „codeur à contacts" type CC27E08. […] The encoders produce a 4-bit Gray code (only a single bit will change between adjacent states) with 14 states. Also, each individual output maintains its value for at least two successive states; that allows for a somewhat slower time constant on de-bouncing the contacts. […] This sequence is repeated 5 times for a full revolution of the encoder. Since the rubber O-ring on the encoder wheel has a diameter of 13 mm [0.51 in], that makes for a resolution of 5*14 counts / (π*13 mm) = 1.7 counts/mm = 43.5 counts/inch. […](NB. See also: Encoder remarks.)
Peripheriegeräte […] Bildschirmarbeitsplatz […] Steuermöglichkeiten […] Eingabetastatur, Funktionstastatur, Rollkugelsteuerung […](22 pages)
[…] Mallebrein hatte die Maus für Telefunken entwickelt, das Unternehmen verkaufte sie ab 1968 zusammen mit seinem damaligen Spitzencomputer TR 440. Allerdings nur 46 Mal, vor allem an Universitäten, der Rechner war mit bis zu 20 Millionen Mark praktisch unerschwinglich teuer, sagt Mallebrein. […] Seine Maus – für 1500 Mark zu haben – geriet in Vergessenheit. Ein Patent gab es auch nicht. "Wegen zu geringer Erfindungshöhe", stand damals im Schreiben des Patentamts, erinnert sich der Senior. "Über Anwendungsmöglichkeiten war damals gar nicht gesprochen worden, nämlich dass die Maus Mensch-Maschine-Interaktion fahren kann." […]
The counters needed for X and Y simply count through four states, in either direction (up or down), changing only one bit at a time (i.e. 00, 01, 11, 10). This is a simple case of either a Gray-code counter or a Johnson counter (Moebius counter).(1+3+2*11+2+2*1+2+2*4+1 pages)
The mouse was conceived by the computer scientist Douglas Engelbart, developed by Xerox PARC, and made marketable by Apple