Having totally destroyed a perfectly good typewriter, he's happy as a clam. First, I hope he's learned that you press two levers and the entire platen can be popped out-- without taking off the handles! Second, I hope he's updated his attitude from 'take it apart to see what makes it go' to 'I wonder why it's not working properly-- how can it be fixed?'
I wonder if he has since learned this whole machine was designed to be taken out of the case without any tools... or that the ribbon didn't come out because he released the correction ribbon first...
He did an autopsy on a typewriter that was not dead. Sad to see it dismantled - although it's interesting to see it taken apart. I rehabilitated mine and use it regularly.
I've taken a few of these apart many years ago.. I still got the motors (same as in the video), the motors in these always had difficulties getting up to speed and had low torque, so IBM got around that by putting a centrifugal clutch on the motor shaft so when the motor finally got up to speed the clutch engaged the belt drive and the typewriter would work.
The “differential” is what moves the carriage to the right and left. The mainspring supplies the power to move the carriage to the right and the motor supplies the power to move it to the left. The two pinions are really clutches that facilitate the two different operations.
That clevis arrangement is also used in cars, some of the linkages on the carburetor used them, except that the side bendy bit was separate and clipped on to the shaft. So it was probably used on the car before typewriters or model aircraft. (though it could have been used on real aircraft too)
Family had an IBM Selectric typewriter back in the early 1980's, and it was used a lot. Awesome machine. I live on the Detroit side of the state. Before the Selectric was a manual Underwood large typewriter in the family.
The IBM 1401 computer came out in 1959, and also surprised IBM. They got more orders for the things in the first week than they'd expected for the entire lifetime of the machine. It was sold until 1971. The IBM System/360 came out in the mid 1960s, and used the EBCDIC character encoding. ASCII's first version came out in 1963, the System/360 was announced in 1964, so work had likely already begun on the design of the System/360 long before ASCII existed.
Great analysis done in real time! Congratulations to the author!! I share his appreciation and respect for the IBM Selectric - a true masterpiece of Mechanical Engineering. To continue from where the author left the presentation off... The differential mechanism that he could not figure out in the given time has clutches that engage either the left or right wheels on machine's continuously rotating core shaft: when the left-had clutch engages, the carriage returns to the left ("Return" direction) and when the right-hand clutch engages the carriage advances to the right ("Space bar" direction). The continuously rotating core shaft is inside the larger-diameter shafts that move the left or right wheels. These external shafts engage with the inner shaft only with the help of the respective clutches, when the Return or Space bar keys are pressed. I an not an Selectric specialist, but this is what I understood in my efforts to revive a Selectric III. Therefore, I may be wrong. One question to the author: is there a safe (non-autopsy!) way to move the carriage to the right without the help of the motor? My motor belt and hub are broken, hence I have to get the carriage to the right, out of my way, by hand, in order to remove the broken hub and belt... Right now, it is stubbornly jammed to the left. Thanks and congratulations, again! Constantin
it would be easy you just use every key on the typewriter and see where it hits on the ribbon or how then write a program that would automatically rearange the letters to what you sawon the type writer then use a scanner and put thr ribbon through the computer would write it out for you instead of manually inputing it by hand then it would write out the complete scentinces for you sure it would be more work then writeing it out but once the programs made then you can do it with every ink ribbon you get your hands on or throw it up online so others can use it.
And maybe a snap ring in the catalog, but to every field service technician that's a "Jesus clip". So named for spontaneous remarks made as they whizzed past your face and vanished into thin air.
Having totally destroyed a perfectly good typewriter, he's happy as a clam. First, I hope he's learned that you press two levers and the entire platen can be popped out-- without taking off the handles! Second, I hope he's updated his attitude from 'take it apart to see what makes it go' to 'I wonder why it's not working properly-- how can it be fixed?'
No: The ball actually the simplest part. The mechanism inside the machine is the holy grail. (Its like a mechanical version of a 6 bits DA converter)
I wonder if he has since learned this whole machine was designed to be taken out of the case without any tools... or that the ribbon didn't come out because he released the correction ribbon first...
He did an autopsy on a typewriter that was not dead. Sad to see it dismantled - although it's interesting to see it taken apart. I rehabilitated mine and use it regularly.
I've taken a few of these apart many years ago.. I still got the motors (same as in the video), the motors in these always had difficulties getting up to speed and had low torque, so IBM got around that by putting a centrifugal clutch on the motor shaft so when the motor finally got up to speed the clutch engaged the belt drive and the typewriter would work.
The “differential” is what moves the carriage to the right and left. The mainspring supplies the power to move the carriage to the right and the motor supplies the power to move it to the left. The two pinions are really clutches that facilitate the two different operations.
That clevis arrangement is also used in cars, some of the linkages on the carburetor used them, except that the side bendy bit was separate and clipped on to the shaft.
So it was probably used on the car before typewriters or model aircraft.
(though it could have been used on real aircraft too)
YESSSSSSSSSSSSS. This is the birth of an empire right here. This machine blew my mind the first time I saw it, and it's way before my time.
Poor Selectric...
"A failed surgery is halfway into a successful dissection", as the old medicine students' adage goes.
Family had an IBM Selectric typewriter back in the early 1980's, and it was used a lot. Awesome machine. I live on the Detroit side of the state. Before the Selectric was a manual Underwood large typewriter in the family.
41:31 in and he says, "We're going to have to dig into this." I laughed!
FYI - The design team from IBM that worked on the Selectric: www-03.ibm.com/ibm/history/ibm100/us/en/icons/selectric/team/
Let's see if he can remove and replace the rotate and tilt tapes without issue
Now... put it back together again :D
The IBM 1401 computer came out in 1959, and also surprised IBM. They got more orders for the things in the first week than they'd expected for the entire lifetime of the machine. It was sold until 1971.
The IBM System/360 came out in the mid 1960s, and used the EBCDIC character encoding. ASCII's first version came out in 1963, the System/360 was announced in 1964, so work had likely already begun on the design of the System/360 long before ASCII existed.
Type writer ribbon, the original key-stroke logger.
I love gyro drivers. You think it's a gimmick at first, but they're really handy.
The red release lever underneath the cartridge.
9:33 someone please make that album!
More teardowns yes!
Great analysis done in real time! Congratulations to the author!! I share his appreciation and respect for the IBM Selectric - a true masterpiece of Mechanical Engineering.
To continue from where the author left the presentation off... The differential mechanism that he could not figure out in the given time has clutches that engage either the left or right wheels on machine's continuously rotating core shaft: when the left-had clutch engages, the carriage returns to the left ("Return" direction) and when the right-hand clutch engages the carriage advances to the right ("Space bar" direction). The continuously rotating core shaft is inside the larger-diameter shafts that move the left or right wheels. These external shafts engage with the inner shaft only with the help of the respective clutches, when the Return or Space bar keys are pressed.
I an not an Selectric specialist, but this is what I understood in my efforts to revive a Selectric III. Therefore, I may be wrong.
One question to the author: is there a safe (non-autopsy!) way to move the carriage to the right without the help of the motor? My motor belt and hub are broken, hence I have to get the carriage to the right, out of my way, by hand, in order to remove the broken hub and belt... Right now, it is stubbornly jammed to the left.
Thanks and congratulations, again!
Constantin
1:00 - WHAT?!?! That made me laugh so hard!
What about him unscrewing the platen knobs too
Now try to put it together and leave it as it was!
🧠🧠🧠
I just picked up one that is screaming at me, doesn't work. I think it might be the belt.
it would be easy you just use every key on the typewriter and see where it hits on the ribbon or how then write a program that would automatically rearange the letters to what you sawon the type writer then use a scanner and put thr ribbon through the computer would write it out for you instead of manually inputing it by hand then it would write out the complete scentinces for you sure it would be more work then writeing it out but once the programs made then you can do it with every ink ribbon you get your hands on or throw it up online so others can use it.
I learned to type on one of these. I feel really old now.
I was already grown up and working on them when they came out. How old do you think I feel?
Fantastic video! Keep it up!
ASCII? Not invented here! EBCDIC is the wave of the future.
now arm it again and let it work
And maybe a snap ring in the catalog, but to every field service technician that's a "Jesus clip". So named for spontaneous remarks made as they whizzed past your face and vanished into thin air.
nicely done thank you for another video