| |
KF5JRV > TECH 08.11.16 13:47l 21 Lines 890 Bytes #999 (0) @ WW
BID : 4960_KF5JRV
Read: GUEST
Subj: Barrett Adding Machine
Path: IW8PGT<CX2SA<N0KFQ<KF5JRV
Sent: 161108/1240Z 4960@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Barrett Adding Machine Company
Barrett produced their non-lister in 6- and 10-column
versions. Complemetary subtraction digits were on a narrow metal
strip on the right of the keyboard, thereby allowing the use of
standardized keytops having only the single larger digits. The
upper left corner key was used to enter all 9s into the the
machine, probably preparatory to a subtraction operation.
A 6-column "messanine attachment" was offered for the 10-column
model that provided a way to multiply Apparantly one of the
values would be set into the attachment and the lever pulled
for the number of units of the other value, the attachment shifted
left one column and the lever pulled for the tens value, etc.
While it made multiplying on a keyset machine possible, it was
certainly not as efficient as a Comptometer for multiplying.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
Read previous mail | Read next mail
| |
