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Flight Time Ribbon Transducer

IP.com Disclosure Number: IPCOM000077516D
Original Publication Date: 1972-Aug-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Baumberger, JG: AUTHOR

Abstract

Hammer flight time in an impact type mechanical printer may be measured by the use of a special conductive ribbon, which replaces the ordinary inked ribbon in the printer. In Fig. 1, there is shown a ribbon which is fed from a supply spool or reel 3, onto a take-up reel 5, in the usual manner, the ribbon being carried over suitable nonconductive guide rolls 7 and 9 so as to pass between the platen 11 and the print hammers, one of which is indicated at 13. The platen 11 is made of conductive material, and the nonconductive ribbon 1 is provided with two conductive strips thereon on the side nearest the platen as shown in Fig. 2 at 15 and 17, respectively. The dotted outline in Fig. 2 shows the impact area, produced by hammer 13 striking the ribbon and impelling it against the conductive platen 11.

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Flight Time Ribbon Transducer

Hammer flight time in an impact type mechanical printer may be measured by the use of a special conductive ribbon, which replaces the ordinary inked ribbon in the printer. In Fig. 1, there is shown a ribbon which is fed from a supply spool or reel 3, onto a take-up reel 5, in the usual manner, the ribbon being carried over suitable nonconductive guide rolls 7 and 9 so as to pass between the platen 11 and the print hammers, one of which is indicated at 13. The platen 11 is made of conductive material, and the nonconductive ribbon 1 is provided with two conductive strips thereon on the side nearest the platen as shown in Fig. 2 at 15 and 17, respectively. The dotted outline in Fig. 2 shows the impact area, produced by hammer 13 striking the ribbon and impelling it against the conductive platen 11. It will be obvious that at the time the hammer strikes the ribbon and platen, a conductive path is established between the conductive strips 15 and 17 forming a portion of ribbon 1.

Test connections are established with the conductive strips on ribbon 1 by the commutator element 19, which has two conductive elements on it, not shown, which make contact with the conductive strips on the ribbon as the ribbon is moved past the device 19. These two strips provide a connection between an external source of electrical energy 21 and a resistor 23. The double-headed arrow on the device 19 indicates that it can be moved either into an operative positi...