US2022965A

US2022965A - Page end indicator

Info

Publication number: US2022965A
Application number: US726929A
Authority: US
Inventors: Louis M Llorens
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-05-22
Filing date: 1934-05-22
Publication date: 1935-12-03
Anticipated expiration: 1952-12-03

Description

5'- 1.. M. LLORENS PAGE END INDICATOR Filed May 22,- 1934 INVENTQR FIG. 3.

QOOOOOOOG FIG. E.

1514 ATTORNEY Patented Dec. 3, 1935 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to line indicators, or page end indicators, for use in indicating on a typewriter, adding machine, or other device using a rotary platen, when the paper or record mate- 5 rial is nearing exhaustion, and for further indicating the amount of record material still available.

One of the principal objects of the invention is to produce a device of this general character,

10 consisting of a few simple parts, cheap to manufacture, easy to, assemble, and highly efficient for the purpose for which it is designed. Other objects will be apparent from the following description and claims.

15 These objects are attained by the mechanism shown in the accompanying drawing, in which Fig. 1 is a somewhat diagrammatic view of a typewriter with the present invention in place thereon.

20 Fig. 2 is a right hand end View of the invention, showing the parts in the position they assume when the record material is entered in the machine.

Fig. 3 is a view similar to Fig. 2, but showing 25 the parts in the position assumed when the record material is nearing exhaustion.

Fig. 4 is an exploded perspective view of the several portions of the mechanism.

Fig. 5 is a fragmentary section taken substan- 30 tially on line 5-5 of Fig. 2.

Like characters or reference refer to like parts in all views.

While the invention has been shown as applied to a standard typewriter, it is quite obvious that 35 it may be applied to adding machines, stenographic machines, and like structures in which a cylindrical platen is used.

Referring to the drawing in detail, l represents a standard typewriter generally, which is provided with the usual cylindrical printing platen II which is rotatably supported upon the usual carriage frame indicated at l2.

At the right hand end, the platen is reduced in diameter as shown at 3, and has attached to 45 it a plate l4 formed with friction-drive fingers l5. Over these fingers it, an indicator drum it is slipped. Drum 66 is provided with indicia as at IT, these numerals being arranged one line-space apart. Drum I6 is formed with a broad bearing 50 I8, and with inner and outer lugs l9 and 2t. Fingers l press against the inner surface of drum it, and tend to rotate the drum with the platen.

Over drum it and the reduced portion l3,

5 passes a cylindrical member 25 formed with a sight opening 22, and openings 23 and 24 for a purpose to be later set forth. The indicia Il may be viewed through opening 22 when drum i6 is permitted to turn. The cylinder 2| is provided with a hub 25 on which the bearing l 8 rests, as clearly seen in Fig. 5.

Secured to cylinder 2| is an anchorage member having arms 26 and 2! resting against the car- 5 riage frame l2, so as to prevent member 2| from turning with the platen. This anchorage memher is formed with a springy finger 28, which constantly presses a wire 29 toward the member 2|. Wire 29 is pinned or otherwise secured to the anchorage member as at 30. Wire 29 has its free end formed into forks 3| and 32. Fork 3| is bent so as to form a V-shaped rider at 33, and fork 32 is bent so as to terminate in a stop element at 34. With the parts assembled, the rider 33 is in register with opening 24, and stop 34 is in the vertical plane of stops I9 and 20, fork 32 being extended through aperture 23.

The operation of the above parts is as fol- 1ows:Starting with no paper in the machine, stop 34 is in the path of stop l9, which it intercepts so as to hold drum l6 against turning. In this, position a blank or unnumbered portion of drum I 6 is visible through opening 22. Upon inserting a sheet of paper (indicated at 35 in Figs. 2 and 3), the sheet in passing under rider 33, forces the entire member 29 rearwardly, thereby bringing stop 34 into the path of stop 20. Drum l6 may now move one step, bringing stop 20 against stop 36, as in Fig. 2. At this time a blank portion of drum it is seen through opening 22. The parts remain thus until the paper nears the end, when the rider 33 drops into opening 24. As this happens, stop 32 passes between stops l9 and 2t], and drum I6 is free to rotate with the platen to expose indicia through the sight opening 22. This indicates to the operator the number of lines which may still be printed before the paper is exhausted.

What I claim as new, and desire to secure by 40 Letters Patent is:

1. The combination of a rotatable platen, an indicating drum, connecting means between said platen and drum permitting simultaneous and relative movements of the platen and drum, stops on said drum, and means cooperative with said stops and record responsive for holding said drum against movement and releasing said drum for movement with said platen.

2. The combination of a rotatable platen, an indicating drum, connecting means between said platen and drum permitting simultaneous and relative movements of the platen and drum, stops on said drum, and a spring-pressed record responsive stop cooperative with said stops for holding said drum against movement and releasing said drum for movement with said platen.

LOUIS M. LLORENS.