US2545582A

US2545582A - Page-end indicator for typewriters

Info

Publication number: US2545582A
Application number: US113687A
Authority: US
Inventors: Jr George G Knieriem
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-09-02
Filing date: 1949-09-02
Publication date: 1951-03-20
Anticipated expiration: 1968-03-20

Description

March 20, 1951 G. G. KNlERlEM, JR 2,545,582

PAGE-END INDICATOR FOR TYPEWRITERS 2 Sheets-Sheet 1 Filed Sept. 2, 1949 1X1 'l;'.\' TOR. GEORGE G. KN/EQ/E J BY WKW/Mflmm av WW ATTOeA/EYS.

March 20, 1951 G. G. KNIERIEM, JR

PAGE-END INDICATOR FOR TYPEWRITERS 2 Sheets-Sheet 2 Filed Sept. 2, 1949 INVENTOR. 6502 GE 6. K/V/E/Q/EM J8,

ATTOEIVEYS.

Patented Mar. 20, 1951 UNITED STATES PATENT OFFICE PAGE-END INDICATOR FOR TYPEWRITERS George G. Knieriem, Jr., Long Beach, Miss.

Application September 2, 1949, Serial No. 1l3,687

4 Claims.

This invention relates to typewriter indicator attachments, and more particularly to an attachment for indicating the proximity of the end of a sheet or the proximity of a predetermined point on the sheet during typing, and which provides an audible signal denoting that the end of the sheet or said predetermined point on the sheet has been reached.

A main object of the invention is to provide a novel and improved page-end indicator for typewriters, said indicator being Very simple in construction, easy to install on a typewriter, and very easy to adjust to provide the desired indication.

A further object of the invention is to provide an improved indicating attachment for typewriters which is very inexpensive to manufacture, which is compact in size, which is reliable in operation, and which provides an audible signal when a predetermined length of the typewritten sheet has been fed through the typewriter.

' Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a top plan view of the side portion of atypewriter provided with a page-end indicating attachment constructed in accordance with the present invention;

Figure 2 is a fragmentary front elevational view of the typewriter of Figure 1, showing the attachment in front elevation, a portion of the attachment being broken away;

Figure 3 is an enlarged cross-sectional detail view taken on line 33 of Figure 2;

Figure 4 is a cross-sectional detail view taken on line 44 of Figure 3; v

Figure 5 is an enlarged cross-sectional detail view taken on line 5-5 of Figure 3;

Figure 6 is an enlarged cross-sectional detail view taken on line 6-6 of Figure 3;

Figure 7 is an enlarged perspective detail view 7 of the signal-release cam member employed in the typewriter attachment of Figure 1.

' Referring to the drawings, ll designates a conventional typewriter, and I2 designates the right end of the roller shaft of the typewriter. The page-end indicator device is indicated generally at 3.

The indicator device comprises a rectangular housing I4 which has end walls l5 and 16, side walls I1 and ill, a top wall I 9, and an intermediate partition wall 20 extending parallel to the side walls 11 and I8, as shown in Figure 3.

Mounted on the irmer side wall [8 is a bell 2|. Rotatably mounted in the lower marginal portions of the end walls l5 and I6 between the walls I1 and 20 is a shaft 22 formed with a worm portion 23. The inner end of shaft 22 has secured thereto a sleeve 24 which is telescoped over and secured to the end of the roller shaft l2, as by a set screw 25. Secured to the outer end of shaft 22 is the roller knob 26. The housing 14 is secured to the frame of the typewriter l l in any suitable manner.

Designated at 21 is a sleeve member which extends rotatably through the intermediate wall member 20, said sleeve member being rotatably supported in

respective bearing sleeves

28 and 29 secured to said wall member 20. At one end thereof sleeve 21 is formed with an annular flange 30 which rotatively engages the end of sleeve 28. Secured to the other end of sleeve 21 is a gear 3| which meshes with the worm portion 23 of shaft 22. aperture 32 having the same axis as sleeve 21, and disposed rotatably in said aperture is a disc 33 which is rigidly secured in parallel relationship to gear 3| by a plurality of bar elements 34 extending from the periphery of disc 33 parallel to the axis thereof and secured to the gear 3|. Secured axially to gear 3| facing disc 33 is a centrally-apertured drum 35 formed with a pcripheral notch 36.

Extending rotatably and slidably through wall l8, sleeve 21, gear 3|, ,drum 35 and disc 33 is a shaft 31. At its left end, as viewed in Figure 8, an enlarged head member 38 is secured to'shaft 31, limiting movement of said shaft to the right. Head member 38 is normally in frictional engagement with a friction disc 51 secured to the wall [8 around the shaft 31, as shown in Figure 3. Secured to the shaft 31 inwardly of wall I8 is an enlarged washer 39. A coiled spring 40 encircles shaft 31 and bears between washer 39 and flange 30, biasing shaft 31 to the left, as viewed in Figure 3. Secured to shaft 31 adjacent drum 35 is a disc 4| formed at its periphery with a projection 42- which normally engages the peripheral edge of drum 35 and holds the shaft against endwise movement to the left until it engages in the notch 36, at which time the shaft is released for movement to the left by the expansion of spring 43. Pivoted at 43 to wall I8 is a lever 44 whose outer end projects through an opening 45 formed in said wall, and carries a striker or hammer 46 disposed adjacent hell 2 I. The inner end of lever 44 is formed with spaced lugs 41 and 48 between which the washer 39 is normally disposed. When the shaft 31 is moved to the left by the entry of lug 42 into notch 36, as above described, washer 39 moves over lug 41, rocking lever 44 clockwise, as viewed in Figure 3, and causing hammer 46 to strike bell 2 l.

Mounted on the outer end of shaft 31 is a ratchet knob 49. Knob 49 is rotatably mounted on a sleeve race member 50 splined to shaft 31 carrying balls 5| which engage in respective spiral recesses 52 formed inside the knob 49. When the The wall I1 is formed with a large circular knob '49 is rotated clockwise, as viewed in Figure 5, the spiral recesses 52 cooperate wedgingly with the balls 5| and sleeve race 5!! to rotate shaft 37 clockwise. Rotation of knob 49 counterclockwise produces no rotation of shaft 31.

Shaft 37 is formed adjacent sleeve race 56 with H a longitudinal slot 53 in which is transversely positioned a pointer bar 54. encircles shaft 31 and bears between pointer bar 54 and the end of sleeve race 59, biasing bar 54 against the left end of slot 53, as viewed in Figure 3.

The outer surface of disc 33 is marked witha scale 56 which may be suitably calibrated, for example, in inches-of circumferential length of the typewriter roller.

In setting the device at the beginning of a page, the pointer 54 is initially at zero positionwith respect to scale 56 and lug 42 is located in notch 35. The operator places the paper in the typewriter, lines the paper up at the desired starting point, then pulls knob 49 outwardly to remove lug 42 from notch 35, and then rotates knob as clockwise, as viewed in Figure 2, to set the pointer bar 54 to the number of inches corresponding to the number of lines to be typed on the sheet. This places lug 552 at a point on the rim of drum spaced from notch 55 in accordance with the number of revolutions of the roller of the typewriter required to move the paper to a position corresponding to the last typewritten line desired on the sheet. The typist proceeds with the typing operation. When the last-desired line is reached on the paper, the lug i2 slips into notch 35, causing the hammer 26 to strike bell 2t, as.

above described. At the same time, the pointer 54 indicates zero on the scale, 55. The" typist is thus provided with both a visual and an audible indication that the last line on the sheet has been reached.

When lug 42 is in engagement with the rim of drum 35, head 38' irictionally engages the friction disc iii and prevents shaft 3? from rotating with gear 3!. The friction between head 38 and disc 5? is insufiicient, however, to prevent shaft 3'! from being rotated manually by knob 49 in setting the indicator device.

While a specific embodiment of a page-end indi'cator for typewriters has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art.- Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. In a typewriter, a paper-feeding roller provided with a shaft, a housing secured to the frame of the typewriter at one side thereof adjacent said shaft, a worm element journaled in said housing and connected to said shaft; a gear rotatably mounted in said housing and meshing with said worm element, a disc secured axially to said gear and extending through a wall of the housing,- said disc being provided with a calibrated scale, a rod element rotatably carried in said housing and extending rotatably through the center of said gear and said disc, a pointer carried by said rod element extending adjacent said scale; and interengaging friction means carried by said rod element andsaid housing normally holding said rod element against rotation with-respect to the housing. a

2. In a typewriter, a paper-feeding; roller pro- A coiled spring 55 vided with a shaft, a housing secured to the frame of the typewriter at one side thereof adjacent said shaft, a worm element journaled in said housing and connected to said shaft, a gear rotatably mounted in said housing and meshing with said worm element, a disc secured axially to said gear and extending through a wall of the housing, said disc being provided with a calibrated scale, a rod element rotatably carried in said housing and extending rotatably through the center of said gear and said disc, a pointer carried by said rod element extending adjacent said scale, inter engaging friction means carried by said rod element and said housing normally holding said rod element against rotation with respect to the housing, a peripherally-notched drum secured axially to said gear, a projection carried by said rod element engaging the rim of said drum, spring means biasing the rod element axially in a direction to urge the projection into the notch of the drum, and audible signal means operated in response to the entry of said projection in the notch.

3. In a typewriter, a paper-feeding roller provided with a shaft, a housing secured to the frame of the typewriter at one side thereof adjacent said shaft, a member rotatably mounted insaid housing, means coupling said member to the typewriter shaft, a disc secured axially to said member and extending through a wall of the housing, said disc being provided with acalibrated scale, a rod element rotatably carried in said housing and extending rotatably through said member and said disc, a pointer carried by said rod element extending adjacent said scale, and interengaging friction means carried by said rod element and said housing normally holding said rod element against rotation with respect to the housing.

i. In a typewriter, a paper-feeding roller pro vided with a shaft, a housing secured to the frame of the typewriter atone side'thereof adja cent said shaft, a member rotatably mounted in said housing, means coupling said member to the typewriter's'haft, a disc secured'axially to said member and extending through a wall of the housing, said disc being provided with a cali brated scale, a rod element rotatably carried ini said housing and extending rotatably'throug-li the GEORGE G. KNIERIEM, JR} REFERENCES CIT-ED The following references are of record in the file of this patent 1 NITED STATES PATENTS"