US2675111A - Visible indicator for concealed typewriter margin stops - Google Patents

Description

April 3, 1954 E. H. SARGATZ 2,675,111

VISIBLE INDICATOR FOR CONCEALED 'I'YPEWRITER MARGIN STOPS Filed Jan. 12, 1952 "Km-i "in I(aItIIlll/I/IiiIZIIIIIIIII/ilillllllllllliiilliifiill"app.

IN VEN TOR.

EARL H. SARGATZ "gamut spa.

ATTORNEY.

Patented Apr. 13, 1954 VISIBLE INDICATOR FOR CONCEALED TYPEWRITER MARGI N STOPS Earl H. Sargatz, Stamford, 001111., assignor to Remington Band 1110., New York, N. Y., acorporation of Delaware Application January 12, 1952, Serial No. 266,143

This invention relates to an improved indicator for visibly determining the set positions of concealed margin stops of the kind. used upon typewriters or like business machines to arrest or limit the paper carriage movements in letterspacing or return directions.

The recent trend in the manufacture of modern typewriters, and other business machines, has been toward key-set margin stops rather than stops set by direct manipulation. This has eliminated the necessity of direct access to the stops by the operaton'and as a result, margin stops on -modern machines are now no longer accessible and are completely concealed from the operators view which results in certain disadvantages. For example, when an operator desires to know the exact positions to which the concealed margin stops are set, it is necessary to shift the paper carriage until its movement is arrestedby engagement of the stops with the conventional center post, and then only by a comparison-of the carriage scale relative to the printing zone. Such procedure is not only inconvenient but consumes an unwarranted amount of the operators time.

The present invention therefore contemplates the provision of newand novel means for visibly determining the locations or set positions of concealed margin stops.

More specifically, the invention contemplates the provision of margin stop indicating elements that are visible through a slot in the carriage paper table and moved through magnetic attraction in accordance with movements imparted to the margin stops; and mechanism of the character referred to which is of simple construction,

automatic in its operation, readily installed upon existingbusiness machines and certain in its action in correctly indicating the set positions or locations of concealed margin stops.

Other objects and advantages of the invention will be'pointed out inrthe following description and claims, and illustrated in the accompanying drawing, which discloses, by way of example only,

the principle of the invention and the best mode,

which has been contemplated, of applying that principle,

in the drawing:

Fig. 1 is a fragmentary front perspective view of a typewriter embodying the present invention.

Fig. 2 is a detail view of the margin stop indicator elements and their supporting tube which is shown in longitudinal section.

Fig. 3 is a transverse vertical sectional view of the typewriter carriage taken along the line 3--3 iii! typewriter paper carriage.

table H, as clearly illustrated in Fig. .3.

indicator elements, such as balls 23 formed of plugs 23. from contacting one another by a sliding sepaof Fig. 1 and showing only the parts immediately concerned with the present invention, and,

Fig. 4 is a fragmentary rear elevational view partly in section along the line 4-4 of Fig. 3 to illustrate the indicator magnet and its supporting arm for the left-hand selectively settablle margin stop.

The invention, as illustrated, is embodied in 2. Remington typewriter and the drawing shows only such conventional parts of the typewriter as are deemed necessary to make clear the manner of applying the margin stop indicators to typewriters generally.

Referring now to Fig. 1 of the drawing, reference numeral 10 indicates a typewriter and I I the The paper carriage includes end plates I2 rigidly supported inspaced relation relative to one another by rail l3 and cross bar Hi. The bar 14 is attached. to end plates H by screws Ida and the rail 13 is attached to said plates by screws l3a. A paper trough l5,

suitably supported by the carriage extends under and upwardly to the rear of platen It as clearly illustrated in the sectional View Fig. 3. .All parts thus far described may be of any well known or 1 conventional constrution, as they form no part of the instant invention.

Right and left-handmargin stops l8 (Figs. 3

J and 4) are slidably mounted upon the conventional toothed supporting rack l9 and are selec- 1 tively positioned along said rack in the usual manner by a keyboard control key not shown. A

one-piece paper table, l1, fastened to the end i plates I2, completely conceals the margin stops l 8 as will be apparent from a study of Figs. 1 and 3. The visible indicator for the concealed margin stops will now be described in detail.

Transparent tube 21!, attached to the underside of paper table 11 by suitablemeans such as straps 2 I, projects througha longitudinal slot 22 in paper Two magnetic material and preferably colored for contrast against the paper table, are confined for longitudinal movement within tube 20 by end The indicator elements are prevented rator or insulator 28 formed. of non-magnetic material for reasons presently disclosed.

Right and left-hand margin stops iii are each provided with an upwardly and forwardly projecting arm 25, and each arm supports a magnet 25 in close proximity to tube 20. Therefore, the construction is such that any movement imparted to the stops it, when changing their positions upon the toothed rack l9, causes the balls or indicators 23, confined within tube 20, to accurately follow the stops entirely through magnetic attraction of magnets 25. Thus, the positions of the concealed stops upon the toothed rack beneath the paper table can be visibly determined by merely observing the locations of the colored-indicator elements 23 relative to the scale 21. As shown in Fig. 1 this 7 scale may be directly imprinted upon the paper The circumference of cylindrical separatorlaiisalso made slightly smaller than the inside, diameter of tube 20 so that it too is permitted to slide freely Within said tube.- The purpose of separator 28 is to preclude any possibility of balls 23 becoming magnetically attracted to the same magnet, or to each other, when margin stops [8 are shifted or moved into closeproximity tc-one another. I

From the above detailed description, taken in connection with the drawing, it is believed that operation of th visible indicator for concealed V typewriter margin stops will now be apparent.

For example, by referencetc Fig. 1 it will be observed that left-hand margin stop l8 has been set at'25' and that right-hand margin stop I8'has been set at 9 2. This can be visibly determined by merely glancing at the positions or locations 01 .the indicator elements or balls 23 relative to the scale 21 even though th margin stops 18 are concealed from view by the paper table 11. It will be further noted that the only connection between therballs 23 and the concealed margin stops [8 is through the magnetic attraction existing between the balls and magnets 25, and since the balls are free totravel longitudinally within tube ZB they-Will accurately follow any and all movement that is-imparted te -their respective margin stops along toothed rack 19.

Although but one particular embodiment of the invention has been shown and described, it will be apparent tothose skilled in the typewriter art that numerous variations and modifications may-be made in the particular construction with out departing from the underlying principles-of the "invention. It is therefor desired, by the following claims, to include within the scope of the invention, all such variations and modifications whereby substantially the results of the invention may be obtained by the use of substantially the same or equivalent means.

The invention claimed is: V

1. In a typewriter or like machine wherein the paper carriage movements ar limited in letterspacing and return directions by key-set margin stops that are concealed from view, apparatus for visibly indicating the location of such concealed stops comprising, magnetic means mounted for movement with each of said stops; a paper table having a slot-like aperture extending longitudinally thereof; a-scale located adjacent said aperture; and indicating elements visible through said slot and movable longitudinally of said paper tahis in response tomagnetic attraction of their as- ,sociated magnetic means when said stops are moved.

2. In a typewriter or like machine wherein the paper carriage movements are limited in letterspacing and return directions by adjustable margin stops that are concealed from view and inaccessible for direct manual manipulation, apparatus for visibly indicating the set positions of said stops comprising, magnetic means carried by and movable with each of said stops; a paper table mounted on the carriage and provided with a slotlike aperture extending longitudinally. thereof; scale graduations on said table adjacent said aperture; and indicating elements co-operable with said scale, visible through said aperture, and. adapted to move in unison with their respective stops through magnetic attraction of said magnetic means.

3. In a structure for visibly indicating the set positions. of concealed margin stops used on typewriters or like machines, the combination comprising a carriage; a paper table supported by the carriage and having a slot-like aperture extending'longitudinally thereof; a toothed supporting rack mounted within said carriag and beneath said 7 table; a selectively settable margin stop mounted for sliding movement along said rack; magnetic means carried by andmovable with-said stop; scal graduations on said table adjacent said aperture; and an indicator element visible through said aperture and adapted to follow the movement of said stop through magnetic attraction. of said magnetic means.

4. In a typewriter. or like machine in which the movements of the paper carriag are limited by key-set margin stops that are concealed froman operators view, apparatus for visibly indicating the locations of said stop's'comprising, in-combination, a permanent magnet carriedby and movable with each stop; a paper table having a slot-like aperture extending longitudinallythereof; scale graduations on said table adjacent said aperture; a transparent tube mounted beneath said-table and partially projecting through said aperture; magnetic, indicator elements freely movable within said tube and visible through said aperture; and a nonmagnetic separator slidable within said tube and disposed between said indicator elements characterizedby the fact that said indicator elements are caused to move in unison withtheir respective stops through magnetic at traction of their respective magnets.

'5. In a typewriter or likebusiness machine'of the type having right and left-hand margin stops concealed from View beneath the paper table, apparatus for visibly indicating theexact positions of said concealed stops comprising, a transparent tube attached to saidpaper table and visible from the front of saidmachine; a pair'o-f indicating elements formed of magneti'cmater-ia1 and freely movable" within said tube; a separator of nonmagnetic material mounted for sliding movement within said'tube and disposed between said-indicating elements to prevent them from contacting one another;means to retain said indicating elements and separator within said tube; a magnet carried by and movable with said right-hand margin stop to effectively move its associated indicating element throughmagnetic attraction; and a second magnetcarried by and movable with said left-hand margin stop to effectively move its associated indicating element through magnetic attraction.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,2331572 Atkins Mar. 4, 1941 2,580,211, ,Aeb'i Dec. 25, 1-951

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