US1149383A

US1149383A - Movable-reading-lens holder.

Info

Publication number: US1149383A
Application number: US81967014A
Authority: US
Inventors: Carl A Meilicke
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-02-19
Filing date: 1914-02-19
Publication date: 1915-08-10
Anticipated expiration: 1932-08-10

Description

C. A. MEILICKEI MOVABLE READING LENS HOLDER.

APPLICATION FILED FEB-19; I914.

Patented Aug. 10, 1915.

2 SHEETS-SHEET I.

c. A. MEILICKE.

MOVABLE READING LENS HOLDER.

APPLICATION FILED FEB. 19. I914- Patented Aug. 10 1915.

2 SHEETS-SHEET 2.

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. its reading position.

UNITED STATES PATENT clarion.

CARL A. MEILICKE, OF CHICAGO, ILLINOIS.

MOVABLE-READING-LENS HOLDER.

Specification of Letters Patent.

Patented Aug. 10,1915.

Application filed February 19, 1914. Seria. No. 819,670.

lating machines and the like,) wherein the reading lens is mounted for pivotal movement in one direction to place it in or remove it from position for use, and is slidingly adjustable in another direction to vary A further ob'ect of my invention "is to provide a reading glass mounting and setting wherein "the lens, relatively large and shaped for effective magnifying qualities covering a relatively large reading field, may be adequately protected so that it is not liable to fracture or damage due to its positioning movements, or to expansion and contraction. I

Other objects of my invention will be ap-. parent to those skilled in the art from the following description taken in conjunction with the accompanying drawings in which Figure 1 is a front elevation of a calculating machine equipped with my invention;

.Fig. 2 is a side elevation with parts broken away; Fig. 3 is an enlarged section on line 3--3 of Fig. 1.- Fig. 4: is an enlarged sectionaldetail of the rollerdrnd spring mechanism; Fig. 5 is an enlarged detail of a lens retaining clip and contiguous parts; Fig. 6 is an end elevation, ,with parts broken away, showing a friction grip mechanism associated with the reading glass rock shaft; Fig.

gagement of the arms with the flat-faced or polygonal bar being preferably relatively loose, so as to allow some pivotal lost motion between the lens carrying frame and the slide bar. The slide bar is mounted" to be rocked in end bearings, to enable the lens carrying frame to be raised and lowered, out of. and into the reading plane, and the sliding movement of the frame along the slidebar enables it to be positioned in the precise reading position desired.

When in lowered or operative position a portion of the lens holding frame relatively. remote from the slide bar has a gravity-' maintained bearing upon a slide way; and such cooperative relation is effected between the means employed for restricting the pivotal throw of the flat-faced slide bar 13 andthe bearing members remote from the pivotal axis of said rod, that the lens frame may be given the capacity for freely sliding upon the bar 13 without cramping or binding due to engagement of arms 12 with the bar 13. Thus in the particular construction shown, the lens frame 11 is provided at its lower end with a boss 15 in which is mounted the guide roller structure 16 providing an antifriction roller 17 for coaction with a slide way 18 suitably mounted on the frame of the machine. The boss 15 is preferably bored and counter-bored toprovide a recess 19-19 of two diameters, and the roller 17 is mounted in the head 20 from which extends the stem 21'2l of two diameters to I correspond with the diameters of the counter-bore. A spring 22 interposed between the base of the bore of larger diameter and the base of the larger diameter of the stem presses the roller-head outward, giving the roller-head a resilient capacity for reciprocation limited, in the specific construction shown, by the throw of the slot 23 in the stem relative to a screw 24-mounted on the boss, said screw and slot also preventing the roller-carrying head from ro-v tating. The position of the slide-way 18 on the machine frame is such that when the lens frame is brought to operative or reading position gravity tends to maintain the contact between the roller 17 and its slideway.

The rotative or pivotal movements of the slide bar 13 are opposed by a friction de- 1 vice, preferably adjustable as the frictional grip. Thus, in the particular construction shown, the slide bar 13 has cylindrical end portions 13 (Fig. 7) engaged in brackets 26,

of screws 27 in the slots 28 in the bases of the brackets 26. Beyond one of said brackets 26 a bearing part 13 of the bar has mounted thereon a friction head 30, preferably provided with a leather or other frictional surface covering 31 (Figs. 6 and 7). A brake band or split ring 32 encompasses the friction disk and is adjustable as to tensionby asuitable screw 33 takin through its two split limbs. A pin 35 pro]ects from the brake band and engages in the bracket 26, so that the band exerts a constant resistance to pivotal movement of the slide bar 13. A pin 36 carried by the disk 30 is arranged to coact with the upper edge of the bracket 26 toact as a stop against overthrowing of the lens-carrying frame when the latter is raised to out-of-use position.

The particular machine with which I have shown the parts employed for embodiment of my present invention to be connected, is a calculating machine, and I will hereindescribe the use of my invention with respect to that particular application thereof, although it will be understood that the present invention is not limited to the character of the machine to which the reading glass is applied, and thatmany changes might be made in the specific embodiment thereof within the spirit of the present invention and the scope of the appended claims for utilization of the invention in connection with other machines; By reference to some of the characteristics of the calculating machine, however, some of the advantages of my present invention will be accentuated.

The. calculating machine shown provides a frame or casing 40 carrying the lensmountings and having a sight opening protected by a glass 41 set in a rim frame of which the slide way 18 may form a part. Beneath the reading glass there is displayed a fixed scale or index 42, having a reading line opening 43 through which is displayed a single line of figures, which is one of the many horizontal lines carried by a rotatable chart-drum 44. It is for easy reading of the indicia upon the fixed and movable charts or scales that the magnifying lens is primarily provided as the figures are necessarily small.

It will be apparent that unimpeded dropping of the relatively heavy lensin its frame so that its roller 17 might forcibly strike the slideway 18 constituting part of the retaining frame for the glass 41 would be very apt to break the glass 41 and possibly the reading glass, and to bend, dent or improperly jar the machine-casing, and. for these reasons, among others, the frictional restraint is preferably always imposed upon the pivotal movements of the slide bar 13.

Furthermore as it is decidedly advantageous to have the magnifying lens large enough to cover a considerable longitudinal area of and for these reasons, among others, I provide a special lens mountingwhich I have found to be very advantageous, particularly with respect to the relatively large and thick lens employed.

The lens is preferably of somewhat ovate, plano-convex form having a flat bottom chord as at 10'.

The lens frame 11 isconstructed to provide at 11 a square bearing for the squared, and relatively thick, straight edge 10 of the glass, and throughout the balance of its perimeter where it engages the glass, it is preferably beveled or concaved as at 11? (see Fig. 3) to engage smoothly the convex surface of the lens along its border.

Glass retaining clips 11 are secured to the under side of the frame, each clip being preferably made ofspring metal shaped to provide a base 11, secured directly to the metal lens-frame, and a head 11 arched somewhat (see Fig. 3) for engagement at its tip or edge only with the glass, and preferably arranged so that its gripping edge lies beneath the inner perimeter of the lens rim 11. The glass, therefore, has a certain capability of expanding with the shoulder or fiat surface 10 as a base, the beveled or wedgeaction engagement between the convex border of the glass and rim at all other points permitting some come-and-go to which the spring" clips may slightly yield. Such action of course is very slight, but I find that the construction described adequately prevents marginal chipping or checking of the glass under expansion and contraction. Also the support of the glass from below upon the slightly springy clipsgives a slight but effective resiliency to the mount- .ing in the direction of the thickness of the lens, while the securing of the glass against bodily displacement is simply attained.

The operation of the device will be as follows: When the glass is not to be used, it is lifted, the bar 13 turning against the resistance of the friction plate until pin 36 bears onthe top edge of its adjacent bracket 26 as a positive stop. When the glass is re turnedto reading position, it carries with it in rotation the slide-bar 13, and the glass is brought down not only until the antifrictional roller 17 touches the slide way 18, but it is depressed farther, until the boss 15 has traveled downward to the extent permitted by the play of screw 24 in slot 23, against the resistance of spring 22, thereby turning the bar 13 through a slight degree of angular displacement'greater than that to itslposition for use, the apertures in the arm v12 are loosened on the bar 13 due to the slight pivotal lost motion between the arms'and bar, and may slide freely without any clutch action on the bar, the weight of the lens and frame being borne jointlyrby the bar 13 and the slideway 18. It will be observed of course that therange of throw allowed by slot 23,;for over-depression of the .lens frame, must be properly proportioned so that the spring return movement does not reversely bind the arms 12 upon the bar 13, but moves said arms rotarily with respect to the bar only within the slight range of lost motion left between the apertures in said arms 12 and the bar 13. x

I find in practice that the construction above described is of very great advantage, giving to the lens carrier a perfect freedom of movement in sliding which facilitates rapid and accurate manipulation of the lens. The frictional grip. of the brake band on the friction disk is generally best regulated so as to hold the bar 13 against slippage in any pivotal position to which it may be moved, so to avoid any possibility of the lens falling to reading position, however carelessly it may be handled. The lens mounting described may, of course, be varied, according to the requirements of the lens, as may other details of construction, but I have found in commercial construction that the lens holding arrangement herein described, is very satisfactory in its prevention of edge cracking, checking, or breakage of the lens.

The same equipment of bar-,lens frame,

' etc., shown herein as attached to a calculating machine, may be used on other machines, with onlychanges in proportions and incidental details, and the proper parts are of course subject to separate sale as an attachment set for any machine where a horizontally slidable reading lens is desirable.

.Having thus described my invention, what I claim with a view and desire'to secure by Letters Patent is o ,1. The combination'wi'th a body, of separated supports, a slide bar mounted to rock said body paralleling said slide bar, and a.

in said supports, a guide 'way carried by lens frame mounted to rock with and slide on said bar and when in position for use to receive bearing from said slide way,

2. The combination with a body, of separated supports, a slide bar rotatably mountsite side of the lens frame for cooperation with the guide when the lens frame is in position for use.

3. The combination with a body, of separated supports, a slide bar mounted to rock in said supports, a guide way carried by said body paralleling said slide bar, a lens frame mounted to rock with and slide on said bar and when in position for use to receive bearing from said slide way and resilient means to permit movement of said lens frame past its said position of bearing on the slide-way for resilient restoration to thesaid position, thereby to prevent crampbar mounted to rock thereon, a lens frame mounted on said bar with some pivotal lost motion, to rock therewith and to slide thereon; a slide way member for affording hearing to the lens frame remote from the slide bar, resilient means to permit movement of the lens frame beyond the normal position defined by said slide bar for spring return thereby to prevent cramping of the lens frame on the slide bar and friction means gpposing rocking movements of the slide 5. The combination of a body providing separated supports and a slide way remote therefrom, a flat-faced slide bar mounted to rock in said supports, a lens frame mounted on said'bar with some pivotal lost motion to rock therewith and to slide thereon, and spanning the space between the slide bar and the slide way, and a resilient bearing member for coaction with said slide way carried by said lens frame.

6. The combination of a body providing separated supports and a slide way remote therefrom, a flat-faced slide bar mounted to rock in said supports, a lens frame mounted on said bar with some pivotal lost motion to rock therewith and to slide thereon, and spanning the space between the slide bar and the slide way, a resilient bearing memher for coaction with said slide way carried by said 'lensframe, and means for opposing rocking movements of said slide bar.

7. In a machine of the character described the combination of a body providing a slide w'ay, supports spaced apart therefrom and from each other, a flat faced slide bar mounted in said supports to rock therein and arranged'paralle'l to the slide way, a lens frame mounted on said bar to rock therewith and to slide thereon, and spanning the space to said slide way, a friction means .for opposing rocking movements of said slide bar, and an antifrictional roller for bearing on said slide way, carried by said lens frame and yieldably mounted thereon for the purpose described:-

8. The combination of .a lens having a Ill) tions thereof arranged to interfit With the convex surface of the lens and spring clips 15 holding said lens With its convex surface against said curved portions of the frame and its chord portion upon the flat part of the frame.

In testimony whereof I hereunto set my 20 hand in the presence of tWo Witnesses.

CARL A. MEILIGKE.

In the presence of STANLEY W. COOK, MARY F. ALLEN.