US1723262A

US1723262A - Magnifying-glass support

Info

Publication number: US1723262A
Application number: US258512A
Authority: US
Inventors: Harry A Walsh
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-03-02
Filing date: 1928-03-02
Publication date: 1929-08-06
Anticipated expiration: 1946-08-06

Description

H. A. WAL1H 1,723,262

MAGNIFYING GLASS SUPPORT Filed March 2, 1928 Patented Aug. 6, 1929.

UNITED STATES HARRY A. WALSH, OF

WASHINGTON, DISTRICT OF COLUMBIA.

MAGNII'YING-GLASS SUPPORT.

Application filed March 2, 1928. Serial No. 258,512.

The present invention consists of a magnifying glass support, especially adapted for retaining the glass a predetermined pos1- tion over a drafting sheet while a drawing is 6 being made thereon. a

In certain kinds of drafting, especially topographical drafting, it is necessary to employ the use of a magnifying glass in order to visualize the locus'or point at which the pencil, pen or other drafting element is being used. This requires the draftsman to hold the glass in a superposed position above the drafting sheet and further requires him to hold, with the same hand, means to anchor the sheet on the drafting board or table, in proximity to the point where the pen or penoil is being used. Manifestly the hand which supports the glass and anchoring elements becomes cramped and the efliciency of the draftsman is thereby lessened. It is consequently an object of the present invention to provide suitable mechanical means for supporting the glass in a predetermined position in addition to anchoring the sheet on the drafting board at a point being visualized through the glass.

Another object of the invention is to pro vide a magnifying glass support which may be conveniently manipulated by the draftsman and which is so constructed that the glass may be adjusted with facility at any desired position to suit the convenience of the drafts man.

Other objects of the invention will be apparent from the following description of the present preferred forms of the invention, taken in connection with the accompanying drawings, wherein Figure 1 is a side elevational View of a magnifying glass supporting structure constructed in accordance with the present invention.

Figure 2 is a top plan view thereof, a portion of which is broken away to disclose the manner of engaging the glass with its standard'.

Figure 3 is a horizontal sectional view taken on the line 33 of Figure 1, looking in the direction of the arrows; and

Figure 4 is a detail fragmentary side elevational view of the support and glass showing a modified form of the invention.

The device of the present invention embodies a hand-grip 5, which serves as a supportin" base, in a manner hereinafter describ'ef, and is provided with a series of finger receiving recesses or depressions 6. The hand grip is extended longitudinall and the bottom thereof is rounded as in icated at 7, to permit the support-in structure to be moved thereon as an axis wit out removing the grip from the drawin sheet. The upper end of the handle may he of arcuate configuration and is provided with a recess which receives one end of a bar 8. The opposite end of the bar extends downwardly in parallelism to the hand-grip 5 and terminates approximately midway the ends of the latter, the lower terminus of the bar being extended at right angles to provide a supporting shelf 9 which has a supporting standard 10 upstanding thereon. The standard present instance to be of cylindrical confi uration, although it is to be understood that this may be of any other configuration to satisfy the caprice of a manufacturer or to better conform to different working conditions. The free end of the shelf 9 is bifurcated, as indicated at 11, and is adapted to receive, between the branches of the bifurcation, one end of a drawing sheet anchor 12. In the present instance, the anchor 12 is shown to consist of a finger, the free end of which may terminate in a single prong designated 13 and shown in Figure 3, or may terminate in a claw end designated 14 and indicated by dotted lines in Figure 2. When the anchoring finger is superimposed on the drawing sheet, it will be noted, upon reference to Figurel of the drawing, that the hand-grip 7 is in a canted position which permits the hand to lean thereagainst in a convenient position. When in this position, the standard 10 is in a vertical plane. The anchoring finger 12 is secured from displacement by a set screw 15, the latter also permitting adjustment of the finger, if such adjustment should at any time be desirable.

Slidably mounted upon the supporting standard 10 is a magnifying glass supportin sleeve 16, which is provided with a spherica enlargement 17 having a threaded bore formed therein which communicates with the bore .of the sleeve. The threaded bore is adapted for the reception of a complemental shank formed on a knurled screw 18. The free end of the shank screw is adapted for impingement against the standard 10 in order'to hold the sleeve 16 in any desired position on the shank. A sphe ical enlar ement 19 is formed on the sleeve 16 at a point diametrically opposite to the enlargement 17 10 is shown in the and carries a socket 20 in which a magnifyin glass 21 is movably and detachably mounted: In the form of invention shown in Figure 2 the glass may be tilted as indicated by the dotted lines in Figure 1. It may be desirable under certain conditions to employ a universal adjustment of the glass and consequently, in Figure 4 I have shown'a slightly modified form of the invention, which consists of a universal joint 22 which is formed by providing a socket 23 on the enlargement 19. The socket receives a ball 24 which is formed on one of a shank 25 which issues from the outer periphery of the glass 21. This form of the invention permits a universal adjustment of the glass in an obvious manner.

In use of this device the hand-grip or base 5 is mounted on the drafting sheet shown in Figure 1 of the drawing in which position the anchoring finger is positioned under the glass, so as to be discernible through the latter. The free end of: the anchoring finger is positioned atthe point on the sheet where draftin is to he done so that the point visualized t rough the glass is magnified and in addition, the drafting sheet is held in a fixed position on the drafting board or table. lit is essential to magnify the working locus or point on the sheet in certain kinds of drafting, especially in map drawing, and since these sheets are relatively large, it is also necessary that they be retained in a fiat positime on the table or heard at the point where the draitsman is working, and it has heen found that the present device efiectively functions to produce these results.

ll have found that the handle or base 5 may he made of wood and the other parts at the device constructed or" metal in order to roduce an effective supporting structure. am aware, however, that other materials may be used and that various other changes may he made in the device especially in the details of construction, proportion and arrangement of parts, within the scope of the claims hereto appended.

What is claimed is 1. A magnifying glass su port including a hand grip having an extension for contacting with a sheet of paper at one point and provided with a aper anchoring finger adapted to contact wit the paper at another point, in combination with a ma ifying glass associated with said grip an finger.

2. A magnifying glass support including a hand grip having an extended portion for contacting with a sheet of paper atone oint and provided with a paper anchoring nger adapted to contact with the aper at another point, in combination witi a magnifying glass adjustably associated with said grip and finger.

3. A magnifying glass support including a hand grip having an extended portion for contacting with a sheet of paper at one point and provided with a paper anchoring finger adapted to contact with the paper at another point, in combination with a standard normal to a line joining said points, and a magnifying glass adjustable axially 0; the standard.

i. A magnifying glass support consisting of a hand grip, a bar associated therewith and terminating in a shelf-like projection, 21 depending sheet-anchoring finger and an upstanding standard united to said projection, together with a magnifying glass mounted on said standard.

5. A magnityin iass support consisting of a hand grip, a down-curving bar associated therewith and terminating in a shelflike projection, a depending sheet-anchoring finger and an upstanding standard united to said projection together with a magnifying glass mounted on said standard and adjustable axially thereof,

6. in combination with a magnifying lass equipped with a shank having a spherica enlargement on its free end, a supporting structure "for said glass includir a hand grip and a paper anchoring finger, a standard associated therewith, a sleeve adjustably mounted on the standard and equipped with socket for the reception of said spherical eniar ement to provide a universal connection etween the glass and sleeve.

nannr A. WALSH.