|Publication number||US1612693 A|
|Publication date||Dec 28, 1926|
|Filing date||Oct 25, 1924|
|Priority date||Oct 25, 1924|
|Publication number||US 1612693 A, US 1612693A, US-A-1612693, US1612693 A, US1612693A|
|Original Assignee||Bausch & Lomb|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (4), Classifications (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Dec. 28 1926. 7 1,612,693
E. BAuscH MAGNIFYING GLAS S Filed Oct. 25, 1924 A v 1 IN VEN TOR. zzza/m-dfiflwciz fi w bArroRNEy I Patented Dec. 28, 1926.
UNITED STATES PATENT OFFIQE.
EDWARD BAUSOH, OF ROCHESTER, NEW YORK, ASSIGNOR TO BAUSCH & LOMB OPTI- OAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK,
Application filed October 25, 1924. Serial No. 745,888.
This invention relates to magnifying glasses, and more particularly to the pocket variety comprising lens means mounted on adjustably connected parts adapted to be arranged for supporting the lens in properly focussed relation to the object to be viewed and also for folding compactly into asmall space when not in use, the chief object of the invention being to provide an improved character of construction for a magnifying glass of this type by which it may be economic-ally formed of relatively thin sheet metal with the parts arranged to fold compactly together and in such a manner as to fully protect the lens.
To these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.
In the drawings:
Figure 1 is a top plan view of a magnifying glass embodying the present invention with the parts arranged as in use.
Figure 2 is a side elevation of the same as viewed from the left in Figure 1.
Figure 3 is a sectional elevation on the line 3 3 in Figure 1.
Figure 4 is a view similar to Figure 3 but showing the parts in elevation on a reduced scale.
Figure 5 is a side elevation but showing the parts in folded relation.
Figure 6 is a similar View enlarged and in section.
Figure 7 is an enlarged detailed sectional view on the line 77= in Figure 4, showing the pivot construction, and
Figure 8 is a perspective detailed view of a part of the same.
Similar reference numerals throughout the several views indicate the same parts.
The invention provides a magnifying glass embodying a form of construction for the supporting frame capable of being struck up in asimple and economical manner from relatively thin sheet metal to afford at the same time a substantial degree of strength and stiffness and provide for compact folding of the frame when not in use with full protection for the lens surfaces. This frame consists, generally speaking, of three parts, namely, a base plate 10, a supporting plate 11 and a lens plate 12 pivotally connected together by advantageously simple means as hereafter more fully described.
The base plate is of generally rectangular shape having the marginal portions at oppo site sides thereof turned angularly upward to provide stiffening flanges 18 which also serve to provide the means for pivotal connection with the supporting plate 11' as hereafter described. The base plate is also preferably formed at its central portion with an aperture 14-. for viewing the object to be examined, the present glass being particularly adapted for testing the weave of fabrics for which purpose aperture 1% is given predetermined dimensions to disclose a unit area of fabric the number of threads in which may be readily counted when viewed through the lens.
The supporting plate 11 has the marginal portions at opposite sides thereof turned angularly toward the rear to provide stiffening flanges 15 each of which is extended at its ends as at 16 and 17 respectively for pivotal connection with the base and lens plates at l'r' -and 17 respectively by means described hereafter. As shown, the flange extensions 16 embrace the flanges 13 so that the base plate may be swung from the sup porting position shown in Figure 3 to the folded position shown in Figure 6 in which it is nested within the supporting plates 11.
The lens plate 12 has marginal portions at opposite sides thereof turned angularly downward to provide in a similar manner stiffening flanges 18 extended one end as at 19 for pivotal connection with the extended flange portions 17 of the supporting plate 11. The lens plate is formed with an opening through which is inserted one end of a sheet metal thimble 20 having a shoulder 21 seated on the plate 12 adjacent the opening, the end of the thimble being rolled over as shown at 22' to secure the thimble in lace. The lens 23 is seated at its periphery on the shoulder portion of the thimble the upper end 24 of which is rolled over against a washer 25 hearing yieldingly on the upper surface of the lens to secure it in its mounting. The lens plate may be swung from the position of use shown in Figure to the folded position shown in Figure 6 in which the lens is nested within the flanges 13 of the base plate and protected on one side by the latter and the supporting plate 11. In this position the lens lies inwardly of the flange of its supporting plate 12 and is protected on the other side by the latter and flanges 18 thereof, the parts occupying the comp-act parallel relation shown in Figures 5 and 6.
In addition to the flange parts described above there is preferably provided, also, a cover plate 26 having angular-1y turned flanges 27 at opposite sides thereof which latter are received at one end and pivotally connected at 28 as hereafter described to the flanges 18 of the lens plate at a point adjacent the supporting plate 11 as shown. in the position or use shown in Figure 3, the lower end of the cover plate rests upon the flanges 13 and serves as a strut to additionally support the lens plate. in folded position the cover plate 26 lies over the outer surface of the lens, as shown in Figures 5 and 6, to further prot ct the latter, the cover plate in this position being CO1 ipactly received within the lianges of the lens plate.
An advantageous term of pivotal connection is provided for the several plates by recessing or punching out a portion of a flange or one'as for example the flange e2;- tension 19 of the lens plate, l igures l and 7, and pressing out a projection or trunnion 29 in the cooperating flange extension 17 ot the supporting plate, by means oi? which the connection is formed entirely from the material or the plates themselves and in such a manner that the cooperating members may be sprung into place in assembly by a slight flexing or the plates.
\Vhen in position for use, the body of the supporting plate ll rests at its lower edge on the flanges l3 oithe base plate by means of which the plate 11 is rigidly supported in vertical position. Similarly the body of the lens plate 12 rests upon the upper edge of the body or" the supporting plate 11 and is also supported by the cover plate as already described. The latter may if desired have its surface silvered or otherwise prepared to aliord a reflecting surface to assist in illuminating the object under examination. From such position in use the parts may be com pactly tolded as described by first swinging the base plate against the back of the supporting plate and then the lens plate against the base plate, with the cover plate against the lens which is thus completely enclosed and protected. The frame parts are all so constructed that they may be readily and economically formed from relatively light sheet metal which is rendered sutliciently still for all practical purposes however by the reinforcing flanges which latter provide also for the advantageous pivotal connections described above.
I claim as my invention:
1. A magnifying glass comprising a base plate, a supporting plate and a lens plate each formed of relatively thin sheet metal with angularly turned flanges at opposite sides thereoi i'or stillening the same, means pivotally connecting the flanges of said base and lens plate to the flanges of said supporting plate and arranged to provide for the folding of said plates into compact parallel relation, lens means mounted in said lens plate and a plate pivot-ally connected with said lens plate for movement to an extended position in supporting engagement with said base plate and also to a folded position to cover and protect said lens means.
2. A magnifying glass comprising a base plate, a supporting plate and a lens plate pivotally connected to swing substantially into parallel relation, a lens carried by said lens plate and a cover for the lens carried by one of said plates and movable relative thereto into protecting position with respect to said lens.
A magnifying glass comprising a base plate, a supporting plate and a lens plate pivotally connected to swing substantially into parallel relation. a lens carried by said lens plate and a cover for the lens pivoted upon the lens plate and adapted when the latter is in operating position to engage the base plate to form a brace for the supporting plate.
l. A magnifying glass comprising a base plate, a supporting plate and a lens plate, each having a pair of flanged portions at opposite sides thereof, the flanged portions of the base plate and the flanged portions oi the lens plate being pivotally connected with the flanged portions of the supporting plate to permit said plates to swing substantially into parallel relation, lens means carried by said lens plate and a member pivoted upon one of said plates to form a cover for the lens means.
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