US814194A - Eyeglass-bridge. - Google Patents

Description

PATENTEB MAR. 6, 1906.

W. H. ELY. EYEGLASS BRIDGE. APPLIGATIUN FILED DE0.23.1904.

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UNITED STATES PATENT OFFICE.

EYEeLAss-BHIDG'E.

. Specification of Letters Patent.

Patented March 6, 190B.

Application filed December 23. 1.904. Serial No. 288,08@

'plane of the tops of the studs, to have the spring of the arch low, to have the arch con- .orin to the lines ofthe nose, and to have the crest ofthe arch close to' the skin,so that the bridge will be inconspicuous and apparently specially fitted to the nose of the wearer.

It is essential that bridges of this nature have sufficient resilience to permit the guards come useless.

to be separated widely enough to allow them to be easily applied to the nose without dan gr`of breaking the bridge or so strainin the metal that it will lose its elasticity an be- In the prior structures in which attempts have been made to` keep the bridge low to the spring of the arch'V .d to eflect a close fit either there Vis not enough elasticity` orlin.- order to provide suiiicient resilience,

strength, and security7 various unsightly and a O impracticable coils, ops, and bends have n employed which, owing to kconstant b y oaning in use,soon become so stranieri that bridge thatV may be made of the ordinary materia 'commer-ce, whichwill set low, have little arch i 4o and conform closely to the nose, and yet wil in lace.

e metal breaks at the bends or loses its elasticity. l i

The cject of this invention is to produce a s and used with the common studs of have abundant strength, much elastic1ty, and will open in an approved mannerinorder that the guards may e suliciently separated to allow easy application to the nose and the lenses surely returned to their ngormal ositions in iront of the Veyes and beiirmly eld o this end the invention resides in a bridge formed of a strip of at or oval metal having an arch springing at any angle with compound coils 1n front of the ends ofthe arch, all portions of which are in substantially the same plane, and short Stud ends that are torsional] twisted inthe coils so as to extend downwar 1y from theinside near the lcenter of the coils.

. vertical p ane o the lenses.

can be made in this thin strip of hard sprin Figure 1 ci the accompanying drawings shows an elevation of a .bridge that embodies the invention attached Ato a pair of common vertically-o iening studs. Fig. .2 shows a front view o the bridge. Fig. 3 shows s plan ol the bridge. Fig. 4 shows a section on the lane indicated bythe line .4 4 on Fig. 3, and

ig. 5 shows a section on the plane indicated by the line'' on Fig. 3.

This brid e may be formed oli-a narrow thin strip o gold, steel, nickel,`or the other metalscomnionlyused. The arch 6 is curved so as to sprin outwardly and upwardly but ver little. t is preferred to only have it sprlng Vjust sufficiently to clear the nose, with its Wider faces extending parallel with the line ofthe nose. At each end of the arch the strip is curved to form an outer coil 7' and an i'nner coil l8. All portions of these coils are made in the saine plane and are preferably in the plane of the spring of the arch, so that -When the bridge is looked at from directly in front, as shown in Fig. 2, it ap ears as a narrow strip, the coils not being istlnguishable 'from thearch.

Eachend 9 of the stri is given a torsional twist 10 in the inner coi so that the end will project downwardly With its wider faces extendin aty right angles to the -vertical lane of the enses in order that it maybe t ust' into'and secured in the ordinary verticallyopeni stud 11 oi commerce. The character of t e torsional twist iven to the ends' determines the angle at vrV ich the arch will project u ward] ,l and outwardly from the A short bendl metal if it is made torsionally. A short permits small coils, and by employin two the coils may be made close, and yet su cient elasticity will be provided toV enable thelenses to be Widely o cned for separating the -arde Without brea ingvthe metal where it 1s bent or straining the coils beyond the limit of elasticit With the compound coils the opening o the lenses and s reading of the guards causes the coils to wind upon-themselves, and thus check any tendency to over strain the coils or the bend, and with the compound coils the torsional twist given to the stud ends may be made entirely within the inner coil, so that it is not visible when looked at from the front and so that the coils may be brought down close to the studs without affecting their elasticity. The use. of compound coils not only permits sniall coils IOO and the making of e close torsional twist for the ends, but also allows the ends to be brought down near the center of the eoils, so that the coils will have suflicient flexibility without interfering with the braces on the studs.

This bridge is low `and een be eheapl made of the common materials. The arch has but little spring, and it conforms to the outline of the nose. This bridge has a great deal of elasticity and strength and allows the V lenses to be opened Widely and fre uently in an approved manner Without anger of straining or breaking where it is bent and twisted and the ends of the bridge are easily adapted to be inserted into any of the com mon forms of studs.

The invention claimed is- -1. An eye lass-bridge formed of a flattened strip o thin spring metal having an interrnediate connecting portion, an outer coil at eaeh end, an inner eoil within eaeh outer coil, said coils lying in the same plane, and the attaching ends torsionally lient and eX- tending downwardly lrorn the inner ends of the inner eoils and with their wider faces extending in planes transversely of the planes ofthe coils.

2. An eye lass-bridge 'formed of a flattened strip o' thin, spring metal having arf areh7 an outer coil at eaeli end ofl the areli, an inner coil within each outer coil, and a tor sionallytwisted stud end extending downwardly from each inner coil, substantially as specifiedY WILLIAM lll ELY.

Witn esses:

RnvILo C. MARKHAM, EDWARD A. TREDWAY

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