US874179A - Optical testing apparatus. - Google Patents

Description

No. 874,179. PATENTED DEG. 17, 1907. J. P. PORTH & E. J. LANGLBY.

OPTICAL TESTING APPARATUS. APPLICATION FILED MAR. 31.1906.

dirai/V511.'

i No.874,179.

UNITED sTA'rEs PATENT. (minou.

IoHN F. FORTH AND EDWARD J. LANG-LEY; oF- sYRAcUsE, NEW YoRK; SAID LANGLEY AssIGNoR To SAID FORTH. j

orrrcAL TESTING nrrnnn'rus.

specificaties of Letters Patent.

Patented Dec; i7, reci'.

To all whom itrrmy concern: i' r y Be it'known thatwe, JoHN F. FORTH and EDWARD J. LANGLEY, both of Syracuse, in thecounty of Onondaga, in the State of New yYork, have invented new and useful Improvements in Optical Testing Apparatus, of l which the following, taken in connection with the accompanying drawings, yis afull,

clear, and exact description. v

This invention relates to certain improvements '1n optical testing instruments in 'which the lens-testing frames are mounted upon a portable verticall adjustable standard having a suitable c -rest to support the head with theeyes in registration with testing operation. The essential pu ose of m invention is to provide an extensib e portab e standard hav- 1n at its u perend a chin-rest and a vertica ly slidable-support for the testin frame.

A further object is to enable the ens-holdthe lenses of the testing-frame during the ing frame to betilted to different anglesto Figs. 2,3 and 4 are section increase the range' of'vision, or rather, to

throw the linev o vision or focal axis up or down as the optician ma desire,

Other more specific objects will be brought out in the following description.

In the drawingsFigure 1 is an"elevation of an optical testing-instrument embodying.

the various features of my invention, portions of the standard. be'

views 4taken res ectively,on llines -2-2, 3-3,l and -4---4, llig. 1. Figi 5 is a lo gitudinal sectional view through a'portiolii ofv the standard showing thevtelesco ing parts, and means for clamping them in t eir adjusted position.

In carrying' out the'objects of this inven- 40. tion, I provi ea pprtablerame or standard,

consistlng of in t s instance, a series of upbular', beingpermanently secured' to a-suitable support' section 1s providedY with a late vU- shape offset -5.-, the upper end-of which'is site upwardl projecting parallel arms -1-7 for receivingya vertically slidableyoke -8 Awhich carnes ythe?lens-supporting` frames,-

broken away'.v

l cured upwardly rejecting boss v-10 Aon the base ,-4- an terminates at its u per end in a split hub -11- having suitab e ears atop os1te sides ofl'thedivision for refceiving a c ampin screw 12-'.

lower end Inserted through the split hub I3- similar to the hub -11- .andis provided with a clamping screw '-14-:for tightening the hub 13 u on the adjacent end of the section -3-. his latter section -3.- Vforming the upper section of the standard hasits lower 'end inserted through the hub--13- and into the tubular section -2 and is clam ed in its adjusted position through the me i`um of the split vhub 13- and its clam ing-screw 111-.' This stand- .4 ard is, there ore, extensible vertically, that is, thetubular section f-2- is adjustable vertically in the section -1, and the section -3-gis adjustable vertically in the section -2-itoenable' the support for the testingyframes to bebrought on a level withthe, eyes of the patient 1nl either a sittingv gr y standing position and -held at such leve tightening the` clamping screws 12 and4 14-, according -to t` e egree of extension reu1red.' he U-shape extension -5- is oset to one side ofthe vertical axis of the standard audits upper arm extends vsome distance beyond the opposite side of said axis, and terminates in an upright tubular elbow l-5--.

4cally and or'this purpose is provided with a depending shank -'15-'seated in the tubud lar elbow 5'- and heldin its" adjusted position by suitable. fastening means, as a'setjustabl 'mounted,V such Imrljusfment effecte by meansoa nut. 1S- screwing 21, vof the U-sha e frar'ne. y This U-shape frame is preferab y arranged in a vertical 10,5 upon the threaded .end of the stud -'-1=7-. and having an annular'groove -19- iny which. is seated a pin -20-1on the hub, as

2G--v receiving a pivotal plane a sufficient distance at the rear of the chin-rest -6 so that when the chin rests upon'the support 6* the eyes will be in close proximity to the lens-supportingi'rames -9-.

The hub 2land its upright arms -7,- are held in an upright position against rotation by means of a key or fin 22,--v which rides in the key-way -23- inthe stud I7-, and it is evident that, by rotating the nut -18-, the huh -2 1 and its arms -7- may be adjusted toward and from the chin-rest -6-*,'although any other means of adjustment may be employed for the same purpose without departing from the spirit of 'my invention.

which is centrally hinge frame-support--28-. Y f

The lens supporting frames S3-'- are mounted as usual upon right and left-hand screws -3()- and a uide-rod -31, both of which are mounte in suitable apertures, one above the other in the lower end of the rocking support *-28 below the pivot -27, the screws -30- being provided with hand-pieces 32- b which they may be rotated to adjust the ens frames 9 to and from each other. The nose-piece -33- is vertically adjustable in a suitable clamp -34- on the lower end of the rocking support 2S- andis held in its adjustable position by a clamping screw 354, as best seen in Fig. 3. The rocking fin er -36- is pivoted at -37- to the yo e -8- some distance above the pivot -27- and projects through ing an upright standard and a supporting an aperture in the upper end ofthe rockarm -28- which is provided witha clamping screw -38- for engaging the finger -36-` and holding; the rock-arm.-28- in its adjusted position. i.

It will be seen from the foregoing description that the essential features of my invention are the extensible standard mounted on a suitable supporting base and having the upper end of its upper, section offset a standard forming a U-shape extension which is returned some distance beyond the op- `poslte side of said axisof the standard and vsilipports at its free end, a vertically adjust-l a e chin-piece -l-6-, a laterally adjustable U-shape frame having parallel vertical arms 7'- u on which is mounted a vertically adjustab e yoke `-8-` carrying a tiltable terally at one side of the axis of the' lens frame support -28- together with clampingvdevices for holding the adjustable frames in their adjusted positions. i' j The object of locating the lens-testing frames and their immediate supports some distance beyond one side of the standard is to enable the patient to sit or stand in a natural positionwith the eyes close to the lenses in the frames -9- without material interference with the standard or base so that the patient will not be required to get in any cramped position during the testing operation, and order that this may be done without over-balancing the standard, thev upper-section is oiiset to opposite sides of the standard to bring the strain more nearly directly over the center of the base.

The apparatus thus far described is for testing the eyes at long range, and in order that they may be tested by the same apparatus, at shorter range, I provide a vertically and laterally swinging arm -40- with a suitable isliding frame -41- adapted to receive and retain a printed card or plate containing test characters. This card supporting bar or rod-40- is hinged at one end upon a suitable pivot -42- on a horizontal swinging member 43-, which latter is ivoted at -44- to the underside of the iiub -21-, the swinging axis of the bar -40- and member -43- being disposed at right'angles to the other to allow the bar -40- to swing vertically and horizontally. The hinged end of the bar -40- is provided with a shoulder 45 adapted to en age an abutment -46- on the underside o the hub 21'd to limit the downwardly tilting movement of the free end of the-bar -40'-, such tilting movement being necessary to support the card below thel lens-holders -9- without obstructing the long distance View, and still permit the focusing of the eyes upon the card in the holder 41- by sim ly tilting the lens-holders -9--.

hat I claim: 1. An optical testing apparatus comprisbase therefor, said standard being composed of sections adjustable lengthwise of each other, means for clamping said sections in their adjusted positions, the upper section having a lateral return bend, the upper part of which lies in a substantially horizontal plane and intersecting the axis of the standard, upright arms mounted upon the free end of said horizontal portion, va yoke'mounted upon said arms, and a trial frame mounted upon said yoke; v

2. I'n an optical testing instrument, a pair of upright arms s aced apart and a support therefor, a yoke s idable vertically u on said arms and means for clamping the yo e in its adjusted position and a trial frame pivotally mounted upon said yoke between said arms. vl, In an optical testing instrument, a pair i j of'upright arms spaced apart and a support i therefor, a verticall adjustable chin-rest on the support, a yo e adjustable vertically upon sald arms toward and from the chinrest-and a trial-frame pivotally mounted upon the yoke between said arms.

4. In a device of the class described, an u right frame, a yoke adjustable vertical y v, thereon, means to clamp the oke in its ad- .10

justed position, and a testing ame mounted on the yoke. f A 5. Inan optical testing instrument, a verarm,a stud rojecting laterally ame slidably mounted upon tically adjustable yoke and supporting means therefor, a trial-frame and a sup ort therefor pivotally mounted upon the yo' e.

' 6. In a machine of the class described, a standard having a laterally projecting arm, a chin-piece mounted on the standard, a frame adjustable along said arm toward and from the chin-piece, and lens-holders mounted on the frame. 7. In an optical testing instrument, an 'upf `right standard having a horizontal projecting arm, a laterally projecting stud secured to said arm, a chin-piece mounted u on said om thel chin-piece, a

said stud to and from the chin-piece, means for adjusting said-frame, a trial-frame and a support therefor mounted upon the first named frame. A

' 8. In an optical testin instrument,achinpiece, a frame adjustabe toward and from the chin-piece, a support for said frame, a

yoke adjustable vertically on said frame to- Wardvand vfrom 4the chin-piece, and a trialframe mounted u on said yoke.

9. In an optica testi instrument, a chinpiece, a frame.l adjustab e toward and from the chin-piece, a support for said'frame, a yoke adjustable vertically on said frame toward and from the chin-piece, and a trialfrarne pivotally` mounted upon the oke to permit said trial-frame to be tilted re atively to the'rst named frame 10. vIn an optical teslti 4 instrument, Ia vchin-piece, a frame. adjusts. le toward and from the chiniece, a sup ort for said frame,

I' a yokeadjusta le vertical y on said frame tojmounted upon the Ward and from the chin-piece, and a trial frame pivotally mounted upon the yoke to permit said trial-frame to be tilted relatively to the first named frame, and means for holding the trial-frame in its tilted position.

11. In a device of the class described, a U= shape frame and supporting standard therefor, a yoke slidable vertica ly on the frame, means to clamp the yoke i'n its adjusted osiarms, a yoke slidable alonisald arms, a rockarm mounted on the Vyo e, and a testingframe mounted on the rock-arm.1

13. In a device of the class described, an

tion, and tiltable lens holdersmounte on f the yoke.

12, Ina device of the class-described, 'a Vframe Ahaving upwardly projecting parallel upright-bar, a rock-arm, a support for said laterally in one direction an returned in a horizontal position in the opposite direction across the vertical axis of the standard formarm, a frame of said arm, a

ing a horizontal supporting i ee en chin-piece also mounted u on said arm at one side of the frame, a yo e vertically adjustable upon said frame toward and from the chin-plece, a trial-frame pivotall mountusting s'aid support along ed upon said yoke, a nose-piece a justably I mounted upon said trial-frame, and means to hold the tualframe in its tilted position.

In Witness' whereof We have hereunto set our hands this 28 day of March 1906.

' `JOHN F. FORTH. EDWARD J.- LANGLEY'. Witnesses: p

- H. E. CHASE,

MILDnEn M. No'r'r.

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