US1066386A - Ophthalmoscope. - Google Patents

Description

H. L. DB ZENG. OPHTHALMOSGOPE.

APPLICATION FILED JULYB, 1910.

Patented July 1 RIIUnn:

" and useful 01 UNITED stares; PAirEN'r caries.

HENRY L. DE ZENG, or MAPLE snaps, New JERSEY.

orzicrimmuoscorn.

To all whom it may concern: v 'Be it known that I, HENRY L. DE Zeno, a

citizen of the United States, residing at Maple Shade, in the county of Burlington, State of New Jersey,.lia\-e invented a new hthalmoscope, of which the following is a specification.

- My invention relates to a new and useful ophthalmoscope, wherein I provide an electric lamp and means co'ntained'within the instrument for supplying the lamp with the necessarycurrentfor lighting it and with means for varying" the relative position of the reflector andla'mp; i

Figure 1 represents a vertical sectional jview of an ophthalmosco-pe embodying my invention. Fig. 2 represents a rear eleva= tion of'the upper portion thereof on an enla'rged scale. Fig. 3 represents a front elevation of the upper portion of the oplitlialmoscope. Fig. 4 represents an elevation of one. of the disks in detached )ositioi'i. Fi

" 5 represents-an elevatii'in of the -other dish employed. 7

Similar nuineralsf of reference indicate corresponding parts in' the ligures.

Referring to the drawings :l. have found in practice in the. ophthalmoseopes now in use, wherein it is necessary to connect the same with a suit-ahle'sou'i'ce of rurrent'supply, that, in many-instances, it is not possible to do so by reason of the fact that the houses or other localities in which the de vice is to be used, ere not supplied with electricity, and furthermore vthe batteries heretofore employed are large and euinber" some and impractical toearry about from place to'plaee. My invention is desi ned to overcome these defects and in the draw- I have shown a construction which I- inqs haze found operates successfully, but it will be evident that changes may be 'made in the construction, the arrangement of the peg-ts 'may'be varied and other instrumentalities may be employed which will come within.

Specification of Letters Patent. 'n iicati'on filed Jui' a, 1910i Serial No. 570,938.

Pate-1i ted July 1, wire number of lenses or open rugs and ad acent which disk is a second plate or disk 4 which is also provided with having a suitable a suitable number of lenses properly inouiited therein and with an opening free from a1 lens, itibeiug understood that the said plate; or disks are provided with proper -notathins In the preseutinstance, the casing? ll-lsuitably mounted. in anydesired nianneix upon a sleeve the upper end of which is provided with aeondensing lens 6 which is carried or mounted therein in any suital'ile or desired manner. The sleeve 5 is'a-da ted to receive and to slide upon the tube TNliidll inthe present instance is in 't-hreaded engagement with the handle 8 of the ophthalmes-cope. said handle being tubular in form and of any suitable size and diameter) Car'- ried by the tube 7 is a 'sleeve 9 one end of which is closed. as by an insulator l0 in the present instance. i'iite'gral with said sleeve 2' and '-\'\lll( ll is provided.with an opening thiough which. passes an electricaleoui'l-iu-tor ll having aheap l2 ad]a(:en t one.

end and against which cap -hears' a coil spring 13, theoppo'site end of which bears against the insulator 10 in order to hold the conductor ll inits extended position, it being understood that when tlie'eonductoris forced downwardly, frointhe position seen in Fig. 1 the cap '12 a'buts' the end of the sleeve 9 in order 'to limit the movement of the sa id conductor. the conductor 11 carries a contact screw 1.1-. The inner portion of the tube 7 adjacent. its outer end is threaded in'order to receive the threaded base 15 of lamp 16 which is In the present instance adapted to be contained. in tlie'sleeve 5, as

will be evident from Fig; 1, a closure for the opposite end of the handle 8, which parts,'in the present instance. are in threaded engagement with eachother-, and said closure carrying a springs-rm 18,;

the free end of which'is adaptedto-be'en caged by any suitable means, such'a'sj a thumb screw 19, in threaded engagement with the closure 17,- in order that the spring armmay be forcedinwardl i 20 designates a fiber disk carried bythe' closure 17, said disk 20 having an opening at a. suitable poi nt therein inorder to permitmovement therethrough oftheend of the spring arm 18.

21 designates a metal plate carried upon 17 designates the fiber disk 2-0 and with which plate the spring arm 18 is adapted to contact when suitably actuated therefor.

22 designates a spring seated upon the metal plate 21.

23 designates a battery adapted to be contained within and carried the handle 8 and one pole of which battery 23 is adapted to bein cont-actwith the spring 22, the other pole of the battery 23 being in contact with a pole of a battery 24 alsocontained within, and carried by the handle 8, the opposite pole 25 of this battery being in Contact with the contact screw 14 carried by the conductor ll.

26 designates an oblique mirror carried by the casing 2 of the ophthalmoscopc and suitably situated with respect to the condensing lens 6 in order to receive the rays of light therethrough and to reflect the same to a proper point.

it will be understood that the lamp 1G is screwed into the tube 7, causing the contact point of the lamp 2 to abut the cap 12 of the conductor 11, and by reason of the resilient support for the conductor 11, that is spring .13, a suitable amount of play is permitted to said conductor 11 and whereby the lamp can be properly screwed into the tube 7 to prevent injury to the parts and to maintain electrical Contact. \Vhen the; spring '{Uilf 18 is out of contact. with the metal plate 21, as seen in Fig. 1,- the circuit is open and no current is passing to the lampG, but when the thumb screw 19 is properly actuated, the end of the spring arm 18 is moved into engagement with the metal'plate 21, thus closing the circuit which will be formed by the pole of the lamp contacting with the conductor 11, the latter with the pole 25 of the battery 24, the oppositeepole of which battery 24 being in contact with the pole of the battery 23, the opposite pole of said latter and this latter is in contact with the metal )late 21, with which the spring arm 18 has been forced into contact,'so that the circuit passes through the closure 17, handle 8, tube 7 and SOCltG-tor base 15 of the lamp, which will accordingly be lighted and the raysof which will be directedth'rou gh the condensing lens Gto the mirror 26 and so properly reflected. e

5 on the tube 7, the position of the condens ing lens 6 with respect to the lamp 16 may jection of the reflected light, governed as desired.

The arrangement and operation of the plates or disks and lenses may be accomplished in'any desired manner.

Having thus described my invention; what I claim as new and desire to secure by Letters Patent, is:

F In a diagnostic instrument, 'a handle adapted to carry a source of electric energy hers, the inner carriedby the handle and-the tric lamp supported by the said inner member of said adjustable members, and a reflector and a condenser carried by said diag-.

nosticinstrument. i

r HENRY L. "DE ZENG.

lVitnesses: v 7

F; A. NEWTON, C. D. MCVAY.

battery being in contact with the spring 22 reason oft-he adjustability of the sleeve 7 outer supporting said instrument, an elecbe varied as may be necessary, and the proa diagnostic instrument,' adjustable meni

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