US 624392 A
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awwion SEABQHWROOM Pam-.aad may 2, |999. n. n. SMITH. SURGICAL LAHP.
(Application led Apr. 25, 1898.)
2 Sheets-Shset l.
n. n. smlTlH.
(Application led Apr. 25, 1898.)
y (No Model.)
Patented May 2, |899.
2 sheets-sheet z,
31m/u on to 'L UNITED STArEsPATENT .OFFICES ADAVID D. SMITH, or INDIANAIoLIs, INnIANaASSIeNoR SMITH AND FLORENCE FOSTER eRowELI.,
To ADDIE RENNICK or SAME PLACE.
suse ioAL LAM P.
SPECIFICATION filming pm of Letters Patent Nace/1,392, dated May 2, 1899.
' Appuoantn ined Api-i1 25,1898. fseriai No. 673,315; (No model.)
' To 'all whoml zit may concern? #Be it known4 that LDAVID D. SMITH, of Indianapolis, county of Marion, and State of Indiana, have invented a certain newand useful Surgical Lamp;
and I do hereby declare ih at the following is a full, clear, and exact deseription thereof, reference being had to the tion of the lamp-holder.'
accompanying drawings, in which like numerals refer to like parts.
, This invention relates to a surgical ordental lamp or search-light which involves the application of the principle of total reflection of light and comprises a transparent rod i101' insertion in the hody and thetransmission of light, with a lamp or light at its outer end.
This lamp or search-light can be used for surgical and dental purposes and is whollyA free from heat in the part' that touches or e' rs the body. lYith such a lamp no inconvenience results when it touches the body, and the operator need pay no attention to that matter, and it can also be used for any length of time in one operation without any inconvenience from heating. The portion ot' the device which penetrates the oriiiees of the body isv free from danger of breakage or of any rough or cutting surfaces that might abradc the body. To that end a glass rod made of as tough a quality of glass as desiredand with its `surfaces perfectly smooth is used. In this respect it not only acts as a means for transmitting light, but also can be used as a tool, as it is as smooth and Strong as the ordinarytools used for holding or pushing parts away.
Anotherfeature is the Simplicity and cheapness 'or economy of the device and its smallness, lightness, and ease of manipulation and use.
. These, together with the other features of my invention, will.1no1e fully appeal' from the accompanying drawings and the description and claims following.
In the drawings, Figure 1 is anA elevation of my invention where an incandescent lamp is used. Fig. 2 is a longitudinal central section vof the same, excepting the glass rod, which is modified and shown in elevation. Fig. 3 is a detail of the incandescent lamp and its attachment. Fig. 4. is a detail in sec- Fig. 5 is a longitupossibilities.
`[lector with the glass rod in cross-section.
Vhat I have shown is merely for the pur- 6o pose of illustrating my invention rather than indicating the extent of its application or In the first six figures I have illustrated my apparatus wherey an incandescent lamp is used and in the remaining figures where an acetylene-gas lamp is used.
In detail, I is a solid glass rod which is to be seen extending into a lamp-holder 2. This lamp-holder may be of any suitable form for containing a lamp or light. on a line with the 7e center of the glass rod. The end of the glass rod l that extends into the lamp-holder has a smooth surface, preferably at right angles tothe center line of the glass rod. The gls lrod is `)referaolv round and its surface very sin o othlypolished to cause a reileet-ion of the ra'ilight that )ass loniutudlnall through it-an( .o prevent their passage onto the rod until they reach the other end thereof. The diameter and length of the body of the glass So may be such as is desired. The other end that is, the end from which the light emannt-es-may be formed in any way for the particular purpose desired. .In the drawings four forms are illustrated. In all of them S5 the light .radiates from the end, and by turning the end as seen in Fig. 7 the light may he put behind a cavity or part to be illuminated. In Fig. l the lighted end .is bent at right angles to the center line of the body of the rod. In Fig. 2 the angle is less. In Fig. 8 the rod is straight. By increasing the diameter of the red and proportionately. de creasing the diameter or size ot the lighted end the intensity of the light emanating from suchendis proportionatelyincreased. W'here the lighted end is curved as seen in Fig. 7 the rays of light are focused to a. point near the lighted end, and crossing each other at such focused point spread away from-such :oo point. Therefore by placing such lighted end Y near' the part to be .examined the light is in- `tense, but limited to its scope, whereas ifthe Vend be placed somewhat farther away from the part being examined the field of lightV is considerably increased, although the intensity is correspondingly diminished. Therefore the surgeon can adjust the lighted point to suit his use. He can at first examine a considerable surface and then more closely examine certain parts of that surface bya ro slight movement of the lighted end of the glass rod.
There it is not desired to concentrate or focus the light on a point, a very good form of the lighted end is that shown in Fig. 2, where the end is ground flat; but even in this case the intensity of the light desired may be modified by reducing the diameter of the end. These glass rods are perfectly smooth at all points, and therefore cannot cut or abi-ade. They are strong and can be made tough, so that there is no dangerof breakage or otherwise doing injury to the body. IIence they can be used simultaneously for the purpose of illuminating a certain part of the body and for holding back or displacing parts, like several of the ordinary surgical instruments.
The lamp-holder 2 is lmade preferably of hard fiber and is cylindrical, as shown. Its diameteris preferably about one inch. lVithin this is inserted an incandescent lamp 3, that is held iu the plug 4, that is made of hard fiber also and of such diameter as to slip tightly in at one end of the lamp-holder 2. A metal screw 5 connects with the lamp, and so does the wire 6. The circuit is closed by the switch '7, that is pivo ted ou the screw 5, so that one of its arms will engage the wire S. The switch-lever has a little finger-piece 0 to make it easily operative.
The rear half of the globe of the lamp at lO'is coated with silver to make a reflector upon the lamp. In front of the lamp a metal reflector 1l is placed, being held by the hardfiber cylinder l2, that slips tightly into the end of the lamp-holder 2. The reflector 1l l is thiml'ilc-shapcd and deflects all the rays of light from the lamp to the glass rod. 13 isa rubber' sleeve fitting in a suitable seat for the reception of the glass rod. lVith this arrangement the glass rod can be readily changed, so -that if the surgeon or, dentist has severalof them in various forms on hand he can readily replace and use them as the needs of his work require.
The lamp-holder is provided with a series of apertures l5 for ventilation to reduce the temperature thereof.
To reflect the lghtoutward from theorifico ofthe body that is being examined, where the opcratorcannot see the parts desired, I mount on the inner end of the glass roda reflector ,14, so that it can be adjusted to properly direct the light to the su rgcons oye. This may be in any.suifablc form, that shown heilig seaperture elliptical in cross-section of such dimensions that the rubber will bind the glass and remain in any position in which it is placed.
W'hat I claim as my invention, and desire to secure by Letters Patent, is-
l. A surgical lamp including a perforated tubular body, plugs for closing the'ends thereof, one of said plugs being hollow, a glass rod with one end mounted in the hollow plug, and means for maintaining alight insaid tube in line with the glass rod.
2. A surgical lamp including a perforated tubular body, a removable plug for closing the ends thereof, one of said plugs being hollow, a glass rod with one end mounted in the hollow plug, an incandescent lamp so secured to the other plug as to be held in line with said rod, and a suitable electrical connection with said lamp through said plug.
3. A surgical lamp including a lamp-holder, a lamp therein, a conical reflector immedidiatelyin frontof thelight, and atransparent rod with one end secured adjacent to the small end of such conical reflector.
4. A su rgical lamp including a transparent rod with one end so placed that the light will enter it, and an adjustable reflector mounted on the other end of such rod.
5. A surgical lamp including a perforated tubular body, a removable plug for closing the ends thereof', one of said plugs being hollow, a glass rod with one end mounted in the hollow plug, an incandescent lamp so secured to the other plug as to be held in line with said plug, and a switch secured to said plug for opening and closing said electrical connection.
G. A surgical lamp including a perforated tubular body, a removable plug in each end thereof, one plug being hollow, a glass rod with one end secured in the hollow plug, means for maintaining a light between said plugs, a reflector carried behind the light by one plug, and another reflector in front of the light secured to the other-plug.
7. A surgical lamp including a perforated tubular body 2 and plugs 4 and l2 to close theends of such tube, said plug l2 being hollow with a flaring inner wall, a reflector secured to said flaring wall, a rubber ring 13 fitting in the outer end of the plugI 12, a' glass rod in one end secured in said rubber ring, and means for maintaining a light within said tubular body in liuc with the glass rod.
In witness whereof I have hereunto affixed mysignaturc in the presence of the witnesses herein named.
DAVID D. SMITH. \Vifnesses: y