US2278916A - Illuminating device - Google Patents

Description

April 7, 1942,.

D'. l. CRITOPH El AL ILLUMINATING DEVICE Filed April 13, 1940 4 SheetsSheet 1 O5CAR W RKlHRRDS DAVE) LCRWOPH HEN%. sc HRADER 4 A T T 2 NE Y IN VE/VTORS April 7, 1942- D. l. CRITOPH Erin. 2,278,916

ILLUMINATING DEVICE Filed April 13, 1940 Sheets-Sheet 2 IN VE/VTORS ObcAR W. RICHARDS DI-\V\D I. cRvroPH HENRY scuRAoER April 7, 1942. D. l. CRITOPH ETAL 2,273,916

ILLUMINATING DEVICE Filed April 13, 1940 4 Sheets-Sheet 3 IIIII i IN VE N TORS oscAR w. RICHARDS DAVlD I. CRFFOPH BY HENRY CHRIDER A TTOZNEY A ril 7', 1942.

D. l. CRITOPH EI'AL 2,278,916

ILLUMINATING DEVICE Filed April 13, 1940 4 Sheets-Sheet 4 IN VE N TOR S oscmz w. mcnakns DAVID 1. CRHOPH H RY 5. SCHRADER ATTORNEY Patented Apr. 7, 1942 Es; PATENT orricE 7 2,278,916 ILLUMINATING DEVICE David I. Critoph and Henry S. Schrader, Buffalo,

I and Oscar W. Richards, Snyder, N. Y., assignors to Spencer Lens Eompany, Bufialo, N. Y., a corporation of New York Application April 13, 1940, Serial No. 329,462

3 Claims.

This invention relates to illuminating devices and more particularly to new and improved illuminating device which will be cooler during use.

One of the objects of the invention is to provide a new and improved illuminating device of the character set forth.

Another object of the invention is to provide a new and improved device of the character set forth which will be. cooler during use allowing the'adjustment of the device to desired position.

Another object of the invention is to provide new and improved means for ventilating the interior of such a device to prevent its overheating during its use.

Another object of the invention is to provide simple, efiicient and economical means for ventilating and cooling an illuminating device.

Another object of the invention is to provide new and improved reflector adjusting means for illuminating means.

Another object of the invention is to provide a new and improved illuminating device wherein lumination for microscopes, it is necessary that ing use.

the parts may be quickly and easily assembled or disassembled- Another object of the invention is to provide new and improved'adjusting means for illuminating means.

Other objects and advantages will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that many changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as expressed in the accompanying claims. We, therefore, do not wish to be limited to the exact details shown and described as the preferred form has been shown by way of illustration only.

Referring to the drawings:

Fig. 1 is a side elevation of one form of the invention;

Fig. 2 is a front view of the form shown in Fi 1:

Fig. 3 is a sectional view taken on line 3--3 of Fig. 2;

Fig. 4 is a sectional view taken on line 4-4 of Fig. 3, looking in the direction of -the arrows;

Fig. 5 is a sectional view taken on line 55 of Fig. 3, looking in the direction of the arrows;

Fig. 6 is a sectional view taken on line 66 of Fig. 3, looking in the direction of the arrows;

the device be moved to adjust the light projected therefrom into desired focus and adjustment with the instrument. To do this it is necessary to touch the illuminating device with the .hands and it is therefore important that the device be so constructed that it will be as cool as possible and not be too hot to adjust with the hands dur- It is therefore the primary purpose of this invention to provide an illuminating device of the typeset forth which will be cool enough during use that it may be adjusted and focusedto desired position .without burning the hands.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout the several views,

the form of the device shown in Figs. 1, 2 and 3 comprises a base I on which are the pivot ears 2 and pivot 3. Pivotally mounted on the pivot 3 is the lamp-house support 4 which is adapted to be adjusted to desired angular position by means of the screw 5 having the thumb wheel 6 and ball joint I so that by turning said thumb wheel 6 the lamphousev may be adjusted to desired angular relation with the base I.

On the support .4 is the lamphouse 8 comprising the rear housing or portion 9 and front housing or portion Ill. The rear portion 9 carries the lamp socket ll carrying the lamp l2, the

switch I3 which is connected in'one line ll of the current which then continues to the socket I l and the other line I5 of which is secureddirectly to the lamp socket II.

The rear housing 9 also carries the reflector l6 which is supported by the support I! and may be adjusted by turning the adjusting screw I8.

Over the lamp I2 is secured the chimney mem 'ber l9 having the opening 20 to allow light from Fig. 7 is a sectional view taken on line '|-1 of Fig. 3, looking in the direction of the arrows; Fig, 8 is a side view, partly in section of a modified form of lens supporting housing;

the lamp to beprojected. This chimney I9 is secured in position by the screws 2|, and is open at its bottom surrounding the base of the lamp and has the light deflecting members 22 at its 2 upper end to prevent the light from escaping but allowing a current of air to enter at the bottom and pass through said chimney member I9 and to escape between the deflecting members 22.

The rear housing 9 also has the set screws 23 which are adapted to enter slots 24 adjacent the edges of the rim 25 on the front housing I whereby the rear housing 9 may be secured in operative position by then tightening the said screws 23.

The front housing l0 comprises ventilating ring 41 and the extending portion 25 containing the objective lens system 26 and holder therefor 21 which is adapted to be adjusted so as to focus the light emanating from the lamp I2 by the rack 28 and pinions 29 which may be adjusted by rotating either of the thumb Wheels 30.

.The interior of the device is formed so as to have a medium bright bare metal finish. The exterior of both the front housing It) and rear housing 9 are provided with fins 3|, which are preferably finished in dull black, although it has been found preferable in the commercial construction to finish the exterior in a black crinkled finish.

The number of said fins 3| must be balanced to the thickness of the fins, thickness of the lamphouse and diameter thereof. The fins increase the radiating area of the surface and when they are spaced properly allow air to circulate between them.

If desired the front housing I'D may be provided with only one lens focusing knob or with a knurled adjusting ring 32 as shown in Figs. 8 and 9.

In the form of the invention shown in Figs. 10, ll, 12 and justable stand 34 t0 the upper end of which is secured the illuminating device.

The illuminating device comprises the rear housing 35 and the front housing 36. The rear housing 35 is secured at its forward end by the.

screw or the like 31 to the support and the rear portion of the front housing is adapted to frica light trap 13, the base 33 supports the adtionally engage the front end of the rear hous- I ing to retain the parts in assembled relation.

On the rear housing 35 is the lamp socket 48 supporting the lamp 38 and adapted to be retained in operative position in the housing by the set screw 39. The socket 48 has the ventilation grooves or openings 49, circumferential thereof to allow air to enter the body of the lamp through said openings 49 and then pass through the housing 35 between the lamp 38 and the walls of the portion 35 and then be exhausted through the circumferential light trap ventilating ring 4!.

The front housing 36 contains the focusing lens system 42 adapted to be adjusted to focus the light by turning the knurled ring 43 which through the slot 44 and set screw 45 causes the lens system to move to focus. the light.

Adjacent its forward end, the rear housing member has the slots 45 which are in alignment with the light trap ring 4 I.

In this form the rear and front housings are also provided on their inner surfaces with a medium bright bare metal finish and on their outer surfaces with dull black or black crinkle finished fins as stated above for the other form of the invention.

It has been found that with the ventilation arrangements as shown and described and with the inner surface of the.housings of a medium bright bare metal finish combined with the dark fins on the exterior of the housing that an illuminating device may be constructed which will be much cooler in operation than was possible with prior art structures.

In view of the above it will be seen that we have provided simple, eflicient and economical means for obtaining all invention.

Having described our invention we claim:

1. In a device of the character described, a rear housing, a lamp in said rear housing, a front housing in alignment with said rear housing, a lens system in said front housing in optical alignment with said lamp, the interior surface of both of said housings having a medium bright metal finish and the exterior of said housings having a plurality of fins, said exterior being of a dark color, and an overhanging flange adjacent the edge of one of said housings and spaced from an overhanging an opening in the other of said housings to allow ventilation of the interior'of said housings.

2. In -a device of the character described, a rear housing having an opening adjacent its forward end, a lamp in said rear housing, a front housing in alignment with said rear housing, a lens system in said front housing in optical alignment with said lamp, the interior surface of both of said housings having a medium bright metal finish and the exterior of said housings having a plurality of fins, said exterior being of a dark color, and an overhanging flange adjacent the rear edge of said front housing and spaced from and overhanging said opening in said rear housing to allow ventilation of the interior of said housings.

3. In a device of the character described, a rear housing having diametrically opposed openings adjacent its forward end, a lamp in said rear housing, a front housing in alignment with said rear housing, a lens system in said front housing in optical alignment with. said lamp, the interior surface of both of said housings having a medium bright metal finish and the exterior of said housings having a plurality of fins, said exterior being of a dark color, and an overhanging fiange adjacent the rear edge of said front housing and spaced from and overhanging said diametrically opposed openings in said rear housing to allow ventilation of the interior of said housings.

OSCAR W. RICHARDS. DAVID I. CRI'IOPH. HENRY S. SCI-IRADER.

of the advantages of the

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