US1590019A - Headlamp - Google Patents

Description

June 22 1926. 1,590,019

c. E. GODLEY HEADLAMP Filed Sept. 10, 1925 Patented June 22, 1926.

warren STATES 1,590,019 PATENT orrice.

CHARLES GODLEY, OF DETROIT, MIGHIGAN, ASSIGNOR TO EDMUNDS & JONES COR- r IPOIRATION, 013 DETROIT, MIGHIGAN, A CORPORATION OF NEW YORK.

HEADLAIMP.

Application area September '10, was. Serial 1%. 55,543.

My-invention relates to a lamp construction designed'to provide access to the reflector and the focusing device without removing the lens front of the lamp, and

a adapted'also to afford a sheet metal casing for an ovoid reflector.

Among its general objects, my invention provides a lamp casing in which the forward portion is stationary and carries the 10 lens, while the rear portion is detachable and is normally secured in position through a thrust-receiving member carried by the forward portion; in which the forward part of a transversely split reflector may remain 15 stationary while the rear part is detachable; in which the rear reflector part may be held in position by means acting through the same thrust-receiving member which operatively connects the 'two casing parts; and

20 in which a tight sealing of the casing partscan readily be secured.

Still further and also more detailed objects will ap car from the following specification and rom the accompanying draw- 28 ings, in which drawings Fig. 1 is a central, vertical and longitudinal section through a headlamp, showing my invention as employed with a lamp having the optical features disclosed in my coa pending application #745,301, filed Oct. 23,

1924 on an automobile headlight.

Fig. 2 is a vertical section taken at right angles to Fig. 1, along the line 2-2.

Fig. 3 is a fragmentary interior plan view, taken from the line 3-3 of Fig. 1 and showing part of the yoke or thrust receiving member and of the connector through which current is supplied to the lamp.

Fig. 4 is an enlargement of the central upper portion of Fig. 1.

In the illustrated lamp, light from a lamp bulb 1 is directed through a lens 2 by an ovoid reflector which comprises a forward section 3 -(secured by screws 4 to the lens ring 5) and a rear section 6, the two sections having their adjacent ends provided with interfitting flanges 7 and 8 which alin'e the reflector section while permitting the rear section to be detached by a mere rearward movement thereof.

As a simple and inexpensive housing for such a reflector, I provide a sheet metal casin, which is also split transversely of the lamp. This casing comprises a tubular forward portion 9 provided at its forward end till with an inwardly directed flange 10 which is secured by screws 11 to the lens ring 5.

This casing portion '9 also is secured to the support for the lamp, here shown as including a cup-shaped part 12 riveted to the said forward casing portion. The rear casing portion 13 has at its forward end aninwardly directed annular flange 14 which abuts against a correspondingflange 15 on the rear end of the forward casing portion 9, and the latter flange has a rearwardly directed cylindrical extension 16 forming a. tubular part which slidably fits the bore of the flange 14, as shown on a larger scale in Fig. 4.

ccured to the forward casing portion 9,

as by welding its forwardly directed free ends 17 to this casing portion, is a yoke 18 which has its majorportion disposed between the rear end of the reflector part 6 and' the rear casing portion 13. This yoke. which forms the thrust-receiving member of my lamp, preferably is freely spaced from the rear casing portion and has its bight sufficiently spaced from the rear end of the reflector to permit ready access to a focusing socket 19 which holds the lam bulb 1. Extending through the rear end 0. the casing, and preferably axial of both the reflector and the casing, is a screw 20 which desirably has its head disposed in a casing recess 21 and which is threaded into a nut 22 fastened to the bight of the yoke 18. A

tightening of this screw forces the rear cas-v ing part 13 forwardly, thereby pressing the flanges 14 and 15 against each other and insuring a tight joint between the two parts of the casing.

To hold the rear reflector part 6 in posi- 1 rearwardly, and by allowing sufficient slack in the wire 26 which leads from the inlet plug 27 to the focusing socket 19, ll can permit the rear casing part to be swung entirely clear of the yoke. The user then has ready access to the focusing socket for making any needed adjustment. Likewise, by backing up the screw 24, he can release the spring 25 so tiat the rear reflector section can be drawn back to permit access to the lamp bulb and to allow for a cleaning of both reflector sections.

Since both the lens ring and the yoke and in stiffening the forward casing part, I can employ relatively light metal or the same. Likewise, the engagement of the bore of the flange 14 of the rear casing part with the tubular rear end portion 16 of the forward casing part stiifens the forward end of the rear casing part, and the semi-ovoid shape of this rear casing part also adds to its rigidity, hence I can similarly employ a light gauge of metal for the same. By using the yoke for resisting the thrust of the spring which holds the two reflector sectlons adjoined I avoid having the action of.

this spring indent any relatively thin casing part, and by fastening the yoke to the casing opposite the support .12 I insure a general rigidity. Moreover, I may have the tubular rear end portion 16 of the forward casing section rest directly on the yoke as shown in Fig. 1, and to permit a convenient location of the circuit wire I may provide the yoke with an elongated perforation 28 through which the connector 27 extends. To open the casing, the screw 20 is first unscrewed and removed; thereby permitting the rear casing section 13 to be slid slightly rearward and then tipped downward rearwardly, so that the plug 27 moves downwardly out of the lower arm 18 of the yoke, such movement being permitted by the length of the flexible wire 26 leading from the plug to the lamp socket. Access is then afforded to the interior of the rear part of the casing, so that the user can snap the rear end of the spring 23 off the tip of the screw 25, thereby leaving the rear reflector section free to beretracted.

However, while I have heretofore describedmy novel casing in connection with a lamp having certain optical features, I do not wish to be limited to any particular employment of the novel features of my invntion. Neither do I wish to be limited to the details of the construction and arrangement here disclosed, since these might be varied in many ways without departing either from the spirit of my invention or from the appended claims.

I claim as my inventioi1:-

1. In a lamp, a lens ring, a casing comprising two sections disposed one behind the other and having the forward section secured to the lens ring, a reflector housed by the casing; a thrust-receiving member secured to the forward section of the casing and extending within the casing for releasably connecting the latter to the thrust receiving member, the thrust-receiving mem- LBQQQIQ ber having a shoulder and the forward casing section having an inwardly directed part engaging the shoulder, and releasable means connecting the thrust-receiving member with the rear casing section.

2. In a lamp, a lens ring, a casing comprising two sections disposed one behind the other and having the forward section secured to the lens ring, a reflector housed by the casing; a thrust-receiving member secured to the forward section of the casing and extending within the casing for releasably connecting the latter to the thrust-receiving member, the thrust-receiving member having a shoulder adjacent to the rear end of the forward casing section and the said casing section having an inwardly directed part engaging the rear face of the said shoulder, the rear casing section having a forward end portion engaging the said inwardly directed part of the forward casing section, and releasable means connecting the thrust-receiving member with the rear casing section.

3. In a lamp, the combination of a lens ring, a casing comprising two sections disposed one behind the other and having the forward section secured to the lens ring; a reflector housed by the casing and comprising two parts disposed one behind the other, the forward section being secured to the lens ring and the adjacent ends of the two reflector parts being sleeved upon each other to aline the said parts: a thrust-receiving member secured to the forward casing secf tion. means extending through the rear casing section and releasable from the exterior of the casing for moving the rear casing section forwardly with respect to the said member. and means interposed between the said member and the rear reflector part for urging the rear reflector part forwardly.

4. In a lamp. a lens ring, a casing comprising two sections disposed one behind the other and having the forward section secured to the lens ring. a reflector housed by the casing; a yoke freely spanning the rear end of the reflectorand having its arms secured to the forward casing section, threaded means connecting the rear casing section with the yoke for forcing the rear casing section forwardly; a thrust-receiving member threaded through a rear portion of the yoke. and a compression spring interposed between the said member and the rear end of the reflector.

5. A lamp construction as per claim 4,, in which the is secured to the rear end of the reflector and is adapted to be manually flexed to release it from engagement with the thrust-receiving member.

lidfn a lamp. a lens ring. a casing comprising two sections disposed one behind the other and having the forward section secured to the lens ring, a reflector within the casing, a yoke freely spanning the rear end of the reflector and having its 'arms secured to the forward casing section, each arm having a rearwardly facing shoulder adjacent to the juncture of the casing sections, and releasable means connecting the yoke with the rear casing. section for drawing the latter forwardly; the forward casing section having an inwardly directed radial flange engaging both of the said to shoulders and having a tubular rear end, the rear casing section-having its forward end sleeved upon the said tubular rear end and engaging the said radial flange.

Signed at Detroit, Michigan, September 3rd, 1925.

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