US1747859A

US1747859A - Light-bulb-adjusting device

Info

Publication number: US1747859A
Application number: US194560A
Authority: US
Inventors: Guy H Coulter
Original assignee: MONOGRAM LENS CORP
Current assignee: MONOGRAM LENS Corp
Priority date: 1927-05-27
Filing date: 1927-05-27
Publication date: 1930-02-18
Anticipated expiration: 1947-02-18

Description

Feb. 18, 1930. G. HycouLTsR 1,747,359

LIGHT BULB ADJUSTING nsvzcn Filed May 27, 1927 2 Sheets-Shet 1 INVENTOR4 V f,- Co a4 75/? ATTORY Feb. 18, 1930. G. H. COULTER LIGHT BULB ADJUSTING DEVICE Filed May 27, 1927 2 Sheets-Sheet 2 INVENTOR 62 Coo/.727

ATTORNEY Patented Feb. 18, 1930 UNITED STATES.

PATENT OFFICE GUY H. COULTER, OF HIGHLAND PARK; MICHIGAN, ASSIGNOR TO MONOGRAM LENS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAW'ARE LIGHr-BnLB-Anmsrme nnvror.

Application filed May 27,

This invention relates to headlights for automobiles, and especially that type of headlight in which the casing is elongated or bullet-shaped.

In headlamps in which the rear casing wall comes adjacent the reflector, the vertical adjusting means'may easily be mounted upon the wall of the casing, but where the casing wall is spaced at considerable distance from the reflector as in a bullet-shaped lamp, the leverage of the adjusting means becomes so great'that a relatively large movement thereof is required to cause a slight vertical movement of the light source. The prese'ntin vention overcomes this difliculty and pro vides a means to cause vertical adjustment of the lightfsource without necessitating extreme limits of the adjusting means.

One of the objects of the invention therefore is to provide means to vertically and axially adjust the light bulb of an elongated headlight from the rear wall of the casing.

' Another object of the invention is to provide means to eflect the required vertical adjustmentof the light source in a headlight having a relatively long distance between the light source and the adjusting means.

Other objects of the invention, and objects relating to economies of manufacture will be apparent as the description of the invention proceeds. v

One embodiment of the invention has been illustrated in the accompanying drawings in which: k

Fig.1is a sectional side elevation of a headlight embodying my invention;

Fig. 2 is a sectional end viewof the vertical adjusting means taken on the line 22 of Fig. 1;

Fig. 3 is a plan view of the adjusting means, and c Fig. 4 is a sectional view of the socket taken on the line H of Fig. 1.

Referring now more specifically to the drawings, the headlight comprises a casing 10 having a reflector 11 rigidly supported in one end thereof, the reflector and casing being closed by a lens 12 secured in any desired manner as by a rim 13 attached to the casing by screws 14:. The usual gasket 15 to 1927. Serial No. 194,560.

insure a tight fit between the lens and reflectormay be inserted between the lens and a flange 16 extending outwardly from the periphery of the reflector. The reflector 11 is provided'with an aperture 17 adjacent its axis in which a socket 18 is adapted to be loosely supported for receiving an electric light bulb 19. A rib 20 is provided on one side, preferably the top of the socket, and is adapted to engage a slot 21 formed in the aperture 17 in the reflector to permit axial movement of the socket with respect to the reflector but prevent rotation thereof. An

arm 22 is rigidly attached to the socket 18 and may, if desired, be formed. integral with the rib 20, as illustrated. This arm 22extends rearwardly of the socket and terminates in a bifurcated bearing 23 in which is rotatably mounted a pin 24, the rotation of the pin being on an axis transverse to the axis of the arm 22. A screw 25 having a head 26 is rotatably mounted in an aperture 27 in the rear wall of the casing. The inner end 28 of the screw 25 is threaded into an opening 29 in the pin 24, and hence by rotating the screw 25, by means of the head 26, the arm 22,"and socket 18, will be caused to move axially with respect to the reflector. V I y In order to effect the vertical adjustment of the light source, a supporting plate 30 is attached to the casing as by solder 31, or in any desired manner at a point substantially midway between the socket and the outer wall of the casing,the plate being provided with a slot 32 through which the screw 25 passes and in which the screw may have ver= tical movement. A plate 33 is mounted adjacent the plate 30, the screw 25 passing through a hole 34 therein, and is adapted to raise and lower the screw 25 when itis shifted up and down. In order to move the plate 33 up and down, a circular opening 35-is provided in the plate, the edge of the opening being turnedoutwardly to form a transverse circular flange 36. A cam 37'comprisin'g a circular disk whose edge is transversely extended to form a flange 38is adapted to fit up against the plate 33 so that the flange 38 extends over the flange 36 and forms a bearing therewith. The cam 37 is eccentrically mounted on a rod 39, the end 40 of the rod being squared to prevent rotation of the cam with respect to the rod. The rod 39 extends through an opening 41 in the plate 30, which forms a bearing for the inner end thereof, and through an opening 42 in the rear wall of the casing which forms a'bearing to support the outer end. A head 43 may be rovided on the outer end of the rod 39 an a portion of the rear wall of the casing may be inset, as at 44, to provide a bearing surface for the head 43. A washer 45 is provided on the inner end 40 of the rod 39, and may be held on the rod by a pin 46, passing therethrough. A spring 47 is provided around the squared end 40 of the rod 39 and bearsagainst the washer 45 and the cam 37, thereby holding the cam and plate 33 against the plate 30 and the rod 39 in its innermost position.

A; second spring 48 is provided around the screw 25 and bears against the plate 33 at one end and the bearing 23 at the other thereby urging the adjusting screw 25 and the socket 18 toward the inner limit of its movement and assisting in maintaining the plate 33 against the plate 30. r

The operation of the device may be et fected by turning the heads 26 and 43.

When the head 26 is turned, the screw threads into or out'of the pin 24, thereby moving the socket 18 axially with respect to the reflector, and hence the light source is moved axially withrespect to the focal point of the reflector. When the head 43 is turned, the rod 39 and cam 37 are rotated,and as the cam is eccentrically mounted, a lateral shifting of the plate 33 is effected. This causes the end of the screw 25 to move vertically, pivoting about the head 26. At the same time, as the pin 24 is free to pivot with respect to the arm22, a tilting of the arm 22 and socket 18 in the aperture 17 of the reflector results. This causes vertical movement of the light source, and the proper adjustment thereof with respect to the reflector axis may easily be obtained. 7

While I have illustrated one embodiment of the invention, many changes may be made in the construction without departing from the spirit of the invention, and I desire it to be understood that my invention is not limited to any specific form or arrangement of parts except in so far as such limitations are specified in said claims."

Having thus described I desire to claim is 2- 1. In a headlight, a casing; a reflector within said casing; a light bulb socket movably mounted in said reflector; means extending between said socket and the rear wall of said casing to adjust said socket axially with respect to said reflector, said means including a hinge connection; a support posimy invention, what tioned'between said socket and said rear wall;

and cam means rotatably mounted on said support and cooperating with said axial adjusting means to eliect a change in angularity of said hinge connection whereby said socket is tilted with respect to said reflec- 2. In a headlight, a casing; a reflector within said casing; a light bulb socket movably mounted in said reflector; means extending between said socket and the rear Wall of said casing to adjust said socket axially withrespect to said reflector, said means including a hinge connection; a support positioned between said socket and said rear wall; and cam means rotatably mounted on said support and cooperating with said axial adjusting means to effect a change in angularity of said hinge connection whereby said socket is tilted with respect to said reflector; and means to operate said cam means from said rear wall.

3. In a headlight, a casing; a reflector Within said casing; a light bulb socket movably mounted in said reflector; means extending between said socket and the rear wall of said casing to adjust saidsocket axially with respect to said reflector, said means including a hinge connection; a support positioned between said socket and said rear wall; a rod rotatably mounted between said rear wall and said support; a cam mounted on said rod to rotate therewith; and means adapted to 'be shifted by said cam and cooperating with said axial adjusting means to tilt said socket when said rod and cam are rotated.

4. In a headlight, a casing; a reflector within said casing a light bulb socket movably mounted in said reflector; means extending between said socket and the rear wall of said casing to adjust said socket axially with respect to said reflector, said means including a hinge connection; a support positioned between'said socket and said rear wall; arod rotatably mounted at one end in an opening in said rear wall and at the other end in an opening in said support; a head on the end of said rod outside of and adjacent said rear wall; a cam mounted on said rod for rotation therewith; and a plate engaging said cam and cooperating with said axial adjusting means to change the angularity of said hinge connection whereby a tilting of said socket is effected.

5. In a headlight, an elongated casing; a reflector within said casing; a bulb socket movably mounted in said reflector; an 'arm rigidly attached to said socket; a member pivotally connected to said arm; a support attached to said casing and positioned between said socket and rear wall; a screw rotatably mounted in the rear Wall of said casing and threadedly engaging said member whereby rotation of said screw producesaxial movement, of said socket; a rodrotatably mounted at one end in an opening in said rear wall and at the other end in an opening in said support; a head on the end of said rod outside of and adjacent said rear wall; a cam mounted on said rod for rotation therewith; and a plate engaging said cam and cooperating with said axial adjusting means to change the angularity of said hinge connection whereby a tilting of said socket is effected.

6. In a headlight, a casing; a reflector in said casing; a light bulb socket in said reflector; means to axially adjust said socket with respect to said reflector; and means to transversely displace said axial adjusting means to effect a tilting of said socket, said means comprising a plate cooperating with said axial adjusting means; a transverse circular rib attached to said plate; a cam adjacent said plate; a transverse flange at the periphery of said cam adapted to fit over and bear against said circular rib; and means to hold said cam against said plate.

In testimony whereof, I affix my signature.

GUY H. OOU'LTER.