US1224178A - Lamp. - Google Patents

Description

E. A. KUEN.

LAMP.

. APPLICATION FILED APR.7.1916- },18, Patented May 1, 1917.

2 SHEETS-SHEET I.

i 37 1] ll 58 1 13 44 41 6 56 *'/Z J] 76 x 1 61 E. A. KUEN.

LAMP.

APPLICATION FILED APR. 7. ms.

Patented May 1, 1917.

2 SHEETS-SHEET 2.

EUGENE A. KUEN, OF CINCINNATI, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE CORCORAN-VIC'LOR COMPANY, OF CINCINNATI, OHIO, CORPORATION 0310.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed April 7, 1916. Serial No. 89,651..

To all whom it may concern:

Be it known that I, EUGENE A. K UEN, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lamps, of which the following is a specificatlon.

My invention relates to that character of lamps having a rotatable door or closure comprising a transparent member through which the rays of light are projected, and is exemplified in a so-called headlight used for instance, on motor-driven vehicles.

Lamps of this character are subjected to a great deal of vibration and jar during the traveling of the vehicle. It has been found heretofore in structures of this character, that the rotatable closure has become lost during traveling, owing to such vibrations and jars, the closure gradually rotating in unclamping direction in spite of having been supposedly securely fastened.

It is the object of my invention to provide means I whereby when closing rotation between the closure and body has been effected, the closure is held with relation to the body by locking faces extending in a direction parallel with the focal axis of the reflector; to provide novel latching means between the closure and the body normally in obstructing relation and arranged to be I automatically moved out of obstructing relation so as to place the closure in rotative relation with the body, and to be automatically pressed into obstructing relation for preventing unclamping rotation between the closure and the body, when the closure is seated; and, further, to provide means whereby the closure is drawn toward the body of the lamp in lines substantially parallel to thefocal axis of the reflector by rotative movement between the closure and body, and latching means between the closure and the body automatically movable in a direction substantially radial to said rotative movement, whereby rotation of the closure in reverse direction is prevented.

The invention will be further readily understood from the f following description and claims, and from the drawings, in which latter Figure 1 vii-i a horizontal cross-section of my improved device, taken in the plane of the line 1-1 of Fig. 4., but with the closure .in position about to engage the latch.

Fig. 2 is a similar view, partly broken .received.

away, with the closure engaging the end of the latch, the latch shown in withdrawn position.

Fig. 3 is a similar .view with the closure rotated and the latch in engaged relation.

Fig. 4 is a front elevation of my improved device with the parts partly broken away and the latch shown in the relation illustrated in Fig. 2.

Fig. 5 is a similar view with the latch in the relation illustrated in Fig. 3.

Fig. 6 is a longitudinal section taken in the plane of the line 66 of Fig. 3, and

The body of the lamp is represented at i 11. It is exemplified as having an inwardly extending annular flange 12 bent inwardly from a substantially cylindrical portion 13. at the forward end of the body of the lamp, an annular space 14 being in rear of the The body is shown of parabolic form, merging into an outwardly flaring annular portion 15 at its forward end.

A reflector, shown of parabolic form, is exemplified at 18. The reflector is received in the cavity of the body and has an opening 19 at its front end. The reflector, in the form shown, is provided at its forward end with a laterally outwardly extending annular flange 20, extending laterally from a forwardly extending annular bulge 21, which at its apex is provided with an annular groove 22, in which an annular cushionmember 23, shown in the form of a cord, is The annular cushion member may be a cord, fabric, or rubber annularly arranged to coact with the closure for exeluding dust, water, or foreign substances from the inside of the reflector.

The closure of the lamp is represented at 25, serving as a door. It is exemplified as tion comprises an outer wall 29 and an inner wall 30. The outer Wall comprises an inwardly extending annular portion 31 against which the outer face of the glass 27 is arranged to be received. The inner wall is shown formed with a radially extending ledge 32, which is an annular ledge.

A suitable illuminating device, shown as an electric incandescent lampbulb 36, is

provided and is shown'releasably attached to a suitable socket 37, held in a thimble 38 at the rear end of the reflector, or the socket may, if desired, have a suitable focusing arrangement connected therewith as exemplified more fully in said aforementioned patent.

Retaining means are provided for the closure, exemplified as extending between the body and closure for limiting movement between said body and closure when in connected relation indirections substantially parallel to the principal axis of the reflector.

These means are exemplified as hooks 41 secured to the flange 12, being preferably spring-hooks, in the present instance respectively comprising a base 42 which at a point preferably intermediate of its ends is secured to the rear face of the flange 12 by a tension-member, shown as a screw 43, passing through the flange and received in a threaded socket 44 in the base. The hook further comprises a shank 45 bent preferably at substantial right angles to the base and having a bend 46 between the base and shank forming a spring. The finger 47 of the hook extends from the shank in the general direction of the flange and is shown curved to correspond substantiallyto the curvature of the annular flange. It is provided with a sloping contact-face 48. The hook is preferably formed of steel and tempered so as to form a spring-hook. There is a series of these hooks arranged about the flange, three hooks being exemplified equal distances apart.

Means are also exemplified for resiliently positioningthe reflector with relation to the body, shown accomplished by springs 51 placed preferably at the respective hooks and exemplified as leaf-springs. These springs are shown provided respectively with slots 52 through which the shanks of the hooks project, and with positioning lips 53 received in holes 54 in the flange 12.

The annular flange 20 of the reflector is shown as provided with slots 55 to register with the hooks, the finger-ends of the hooks being received through said slots, the slots extending preferably in the general direc tion of the annular flange'20, being shown curved to correspond substantially to the curvature of said annular flange. The flange 20 is provided with a rearwardly extending knob 56 arranged to be received in one of the slots 52 of the sprin s 51 for preventing unintentional turning 0% the reflector.

The radially extending ledge 32 of the closure is exemplified as provided with slots 58 in which the outer ends of the hooks 41 are arranged to be received, being received, in the present exemplification, into the cavity 59 between the walls of the ring-member. The slots 58 extend in the general direction of the ledge and are curved 'to correspond substantially to the curvature of the ring-member.

The closure or door is assembled with the body and reflector by means of a rotary movement, and means are provided for maintaining the rotative relation between the body or reflector and the closure, which are automatically yieldable by movement of the closure toward the body in the general direction of the principal axis of the reflector when connecting the closure with the body, and are arranged to be automatically positioned in looking relation when proper rotative movement has been had between the closure and body for locking the closure to the body.

I have exemplified this latch as on the body at 61, normally pressed outwardly by means of a spring 62 and having an inclined contact-face 63 arranged to be contacted by the rear annular edge 64 of the closure for pushing the latch inwardly when assembling the closure on the body. The latch is ar ranged to be pressed inwardly by means of a knob 65 when releasing the closure. The latch is received through an opening 66 in the cylindrical portion 13 of the body and is arranged to be automatically received in a recess 67, forming a keeper in the wall 30 of the closure. The spring 62 is located in the annular space 14 of the body. The latch is shown formed by bending the metal of the spring band, forming front and rear stretches, the lateral walls 68, which coact with the end walls 70, of the opening 66, and with theend walls 7 2, of the recess 67, forming end-faces between the latch and the walls of the opening and recess, which extend in planes substantially parallel to the principal axis of the reflector, so that when the latch is-in latching position rotative movement of the closure for releasing the same will be prevented by a face which extends substantially at right angles to the rotative movement of the closure.

The spring 62 is exemplified as a bowed leaf-spring, one end of which is secured to the flange 12 of the body, as by means of a screw 75 received through an opening in the flange and having threaded engagement with a threaded lug 76 fast to the sprlng.

The knob 65 is received through an opening 77 in the body normally closed by the knob and a nut 82, the washer being between the spring and shoulder.

The wall 30 of the closure preferably has a shoulder 83 in annular arrangement thereabout and arranged to coact with the annular outer edge 84: of the body for forming a stop between the closure and body, so that the closure may be held tightly toward the body and vibration between the closure and body prevented by reason of coaction between the stops.

In assembling the closure upon the body, the closure is placed in central position in front of the body, so that the peripheral edge of the closure is presented to the inclined face of the latch, as exemplified in Fig.1. Upon pressure of the closure toward the, body, the inner annular edge of the closure will contact saidinclined face and movement of said edge therealong in the general direction of the principal axis of the reflector will cause recession of the latch and engagement of its outer end with the annular inner wall 30 of the closure. (See Fig. 2). This movement of the closure will cause the slots therein to be received about the hooks, it being assumed that the reflector has been positioned under the fingers of the hooks.

Rotative movement is thereupon applied to the closure. This movement will cause the end walls 87 of the slots 58 to impinge the slanting contact-faces 48 of the fingers 47 and thereby draw the closure toward the body until firm contact is made between the stops 83, 84, the rotation of the closure being continued so as to cause the resilience of the spring hooks to act, the said ends 87 of said slots climbing upon said inclined contact faces 48. When proper seating of the door has been com leted, the recess 67 in the wall 30 of the c osure will have reached the latch, which thereupon is automatically forced outwardly by the spring 62, (see Figs. 3 and 5), for preventmg retrograde movement of the closure during the travel of the vehicle and in spite of any vibration or jarring which the'headlight may receive in use. The assembling of the headlight isaccomplished without manipulation of the latch.

If it is desired to release the closure it is necessary only to press upon the knob for withdrawing the latch 61 from the recess 67.

On rotation of the door the outer end of the latch is maintained in contact with the inner wall 30 of the closure for preventing reengagement between the closure and latch to permit complete removal of the closure.

In my improved construction the closure is readily applied to the body without manual actuation of any latch, the'latch automatically operating to retract and also to engage, and in releasing the closure it is necessary only 'to actuate the knob for momentarily releasing the latch, whereupon the closure may be'removed Without further attention given the latch.

Having thus fully described my invention, What I claim as new and desire to Letters Patent, is: I

1. In a lamp, the combination of a body, a reflector, a closure, means between said body and closure for causing relative approach between said closure and body parallel to the line of the principal axis of the reflector, and a latch between said body and closure arranged for automatically receding by movement of said closure toward said body and automatically'moving into locking relation at the completion of said rotative movement between said closure and body.

2. In a lamp, the combination of a body, a reflector, a closure, means between the body and closure for relative approach between the same by rotative movement of the closure, and a resilient latch and keeper therefor between'the body and closure comprising a slanting contact-face slanting relative to the line of approach between said body and closure for automatic Withdrawal of said latch by contact thereof,- said latch automatically coacting with ,said keeper on completion of said rotative movement, and manual means for withdrawing said latch.

3. In a lamp, the combination of a body, a reflector and a closure, means between said closure and body for causing relative approach between said closure and body byrotative'movement of said closure, and alatch on said body, said closure provided with a recess for said latch, said latch provi ded with an inclined face contacted by said closure, said recess bein out of rangeof said latch on contact thereo by said closure, and said recess brought into range of said latch by said rotative movement of said closure, said recess and latch havin walls between .them extending substantial y parallel with the radial lines of said reflector at said latch.

In testimony whereof, I have hereunto signed my name in thepresence of two subscribing witnesses.

EUGENE A. KUEN.

Witnesses v THERESA M. Srmmn, Dawson E. BRADLEY.

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