US 1910542 A
Description (OCR text may contain errors)
y 1933- L. E. HENDEE REFLECTOR ATTACHING STRUCTURE FOR LAMPS Filed Oct. 16, 1929 Ziwwmtoz %m $77 aaa Patented May 23, 193?;
UNETED STATES PATENT OFFIQE LEM E. HENDEE, OF MILWAUKEE, WISCONSIN, ASSIGN'OR TO LINE IVIA'll-liRIAIL. COM-*- IE'ANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF DELAVIARE- REFLECTOR ATTACHING swans-roan ron LAMPS This invention relates to reflector attaching structures for lamps.
Objects of this invention are to provide a novel form of reflector attaching structure for lamps which is so constructed that the reflector may be very readily attached or detached from the body portion, which is provided with means for preventing inadvertent detachment of the reflector, and to which requires no tools whatsoever for either attaching or detaching the reflector.
Further objects are to provide a reflector attaching structure which is equipped with means for preventing rattling of the reflector even when the device is subjected to severe jars, which yielding holds the re flector in its correct position centrally of the body portion to which the reflector is attached, and which positively locks the re- 2o flector to the body portion so that it cannot be detached without first withdrawing a latching member.
Further objects are to provide a lamp receiving structure in which wire receiving members or terminals are carried by an insulating body portion, in which the reflector is provided with cut-outs to adequately clear the terminals and in which means are provided for preventing the insertion of the reflector in any but one predetermined manner so as to secure proper alignment of the cut-out portions with the terminal members. In greater detail, objects of this invention are to provide a structure in which bayonet v slots interlock with projecting pins and in which additional means are provided which prevent relative rotation of the reflector with reference to the body portion, so that the bayonet slot and pin engagement cannot be disturbed without first adjusting the looking means in a predetermined position.
Further objects are to provide a construe tion which is so made that an unskilled laborer may easily attach or remove the re fiector, in which adequate protection is afforded all live parts of the lamp receiving body portion and in which, although a metal reflector may be used, nevertheless there is no possible chance of short-circuiting or grounding the terminal members or causing the drawing, four are used.
contact between the metal reflector and the terminal members.
An embodiment of the invention is shown in the accompanying drawing, in which Figure 1 is a side elevation of the structure, with the major portion thereof in section.
Figure 2 is a sectional view on the line 22 of Figure 1, with parts broken away.
Figure 3 is an enlarged sectional view on the line 33 of Figure 2.
Referring to the drawing, it will be seen that a body portion 1 of porcelain is provided for carrying the reflector 2. This porcelain body portion is carried in any suitwith yielding contact strips or fingers 6 between which the prongs of the lamp may be inserted. The contact strips 6 are connected to wire receiving members or terminals 7 as shown in Figures 1 and 2.
The lower cylindrical portion 4.- of the body portion is provided with spaced cut-outs or recesses 8 which receive the outer arms 9 of U-shaped spring clips or spring members. These spring clips or members are provided with inner arms 10, which are preferably slightly curved, as shown in Figures 2 and 3. The inner arms 10 bear directly against the cylindrical or shank portion 5 of the reflector when the reflector is forced upwardly into position.
Any number of U-shaped spring members may be employed. In the form shown in I I Three of these U-shaped members or spring clips are held in place by means of bolts or screws 11 provided with clamping nuts 12. The remaining spring clip is held in place by means of a nut 13 screwed upon the threaded reduced tubular shank of a fitting 14, as shown in Figure 8. It is to be noted that each of the arms 9 and 10 of the U-shaped spring members are apertured so that the bolts 11 pass beyond the innermost arm 10. In addition to this a plunger 15 is provided in con junction with the tubular fitting 14, and this plunger, under normal conditions, projects through the aperture in the arm 10 of the corresponding U-shaped spring member.
The tubular fitting 14 is provided with a recessed portion which receives the compression spring 16. One end of this spring bears against the plunger head 15 and the other end bears against an outer shoulder at the end of the recess. The plunger 15 has a reduced shank which is threaded into or otherwise attached to a manipulating thumb piece 17. This thumb piece is provided with a rectangular portion 18 which fits within a correspondingly notched portion of the fitting 14, as shown in Figures 1 and 2. When it is desired to retract the plunger, the thumb piece 17 is pulled outwardly and thereafter rotated a quarter of a turn, so that the rectangular portion 18 thereof bears against the outer face of the fitting 14 and holds the plunger 15 in its retracted position.
The shank 5 of the reflector is provided with a hole 19 into which the plunger is adapted to pass when the plunger is released and allowed to move inwardly under the influence of the spring 16. This reflector shank is also provided with a plurality of bayonet slots 20 which interlock with the inwardly projecting ends of the bolts or pins 11, If desired, the inner end of the shank 5 of the reflector may be provided with a small inturned flange to give additional rigidity to the structure.
In positioning the reflector within the body portion, the following steps are followed: The plunger 15 is locked in its retracted position and the reflector is pushed upwardly until the inner ends of the bolts or pins 11 pass into the vertical portion of the bayonet slots 20. Thereafter the reflector is given a slight rotary motion with respect to the body portion, thus causing the pins or bolts 1.1 to interlock with the reflector by passing into the horizontal or lateral portion of the bayonet slots. When the reflector is in this position, the hole 19 aligns with the plunger 15 and the thumb piece may be turned so that its rectangular portion 18 slips into the corresponding cut-out in the fitting 14 and assumes the position shown in Figure 3, thereby permitting the plunger 15 to enter the hole 19. The plunger 15 therefore locks the reflector against rotary motion with respect to the body portion 1 and therefore holds all of the pins 11 in their interlocking position in the bayonet slots 20.
It is to be noted that the inner arms 10 of the U-shaped spring members are relatively stiff due to their curved shape, but
nevertheless they will yield sufliciently to permit the insertion of the shank 5 of the reflector. They exert, however, considerable pressure against the outer side of the shank 5 of the reflector and thus hold the reflector by providing cut-outs or recesses 21 in the shank 5 of the reflector. These recesses register with the terminal members when the reflector is positioned and locked in place. The reflector cannot come in contact with the terminal members, for if it is attempted to insert the reflector in a position so that the cut-outs 21 therein will not register with the terminal member 7, the upper edge of the shank 5 will engage the pins or bolts 11 and prevent insertion of the re flector. The reflector can go into place only in one position, as previously described, due to the fact that the opening 19, see Figure 3, has no slot connecting it with the upper edge of the shank 5 of the reflector.
It is therefore clear that the reflector can be inserted in only a predetermined position. It is to be noted also that the construction is extremely simple and does not require any disfiguring external means for the attachment of the reflector to the body portion.
It is to be noted also that no tools are required in attaching or detaching the reflector.
It is to be distinctly understood that other locking means than the spring pressed plunger 15 may be employed. Obviously this plunger can be any other type of spring pressed member, or may, in fact, be of the screw type, provided only that means are provided for projecting the plunger inwardly and withdrawing the plunger outwardly.
It is also obvious that other changes may be made in the precise embodiment shown in the drawing and described in detail without departing from the spirit of this invention.
Therefore, although this invention has been described in considerable detail, it is to be understood that such description is intended as illustrative rather than limiting,
as the invention may be variously embodied and is to be interpreted as claimed.
1 1. A lamp receivlng structure comprising a body portion adapted to receive a lamp and having electrical terminal members, said body portion having a downwardly projecting flange, a reflector adapted-to approximately fit said flange, said reflector and said flange having interengaging portions, said reflector having notches formed there in adapted to approximately register with said electrical terminal members, said reflector having an opening independent of said interengaging portions of said flange and reflector, and means carried by said body portion and adapted to enter said opening to prevent inadvertent positioning of said reflector in any position otherthan that producing approximate registration of the said notches with the said electrical terminal members.
2. A lamp receiving structure comprising a body portion provided with a downwardly projecting flange, inwardly projecting pins carried by said flange, a plurality of antirattle spring members carried by said flange and tending to move inwardly, and a reflector provided with bayonet slots adapted to interlock with said pins, said reflector having a portion for engaging said spring members.
3. A lamp receiving structure comprising a body portion provided with a downwardly projecting flange, inwardly projecting pins carried by said flange, a plurality of spring members carried by said flange and tending to move inwardly, a reflector provided with bayonet slots adapted to interlock with said pins, said reflector having a portion for en gaging said spring members, and a movable plunger carried by said body portion, said reflector having a hole, independent of said slots, adapted to receive said plunger, whereby said reflector is locked in position and detachment of the pins from the bayonet slots is prevented.
4. A lamp receiving structure comprising a body portion having a downwardly projecting flange, a plurality of U-shaped spring members carried by said flange and having arms located inwardly of said flange and tending to move towards the center of said flange, a plurality of inwardly projecting pins carried by said flange, a reflector having bayonet slots adapted to interlock with said pins and having a hole, and a movable plunger carried by said flange and adapted to enter said hole to lock said reflector against rotary motion with respect to said flange, said reflector engaging the arms of said U-shaped spring members when said reflector is in position with respect to said body portion.
5. A lamp receiving structure comprising a body portion provided with a downwardly projecting flange, a plurality of U-shaped spring members having arms positioned inwardly of said flange, a plurality of bolts for locking said spring members to said flange, said bolts having inner ends projecting inwardly of said flange, a reflector having a shank adapted to enter said flange and engage said spring members, said shank having bayonet slots for the reception of the LEM E. HENDEE.