US 1570759 A
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Description (OCR text may contain errors)
Jan. 26 1926. 1,570,759
M. M. MARKS LIGHTING FIXTURE Filed Feb. 25, 1925 Patented Jan. 26, 1926.
' MYER M- MARKS, 'OFCHICAGO, ILLINOIS.
LIGHTING IIIX'LURIEII Application filed February 25, 1925*. Serial No. 11,480.
To all whom it may concern:
Be it known that I, MYnn M. MARKS, a citizen ofthe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Lighting Fixtures, of which the following is a specification.
My invention relates to shade holders, and the object is to provide a holder which shall be simple; in construction, economical to manufacture, simple to operate, and efficient in looking the shade in place.
I obtain this object by the mechanism il lustrated in the accompanying drawings in which Figure 1 is a general assembly view, the canopy .being shown in diametralvertical section.
Figure 2 is a bottom plan view taken on the line 22 Figure '1. v V
Figure 3 is a plan section'on the line 33 Figure 1. e 1
Figure 4c is a vertical section'on the line l4 Figure 1.
Figure 5 is a fragmentary view illustrating the formation of the shade, supporting arms at the points where they are engaged by theoperating member.
Like numerals denote like parts throughouttho several views.
According to the illustrated design the canopy 1 is in practice suspended upon a conduit 2 or other suitable type of support. lVithin the canopy are arms 4 for supporting the shade 6. The shade is of the type which is open at the top and has a rim which is intended to come within the lower cylindrical flange 8 of the canopy.
The arms are pivotally suspended from their upper end and preferably from a point near the upper end of the canopy. lVhile the form of support may be greatly varied, I have illustrated a type in which a bracket 10 is soldered or otherwise secured to the wall of the canopy and is provided with bearings 12 located in line with each other a short distance apart. The arms 4, which may consist of a single piece of bent wire, are bifurcated at the upper end and each terminates in two horizontal branches 14: pivotally supported in bearings 12. This arrangement enables the arms to swing readily in vertical radial planes and at the same time prevents side swing.
The arms 4 project outward at the bottom, having in the pre ent instance loops 16 which engage the inner portion of the upper rim'of the shade and are extended circumferentially to afford a firm bearing surface for the shade.
The arms areoperated by a rotatable operating member 1-8shown in bottom plan in Figure 2. This rotatable member is open at the center for accommodating the electric lamp (not shown). By preference it is formed of wire having a radially projecting arm 20 formed at one pointand a similar arm 22 formed at a diametrically opposite point to constitute axes on which the member is-rotatable. These arms are journaled in the sides of the canopy. A handle 24 of any suitable form is secured to the arm 22=for enabling the operator to rotate the operating member. ft'will be observed that this operating member is rotatable about a horizontal axis and is located approximately mid-height 0f the arms, thus causing the arms to function as levers of the third class. lVhen the operating member is approximately in horizontal position, that is, when it lies approximately in a horizontal plane, it backs up the arms, holding them in outward acting position. Recesses 26 are formed on the inner side of the arm on a level with the axis of the operating member 18. These are for receiving the operating member when the latter is horizontal, the effectbeing to lock the armsin acting position; Shallow shoulders 28 are formed on the entering side of the recess and steeper shoulders 30 on theopposite side of the recess, the shallow shoulders serving to yieldingly prevent accidental rotation of the operating member to unlocking position and the steeper shoulders serving as stops to prevent the operating member from rotating past the horizontal. This formation is illustrated in detail, in Figure 5.
In operation, when the operating member 18 is rotated to non-acting position shown in dotted lines in Figure 1 the arms automatically swing inward due to the distribution of their weight and the factthat they are freely suspended at the top. This characteristic is not essential, for the inward motion would follow as a result of the weight of the shade, at least for the purposes of releasing the shade, but is of advantage in that it enables the shade to be brought up into position in the shade holder without special manipulation of the supportingarm, When the shade has been rought up into position as indicated in Figure 1 the operating member is rotated to horizontal position shown in full lines in Figure 1. This causes the operating member to slide over the shoulders 28 into the recesses 26 whereupon the arms will become locked in acting position. The arms cannot become unlocked by the mere weight of the shade, nor can they become unlocked as a result of vibration or ordinary accident to the operating mem her. The operating member itself is yieldingly locked in position, but a reasonable torque applied to it through handle 2-1 will unlock it and release the arm.
It will be evident that my device is simple and inexpensive, especially when designed in the manner illustrated where the supporting arms are simply bent pieces of wire and the operating member is formed of the same material. The operating parts are all enclosed within the canopy and securely hold the shade when in locked position.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
l. A shade holder in the form of a canopy, arms pivotally supported at their upper end near the upper portion of the shade holder, said arms projecting outward at the bottom for underlying the upper rim of the shade when the arms are swung outward, and for releasing the shade when swung inward, and arotary member mounted on the shadeholder for backing up the arms and holding them in acting position, said rotary member being located within the shade holder and being rotatable about ahorizontal axis.
2. A shade holder having a canopy, arms suspended therein and swingable in a vertical plane, the arms projecting outward at the bottom for descending into the upper opening of the shade and engaging its upper rim when the arms are swung outward, and a member for actuating the arms, said member being located between the arms within the canopy and being rotatable about a horizontal axis, and when in an approxi mately horizontal position backing up the arms to hold them in acting position.
3. A shade holder having a canopy, arms each suspended therein from its upper end and swing-able in a vertical plane, said arms projecting outward at the bottom for clescending into the upper openingof the shade and engaging the upper rim when the arms are swung outward, and a rotary operating member mounted on a horizontal axis within shade holder for backing up and releasing the arms when rotated to different positions, said operating member being at an elevation to engage the arms between their ends whereby the arms function as levers of the third class.
4. A shade holder having a canopy, arms within the canopy suspended from their upper end and swingable in radial vertical planes, the arms projecting outward at the bottom for engaging the inside of the upper rim of an open top shade, the arms being slightly recessed on the inner side, and a rotary operating member mounted on a hori zontal axis within the shade holder for backing up and releasing the arms when rotated to different positions, said operating member when in approximately horizontal position seating in the recesses in the arms for holding them locked against inward movement and for yieldingly opposing rotation of the operating member in a direction to release the arms.
In witness whereof, I have hereunto subscribed my name.
MYER M. MARK?