US2360396A - Fluorescent tube changer - Google Patents

Description

Oct. 17, 1944.,

W. G. CARNEY FLUORESCENT TUBE CHANGER 3 Sheets-Sheet 1 Filed May 6, 1944 W/u/AM C M/5y B) Y and W M521 Oct. 17, 1944. w. CARNEY 2,360,396

FLUORESCENT TUBE CHANGER Filed May 6, 1944 3 Sheets-Sheet 2 QM WW W G CARNEY FLUORESCENT TUBE CHANGER Flled May 6 1944 Oct. 17, 1944.

Patented Oct. 17, 1944 UNITED STATES PATENT OFFICE.

2,360,396 FLUORESCENT TUBE CHANGER William G. Carney, South Bend, Ind. Application May 6, 1944, Serial No. 534,391

. 6 Claims.

This invention relates to a novel and improved fluorescent tube changer, that is, a device which is expressly constructed and specifically designed to enable the user thereof to either install or remove a tube.

As is generally well known, a rotary or oscillatory motion of the tube in relation to the end supporting fixtures or brackets is necessary for exchange purposes. Therefore, I have evolved and produced a simple and expedient tube embracing and clamping device, this supported-on a reach pole to permit long range usage from the floor without necessitating the use of a ladder.

More specifically, the preferred embodiment of the invention is characterized by a frame structure supported on the remote end of the reach pole, said frame structure being provided with retention and assembling tracks for accommodation of a triple cord controlled clamping unit,- the latter including a hinged jaw or grip which is suflicient to hold the tube in the clamping unit and to permit said tube to be rotated to the desired degree for removing or replacing, as the case may be.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the same:

Figure l is an elevational view of the fluorescent tube-changer as constructed in accordance with the principles of the present invention observing one face or side of the same.

Figure 2 is a top plan view of the structure seen in Figure 1.

Figure 3 is a side elevation like Figure 1 but observing the opposite side, that is the side opposite to that seen in Figure 1.

Figure 4 is an end elevational view of the structure.

Figure 5 is a central longitudinal sectional view taken approximately on the plane of the line 5--5 of Figure 2, looking in the direction of the arrows.

Figure 6 is a transverse vertical section on the line 66 of Figure 1.

The frame structure is denoted, as a unit, by the numeral 1 and the fluorescent tube gripping and clamping device or unit is indicated at 8.

The frame comprises a horizontal bar or equivalent part 9 having a centrall disposed socket It) to accommodate the removable reach-rod or pole ll. Substantially horseshoe-shaped end frames l2 of duplicate construction are secured by appropriate fastenings l3 to the ends of the frame bar 9, the frame members being at right angles thereto. The inner marginal edge portions of the respective end frames are provided With substantially semi-circular elements I 4 which are grooved to provide keeper and assembling tracks for the oscillatory tube clamping unit 8.

The last-named part 8 is of approximate semicircular cross-sectional form and includes a main sector 15 and a complemental relatively swingable leaf or sector l6 The parts l5 and iii are hinged together by appropriate hinge means IT. A suitable bracket l8 on the sector I5 is provided with a depending pull-cord 19. This cord I9 serves to shift or oscillate the cradling and clamping unit 8 in one direction, that is, the direction from left to right in Figure 4. A companion pull-cord 20 is on the opposite side and is connected with a bracket 2! mounted on the hinged section l6. It will be noticed that the cord l9, which is attached to the bracket on the left (see Figure 4) passes between the bar 9 and theadjacent portion of .the oscillatory or shiftable unit 8. The free end hangs down alongside of the reach pole I I. On the other hand the cord 20, which is attached to the bracket 2| on the hinged clamping leaf or plate I6 passes in the opposite direction, that is in between the bar 9 and the unit 8 and this hangs down along the opposite side of thereach pole H. Thus, when it is desired to shift the unit'8 from the full line position (seerFigure 6) to the dotted line position (see Figure 4) the cord I9 is grasped and pulled down. It follows that the cord 20, pulled in the opposite direction serves to return the parts to their normal full line positions.

I now direct attention to a third cord 22 which also hangs down and is attached at its upper end to a bracket 23 on the upper median portion of the hinged clamping leaf IS. The purpose of this cord is to actuate the part l6 which then functions as a clamping jaw, as is obvious. Coacting with this pull cord are flat leaf springs 24, which springs are secured at one end to the stationary part l5 and bridge the hinged joint and have their free ends pressing against the median area of the clamping leaf or section [8.

When the cord I9 is pulled upon and the entire unit is rocked around to the position seen in Figure 4, the springs 24 press the clamping leaf l6 against the tube. In order to release this leaf or jaw, as it may be called, the cord 22 is pulled. This alternate operation of the jaw leaf I6 is shown in full and dotted line positions in Figure 4.

Under normal circumstances the sectional clamping unit 8 occupies the full line position in the tracks id as shown. That is to say, the open top is normally positioned so that unit 8 constitutes a suitable receptacle which may be placed in a position to embrace the fluorescent tube A. The device is, of course, placed in position by the user standing on the floor and employing the reach-pole ll somewhat in the manner of similarly functioning electric bulb "snatching and changing devices. With the device well up and around the fluorescent tube as shown for example in Figure 6, the user catches hold of the depending cord l9 and exerts a downward pull thereon. This shifts or oscillates the entire unit 8 in a direction from left to right. At a certain point of rotation the spring-pressed hinged section l6 projects outwardly beyond the adjacent end of the track, whereupon the spring means comes into play to break the hinge joint and to force the section I'B against the fluorescent tube. The tube is thus bound between this part which then acts as a jaw, and the seating or receptacle portion 15. The two parts together clamp the tube with suflicient of a grip to turn it to a degree to either detach it from the supporting fixtures (not shown) or to replace it in the fixtures. In practice, I have found it expedient and practicable to provide the sections I and IS with appropriate felt ,or equivalent linings and these facilitate obtaining the desired frictional gripping action.

Thus, and briefly, we have a reach-pole and a frame structure on the reach-pole and the clamping device which is shiftably mounted in the frame structure, the clamping device being so constructed'as to embrace and receive the fluorescent tube. Hence and by appropriatehandling the user can apply and remove tubes which would otherwise be inaccessible even if a ladder were handy. A structure of this type is useful in offices, factories and other places of business using elevated ceiling type fluorescent tubes.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in'the shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

Having described the invention, as new is:

1. In a fluorescent tube-changer of the class described, a reach-pole, a frame structure including a substantially semi-circular receptacle unit for the reception of a conventional fluorescent tube attached to the upper maneuverable end thereof, and clamping means including a hinged portion of said receptacle mounted in said frame, and means including successively actuated control cords to actuate said clamping means.

2. In a fluorescent tube-changer of the class described, a substantially semi-circular receptacle unit for reception of a conventional fluorescent tube, said receptacle comprising a main relatively stationary part and an auxiliary hinged part, and supporting and operating means for said receptacle.

3. A fluorescent tube-changer of the class described comprising a reach-pole, a frame structure on the upper end thereof, an oscillatory clamping device including a substantially semicircular receptacle having a hinged portion adapted to encircle a fluorescent tube in said frame structure, and pull-cords attached to said clamping device for shifting it into and out of functioning positions.

4. In a fluorescent tube-changer of the class described, a reach-pole, a frame structure thereon including a pair of parallel end frames having semi-circular tracks, and a substantially semi-circular fluorescent tube embracing and clamping device shiftably mounted in said tracks.

5. In a fluorescent tube-changer of the class described, a reach-pole, a frame structure thereon including a pair of parallel end frames having semi-circular tracks, and a substantially semi-circular fluorescent tube embracing and clamping device shiftably mounted in said tracks, and cords for operating said device.

6. In a fluorescent tube-changer of the class described, a reach-pole, a frame structure thereon including a pair of parallel end frames having semi-circular tracks, and a substantially semicircular fluorescent tube embracing and clamping device shiftably mounted in said tracks, and cords for operating said device, said device comprising a stationary section and a hinged section carried thereby, and spring means engaging the hinged section to permit it to function in the manner and for th purposes described. a WILLIAM vG. 'CARNEY.

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