US 1601877 A
Description (OCR text may contain errors)
Oct. 5 1926. 1,601,877
R. L. NILSSON ET AL ELECTRIC GLOBE REMovER Filed June 9, 1923 2 Sheets-Sheet 1.
Oct. 5 1926.
A R. L. NILSSON ET AL ELECTRI C GLOBE REMOVER Filed June 9, 1925 2 Sheets-Sheet 2 //////llll Il l l l I ll l\ l\ Patented @et 5, 1926.
RAGN'AR L. NILSSON V.ANDELVYNv C. CieEIi, 0F MNNAGIS, MINNESOTA.
Application filed 'June 9,
This invention relates to improvement in implements ior inserting and extracting electric Vlight bulbs, and moreV particularly to a mechanically operated device which will be especially adapted for use in substituting new bulbs for .burned out ones in large electric signs.
@ne of the objects of the invention is to provide an implement of this character which may be employed to hold a bulb and which can be quickly operated to clutch the bulb so that it will be screwed into the electric socket, and which may be just as easily operated to extract the bulb from the soclret.
@ther objects of the invention will appear upon consideration of the Jfollowing detailed description and accompanying drawings, wherein:
Figure 1 is a side elevation of the device constructed in accordance with our inven-y Figure 2 is a plan view oi the bulb grip ping portion. i A
Figure 3 is a cross section taken on the line 3 3 of Figure 1. n
Figure 4 is a detailed sectional View showing a modified arrangement of the mechanism.
Figure 5 is a detailed view of one of the bulb gripping elements.
Figure 6 is a side view of an attachment for use in extracting the bases of brclren bulbs from electric light sockets, and
Figure 7 is a plan View of the same.
Referring to the drawings by numerals, the pole 1 may be of any desired length and has its upper end provided with a bevelled gear 2 rigidly fixed to the pole so that it may turn when the pole is turned. An elongated pintle 3 is formed by an extension on the end of the pole beyond the gear 2 and this pintle is adapted to receive a sleeve 4 which is provided with an angular extension 5 carrying an angular pintle 6. The upper end of the pintle 3 extends up wardly beyond the upper end of the sleeve 4rand is adapted to receive a beveled gear 7 which is fastened to the pintle by a movable locking pin 8 as shown in Figure 4.
The hub 9 of the gear 7 is provided with ears carrying pivot pins for pivotally receiving the arms 10 which extend radially from the hub of the gear as shown in Figure 3 of the drawings. These arms 10 are each provided with a gripping inger 11 which is shaped to fit the electric light bulb 19523. Serial No.' 644,437.
and is provided with suitable pads 12 at the` permit the same to engage electric llight bulbs oi different sizes.` A thumb. nut llais carried by each iinger for clamping the same in the desired position on the arm upon which the finger is mounted. l Near their pivoted ends, the arms 10 are provided with slots 13 through which the pins 14 are extended and coil springs 15 are interposed between the gear 7 and the arms 10 and surround the pins 14 as shown to exert a spring pressure on the arms whereby the lingers 11 will effectively grip the electric light bulb. A stop pin 111-EL is passed through the free end of each pin 14 to limit the inward movement of the iingers so as to permit said fingers to be readily slipped over an electric light bulb.
When the parts are assembled in the position above described, it will be obvious that a turning movement imparted to the pole 1 will be transmitted to the gear 7, and since this gear is connected to they arms 10 which carry the fingers 11, a turning movement will 'be imparted to the bulb so that it may be either inserted or extracted. This arrangement is effectively employed for inserting and'extracting bulbs in ceiling fixtures.
When the device is to be used as illust-rated ip Figure 1, the gear 7 will be removed from t ie that the teeth of the gear 7 will mesh with the teeth of the gear 2. In this arrangement, the gear 7 isnot keyed to the pintle 6 but is free torotate thereon, and since the arms 10 and fingers 11 are carried by the gear 7, it will be obvious that rotary motion imparted to the bulb will be transmitted to the gears, thus causing the turning motion necessaryT for inserting and extractingthe bulbs.
For opening and closing the gripping lingers 11 a flexible cord 17 is provided which has one end fixed to one of the arms 10 so that a pull on the cord or wire 17 will cause one of the arms 10 to swing' on its pivot and open the gripping iingers 11.
The attachment shown in Figures 6 and 7 of the drawings comprises a triangular base ring 20 and three gripping fingers 21 attached to the corners of the ring 2O and arv ranged to form connecting pins 22 adapted to be received 1n conveniently arranged openpintle 3 and placed on the pintle 6 sov lll) ings 23 in the fingers 11. The upper ends of the fingers 2l are coneeted to rubber gripping members 24 which are adapted to engage the inside of the base of ay broken bulb whereby the same may be turned and eX- traeted from the socket.
Vhat We claim is:
1. A bulb inserting and removing imple"- ment comprising a pole having a pintle fixed at its end, a gear Wheel fixed to the pole at the inner end of the pintlej a sleeve loosely mounted upon the fixed pintle and having' an angularly disposed pintle, a second gear Wheel transferable from one pintle to the other and adapt-ed to mesh Wit-h the first mentioned gear Wheel When applied to the sleeve pintle, bulb gripping` fingers Carried by the second mentioned gear Wheel7 and means extending along the pole for spreading the fm Y gers with relation to eaeh other.
the arms and bulb gripping fingers carried y the arms.
In testimony whereof, We aiiixed our natures.
RAGNAR L. NLSSON. ELVYN C. CHMEL,