US1763495A - Adjustable mounting for electric bulbs - Google Patents

Description

June i0, 1930. w, B, YQUNG ADJUSTABLE MOUNTING FOR ELECTRIC BULBS Filed Jan. 2l, 1929 INVENTOR ATTORNEY Patented .lune 10, 1930 UNITED STATES PATENT OFFICE WILLIAM YOUNG, P'ULASKI, VIRGINIA ADJUSTABLEPMOUNTING FOR ELECTRIC BULBS Application led January 21, 1929. Serial No. 333,917.

whereby one'or more Yelectric bulb sockets can be easily adjusted on a supporting mem-`- ber so that `the lamps or bulbs can be placed in any desired 'position on thelsupporting member, vthus eliminating the use of a plurality of stationary sockets and their connections for enabling the lamps or bulbs to be placed in different positions on the supporting member. f

I Another object of the invention is to provide simple means for locking the socket or sockets in adjusted position and at the same time bringing the contacts of the socket or sockets in firm engagement with a pair of conducting members so asto secure a good electrical connection between the parts.

This invention also u consists in certain other features of construction and in the combination and arrangement of thel several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claims. e

InA describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the. several views, and in which .Figure 1 isa transverse sectional view through the invention.

. Figure 2 is a fragmentary top plan view with parts broken away. p Figure 3 is an end view. Figure 4 is a sectional detail View show ing a plug inserted inthe end of the casing and engaging one of the conductor members with one of the rollers engaging said me1nber.

Figure 5 is a sectional detail view showing how a roller is electrically connected with l a conductor of the socket.

with a longitudinally extending slot 2 in A its indicates thecasing of the device which 'is-formed upper or outer part and 3 indicates a member of non-conducting material and of substantially T shape, with one portion thereof suitably connected with the base of the casing, such as making this port-ion of Wedge shape and providing the casing with the flanges 4 for engaging the wedge-shaped portion, as shown in Figure l. A conductor strip 5 is embeddedin-each end of the horizontal part 'of the member 3 and' each 'strip is so shaped as to provide a tubular part 6 which depends fromthe member 3 andl forms an electrical conductor. The ends of the casing are closed by the detachable plates 7 and`one of these plates is formed with holes to receive the plugs 8 which have their inner reduced portions fitting in the ends of the tubular parts 6 so that when these plugs are connected with a suitable source of supply, said tubular parts of the strips 5 will form parts of the positive and negative sides of the supply -line and current will flow through the strips when the twostrips are bridged, as will be hereinafter described. Each lamp socket 9 is attached to a tubularv stem 10 which passes through the slot 2andV the inner end of the stem is vformed with the tubular 'branches l1, these branches being of substantially U-shape so that they extend means of the plugs 16 inserted in the free ends of the branches and havingtheir reduced ends 17 entering sockets formed in the reduced ends 18 of the shafts.

Thel stem 10 is threaded, as shown at 10, and anut 19, having a handle 20, engages the stem. lA washer 21 is placedpn the stem' between/the nut and casing.,

Fromjhe foregoing-it will be seen that with the parts-arranged las shown in Figure the roller 1, by loosening the nut the socket 9, with the bulb therein, the stem and its branches can be moved lengthwise of the casing and that during this action, the rollers will roll over the tubular conductors 6. Vhen the socket has been moved `to the desired position, the nut is tightened, which will lock the socket and its associated parts in adjusted position .on the casing and at the same time so move the parts that the rollers Will firmly, press against the conductors 6. Thus current will pass from one of the conductors 6 through and shaft and the plug `16, through aconductor, 15 to the socket and bulb and return through the other conductor 15 through the other roller to the other conductor 6. Thus the socket and-its bulb can be readily adjusted to any desired position relative to the casing Without breaking the electrical connection.

This invention avoids the use Vof a plurality of stationary sockets for enabling lamps to be pro erly spaced or placed on a supporting mem r.

For instance, Figure 6 shows the invention used with a -sign A. pair of the devices is placed in the sign casing; as shown at B, With the lamps L adjusted so that they will come opposite the letters of the sign. Thus the lamps can be properly adjusted so that their rays of light will pass through the letters no matter how the letters are arranged on the slgn. i

It will, of course, be understood that the'inventioncan be used in various locations. For instance, it can be-used with a single lamp on a desk-so that the lamp can be moved to a position on the desk Where it will give the best light to the user.. Of course, more than one lamp can be used `on a desk. The invention can 'also be used for the footlights/in y theatres and the like and in show Windotvs,

-on the walls and ceilings ot' a room and 1n any other location where an adjustable mounting of electric lamps is desired.

It is thought from theforegoing description that the advantages and novel features of the invention will be Vreadily apparent.

It is to be understood that changes may be4 made in ythe construction and in the combination and arrangement of the several parts, provided, that such changes fall within the scope of the appended claims.

What I claim is 1. A device of the class described comprising a casing having a slot therein, .a pair of conductor members in the casing, a tubular stem passing through the slot and *having branches on its inner end vvith parts of the branchesengaging the conductor members, a bulb socket on the outer end of the stem and conductors leading from the socket and passto the socket from the conductor members .I

Ilongitudinally extending conducting members in the casing, a tubular stem passingthrough the slot and having branches on its inner end, rollers carried by the free ends of the branches engaging the conducting .members. a bulb socket on the outer end of the stem,9 conductors leading from thel socket through the stem and its branches and electrically connected with the rollers and means for holding the stem and its associated parts in adjusted position on the casing. I

3. A device of the' class described ,comprising a casing having a slot therein, a pair of longitudinally extending conducting members in the casing, a tubular stem passing through thevslot and havin branches on its inner end, rollers carried y the freeends of the branches vengaging thev conducting` members, a bulb socket on the outer end of the stem, conductors leading from the socket through the stem andlits branches and electrical being exteriorly threaded anda nut Von the threaded part for clamping the stem to the casing.

4. A evice of the class described comprising a ca ing having a slot therein, a pair. of longitu inally 'extending conducting members in the casing, a tubular stem passing through the slot and having branches on its inner end, rollers carried by ythe free ends of the branches en aging the conducting members, a bulb socet on the outer end of the stem, conductors leading from the socket through the stem and its branches and electrically connected with the rollers, the stem being exteriorly threaded, a nut on the thread ed part for cla ing the stem to the casing and su porting 1 eans of non-conducting material or the conductihgmembers.-

In testimony whereof I aix my signature.

WILLIAM B. YOUNG.

ing through the stem and its branches and connected with the conductor engaging parts of the branches wherebyl current, will ioW connected with the rollers, the stem

Images