US1340195A - Lamp-adjuster - Google Patents

Description

,K. WATANABE.

LAMP ADJUSTER. APPLICATION FILED APR. 22. 1918.

,3 1,340,195 Patented May 18,1920.

KONOSUKE WATANABE, 0F EDMONTON, ALBERTA, CANADA.

LAMP-ADJUSTER.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed April 22, 1918. Serial No. 230,163.

To 66 whom it may concern:

Be it known that I, KoNosUnn WVATANABE, a subject of the King of Great Britain, and a resident of the city of Edmonton, in the Province of Alberta and Dominion of Can ada, have invented certain new and useful Improvements in Lamp-Adjusters, of which the following is a specification.

This invention relates to improvements in lamp adjusters, and the objects of the invention are to facilitate attaching the adjuster to a drop light so that the height of the lamp may be readily changed to suit the requirements of the user, to permit of the adjuster being used with the regular drop lights at present in use without in any way interfering or changing the wires thereof, and generally to adapt the several parts to better perform the functions required of them.

With the above and other objects in view the invention consists essentially of the improved construction particularly described and set forth in the following specification and accompanying drawings forming part of the same.

In the drawings Figure 1 is a front elevation of a drop light showing the improved adjuster mounted thereon.

Fig. 2 is a side elevation of the same.

Fig. 3 is a section through the drawing.

Like characters of reference refer to like parts in the several figures.

Referring to the drawings A represents a drop light of any usual description comprising the lamp 10 and the wiring 11, which is connected to the rosette or fixture 12. Co-acting with this wire is an adjuster B which consists of a drum 13 having side flanges 14: and provided with a hook 15 on the outer periphery of the drum which is adapted to engage with the wires 11 in a manner to be made clear hereafter.

Operatively mounted on the drum are a pair of arms 16 arranged diametrically opposite each other and provided with offset ends 18 which respectively over and under hang the drum 13, the said arms being rigidly connected to a spindle 19, whlch passes through the drum 13 and rotatably engages with the flanges 14.

The drum 13 houses a coil spring 20, the outer end of which is rigidly attached to the inner wall of the drum 13, while the inner end of the spring is rigidly attached to the spindle 19. In this way it will be seen that as the drum is rotated in one direction, the spring 20 will be coiled, and when released the drum is rotated in the opposite direction under the action of the spring which tends to uncoil.

When using the adjuster B, it is only necessary to bend the wires 11 to form a loop, as shown at 21, in Fig. 1; which loop is engaged by the hook 15. The wires 11 are now wound around the drum 13 whereupon the upper portion of the wire is engaged with one of the offset ends 18 of the arms 16, while the lower portion of the wire is engaged with the offset portion 18 of the opposite arm 16.

lVhen adjusting the height of the lamp 10, it is only necessary to exert a pull on the same, and this will tend to unwind the wire 11 on the drum 13. This unwinding of the wire coils the spring 20, and when the lamp has been lowered to the desired extent the twisted portions of the wire engage the olfset portions 18 of the arms 16, so preventing the spring 20 tending to uncoil and rewind the wire 11 on the drum 13.

Should it now be found desirable, after using the lamp, to elevate the same, it is only necessary to move it laterally so that the twisted portions of the wire 11 will disengage from the oifsetportions 18 of the arms 16 and the spring 20 tending to uncoil will rotate the'drum 18 and wind the wires 11 about the same.

lVhen the lamp has been elevated to the desired extent it will hang in this position.

From this description it will be seen that I have invented a lamp adjuster which can be readily attached to the regular drop lights at present in use, thereby effecting a ready adjustment of the height of the same to suit the requirements of the user, the several parts of the invention being of an extremely simple construction not liableto get out of order, while the adjuster can be readily removed if not required.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention within the scope of the claim, constructed without departing from the spirit or scope thereof, it is intended that all mat- 7 directions and a hook formed on the body of the drum between the flanges and adapted to cooperate with the outer periphery of the drum body to clamp a lamp cord therebetween.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

KONOSUKE WATANABE.

Witnesses:

I HECTOR CoWAN,

LIZENA B. SUTHERLAND.

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