US416255A - corthell - Google Patents

Description

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v P. H. CORTHBLL. DEVICE FOR SUSPENDING LAMPS.

No. 416,255. Y Patented Deo. 3, 1889.

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P.: H. GORTHBLL. DEVICE FOR SUSPBNDING LAMPS.

No. 416,255. Patented Deo. l3, V1889.

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` NITED STATES PATENT OFFICE..

FRED II. CORTHELL, OF ELGIN, ILLINOIS, ASSIGNOR OF ONE-HALF TO GEORGE E. HUNTER, OF SAME PLACE.

DEVICE FOR SUSPENDING LAMPS.

SPECIFICATION forming' partof Letters Patent No. 416,255, dated December 3, 1889. Application tied August s1, 1889. serial No. 322,548. v (No model.)

To all whom. it may concern:

vBe it known that I, FRED II. CORTHELL, a` resident of Elgin, in the county of Kane and`= State of Illinois, have invented certain new and useful Improvements in Devices for Suspending Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of the invention is to effect, through the balancing power of a spring, the vertical adjustment of electric lamps which are suspended by meansof flexible conduct.-

ors; and it consists in the construction hereinafter described, and pointed out in the claims.

In the accompanying drawings,fFigure l is a vertical central section of the novel device, taken lengthwise of the drum. Fig. 2 Vis a similar section on lline 0c of Fig.l l. Fig. 3 is a plan of the device with the top removed. Figs. 4 and 5 are respectively an elevation and plan of the drum and its frame, showing the position of the ratchet and retaining-pawl with reference thereto. Figs. 6, 7, S, 9, and l0 are views of details and modifications.

Like letters refer to like partsin all the above figures. i

The construction includes an ornamental case of sheet metal in three parts-wiz., the body a, the top a', and bottom CL2-having notches to allow the passage of the'lugs n n n'2 n3, whereby they are secured to the body.

B is a frame secured by soldering or otherwise within the body a, as indicated at B, having the openings b and b to receive the journals of the drum-shaft O..

D is a drum, preferably of wood, having the transverse opening J for a suspending-cord, and c a spiral spring inclosed inthe metallic spring-box d and attached'thereto and to the drum by means of the spring-hook r.

C indicates a drum-shaft having the ratchet f firmly fixed thereto, and g a winding-lever loosely fitted thereon and movable between the said ratchet f and the frame and carrying the vwinding-pawl 7L.

is a retaining-pawl that holds the ratchet- 5o drum shaft and spring while the Windingpawl is moving forward to engage an advanced tooth. It can be tripped by lever z' denotes a hook engaging its spring at its inner end or at the center of the coil and connecting it to the shaft. The screws k and lo engage the drum-shaft orstationary vaxis C, forming extensions thereof, and facilitate the putting together of the parts.

The following is a description of the method of putting the device inroperation, reference being had to Figs. l, 2, 3, 4, and 5: The lamp being disconnected, its suspending-cord is passed through the opening Iy in the case, and thence through the opening j in the drum D, and thence out of the case through the opening y. The lamp is now connected to the cord and the adjusting device placed in the desired position on the same and the lower portion of the case a2 disconnected from the body a. This is effected by turning the part a2 until the lugs n and n will pass its notches. The bottom a2 can thenbe slipped down on the cord far enough to allow the windinglever gto be operated to move the notched drum-shaft by means of the pawl 7l, whereby is put upon the springe the tension required to balance the lamp within the limits desired. After the sp1-ing is wound, Vas above stated, the bottomof the case is replaced upon the body and the device is ready for use. It will of course be understood that the turning by means of the lever g and pawl h of the ratchet Afixed to the drum-shaft increases the tension of the spring or winds it up, one end of the spring being xed by pin or hook r to the drum, which is held from rotation by the cord that passes through opening j, except so far as the cord is wound upon thedrum, and the other end to the shaft O by the hook or pin t'. The spring, when thus wound up, counterbalances or aids in counterbalancing the lamp by its effect upon the suspending-cord 4through the medium of the drum. The passage of the suspendingcord through the drum provides that it may be situated in or near the axis of the case.

The case may be made of. any desirable contour and variously ornalnented, and may be made in two parts instead of three, and the parts may be connected by other devices than those described. The part a may in some cases be omitted, or parts a and a might IOO be made integral with each other, and other portions of the device may be varied by mechanical skill wit-hout departing from the invention.

In Figs. G and 7 is shown a supplementary device, which can be used, if desired, consisting of the centrifugal pawls v r', pivoted at t to the drum and adapted to engage the ratchet 0,1ixed to frame B. These pawls are similar in mechanical operation to Wellknown curtain-xtmes, and serve to hold the drum and lamp when the latter has been placed in the required position, and are especially applicable in case that it is desired that the spring shall constantly more than balance the lamp.

The operation of the spring c may, .if desired, be aided by a second spring p, as indicated in Figs. and 10. (l is a box inclosing the same, and s a tubular extension or shaft iixed to said box q, and to this tubular shaft s spring c is connected by the pin or hook t'. The spring p is also connected at one end to box q and at the other to the shaft C. The turning of the shaft to increase the tension of the spring c will, through the medium of the latter, turn the sleeve or shaft s and box q, and thus increase the tension of the spring j) also, and in operation the latter spring will aid the former, and thus increase or widen the limits of an approximately uniform tension of the springs The case herein described, which may be made of any suitable material, is not essential to the operation, nor is the particular frame. If the ease were wholly omitted, the device could yet be used to apply the tension ol' the spring to a suspending oord, chain, wire, or equivalent, and the spring will tend to turn the drum about the shaft, and will therefore tend to lift the cord independently of the case or the special form of the'frame. Should the drinn not be held during the operation of Winding the spring, it is evident that at least a portion of the cord would. itself become Wound upon the drum, and thus it is apparent that tension may be put upon the spring by winding a surplus of cord upon the drinn, and then unwinding that surplus by pulling upon the cord, the drum-shaft being held from rotation. Likewise various mechanisms operating to turn the drum-shaft could be substituted by mechanics without sacrificing the advantage of the improvement.

Having thus described my invention, what I desire to secure by Letters Patent is l. In a suspendingdevice, the combination i of the suspending-cord, the drum mounted loosely on a shaft and provided with atransverse opening to receive said cord and adj ustable thereon, and a spring having one end attached to the drum and the other to the shaft, and mechanism for turning the shaft to `give tension to the spring, substantially as set forth.

2. In a suspending device, the combination of the suspending-cord mounted loosely on a shaft, and the drinn provided with a transverse opening to receive said cord and adjustable thereon, and a spring having one end attached to the drum and the other to the shaft, andv mechanism for turning the shaft to give tension to the spring, and an inelosing-case, also adjustable on the cord, substantially as set forth.

3. In a suspending device, the combination of the suspemling-cord mounted loosely on a shaft, the drum provided with a transverse opening to receive said cord and adjustable thereon, and a spring having one end attached to the drum andthe other to the shaft, and mechanism for turning the shaft to give tension to the spring, and an inclosing-case, also adjustable on the cord and having. a part or section made detachable to give access to the mechanism, substantially as set forth. i

Al. In asuspending device, the combination of the suspending-cord mounted loosely on a shaft, and the drum provided with a transverse opening to receive said cord and adjustable thereon, and a spring havin g oneend attached to the drum and the other to the shaft, and mechanism for turning the shaft to give tension to the spring, and the supplementary spring, substantially as set forth.

5. In a suspending device, the combination of the suspelnling-coid mounted loosely on a shaft, and the drum provided with a transverse opening to receive said cord and ad j ustable thereon, and a spring having one end attached to the drinn and the other to the shaft, and mechanism for turning the shaft to give tension to the spring, and the centrifugal pawls pivotcd on the drum, and the ratchet connected to the shaft, substantially as set forth.

In testimony whereof I have signed this specihcation in the presence of two subscribing Witnesses.

FRED II. CORTIIELL.

\Vitnesses:

ino. E. HUNTER, GaAs. P. Comas.

IOS

It is hereby eertiied that in Letters Patent No. 416,255, granted December 3, 1889, upon the application of Fred. H'. Corthell, of' Elgin, Illinois, for an improyement in Device@` for suspending Lamps, errors appear in the printed specification requiring correetiornes followsi In lines 68, 78, 90, and 99 the Words the drum should be stricken out, And inserted after the Words suspending-cord in lines 67, 77, 89, and 98, respectively; and the said Letters Patent should. be read witl1-these corrections therein that the saine may conform to the record 0f the ease in the Patent Ofee.

Signed, counter-signed and sealed this 24th day of December, A. D. i889.

i [EAL] CYRUS BUSSEY,"

Assistant Secretary of the Interior. Countersigned:

C. E. MITCHELL,

Commissioner of Patents.

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