US1233601A - Pulley mechanism. - Google Patents

Description

' C. R. PI'EPER.

PULLEY MECHANISM.

APPLICATION HLED JAN. 11. 1915.

Patented July 17, 1917.

j CHESTER a. rinrnator LA cnossE, Wiscons n.

To all whom it may concern: a

4 Be it known that I, CHESTER R, PIEPER, citizen of the -United States, M residing at La Crosse, in the county of La Grosse and new and useful Improvement in Pulley -Mechanism, of which, the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming. a part of this specification.

My invention relates to apparatus for support-ing energy translatingdevices and includes the cord'or string by which a translatingdeviceis supplied with energy which with pulleys, and a supplemental supportingdevice whereby the vertical position of the translating device may readily be varied and adjusted.

The apparatus of my invention is of particular service in the sup-port of incandescent lamps, current conducting cord being employed for furnishing the lamps with electrio current and entering into the function of supporting the lamps.

My invention has as another of its char .acteristics the improved formationof a pulley housing or support having several novel and useful characteristics.

I willfexplain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure 1 is a side elevation illustratin the preferred form of one adaptation o my invention; Fig. 2 is r a view of one of the pulleys on line 2 2 of Fig. 1; Fig. 3 is a view on line 3 3 of Fig. 2; and Figs. 4 and 5 are detail views.

Like parts are indicated by similar characters of reference throughout the different figures. V

The incandescent lamp 1 is of the drop- .light variety, the lamp being carried by and included in circuit by means of the usual 45 pendant double cord 2 which is suitably anchored to the ceiling or other main support within a rosette 3, in accordance with common practice. The cord where adjacent the ceiling is returned uponitself to constitute a loop in the bight of which a floating pulley 4 is received, this pulley being sulta 1y weighted to approximate the weight of the lamp and its shade whereby the pul ley 4 will descend when the lamp 1 is elevated, and will hold the lamp when brought Specification of Letters Patent.

State of Wisconsin, have invented a certain itis to translate, operating in COIljllIlClilOIi PULLEY MECHANISM.

Patented July 17, 1917.

Application filed January 11, 1915. Serial No. 1,677.

7 to desired vertical adjustment. The loop,

whose sides are thus changeable in length and whose bight is thus changeable in loca- 1 tion inorder that thelamp may be support ed in ts various positions of vertical adjustment, is maintained by means of a light or unweighted non-floating pulley 5 whose housing 6 is attached to the ceiling inde-.

pendently of the cord 2, rather than with the aid thereof as hitherto. The means by which the housing 6 of the pulley 5 is supported desirably includes a hook secured to the ceiling or other uppermost and main support at the rosette 3. .The hook 7 receives the eye 8 at the upper end of a link 9 whose lower endterminates in a hooklO that receivesthe staple eye 11 upon the upper part of .the housing 6.

By this arrangement the weight of the Weighted pulley 4 is divided between the portion of the current conducting cord 2 attached to the ceiling and the link 9 in stead ofbeing borne altogether by this portion of the current conducting cord, as.

hitherto. Furthermore the weight of the lamp and its shade is not borne by this up per portion of the cord but is borne by the link 9 and the pulley 5 intervening between the link 9 andthe lower stretch of the cord.

A rosette anchoring screw 12 also desirably passes through the stem of the hook 7 in order that this hook may be mounted in the desired. place. The hook and link enable the upper pulley 5 to swivel so that itmay be drawn invarious directions and bodily turn to rotate on its aXis without any undesirable side strain. When this pulley r is released from any side thrusts or pulls it will readily return to its normal position. The elements 7 8, 9, 10 and 11 thus constitute a flexible support for the upper pulley 5 whereby it may be mounted upon the ceiling or other main support in a manner to permit its position to be changed as desired.

The housings for the pulleys 4 and 5 desirably are of similar formation each being preferably of hollow globular shape, the lower and floating pulley housing 13 carrying iron slugs 14 in order that this pulley may be weighted, while the housing 6 for the upper and non-floating pulley is free of such slugs as this pulley serves to define the loop that holds the floating pulley 4 and therefore does not have to exert any counterbalancing effectto offset the weight of the bottom by lamp and its shade. While the cord 2, herein shown, serves to convey energy in the form of electric current to a translating device in the form of an incandescent lamp, I do not wish to be limited to the form of energy that the cord is nor to the nature of the translating device which the cord supports at its lower end.

I Will now describe the improved formation of housing which is preferably employed in connection with each of the lower and upperpulleys 4 and 5. Each globular housing preferably includes two thin hemispherical metallic shells 15 which are united atthe top by the staple eye 11 and at the the staple 16. The hemispheric shells are provided with recesses 17, the recesses in each shell being symmetrical with respect to the recesses in the other whereby passages are afforded to permit of the travel of the cord 2 through the globular housing. The long edgesof the recesses 17 constitute seats for diaphragm's 18 which are formed in a pair, the diaphragms being united by a yoke 19 integrally formed there with; The yoke is secured in relation to the hemispheric shells by the staple 11. The diaphragms are, the shells but project beyond the same at the recesses 17, the

diaphragms at the recesses 17 being bent over to constitute lips 20. A pulley shaft 21 projects through flanged holes in the diaphragms for-the support of the housed pule ley, the portion of the shaft intermediate the diaphragms being larger than these holes to have end engagement with the diaphragms and being of such length .as to constitute a distance preserver to maintain the diaphragms snugly upon their seats at the recesses .17. The shaft 21 is dropped suflic'iently to afford ample clearance between the groove of the pulley and the upper Copies of this patent has be obtained for fivee'e'nt s; each, by

adapted to convey in the main, surrounded by projecting portions of these I portion of the housing for the passage of the cord.

. While I have herein shown and particularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. A pulley structure including a pulley; and a housing therefor formed of two shells, a diaphragm seated upon each of the shells .upon and between which diaphragms the pulley is mounted, the pulley having a distance preserving portion intervening between the diaphragms to maintain the diaphragms in engagement with the shells.

2. A pulley structure including a pulley; and a housing therefor formed of two shells, a diaphragm seated upon each of the shells upon and between which diaphrag'ms the pulley is mounted, the pulley having a distance preserving shaft portion intervening between the diaphragms to maintain the diaphragms in engagement with the shells.

3. A pulley structure including a pulley; a housing therefor formed of two shells, a diaphragm seated upon each of the shells upon and between which diaphragms the pulley is mounted; and a distance preserving portion intervening between the diaphragms to maintain the diaphragms in engagement with the shells.

In witness whereof, I hereunto subscribe my name this fourth day of December A. D., 1914.

CHESTER R. PIEPER.

Witnesses:

H. H. Lone, FRED L. STRAUSS.

aadressmg the commissioner of Patents.

Washington, 1). 'c."

Images