US1246256A - Safety device for elevators. - Google Patents

Description

W. GALLIMORE, DECD. s. P. summons. Anmmsnmmx. SAFETY DEVICE FOR ELEVATORS. APPLICATION nuao JULY 12. 1911,

' E .1 ,246,256. Patented N0v. l3, 191?.

IIEJrL- 2 SHEETS-SHEET 2.

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WILLIAM GALLIMORE, DECEASED, LATE 0F GALAX, VIRGINIA, BYSURILDA IE. GALLI- MORE, ADMINISTRATRIX, 0F GALAX, VIRGINIA, ASSIGNGB OF ONE-THIRD TO DAVID M. BRYANT, 0F CLIFFVIEV], "JIRGINIA..

SAFETY Davies roaniinvsrons.

. Specification of Letters ream. s a eo 3, 17;

Application filed July 12, 1917'. Serial No. 180,181.

To all whom z't may concern: 1

Be it known that WILLIAM GALLIMQRE, deceased, late a citizen of the United States, and resident of Galax, in the county of Carroll, State of Virginia, invented new and useful Improvements in Safety Devices for Elevators, and that SL'RILDA P. GALLIMoRn, the duly-constituted adminstratrix of the estate of WILLIAM GALLrMonE, deceased, does hereby declare the following to'be a full, clear, and exact description of the said invention of said decedent, \V LLniM GALLI- MORE, and such as will enable others skilled in the art to which it appertains to'inake and use the same.-

The present invention relates to thatclass of devices, intended to prevent elevators from falling in case of breakage of the suspending cable or cables.

Numerous devices have heretofore been devised for attaining the same end, but the object of this invention is to provide means which will be comparatively simple and inexpensive, yet highly efficient, and with this general object in View, the invention resides in the novel features of construction and unique combinations of parts to be hereinafter fully described and claimed,the" descriptive matter being supplemented by the accompanying drawings which form a part of this specification and in which;

Figure 1 is a side elevation with parts broken away and in section, showing the relative positions of parts when all parts of the raising and lowering mechanism are in 'operative condition;

Fig. 2 is a duplicate of Fig. 1 with the exception that it illustrates the relative position of parts when the elevating cable should break from any cause;

Fig. 3 is a bottom plan view of the elevator; and

Fig. i is a detail perspective view of the upper crossed ends of the two levers to which the elevating cables are connected.

In the drawings above briefly described, the numeral 1 designates a common type of elevator, whereas the numeral 2 has reference to the usual vertical tracks between which said elevator slides, the inner side of said tracks being preferably provided with vertically spaced teeth 3, as shown clearly in Figs. 1 and 2. The elevator 1 includes a platform 4;, a pair of standards 5 rising irom said platform, and a horizontal crown bar 6 secured at its end to the upper ends of said standards. It is to the'bar 6 that the raising and lowering cables 7 are usually connected. Due to the nature of the present invention, however, said bar is provided witlia longitudinal slot 8 throughwhich a pair of levers 9 extend, it being to the upper ends of these levers that said cables are attached. I is The levers '9 are fulcrumed near their lower ends at 10 to the standards 5, said levers preferably projecting through vertical slots 11 in said standards as shown, and having their lower extremities 12 shaped for anti-slipping engagement with the teeth 3. The two levers converge upwardly and cross each other near their upper ends, said last named ends having enlargedheads 13 formed thereon to-which the cables 7 are attached The heads'13 are-of considerably greater thickness than the levers 9 and the lower edges of said head's thusform transverse shoulders 14, the shoulder of each'lever abutting the other lever as will beclear from the drawings, in" order to maintain said levers in crossed relation. Should the cables 7 be broken, however,-a coiled spring 15 serves to draw the two levers toward each other at their upper ends so that their lower ends 12 are thrown outwardly into engagement with the teeth 3, thus preventing the elevator from falling. During this operation, the weight of the heads 13 assists materially in quickly throwing the levers to operative position. I

The cables 7 are shown wound around a "suitable drum 16 which may either be located at one of the lower floors of the building, or at the top thereof. The former location being illustrated, with the result that pulleys 17 are shown around which said cables are trained. A slack cable 18 is also wound upon the drum 16 and passes around suitable guide pulleys 19, the lower end of said cable being connected to a second lock ing means which is automatically brought into play to prevent falling of the elevator in case the levers 9 should for any reason fail to operate.

The locking means last referred to, consist of a pair of bolts 20, mounted slidably beneath the platform a and pivoted at their inner ends to the opposite ends of a hori zontal lever 21 which is fulcrumed centrally as shown at One end of .thecable 18 is connected to one end of lever 21, as shown most clearly in Fig. 3, so that whenever said cable is drawn taut by breakage of the cables 7, it will so operate 'leverQl as to throw both bolts :20 outwardly into engagement with the teeth 3. This will prevent any possibility of the elevator dropping by gravity, even though the levers 9 should for any r a on fail t op a e a i tended. A manual cont ol, pre er b y in th o m f a vertical leverj23, is carried by the platform A, said lever being connected at its lower end by a link or the like 24, with the lever 21. By this means, whenever the elevator is stopped ,at any floor, and it is intended tha tit shall remain at this elevation for a considerable length of time, the operator need only actuate the lever 23, thus projecting both bolts 20 into adjacent teeth 3 so that it is impossible for the elevator to be lowered. v

In operation, assuming that all parts are properly operating, the drum 16 is rotated to :either raise or lower the elevator l ,as occasion may demand, the-entireweight of said elevator being supported on the cables 7 and the crossed levers 9, thezcable 18 now remaining slack so that it exerts no tendency to iOperate the bolts 20. Should the cables 27 become broken or damaged, however, so that they nolongeretlectively support the weight of'thei-elevator, the cable 18 is drawn taut, with theresult thatthe lower end ro f-this cable pulls upon lever 21 and so actuates the latteras to project both bolts 20. At substantially the same time, since the levers 9 are released by the defective cables 7, said levers will be rocked around their fulcr uns lOuntil their lower extremities 12 arebrought into engagement with the teeth 3. Two locking means are thus applied simultaneously toprevent any possibility of the elevator falling. It willbe understood, however, that although both means are shown on an-elev -ator and are preferably employed together, either locking means could well be installed without the other, and would be very effective.

From the foregoing, taken in connection with the accompanying drawings, it Will be obvious that, although the invention is of comparatively simple and inexpensive nature, it will be highly efiicient and durable changes be made without sacrificing the pr ncipal advantages.

I claim: j The,combinationof anelevator including a platform,.a ,pair of vertical standards rising from said rplatform and having vertical slots, a .crown bar extending betweenthe upper ends of said standards and secured thereto, said crown barhaving a longitudinal slot,,vertical tracks between which saidelevator slides, said tracks havingteeth on their inner sides, a pair of crossed'levers extending through the slots of said standards and crown bar and fulcrumed to the former, the lower ends ot said levers being shaped for engagement with said ,teeth, headsvon the uppcrends of said levers, said heads being of I greater thickness than said levers and extending laterally therefrom to form shoulders, the shoulder of ,each lever abutting the other lever to vmaintain them ,in crossed relation,,and raising and lowering means forthe elevator connected to said I heads.

Intestimony whereof 1, Summe P. GAL- .LIMORE administratrix of the estate of Wm IA v GALLIMORE, have-hereunto set ny hand in the presence oftwo subscribing witnesses.

SURILDA' P. GALLIMORE, Admiltt flffat'f'iw of said William Gallz'mm'e,

deceased. .Witnesses S. P. DAVIs, J. J. .DOBYNS.

cGopies otthispatent maybe obtained for five cents each by addres sing the Commissioner of iaten'ts,

Washington, D. G.

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