US1270716A - Safety apparatus for elevators. - Google Patents

Description

S. A. FLANNERY.

SAFETY APPARATUS FOR ELEVATORS.

APPLICATION FILED IAN. 16. new.

1 ,270,7 1 6. Patented June 25, 1918.

a SHEET-SHEET l.

' INVENTOR yses v I v lawn/ea 7 BY My ATTORNEY S. A. FLANNERY.

SAFETY APPARATUS FOR ELEVATORS.

APPLICATION FILED JAN. 16. [917.

1 ,270,7 1 6 Patented June 25, 1918.

3 SHEETS-SHEET 2.

INVENTOR WITNESSES ATTORNEY S. A. FLANNERY.

SAFETY APPARATUS FOR ELEVATORS.

APPLICATION FILED JAN. 16. m1.

1,270,71 6. Patented June 25,1918;

3 SHEETS-SHEET 3.

lNVENTOR WITNESSES LSZflfta/nner y. I

STEPHEN ALBERT FLANNERY, OF SAN FRANCISCO, CALIFORNIA.

SAFETY APPARATUS FOBEIiEVATORS.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed January 16, 1917. Serial No. 142,690.

To all whom it may concern:

of Fig. 2.

construction in which is adapted to travel a 66L right angles to the beams 3 and having the Be it known that I, STEPHEN A. FLAN- NERY, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State 'of California, have invented new and useful Improvements in Safety Apparatus for Elevators, of which the following is a specification.

This invention relates to improvements in safety apparatus for elevators and has par: ticular application to automatic apparatus whereby the elevator may be stopped and held suspended in the event of the breaking of one or more of the hoisting cables.

In carrying out the present invention, it is my purpose to provide safety apparatus for elevators wherein by means of auxiliary drums and cables and an automatic mechanism controlling the auxiliary drums the car or, cage may be stopped and held suspended in the shaft in the event of the breaking of one or more of the hoisting cables, and wherebya signal will be given to the operator to notify him of the breaking of the cable, and the driving motor of the hoisting drum cut off from its source of power so as to prevent further operation of the drum.

Withthe above and other objects in view, the invention consists in the construction, combination and arrangement of parts herein set forthand falling within the scope of the claims.

In the accompanying drawings t Figure lis a side elevation of the top portion of an elevator shaft and cartherein.

Fig. 2 is a top plan view of the shaft showing the hoisting mechanism and safety apparatus at the upper end thereof.

Fig- 3 is a sectional view on the line 3-3 Fig. 4 is a similar view on the line 4--4 of Fig. 2.

Fig. 5 is a view in side elevation of one of the electroresponsive devices and switches 1,

controlled thereby. t

Fig. 6 is a diagrammatic view showing the wiring connections. I v

. Referring now'to the drawings in detail,

1 designates an elevator shaft of suitable car or cage 2. Mounted upon the upper end of the shaft 1 is a supporting bed or base embodying lside beams 3 spaced apart in parallelism and crossbars 4 arranged at ends secured to such beams. The center cross bars 4 support a frame 5, and rotatably mounted in horizontally alining bear ings carried by the frame 5 is the shaft of a hoisting drum 6. Trained over the hoisting drum 6 are hoisting cables 7, which in the present instance are four in number, and one end of each cable depends into the shaft 1 and is connected with the top of the car or cage 2, while the other ends of the cables are connected with counter weights, as is well known, so that in the rotation of the hoisting drum 6 in one direction, the car will be lowered, and in the rotation of the drum in the other direction the car will be elevated. Riveted or otherwise fastened to the cross bars 4 at each side of the hoisting drum 6 are guide strips 8 having the outer edges formed with upstanding flanges 9 and the confronting edges of the flanges 9 are formed with grooves that provide guideways. Slidably mounted in these guideways and spanning the space between corresponding strips 8 are plates 10, respectively, and upstanding from each plate 10 adjacent to one edge thereof and in proximity to the outermost guide strip is a bearing 11. Secured to the cross bar carrying the strip in proximity to the bearin 11 is a bracket 12, and upstanding from t e bracket 12 is a bearing 13 alining-with the bearing 11. This bearing 13 is threaded interiorly and re-. ceives a screw shaft 14 and integral with one end of the shaft 14 is a shaft 15 that is journaled in a bearing 16 carried by one of the beams 3. Arranged between the bear.- ings 11 and 13 is an auxiliary drum 17 and one end of the drum 17 is connected to the adjacent end' of the shaft 14, while the other end of the drum is formed with a trunnion 18 journaled in the bearing 11. The circumference of the drum 17 is formed with a spiral groove 19 of a pitch corresponding to the threads on the shaft 14. Connected to the drums 17 are the upper ends.of auxiliary cables 20 and the lower ends of these cables 20 are connected with the top of the car or cage 2. The upper end portions of the cables 20 are adapted to lie in the spiral grooves 19 in the drums 17 when the drums are rotated to wind up the auxiliary cables so as to prevent overlapping of the cables on the drums. Splined upon each shaft 15 adjacent to the bearing 16 is a worm wheel 21 that meshes with a worm 22 on one end of a shaft 23. The other ends 20 V rneyjact ,jin*an emergency, to; hold the ear of the"- shafts 23 [are equippedwith" bevel. pinions 24 that mesh with beve1 gears 25 ""onthe ends of; horizontal -sshaft ,26, .-r P. 9- tively, and these shafts 26721? eqli'iiiiied With bevel pinions 27 that mesh:WithesimilarxPifl:

ions 28 carried-by theends of the hoisting drum; 6 so that in the; rotation 01*:the ahoist: .7 ing drum to raise or lower. the car a rotary and sliding movement will behmptftedto the drums 17, thereby enabling the auxiliary ehblesaefo to emain inthe Sal 118 "vertical planes iIijgth windihgand u winding there i of. Under normal conditions; that 1s when th cztbles 7 are intachsiich cablestake the entire-Weight of the car, and in the; mo ement' of the car in;the shaft thefldrlims l7 o 'ierajtefto d wnp the cables and to'phty out'sueh' .jeebl'es according" to'the directionof travel of the car, thereby relieving the" ca in" lthe' shaft, as Willbe qres ntly decr'ibed; Mounted uponjeach pate "10 adjacent to one end "of the (1111111117 and extending at;

right a gles to the drum is an' eletro-re sponsive devieein thef ormof a mtgnet'28. This magn t 28 is spaced abovethe plate 10,: em slidebly mounted up'on' thejpktte 10.1 below; the Inggnetis a, plate 29, end eonheat d to -thfend of th iplitte29 're'mqte from the armtttl re 30 disposed within t11e1 fl enre of izt'fpole of f'the magnet 281'; oh the other nd r (the plate 2.9

i upstandin hrmsl thhtis formed with outwardly projecting teth32',, and surrounding the triinnion 186i the driim is spurgear 33 fixed to such druniandadapt-I 1 ed to be engagedbyth ,teethi3 2o'n the'z rm.

5 81 when theplate'29his moved underthe a0,-

i h with thejdruins.

tion of the v meg-net or hrmetureh; When the spur gear -33am enga ed by the ,teethj32, the auxilierydrums' 17 are locked against Y rotation,v (thereby preventing dewnwhrid V j movement ofthe car int-the shaft,

e the, nin'gnet's 2 8,f jend, di hhjflhhrel mm' t d hp'ori the plates 10,},andfth drums; connected, 'l'vvith the; screw shafts: 1.4:, it Will 7 7 bei-seen thttt in therotzttionofgtheselshafts 14 to revolve the 1 drums 1 7, such; shafts. and

Located in i he lamp 35 rjcblbreq tied, and electro-responsive dey' inithefetni "of, smenbi'dsse) COIT+ v spoIldmglfihfniimber with the hoisting cables L 7 Eficiiusol'enoidfiti is equipped with core:

coiincted with the lowerf endao f he cores iaiteicfzontact;fingers 38 and :39 adim-pile'(1iv te. ehge'ge eentacts eo and 41, "respeetii' elm, i enthecore-islowei'ecl positionf 'Each so1eno1djzind ,'the .corites'ponding contact an i; contacts are lfloiintd iip'oh .9; base late-42; asci hiiyiiidshhtedhi-Fig.5 of thedrawings.

43 and 44 ies;gnateibiniiin-g gests adapted tribe-connected to the source of electric cur- :renti s1Ipp1y.f"and.-a1ea 1ing from the ib1nd1ngpost 43 is a current carrying conductor 45. *Tepped ronto the conductor 451z re gbi i shQS 46 that bear upon the cabies'T, respectively,

'atdjzicentto the hoisting drum 6.- Connected to the cables 7 at the lower: eXt-fiemities thereof are condii'ctior's" 47,- 11-esp;ectiveiy; tnd these conductors .47 extend thronghihe resp'ective'sjolehoi'cl windings 6. and hire steppedonto it eturn Wiie48; t h"atisconnected'withg j,

the Binding 505144. Tapped :onto' the con= diictor '45 is one terrnin'tlfof a onductor .49, ztnd connecte'clftVt cores 37 of, l c pl ilbiid i, 3 meted inFig 'GofItIie/draLWingS. Connected with the eenduefieh e9 4 is one terminal of cfi'ilduhtor fiQhii'cLthis conductor .50 is connegted to oi-11h.te minal of the signal lamp 34, and leading ftoiii thelo'the'r terininal'of the ei hel ,l mp 34 is cehductehjer that is terminally connec ed with the: eturn ire:

'48, lEhe conta ts 41 "ere ebnne'eted jwiith e cdndiictqr,52 G131 extends through o e of and; is connected with the V the magnets 2 binding; pest-44. This.eoh hchirisehhd extends nth h the hhhduc hr'ee re he I "'iehr vyiuus tappedlonto the;dondiictor51;W il'eflleheiin from the cdndtl'jcto i 52 :iS it"branch conductor 53 that'geiitendsf j through-the other m'ztg'neh e 282211161 isterinijnallyhom ect d withthe diie'to'r 5,1; The enthht erf cenneeted witl the c indiictor designates e inotor cone; U netted with the hoi'sting druni '6 toiievolve theletter ancli-oneside;of thisn otor is @011 heated withthe'eonductbr 745A edjhbnt' to the] binding post 4:; by hieensiof cenduemr 55" th t includes controlling switch 56 endthei one terminalofha ,conductorfi? that extends Q through a circuitbreeiken58j1nc1er the con- 5 trol ,o'f themegntsj 2 5; other other; fie -mj'e dffthe' c'oiidncto'rj 7 b ih'githppedientegthe gegecLbyj snc-h lever Whe' the switeh isin off position is at contact 59," 2tnd leedinglfroin 91 the the contactfiii. is a conductor: :60 connected with the sideofthesignaflernp 35*0PPI sit from theconductor 51,-

intact; the solenoids 36 "are iZeeL and thegreen1a1np34 burns,-, cnrf nt flows from the binding post 4'8 through the, conductor 7 binding. fr m 1 9 1 and the core 37 of such solenoid will drop down, thereby engaging the fingers 38 and 39 with the corresponding contacts 40 and 41. When the contact finger 38 engages the contact 41 current flows from the conductor 49 through the core of the solenoid and through the conductor 52 and then through the magnets 28 back to the binding post 44, thereby energizing the magnets 28' to hold the auxiliary drums against rotation and thereby prevent the moving of the car in the shaft. Upon the energization of the magnet 28 controlling the circuit breaker 58 the circuit breaker is operated to deenergize the motor 54 thereby stopping the operation of the hoisting motor. When the contact 39 engages the contact 40 the green lamp 34 is short circuited, while the current from the conductor 52 flows through the red lamp 35 to indicate the condition of the apparatus.

In the normal running of the car, the lever of the switch 56 engages the contact 59 whenever the switch is operated to open position, thereby closing the circuit through the red lamp 35.

While I have herein shown and described the preferred form of my invention by way of illustration, I Wish it to be understood that I do not limit or confine myself to the precise details of construction herein shown and described, as modification and variation may be made within the scope of the claims and without departing from the spirit of the-invention.

I claim 1. In safety apparatus for elevators, the combination with the car, hoisting drum, and hoisting cables, of auxiliary drums, cables having their lower ends connected to the car and their upper extremities connected to said auxiliary drums respectively, driving connections between said hoisting drum and auxiliary drums whereby all of said drums may operate in unison, and electroresponsive devices under the control of said hoisting cables and operable to hold said auxiliary drums against rotation in the event of the breaking of one of said hoisting cables.

2. In safety apparatus for elevators, the combination with the car, hoisting drum, and hoisting cables, of auxiliary drums, cables having their lower ends connected to the car and their upper extremities connected to said auxiliary drums respectively, driving connections between said hoisting drum and auxiliary drums whereby all of said Copies of'this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

drums may operate in unison, electroresponsive devices under the control of said hoisting cables and operable to hold said auxiliary drums against rotation in the event of the breaking of one ofsaid hoisting cables, and a controlling circuit including said hoisting eablesand electrorcsponsive devices.

3. In safety apparatus for elevators, the combination with the car, hoisting drum, and hoisting cables, of auxiliary drums, cables having their lower ends connected to the car and their upper extremities connected to said auxiliary drums respectively, driving connections between said hoisting drum and auxiliary drumswhereby all of said drums may operate in unison, electroresponsive devices for holding said auxiliary drums against rotation in the event of the breaking of one of the hoisting cables, an electric circuit including said devices, electroresponsive devices controlling said circuit, and a circuit includin said hoisting cables and said last named e ectroresponsive devices.

4. In safety apparatus for elevators, the combination with the car, hoisting drum, and hoisting cables, of auxiliary drums, cables havin their lower ends connected to the car and t eir upper extremities connected to said auxiliar drums respectively, driving connections etween said hoisting drum and auxiliary drums whereby all of said drums may operate in unison, electroresponsive devices for holding said auxiliary drums against rotation in the event of the breaking of one of the hoisting cables, an electric circuit including said devices, electroresponsive devices controlling said circuit, a circuit including said hoisting cable and said last named electroresponsive devices, and signal lamps under the control of said last named electroresponsive devices.

5. In safety apparatus for elevators, the combination with the car, hoisting drum, and hoisting cables, of auxiliary drums, capable of rotary movement and longitudinal movement, cables having their lower ends connected to the car and their upper extremities connected to said auxiliary drums, respectively, and adapted to wind around the drums in the rotary and longitudinal movements thereof, and driving connections between said hoisting drum and auxiliary drums whereby all of said drums may be rotated simultaneously and said auxiliary drums moved longitudinally.

In testimony whereof I atlix my signature.

STEPHEN ALBERT FLANNERY.

Washington, D. G.

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