US1443603A - Safety apparatus for elevators - Google Patents

Description

Jan. 30, 1923. 1,443,603., P. 1. WOOLDRIDGE.

SAFETY APPARATUS FOR ELEVATORS.

omeum man DEC.4,1918. 2 SHEETSSHEET 1.

L. ATTORNEY.

Jan. 30, 1923.

P. J. WOOLDRlDGE. SAFETY APPARATUS FOR ELEVATORS.

2 SHEETS-SHEET 2- ORIGINAL FILED DEC. 4,1918.

INVENTOR.

ATTORNEY.

Patented Jan. 30, 1923.

POWHATAN J. 'WOOLDRIDGE, F PEWEE VALLEY, KENTUCKY SAFETY APPARATUS FOR ELEVATORS.

Application filed. December {1, 1818, Serial No. 265,194. Renewed April 8, .1922. Serial-No. 550,799.

To nrZZ whom it may comern:

Be it known that I, PowHArAN J. lVooL- names, a citizen of the United States, residing in Pewee Valley. Oldham County, Kentucky, have invented certain new and useful Improvements in Safety rrpparatus for Elevators. fully described and represented in the following specification and the accompanying drawings, forming a part of the same. 2

My invention relates to safety apparatus for elevators and more particularly to an apparatus for preventing open doors at elevator landings when the elevator is not properly opposite the landing.

The main object of the invention is to provide an improved apparatus for preventing an elevator from moving materially away from the landing when the door thereat is open, and for locking the door closed when the elevator is moved away from the landing. Further and more specific objects, features and advantages will more clearly appear from the detail description given below taken in connection with the accompanying drawings which form a part of this specification. In the drawings.

i 1 is an elevation partly broken away and partly diagrammatic, of an elevator enrbo ying part of my improvements in a preferred form thereof;

F 2 is a partial section through the elen at the top of the elevator door vator wen. at a landing and showing part of the ele vator in plan view with part of my im"- proved apparatus in section taken on the iine 22 of Fig. 1;

F is a detail vertical view of part of 1y improved apparatus adapted to be attarhed to the top of the elevator, parts thereof being shown in section to more clearly illustrate the operation thereof; and

Fig. 4 is a section taken on the line 41 of Fig. 3.

Referring to the drawings, 5 represents an elevator adapted to be raised and lowered in an elevator well by any well-known or suitable apparatus, preferably by electric power. The top of the elevator is shown at 6 and within the elevator is conveniently situated any suitable or well-known controlling apparatus 7, provided with a handle 3 for affecting in any suitable or well-known manner an electric control circuit, part of which is indicated by the conductors 9. 10

represents an elevator door at one of the landings in the elevator well, which door is adapted to slideback and forth to open and close the door.

Secured to the top of the elevator 6, are a pair of oppositely curved cams 11 and 12, the upper cam 11 being carried by a standard 13 and depending therefrom, and the lower cam 12 extending upwardly from the front side of the elevator. 15 and 16 are two parallel horizontal members connected together at one end by a connecting piece 18 and at the other end provided with right angled turned ends 19 and 20 respectively. The ends 19 and 20 are adapted to have a free sliding movement in guide-ways 21 and 22 supported above the top of the elevator and behind the cams 11 and 12 by a frame 14. The frame 14 is also provided with upper and lower brackets 23 and 24c in which are slidably mounted- vertical rods 25 and 26 respectively. The rod 25 is provided with a head 27 bearing against the upper face of member 15, and with a collar 28 fastthereon and normally bearing against a bearing collar 29 of bracket 23 under the action of a spring 30, one end of which bears against the collar 28 and the other end of which bears against the upper part of bracket 23. If desired a nut 31 may be secured to the upper end of the rod 25. In similar manner the rod 26 normally bears against the under face of the member 16 under the action of a spring 33, one end of which bears against a collar 34 fast on the rod and the other end against the lower part of the bracket 24. If desired a nut 36 may be secured to the lower end of the rod 26.

It will thus be apparent that the horizontal members 15 and 16 may be given a slight upward and downward movement relatively to the elevator from the posltion shown in Fig. 3 against the resistance of the rod 25 or 26 as the case may ,be. The springs 30 and 33, however, acting on the rods 25 and 26 normally hold the members 15 and 16 resiliently in the position shown in Fig. 'When the horizontal members 15 and 16 are moved upwardly or downwardly the parts 19 and 20, operating in the guideways 21 and 22, serve as guides. for such movements.

Carried on the member 18, but suitably insulated therefrom, is an electric contact her 37 which me ta y hi onta t ng the e h 39 are insulated from one another and from the bracket 40 but are electrically connected to the conductors 9 by means oi binding posts 41 and 42 respectively, so that the parts 37, 38 and 39 form a control switch for opening and closing the control circuit 9 upon the horizontal members 15 and 16 being moved upwardly or downwardly. W hen these horizontal members are so moved the conducting bar 3'? is moved away from the spring contacts 38 and 39, thus opening the control circuit.

Pivoted to a stationary part of the elevator well at l3 is a member i l. provided with a slot 43 adapted to be entered by roller ib,

'pivotally mounted on top ot the door ('3.

When the door 6 is opened by movement thereoi in the direction of the arrow 4:7, as shown in Fig. 4;, the roller engages the arms i8 of the member 4A: and operating in the slot 1-5 causes the member l-fl: to be swung counter clockwise as viewed in Fig. i and in between the horizontal members 1!: and, 16 on top of the elevator. This is, of course, assuming that the elevator is oppo a floor landing in which position the members to and 16 are situated to receive the member 44-. The opening of the door swings the member 44 as stated and inserts it into the path of the elevator and the members 15 and 16 to the position indicated in dotted lines 61 in Fig, 4 and in full lines in section in 3. Thereupon it it be attempted to move the elevator up. the relatively stationary member dd carried by the elevator well will engage the member 16 preventing it from moving upwardly with the elevator, and causing the contacts 38 and 39, carried upwardl by the elevator, to be separated. from the contact bar 37 thus opening the control circuit and causing the elevator to stop, the r being applied by any well -known or suitable ar 'angement as is customary when such a control circuit of the ole. .or is broken. If it be attempted to move the elevator down when the door open as above stated the member ll will engage the member 15 and prevent it from moving downwardly with the elevator and so cause the contacts 38 and 39 to be in red the contact bar 37 and open the circuit to stop the elevator and apply the brakes as before. The member 4A; is provided with an upturned flange d9 to engage the member 15 and protect parts hereinafter described carried by the member 4-4. When the door is closed the roller 46 will engage the other arm of the member 44 as the door approaches its closed position and will swing it out of the space between the members 15 and 16, and out of the path of the elevator and'all parts connected therewith, and over the top of the door 10 as shown in full lines is Figs. 2 and thus per-- aitting the elevator to be freely moved upwardly or downwardly to other bindings.

Pivoted on the end of the member 44 50 is a hook 51. A spring 52 normally maintains-the hoolr 51 in the position shown in 4 in full lines, against a pin 33 secured to the member and in such a position that the hook is adapted on movement of member id to be engaged by a (re-operating hoolr rigidl secured in the elevator well or door frame. l?ivoted to the heel: at is a lever normally l ld tion shown in full lines in i f. a spring 23"? which pulls the short arm thereof against the bod portion of the hook 7:] which acts as a stop theretor. fl hen the elevator is opposite the door '10 the long arm oi the le ver 56 adapted to be eigaged by the projecting part of an upright me; iber 58 which extends upward from the top of the eleva tor.

hen the elevator is ma from the landing so that the er is not opposite the outwardly bent abutment part o i' thc u'pright member then it it be attempted to open the door the roller 4-6 will tend to swing the member e4: inwardly, but the hook o'lavill engage the catch. and thus prevent the ber l4 being swung: inwardly into the path of the elevator, and the arm ee8 which is in engagement with the roller 46 will prevent the door from being op ned so that the hooks and 5d serve as latches or catches for locking the door 10 closed position when the ele tor is not properly positioned opposite the elevator landll hen, however. the elevator is proppositioncd opposite the elevator landas the door 10 is opened and the engages the arm i9 and swings i 44 nwardly about the pivot 3.

"iart oi the movement o i position ndi d by dotterially away ed lines 60 in i 4-. the le a" 56 engages he abutment member 53 and causes the lever 56 to swin the heel: to the lo and as shown by do lines in lire. 4: so that the hook 51 will pass clear of the bo b when the member lx-lis tnrther swur the path otthe elevator. As the roar is further opened the roller 46 causes the arm 44 to swing in 'ietwe n the members 15 and 16. the lever 56 by engagement with the member 8a causingthe hook i to be swung}: further in a clockw se direction as viewed in Fig. 4- until the lever 6 -iwings by the member F8 thus permitting the arm 4.4: to swing freely into the position shown in Fin. 3 and by dotted lines 1 in Fig. 4. ll hen the door closed and the member i returned to its normal position, the lever 56 on its pivot 55 order to pass the member 58. but when it has passed the member 58 the spring 57 returns the lever 56 to its normal postion shown in full lines in Fig. l.

in the posi s'z ou'ld not be quite closed and the member 4% not swung entirely out of the path. ot

)QLWEQH the cams 11 and i2, and free of the members 15 and i6. where an up or down movement of the elevator would not cause the opening of the control circuit by action of the switch 37, 38 and'39, then the upward movement of the elevator would cause the cam 11 to engage themeniber ll and swing it out of the path of the elevator and over the top of the door to its normal position as shown in full lines in Fig. l. Similarly he downward movement of the elevator would cause the cam 12 to engage the member and similarly force it out of the path of the elevator. Either of these movements will also cause the member at to act on the roller 46 to complete the closing ot the door and bring the hook the elevator, but to a point opposite and l 51 into operative position with the hook 5-l to lock the door in closed position.

It will be seeni rom the above that the arrangement not only eit ectively and elliciefntly prevents the elevator from beingmoved materially away from the landingwhile the elevator door is open, but also securely locks the door closed when the elevator is not properly opposite the landing. It will be understood, of course, that at each landing there will be provided a member at with its associated parts, so that the doors at all the landings of the elevator well will be properly locked when the elevator is not properly opposite the same, and also upon opening the door at any landing the corresponding member l l will be inserted into the path of the elevator as shown in Fig. 3 so as to prevent the elevator from moving materially away from the landing, The top of the elevator is'preferably cut away as at ($4.- to provide arecess for accomodat ing the downward movement of the rod 26. It is also cut away so as to provide a recess tor accommodating the downward movement of the member 20 with respect to the at the elevator.

ll hile I have described a preferred-.em-

toward the interior of the Well beyond the wall or framework of the well asit exists before the apparatus is added thereto, the

swinging arm or member lprojecting intothe path of the elevator only when the ele-' rator is positioned and the well door openedyalso that no part of the apparatus carried by the elevator need project beyond the sides or extreme limits or" the elevator as it existed before the apparatus was applied thereto.

lVhat is claimed is: I

1. The combination with an elevator well provided with a floor landin a landing door, and an elevator operating in said well, and controlling mechanism for said elevator, of stopping mechanism carried by the elevator and independent of said controlling mechanism, and means adapted. to be projected into the path of said stopping mechanism by the opening of said door and acting to operate said mechanism to stop the elevator responsive to a movement of the elevator away from the landing 2. The combination with an elevator well provided with a floor landing and a land mg door, and an elevator operating in said.

well, of means preventing the opening of said door except when the elevator is 0p"- posite said landin controlling mechanism carried by the elevator, stopping means carried by the elevator and independent of said controlling mechanism, and means adapted to be projected into the path oi? said stopping mechanism-upon the opening of said door and acting to operate said.

mechanism to stop the elevator responsive to a movement of the elevator away from the landing.

3; The combination with an elevator well provided with a floor landing and a landnig door, and an elevator operating in" said well, of operating means for the elevator including an electric controlling circuit, mechanism carried by the elevator for opening and closing said circuit, and means adapted to be projected into the path of said mechanism, and actuated by the open-x ing of said door and acting to operate said mechanism to affect said circuit and stop the elevator, responsive to amovement of the elevator away from said floor.

4:; The combination of an elevator 'wellprovided with a floor, landing and a landing door, and an elevator operating insa-id for'opening and closing said circuit, and.

means adapted to be projected'into the path of said mechanism. by the opening OfSZtlQl door and acting to operate sald'mechanism to affect said circuit and stop the elevator,

responsive to movement of the elevator away from said floor in either direction.

combination with an elevator well provided with a floor landing and a land my; door, an" an elevator operating in said well, of a no pl switch carried by the ele and means adapted to be moved into operative relation to said sw tch by the opening of said ooor, said switch being operated tto stop the elevator by a movement of the elevator away from the door when said means is in operative relation to said switch.

6. The combination with an elevator well provided with a floor landing and a landing door, and an elevator operating in said well, of means for locking said door, releasn ns on said locking means, and a member carried by said el vator and adapted to contact with and operate said releasing means when the elevator is opposite said landing and said releasing; means are actuated by movement of the door, said first mentioned means including a member adapted to be projected into the path of the elevator by the opening oi said door and acting to prevent the elevator from moving materially away from said landing when said door is open.

7. The combination with an elevator well provided with a floor landing and a landin;; door, and an elevator operating in said welhcf a member pivoted to the well and adapted to be swungby the openingof said door into the path of the elevator to prevent the elevator moving materially away from said landing when said door is open, means carried by said member for locking said door, and means carried by the elevator for unlocking said locking means when the elevator is opposite said landing.

S. The combination with an elevator well provided with a floor landing and a landing door. and an elevator operating in said well, of controlling mechanism carried by the elevator, stoppiung mechanism carried by the elevator and independent of said con trolling mechanism, a member adapted to be projected into the path of said stopping); mechanism without contact therewith by the first part of the opening movement of the door and to be retracted by the last part of the closing; movement of the door and operative when projected to prevent the elevator from moving materially away from said landing; by coming in contact with said stopping mechanism, means "for preventing opening of said door, and means carried by the elevator for releasing the door when the elevator is opposite said landing.

, 9. The combination with elevator well provided with a floor landing and a landinp; door, and an elevator operating in said well, of controlling mechanism carried by the elevator, a member adapted to be projected into the path of said controlling mechanism by the first part of the opening movement of the door and to be retracted by the last part of the closing" movement of the door and operative when projected to cooperate with said controlling mechanism to prevent the elevator from moving mate rially away from said landing, means for holdingsaid member in its retracted position, said member when held in its retracted position serving to prevent the opening of said door, and means carried by the elevator and serving to permit said member to be projected and the door to be opened when the elevator is opposite said landing.

10. The combination with an elevator well provided with a floor landing and a landing door, and an elevator operating in said well, of a member adapted to be projected into the path of the elevator by the opening of said door for preventing the elevator from moving; materially away from said landing. said member being adapted to be withdrawn from the path of the elevatorby the closing of the door, and means carried by the elevator for completing the withdrawal of said member from the path oi the elevator should the door be not sufficiently closed therefor.

11. The combination of an elevator well provided with a fioor landing and a landing door, and an elevator operating in said. well, of a member adapted to be projected into the path of the elevator by the open ing of said door for preventing the elevator :rom moving materially away from said landing said member being adapted to be withdrawn from the path of the elevator by the closing of the door, and means whereby movement of the elevator will complete the withdrawal of said member from the path oi the elevator and the closing of said door should the door not be otherwise comthe path 01" said stopping member by the.

openingof said door and adapted to move said stopping member upon movement of the elevator away from the floor landing.

13. The combination of elevator well provided with a floor landing and a landing door, and an elevator operating in said well,

of two horizontal members carried by the elevator. means whereby said members are resiliently held in normal position w1th respect to the elevator, means whereby a movement of either member with respect to the elevator will stop the movement of the elevator, and a member carried by the well and adapted to be projected into the path of and between said horizontal members by the opening of said door.

let. The combination of an elevator well provided with a floor landing and a landing door, and an elevator operating in said well, of a member carried by the elevator and resiliently held in normal position with respect to the elevator, means whereby a movement of said member in either direction with respect to the elevator will stop the movementof the elevator, and a member carried by the well and adapted to be projected upon the opening of said door into position to cause movement of the first said member upon movement of the elevator and to be withdrawn upon the closing of said door.

15. The combination of an elevator well provided with a floor landing and a landing door, and an elevator operating in said well, of a member carried by the elevator and resiliently held in normal position with respect to the elevator, means whereby amovement of said member in either direction with respect to the elevatorwill stop the movement of the elevator, and a member carried by the well and adapted to be projected upon the opening of said door into position to cause movement of the first said member upon movement of the elevator and to be withdrawn upon the closing of said door, and cams carried by the elevator forcompleting the withdrawal of the second said member and the closing of the door should the door not be completely closed.

16. The combination of an elevator well provided with a fioor landing and a landing door, and an elevator operating in said well, of a member carried by the elevator and resiliently held in normal position with respect to the elevator, an electric control circuit for the elevator, a switch in said circuit carried by the elevator and adapted to be operated by movement of said member in either direction to stop the movement of the elevator, and a member carried by the well and adapted to be projected into the path of the first said member upon the opening or said door and adapted to move the first said member upon movement of. the elevator relation to said circuit breaker operating device, so that upon moderate movement of the car the circuit breaker 1s operated by cooperation of said member with said operating device.

18. In elevator mechanism, the combination of a well, a door therein, means located on the well for locking the door but permitting slight ,movement thereof, releasing means for said locking means, and a member carried by the car and acting when the car is close to a predetermined position in the well to contact with and operate said releasing means when said releasing means are actuated bya movement of the door approximately to the point normally permitted by said locking means.

' In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

POWHATAN J. WOOLDRIDGE. Witnesses:

ETHEL Jonnns, A. L. KENT.

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