US707311A - Safety device for elevators. - Google Patents

Description

No. 707,3". Patented Aug. 1,1902.l

J. W. FLEMING.

- SAFETY DEVICE FUR ELEVATOBS,

(Application led Apr. 30, 1902.)

(No Model.)

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UNITED STATES" PATENT OFFICES .IosEPI-I W. ELEMING, 0E PHILADELPHIA, PENNSYLVANIA, AssIGNoE 0E oNE- HALE To IIIEAM HOETEE, JE., or PHILADELPHIA,PENNSYLVANIA.

SAFETY DEVICE FO R v.ELEVATO RS.

SPECIFICATION forming par@ ef Letters Patent 110.707,31, dated August 19, 1,9052.

- Application filed April 30, 1,902.

To all whom t may concern:

Be it known that I, J osEPII W. FLEMING, a. citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented newA and useful Improvements in Safety Devices for Elevators, of which the following is aspecification.

My invention relates to improvements'in safety appliances for elevators; and it consists of novel means whereby when the elevator car or cage is moving either up'or down all of the doors in the elevator'shaft or Well are closed and locked and it is impossible to open either of them until the floor of the elevatorcar is on a level, or approximately so, with the respective iioor of a building.

It also consists of novel means whereby it is impossible toY start the elevator-car when the respective door in the shaft orwell of the elevator is open or until said door is rst closed and locked.

It further consists of novel means whereby any tampering with the doors in the elevator-shaft is prevented.

Figure lrepresents a side elevation of the device as applied to an elevator-shaft. Fig. 2 represents a vertical section on line ww, Fig. 1. Fig. 3 represents a side elevation of certain of the parts seen. in Fig. 1. Fig. 4 represents a partial side elevation and par? tial vertical section of certain of Athe parts seen in Fig; 1, thejsame being on an enlarged scale. Fig. 5 represents aview of thepartsl shown in Fig. 1l, but in different positions. Fig. 6 represents a vertical section on line y y in Fig. 4. Fig'. -7 represents averticalsection on line a' z, Fig. 5. "Fig.' S'represents 'a side elevation of certainv of the parts shown in Fig. 1, uvthe same being on an enlarged scale. Fig. 9 represents a View of the parts shown inv Fig. 8, but 'in different positions. Fig..10 represents a horizontal section on line a a, Fig. 9.

Similar numerals of reference indicate corresponding parts in the figures.

Referring 'to the drawings,H l designates a portion of the inclosure of an elevator-shaft, which latter has located adjacent thereto the bar or rail or runway 2, upon which travel the pulleys 3 on the door 4, which latter is adapted to be moved to the right and the serial No. 105,256. dit magi.)

l left, so a's to either open orelose the'o'pening 5 in the shaft-inclosure 1 in the usual manner. Fulcrumed, as at 6, to thedoor is a lever 7, which has pivoted thereto oneend ofalink 5 5 8, whose opposite end is pivoted-to'the bell-V` crank lever 9, which latter is "fulcrumed at 10 to the door 4, it being noted'th'at said lever 9 has also pivoted thereto one end of a link 11, whose opposite'eu'd is pivote'd at 12 6o to the lever 13, whichlatter is 'pivoted at 14 tothedoorf. ,V

One extremity ofthe lever 13 is adapted to abut at times against Aa bell-crank lever 15,

fulcrumed, as atf16; to the inclosure 1, it be- 65 'ing noted that one limb ofthe lever 15lies in the path of the foot 15", secured'tothe door 4., so as to normally retain the latter in a locked position, and"`tliat said'lever l'has pivoted thereto one end of a link 17, whose 7o opposite end is pivoted, as at 18, to the bellcrank lever 19, which is fulcrumed, as at 20, to the wallof the inclosure 1. Alimb of the lever 19 contacts with an adjustable collar 21,

secured in the present instancebya set-screw `22 to the rod or bar 23, so that said lever 19 may impart motion to said rod23 -for a purpose hereinafter described, it being understood that said rod 23 is of sufficient length to include all the floors in a building which are 8o used in'connection with an elevator provided with the safety device herein referred to.

The upper extremity of the rod 23 is pivoted, as'at 24, to a bell-crank lever 25, which latter is fulcrnmed at 26 to any convenient 85 lixed point,^it'being noted that said lever 25 has pivoted thereto,'as'atv 27, one end of a link 28, whoseoppositeend is pivoted, as at 29, to one extremity of the bell-crank lever 30, which latter is fulcrumed at 31 to any con- 9o veulent xed point, it being further noted thatthe other extremity of said lever 30 has pivoted thereto, as at 32, the cross-head 33, which is provided with slots 34 and 35, which are adapted to receive the pins 36'and 37, 95

which proj eot,respectively,fr om the eccentricrollers 3Sfor a purpose hereinafter described, said rollers beingmounted, as at 43, at any xed points.

' Secured to any convenient point and below 10o the eccentrics 38 is a ledge or bed 39, between `which and said eccentrics 38 passes the cable 40, which actuates the mechanism for starting and stopping the elevator-car and which may be any of the Well-known forms now employed.

The rod23is provided with anotch or recess 41, which is normally in alinement with the bolt 42 for a purpose hereinafter described, said bolt being pressed by the spring 45.

It will be noted that the cable 40 is provided with a spindle or tapering shoulder 44, which occupies a position at a right angle to the bolt 42 for a purpose hereinafter described, it being also noted that the casing of the bolt 42 is secured to any suitable Xed point in the elevator-shaft.

The operation is as follows: Assuming the several parts of the device to be in the positions seen in Fig. l and that the fioor of an elevator-car is on a level with one of the floors of a building, it will be apparent that the door 4 of the elevator-shaft, and which is located on this floor, cannot be opened on account ot' a limb of the bell-crank lever 15 lying in the path of the foot 15, as seen in Fig. 1. When it is desired to open the door 4, the lever 7 is turned in the direction indicated by the arrow b, so that said lever 7 will occupy the position seen in Fig. 3. By observing the direction of movements, as indicated by the several arrows in Fig. l, it Will be apparent that the lever 13 will depress that contiguous limb of the lever 15 which normally lies in the path of said foot 15, and thus permit the door 4 to be opened, in the present instance by sliding the same to the right. When the door 4 is in its opened position, as seen in Fig. 3, the foot 15a will retain the lever 15 in the position seen in said Fig. 3, it being apparent that when the door 4 is being opened the bar 15fL rides over the lever 15. It Will furthermore be apparent that the rollers 38 are caused to turn on theirpivots 43 from their normal positions, as seen in Figs. 1 and 4, to that seen in Fig. 5, whereupon the cable 40 is securely clamped between said rollers 38 and the bed 39 and thereby gripped, (see also Fig. 7,) so that said cable cannot be operated, and the elevator-car consequently cannot be moved until the door 4 is closed, whereupon the several parts will again occupy their normal positions, as seen in Fig. 1, it being noted that as the rollers 38 are then in the positions seen also in Fig. 4 and 6 and the cable 40 is free to move between said rollers 38 and the bed 39, so as to cause motion to be imparted to the elevatorcar. When the elevator-car (not shown in the drawings) is at a standstill, the spindle 44 in the cable 40 is in the position seen in Figs. 1, 9, and l0, its swelled or widest portion being adjacent an arm of the bolt 42, whereby said bolt is withdrawn from the recess 41 in the rod 23, and the-latter thus permitted to be moved up or down by the operation of the lever 7, so as to either clamp the cable 40 or release the same, as hereinbefore described. In order to cause the car to ascend, it is necessary to pull the cable in the direction indi- Fformel1 cated by the arrow c in Fig. 1. It is apparent that the spindle 44 will be moved from the position seen in Figs. 1, 9, and 10 to that seen in Fig. 8, whereby the bolt 42 is returned by the spring 45, (see Fig. 10,) thus causing said bolt to enter the recess 41 and lock the rod 23, so as to prevent the same from being either raised or lowered when the elevatorcar is in motion. When it is desired to cause the car to descend, the cable is pulled in a direction opposite to that indicated by the arrow c in Fig. 1, whereupon the spindle 44 is lowered and brought intol the position seen in dotted lines, Fig. 8, thus releasing the bolt when the latter returns to its normal position, causing the rod 23 to be locked, as hereinbefore described. It is to be understood that every door in the elevator-shaft 1 is provided with mechanism similar to that seen in connection with the door 4 and that there are as many levers 15 and 19 and links 17 as there are doors communicating with the elevator. In order to assist the rod or bar 23 in its ascent, there is connected therewith the balance-weight 46, the effect of which is evident.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an elevator, a door of the elevatorshaft provided with a foot projecting laterally therefrom, a secondary lever adapted to engage said foot, a cable for operating the power mechanism of the elevator, means connected with said lever for clamping and releasing said cable, and a primary lever adapted to operate said secondary lever to remove the latter from the path of said foot.

2. In an elevator, a door of the elevatorshaft, a primary lever mounted thereon, a secondary lever mounted on the elevatorshaft, a foot on the door adapted to be engaged by said secondary lever, means on the door for operating said primary lever and thereby removing the secondary lever from the path of said foot, and means connected with the secondary lever for operating mechanism that engages and releases the starting and stopping cable of the elevator.

3. In an elevator, a bar, mechanism controlling the same operated from the door of the elevator-shaft, a starting and stopping cable, mechanism connected with said bar adapted to engage said cable, a lock on the elevator-shaft adapted to engage said bar, and means on said cable adapted to engage said lock and throw back the same.

4. In an elevator, a starting and stopping cable, means for controlling the same, a lock adapted to engage a member of said means, and a device on said cable adapted in its motion to engage said lock and throw back the same from said member.

5. In an elevator, a starting and stopping cable, a bed over which the same passes, an

eccentric-roller opposite to said bed, a support for said roller, means for lowering and IOD 5 posite direction.

6. In an elevator, a starting and stopping` cable, a locking device therefor, and means for releasing a member of said device from the lock itself consisting of a shoulder on said cable, and a projection on the bolt of said lock, said projection being adapted to be engaged by said shoulder.

7. In an elevator, abar, astarting and stopping cable, a door provided with meansy for operating said bar, and a' clamping device for said cable adapted to be operated by said bar,- in combination with a lock on the elevatorshaft adapted to engage said bar and means on said cable adapted to engage the bolt of said lock.

8. In an elevator, a door of the elevatorshaft, a .primary lever mounted thereon, a secondary lever mounted on the elevatorshaft, a foot on said door adapted to be engaged by said'secondary lever, said secondary lever being adapted to be moved from the path of said foot by said primary lever, a movable bar connected With said secondary lever and adevice adapted to be operated by said movable bar and grip the starting and stopping cable of the elevator and to be released therefrom.

JOSEPH W. FLEMING.

Witnesses: V

JOHN A. WIEDERSHEIM, C. D. MCVAY.

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