US1149450A - Safety device for elevators. - Google Patents

Description

A. KAMPFE. SAFETY DEVICE FOR ELEVATORS. APPLICATION FILED DEC- 24 I914.

1 149,450. Patented Aug. 10, 1915.

W/T/VESSES: INVENTOR & 6 {W BY wm ATTORNEYS ivrrn as ATENT oFFio .AUGUST KAMPFE, F CLEVELAND, Oll-IIO.

SAFETY DEVICE FOR ELEVATORS.

specificationjof Letters Patent. t te 1 5 Application filed December 24, 1914. Serial No. 878,267.

for Elevators, of which the following is a specification.

This invention pertains to safety devices for elevators, and the object of the invention is to provide three safety precautions which are mutually dependent and coiiperate to protect an elevator against 1 possible accident To these ends, I provide means to automatically look: a door when the car is I 'ble of movement. when thecar is at the land-,

- away fromthe landing either direction and to automatically.unlock-the same when at a landing; secondly, to automatically opened and to automaticallyunlockor.re-' lease the car when the door is thirdly, to grip the operating cable when the door is opened and the car locked and to release the cable when the door is closed and the car unlocked to move in either direction. In the two latter movements, the door is the initial actuating medium While, in the first instance, the freedom of the door is dependent on the position of the car'in respect to the landing.

In the accompanying drawings, Figure 1 is a'relatively'sectional elevation of 'a car and a door at a landing with the parts in the position seen in Figs. 2 and 3. Fig. 2 is a sectional elevation at right'angles'to Fig. 1. Fig. 3 is a horizontal View and Fig.

4 is an enlarged sectional elevation showing the door locking mechanism in locking position. the recess or pocket inset in the door in which the latch engages. v

' As thus shown C represents the car, or

a part thereof, and D the door. L is the landing and 2 the pivoted latch or dog by which the door is locked. The said latch is supported on a post or standard 3 from the landing and has an arm 0. adapted to rotate into and out of a specially provided pocket or ricess 4 in the door, as seen especially 'in Fig. 4:. The inner edge of said latch is circular or segmental and has a series of teeth or serrations adapted to be engaged by the spring-pressed shoe 5 on the car and by which the said latch is rotated out of the recess in the door. when the car reaches the landing, thus releasing the door to be opened,

, lock; the car at the landing when the door is closed, and

' may Fig. 5 is a section ofthe latch and Fig.1. The said latch is shown as having two opposite springs 6 connected therewith in such relation as to close the latch the in- "stant'the car starts from the landing and thus lock the door, and the shoe '5 is under a measure of spring pressure on its end sup ',-ing and is provided with initial means for actuating the said looks, so that in the opening of the door both locks are automatically" j-brought into engagement and when closed both locks are automatically disengaged. I Thus, the door has a rack or series of teeth 8011 its bottom edge in engagement with a pinion 9 on the end of a rotatable shaft 10 and'which terminates at thev landing. The said shaft has a worm or thread 11 of long pitch in actuating engagement with a yoke 12 mounted thereon and controlling a thrust bolt 13 at .each end. The said'bolts are supported in suitable keepers in the landing and engage extension rods 14 having heads engaged by said boltsand adapted to be thrust endwise' bythe bolts in such measure as be needed to bring the cable gripping or looking against the cable next beneath or at the V shaped stud 16, or its equivalent, the object in any event being to hold the cable temporarily against movement up or down by the operator 1n .the car or, for that matter,

' by any one else. Movement is conveyed from the said rods or, extension bolts 14' to the said lock 15 through or by means of a cross-bar 1'? which has sleeve supports 18 on its ends in which the extension bolts justment and. support, and a stem 20 centrally on said cross bar 17 piivotally engages one end of a pivoted lever 21 while the other 22 connecting it with A link 24 connects end thereof has a link a bell crank lever 23. said lever with the lower ends of the pivoted lock. 15 for the cable. Spring S serves to reverse or open all said parts when the thrust by primary bolts 13 is relieved and the door is closed. Spirally wound Springs 14 have a threaded ad member 15 into engagement on the bolts 1.4 bear against the heads of said bolts at one end and against the ends of the crossbar 17 at the other end in the said sleeves l8, and serve to communicate thrust from bolts 13 to said bar. hen thrust withdrawn the springs 25 carry bolts ll back to starting position. The lull reipiires only a slight play to perform its function and this arrangement permits the bolts to move a greater distance than the bar.

Thus it follows that when a landing has been made the door is automatically liberated to be opened and the'opening thereof automatically locks the elevator car and the cable. Then in order to move the car and to turn on the power the door must first be closed. This automatically releases both locks and the operation of the elevator proceeds otherwise as if no special safety mechanism were present.

What claim is: 1. An elevator car, a landing door and an operating cable, in combination of mechanism for locking the car at a landing and the said cable simultaneously comprising a rack on the bottom of the said door, a worm screw in the landing and a yoke adapted to said means comprising a screw located in the door landing and a yoke adapted to run thereon and a set of bolts engaged with said yoke and adapted to be thrust into the car, in combination with gripping means for the cable consisting of a fixed stud at the landing, a lever pivoted between itsends on the car and adapted to press the cable against said stud, a pair of bolts in thrusting rela.

tions with said locking bolts, a cross-bar connecting the outer ends of said pair of bolts and a retracting spring for the said bar, and lever and link connections with said bar adapted to operate said locking lever.

An elevator having a car and an operating cable, in combination with a sliding door and means operatively connected therewith and adapted to lock the car at a land ing and to grip the said cable simultaneously, said means comprising a pair of locking bolts supported in the landing and. adapted to engage the car, a worm screw in the landing and a pinion thereon, a rack on the bottom of the door engaging said pinion, a yoke on said screw and engaged at its ends with the heads of said bolts, a pair of auxiliary spring-pressed bolts engaged by said locking bolts and a cross bar connecting the same, a locking lever for the cable and mea'ns to actuate the said lever having operating connection with said cross bar, whereby both the car and the cable are simultaneously locked.

In testimony whereof I aflix my signature 1n presence of two wltnesses.

AUGUST KAMPFE.

Witnesses:

lR. B. Mosnli, M. SorIwAN.

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