US777296A - Safety attachment for elevators. - Google Patents

Description

PATENTED DEC. 13, 1904.

APPLICATION FILED JULY 26,1904.

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PATENTED DEC. 13, 1.904.

A. MATTER. SAFETY ATTAGHMENT POR ELEVATORS.

APPLICATION FILED JULY 25, 1904.

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UNITED STATES Patented December 13, 1904.

PATENT OEEicE.

HALF TO J S. MATTER, OF KIRKSVILLE,

MISSOURI.

SAFETY ATTACHMENT FOR ELEVATORS.-

SPECIFICATION forming part of Letters Patent No. 777,296, dated December 13, 1904.

Application filed July 25, 1904.

To all whom it may concern.-

Be it known that 1, ANDREW MATTER, a citizen of the United States, residing at'Oonnelsville, in the county of Adair and State of Missouri, have invented certain new and useful Improvements in Safety Attachments for Elevators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in safety devices for elevators.

The object of the invention is to provide means whereby when the cage has been raised to a predetermined point the cable will be automatically released from the same, thereby preventing the further raising of the cage, thus relieving the occupants of the cage or the elevator apparatus from danger of being injured.

With this and other objects in View the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1,is a front elevation of an elevator-tower arranged above a mine-shaft. Fig. 2 is a side elevation of the same, showing a sectional view of the mine-shaft and the arrangement of the mechanism at the lower end of the same. Fig. 3 is an enlarged vertical sectional view through the safety device for connecting the cage with the cable, showing the parts in the position they assume when engaged with the hoistingcable. Fig. 4 is a similar view showing the parts when tripped and in a position of release; and Fig. 5 is a detail view of the retractable tripping device for releasing the cage-hook, showing the same retracted in full lines and projected in dotted lines.

Referring more particularly to the drawings, 1 denotes the supporting frame or tower, which is arranged above and extends down into a mineshaft 2. 3 denotes the car or cage, which is arranged in the tower 1 and adapted to be raised and lowered. into said Serial No. 217,979. (No model.)

I shaft by means of a hoisting-cable 1, which passes over a pulley 5, journaled in the upper end of said frame or tower, and is connected at one end to the car or cage and at its opposite end to any suitable hoisting mechanism. (Not shown.) These parts may be of the usual or any suitable construction.

Secured to the top of the cage 3 is a safety device 6, by which the cable 4 is attached to the car or cage 3. The safety device 6 consists of two oblong plates 7, which are spaced apart and secured together by rivets 8 and are connected at their lower ends to an upwardly-projecting plate or bar 9, secured to the upper side of the elevator-cage, as shown. In the upper ends of the plates 7 are formed alined recesses 10, and into one side of said recesses between the plates 7 is pivotally mounted a hook 12, the bill of which is normally adapted to projectacross and to close the upper ends of the recesses 10. The lower end of the hook 12 is pivotally connected to one end of a pair of toggle-levers 13, which are pivotally connected at their opposite ends between the plates 7 near the opposite sides of the same.

Between the plates 7, below the lower end of the hook 12, is pivotally connected a lever 14:, one end of which is adapted to project laterally beyond the sides of the plates 7 and the inner end of which is bifurcated and pivotally connected to a bar 15, the lower end of which is adapted to normally rest upon the upper end of the plate or bar 9. The upper end of the bar 15 is adapted to project upwardly between guide pins or lugs 16 and to engage the lower side of the toggle-levers 13 immediately below their joint or point of connection.

When the hook 12 is in its normal position and in engagement with the eye or loop at the lower end of the hoisting-cable 1, the toggle-levers .13 will be in the position shown in Fig. 3 of the drawings and will rest on or bear against the pins or lugs 16 and when in this position will hold the hook 12 across the recesses 10 and in engagement with the hoisting-cable. The bar 15 is now at its lowest point, the lower end of the same resting on the plate or bar 9 and the upper end thereof being in engagement with the lower side of the toggle-levers, as hereinbefore described. The inner end of the lever 14 being pivotally connected to the bar 15 with its outer end projecting upwardly and laterally beyond the plates 7 will be in position to be engaged by a suitable trip device and when so engaged will be rocked upon its pivotal connection with plates 7, thereby raising the inner end of the same and also the bar 15, causing the upper end of said bar 15 to slide between the v lugs 16 and to force the toggle-levers 13 upwardly, thereby rocking the lower end of the book 12 inwardly. thus disengaging the upper end of the same from the hoisting-cable 4 and allowing said cable to continue upward, while the cage will remain where it is.

In order that the lever 14 may be actuated to disengage the hook 12 from the hoistingcable when the cage has for any reason been carried beyond its proper stopping place and where further upward movement of the same would endanger the passengers carried therein or where further upward movement of said cage might injure the tower or supportingframework 1, trip devices have been provided to engage the lever 14 and cause the same to disengage the hook 12 from the hoisting-cable 4. In elevators used in connection with mine-shafts in which ore is raised and automatically dumped into hoppers a retractable tripping device 17 is connected to the tower 1 at a point where the same may be engaged with the lever 14 before the cage reaches the point where it is automatically dumped, so that should the same contain passengers instead of ore the passengers would not be placed in danger of being dumped into the hopper should the cage fail to stop at the proper landing or place for discharging said passengers.

The trip device 17 consists of a bail-shaped bar 18, which is pivotally connected near its ends to the upright posts of the frame or tower 1. The ends of the bar 18 are bent laterally at right angles to the bar. To one of said angularly-bent ends is connected the upper end of a cord or cable 19, which extends downwardly to the lower end of the mineshaft, where it is connected to one end of a lever 20, pivotally connected to the frame 1, as shown. A similarly-arranged cord or cable 21 is connected at its upper end to the bailshaped portion of the bar 18 and at its lower end to the lever 20 on the opposite side of the pivotal connection of said lever from that to which the end of the cord or cable 19 is connected, so that when said lever is rocked in one direction or the other the same will draw upon either the cord 19 or 21, thereby rocking the bail-shaped bar 18 to project the same into or out of the path of movement of the engineer neglect to stop the cage at the proper point the lever 20 may be actuated to project the bail-shaped bar 18, thereby placing the same into position to trip the lever 14, and thus disengage the hook 12 from the hoistingcable, which will stop the further upward movement of the cage. The opposite angularly-bent end of the bar 18 from that to which the cable 19 is connected forms a stop which engages the side of the posts of the supporting-frame 1, thereby preventing the bar 18 from being moved too far by the lever 20. In order that the lever 20 may be held in its adjusted position, a plate or bar 22 is secured to the side of the frame 1. On said plate or bar is formed upper and lower shoulders or ofisets 23 and 24, with which the ends of the lever is adapted to be engaged to hold the same in position after being actuated to project or retract the bail-shaped bar 18.

In elevators which are not provided with an automatic dumping arrangement the trip-bar 18 may be dispensed with, and in place of the same near the upper end of the tower 1 may be arranged a fixed or stationary trip device, which is here shown as an inwardly-projecting bail-shaped plate or bar 25, which is disposed in the path of upward movement of the lever 14, so that should the cage be hoisted beyond its intended stopping-place the same will be released from the cable 4 before reaching the upper end of the tower 1, thereby preventing injury to the tower, cage, or occupants of the same.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

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

1. The combination with an elevator-tower, of a vertically-reciprocating cage arranged therein, a hoisting-cable, a safety device connected to said cage whereby the same is removably attached to said cable, a projectable and retractable tripping device arranged on said tower, and means whereby the same may be actuated from the bottom of a shaft, to trip said safety device and detach said cable from the cage, substantially as described.

2. The combination with an elevator-tower, of a vertically-reciproeating cage arranged therein, a hoisting-cable, a safety device connected to said cage whereby the same is removably attached to said cable, a bail-shaped bar pivotally connected near its ends to the end of the lever 14, so that should the hoistl tower-frame to form a projectable and re- 5 ing mechanism become unmanageable or the tractable tripping device said pivoted bar hav- I 3 ing angularly-bent ends, an operating-lever pivoted on the lower end of the tower-frame, and cables connecting said pivoted trippingbar to said lever whereby the same may be projected and retracted into and out of the path of movement of said safety attaching device, substantially as described.

3. The combination with an elevator-tower, of a vertically-reeiprocating cage arranged therein, a hoisting-cable, a safety device secured to said cage, whereby the same is connected to said cable, said safety device consisting of parallel plates spaced apart and secured at their lower ends to a plate or bar projecting upwardly from said cage, and having recesses formed in their upper ends, acable-engaging hook pivotally mounted between the upper ends of said plates, toggle-levers pivotally connected at one end to the lower extended end of said hook and at their opposite end to said plates, a bar adapted to en gage said toggle-levers and cause the same to disengage said hook from the hoisting-cable, a lever pivoted between said plates and c011- neeted at its inner end to said bar, and tripping devices arranged on said tower-frame to engage the outer end of said lever and rock the same, thereby automatically disengaging said hook from said cable, substantially as described.

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

ANDREW MATTER.

Witnesses:

SAMUEL SHUMATE, A. C. SWEENEY.

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