US521589A - Safety attachment for elevators - Google Patents

Description

(No Model.)-

F. W. JAN-DELL. SAFETY ATTACHMENT EOE ELEVATORS. No. 521,589.

Patented June 19, 1894.

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UNITED STATES,

PATENT OFFICE.

FRANK W. JANDELL, OF MAPLETON, NORTH DAKOTA.

'-SAFETY ATTACHMENT FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 521,589, dated June 19,1894.

Application filed April 17, 1894- Serial No. 5071 O 11105811) A To all whom it mag concern.-

Be it known that I, FRANK W. J ANDELL, of Mapleton, in the con nty of Cass and State of North Dakota, have invented certain new and useful Improvements in Safety Attachments for Elevators; and I do hereby 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.

My invention relates to an improvement in safety attachments for elevators, the object being to provide a device capable of being attached to the ordinary passenger and freight elevators, and adapted to be operated. by the weight of the car being transferred from the ordinary hoisting cables or ropes, to a safety rope attached to the safety attachment.

My invention consists in the parts and combinations of parts as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation of a section of an elevator embodying my invention. Fig.2 is a view of one of the devices'detached, and Fig. 3 is a view of one form of device for holding the levers elevated.

A represents the rack bars bolted to guides, not shown, and extending approximately throughout the length of the guides, and B is the car. 7 to any make of car, I prefer cars having a compartment or space between the ceiling and roof, and locate the safety devices in such compartment as shown, but the safety attachment can be located below the ceiling or above the ceiling as desired, or as necessity demands. V

As the safety devices on the two sides are alike a description of one will suffice for both.

C is a plate provided with one or more, (in the present instance three) holes a, for the passage of the catches 19. These catches or bolts b are integral with the plate D, and pass through the holes a in plate 0, the ends of said bolts or catches being enlarged for preventing the complete withdrawal of the bolts 1), from plate 0. The plate 0 is secured by bolts or otherwise to the side of the car B, and the latter is provided with openings (1 registering with the holes in plate 0 for the passage of the ends of the bolts 1). Thebolts While the device can be attached or catches are preferably located a distance apart equal to the length of a tooth of the rack bar, so that when the bolts or catches are operated each will rest on a tooth, thus throwing the weight of the car and its load on the series of teeth or catches and not on any one of them.

Projecting inwardly from the plate D is the sleeveorcylinderEcarrying the spiral or other spring F, which latter forms a yielding abutment for the plunger G,which is located within the sleeve or cylinder E, and is locked therein against outward displacement by any suitable means. This plunger G is connected byahinge' joint with the lever H which latter projects inwardly toward the vertical center of the car and is connected by hinge or other loose joint to the inner end of the other lever H, which leads from a similar safety attachment located diametrically opposite the one described. The levers H when in their normalpositions rest with their meeting ends considerably below the level of the sleeves D, as shown, and are connected near their meeting ends to the lower end of the safety rope I. This safety rope passes up alongside of the hoisting ropes J, and may lead to the drum, weights, or other device which actuates the hoisting ropes. By this arrangement it will be seen that should the hoisting rope or ropes break, the weight of the car will be transferred to the safety rope, (which under ordinary conditions runs slack,) and operates to elevate the meeting ends of the lovers H, and each lever taking a bearing against the other is caused to,

' essarily moving the bolts or catches their full throw, thus if the bolts in moving should engage the extreme inner edges of the teeth, instead of wedgin g the parts, the springs would simply be compressed and as the bolts moved downwardly they would be forced out by the springs and engage the teeth next below them.

The safety rope I wouldhardly be of sufli- ICO cient strength to sustain the weight. of the car and would probably be broken by the strain thereof after elevating the levers, and hence to prevent the levers from falling and thus withdrawing the bolts, I have provided the lock K, which consists simply of an inverted U shaped bracket suspended from the roof of the car or other convenient part above the levers H, and provided with the spring tongues it, which latter open upwardly. Thus when the levers II are elevated by the safety rope, one of them enters between the members of the inverted U-shaped bracket K and elevates the spring tongues 70, which latter fall to their normal positions with their ends against each other, as shown in Fig. 3, as soon as the lever passes them, and lock the lever in ahorizontal position. After the ropes have been repaired this lever is released, and the weight of the levers operates to withdraw the bolts.

If desired 1 can employ guides K located on opposite sides of one or both of the levers H, for preventing any swinging motion of the levers and to cause them to move in a vertical plane while shooting the bolts.

From the above construction it will be seen that should the bolt or bolts on one side of the elevator, become wedged from any cause whatever, and refuse to work, the strain or pressure of the two lovers would then be transmitted to the device on the other side, and as the safety devices on one side are usually suflicient to sustain the weight of a car,

.it will be seen that with this device all danger of accident is avoided so long as one of the attachments is in working order.

ed to pass through the side thereof, a spring bearing at one end against the base of the behind each spring, of a lever connected to 1 each plunger, the two levers being connected at their inner ends, and a safety rope attached to one of said levers, substantially as set forth.

3. The combination with bolts located 011 opposite sides of an elevator, a sleeve carried by each set of bolts, a spring in each sleeve and a plunger bearing against each spring, of a lever connected to each plunger the two levers being connected at their inner ends and a safety rope attached to one of said levers, substantially as set forth.

4. The combination with bolts located on opposite sides of an elevator, asleeve carried by each set of bolts, a spring in each sleeve and a plunger bearing against each spring, of a lever connected to each plunger, the two levers being connected at their inner ends, a safety rope attached to one of said levers, and a lock for holding the levers elevated after they have been raised by the safety rope, substantially as set forth.

5. The combination with plates C having holes therein and adapted to be secured to an elevator car, plates D each having a series of bolts passing through the holes of its respective plate C, a sleeve on the inner face of each plate D, a spring in each sleeve and a plunger bearing against each spring, of the levers connected to the plungers and to each other and safety rope for raising the levers to approximately horizontal positions, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

FRANK W. JAN DELL.

Witnesses:

W. MARTIN JONES, CLYDE W. KNAPP.

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