US768814A - Safety device for elevators. - Google Patents

Description

Q Vi/fmeooeo No. 768,814. PATENTED AUG. 30, 1904.

I E. MOSONYI.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR. 6. 1904.

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E. MOSDNYI. SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR. 5. 1904.

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PATENT OFFICE.

EIVIIL MOSONYI, OF ST. LOUIS, MISSOURI. ASSIGNOR TO WILLIAM A. MILLER ELEVATOR MANUFACTURING COMPANY, OF ST. LOUIS, MIS- SOURI, A CORPORATION OF MISSOURI.

SAFETY DEVICE FOR ELEVATORS- SPECIFIOATION forming part of Letters Patent No. 768,814, dated August 30, 1904.

Application filed April 5, 1904. Serial No. 201,641- (No inodel.)

T aZZ whom, it ntay concern:

Be it known that I, EMIL MosoNY1,a subject of the Emperor of Austria-Hungary, residing at the city of St. Louis,in the State of Missouri, have invented a certain new and useful Safety Device for Elevators,of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

In safety devices for elevators in which the device is spring-operated the springs usually remain under tension for a great length of time before they are called into action, and the result is that they often lose more or less of their resiliency, and thus fail to properly act when called upon.

The main object of my invention is to provide means whereby the clamping device may be operated by a weight, and so obviate the difficulty above referred to.

Another object of my invention is to simplify the construction of the devices.

My invention consists in certain novel fea tures and details of construction, all of which will be described in the following specification and pointed out in the claims affixed hereto.

In the accompanying drawings, which illustrate a safety device made in accordance with my invention, together with an elevator to which the same is applied, Figure 1 is a side elevation of the complete device. Fig. 2 is an enlarged vertical section through the lower part of the car. Fig. 3 is a bottom plan view of the parts shown in Fig. 2. Fig. I is a section on the line 4 4: of Fig. 2, and Fig. 5 is an enlarged view of one of the cams for operating the clamping devices.

Like marks of reference refer to similar parts in the several views of the drawings.

is the car of the elevator. Adjacent to this car 10 are guides 11, which may be formed of T-iron, as shown. At the top of the car is a movable guide 12, which cooperates with the fixed guides 11. Atthe bottom of the car are clamping devices, hereinafter to be described, which also cooperate with the said fixed guides 11.

14: is the bottom of the car 10. This bottom 1& is supported by means of sills 15. Secured to these sills 15 are a pair of brackets 16. These brackets 16 support a pair of I- beams 17. The I-beams 17 have secured to them at their ends cross-plates 18, through which pass bolts 19. Pivoted to each of the bolts 19 are a pair of arms 20, provided on their ends with clamping-jaws 21, adapted to cooperate with the web of the guides 11 in order to stop the car. The arms 20 are so pivoted on the bolts 19 that when the said arms are separated the jaws 21 will be brought into contact with opposite sides of the flange of the guide 11. The ends of the arms 20 pass through guide-openings 22 in the brackets 16, hereinbefore described. Between the guide-openings 22 in the brackets 16 is journaled a shaft 24. This shaft 24: has secured to each end a double cam 25. This cam 25 may be secured to the shaft 24: by means of a key 26 or in any other suitable manner. At the central part of the shaft 24 is rigidly secured an arm 27, carrying a weight 28. At the end of the arm 27 is an eye 29, engaged by a hook 30.

When the hook 30 engages the eye 29, the arm 27 is held in a substantially horizontal position, so as to hold the cams 25 in the position shown in Fig. 4;. This will allow the arms 20 to approach each other, so that the car' can readily move without the jaws 21 coming into clamping contact with the guides 11. If, however, the hook.3O is disengaged from the eye 29, the arm 27 will be moved into the position shown in dotted lines in Fig. 4 by the weight 28 and the cams 25, thus tending to force the arms 20 apart, and so bring the jaws 21 into clamping contact with the guides 11.

In order to normally hold the pivoted hook 30 in contact with the eye 29, I provide a coilspring 31, which bears against the said hook and againstadownward projection 32, carried on the bottom 14 of the car. In order to release the hook 30, I secure to its lower end one end of a rope 33, which passes over a pulley 34, carried on the bottom of the car, and thence passes upwardly and around a pulley 35 of a suitable speed-governor 36. This speed-governor may be of any usual form and will not be described in detail. The rope 33 after passing over the pulley 35 of the speed-governor 36 passes down and around a pulley, 37 carrying a weight 38. The rope 33 thence again passes upward and is secured at any suitable point, such as 39, to the car 10.

In the operation of my device the weight 28 is normally held in position by the engagement of the hook 30 with the eye 29, and consequently the car is free to move up and down on the guides 11. If, however, the car attains too great a speed, the speed-governor 36 will clamp the rope 33, so as to prevent same from moving freely over the pulley 35, and consequently the strain of the rope will compress the spring 31 and draw the hook 230 out of engagement with the eye, so that the weight 28 can drop down and through the shaft 24,- move the arms 20 to bring the jaws 21 into clamping contact with the guides 11, so as to stop the car.

It will be seen that my device is very simple of construction and not liable to get out of order and that owing to the use of a weight in place of springs the device is just as efiective after it has been in position for any length of time as when it is first built.

Having fully described my invention, what 1 claim as new, and desire to secure by Letters Patent of the United States, i.s

1. The combination with an elevator-car, of a pair of clamping devices each consisting of a pair of pivoted arms provided with clampingjaws, guides for said arms, a pivoted weight, connections between said weight and arms for actuating the latter to operate said clampingjaws, and means for automatically releasing said weight.

2. The combination with an elevator-car, of a pair of clamping devices each consisting of a pair of pivoted arms provided with clampingjaws, guides for said arms, a rock-shai'tjournaled in said guides, operating connections between said rock-shaft and arms, and means for automatically actuating said rock-shaft.

3. The combination with an elevator-car, of a pair of clamping devices each consisting of a pair of pivoted arms provided with clampingjaws, guides for said arms, a rock-shaft journaled in said guides, operating connections between said rock-shaft and arms, a weight for actuating said rocksnaft, and means for automatically releasingsaid weight.

4:. The combination with an elevatorcar, of a pair of clamping devices each consisting of a pair of pivoted arms provided with clampingjaws, guides for said arms, a rock-shaft journaled in said guides and extending between said arms, cams on said rock-shaft for actuating said arms, and means for automatically actuating said rock-shaft.

5. The combination with an elevator-car, of a pair of clamping devices each consisting of a pair of pivoted arms provided with clampingjaws, guides for said arms, a rock-shaftmounted in said guides and extending between said arms, cams on said rock-shaft for actuating said arms, a weight for actuating said rockshaft, and means for automatically releasing said weight.

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

EMIL MOSONYL [n s] Witnesses:

A. C. JAEGER, FRED HENKE.

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