US268105A - Elevator-alarm - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

A, 0. JJACOBI.

ELEVATOR ALARM.

Patented Nov. 28, 1882.

Ja /@7444 m :4. man molnllugnplflr. mm a. c

I (No Model.) 2 SAeets-Sheet 2. 4 A. 0. JAOOBI. I ELEVATOR ALARM.

' No. 268,105. Patented Nov. 28, 1882.

N. PETERS. nmwumo n-r. Wzhington. nu:v

ism.

UNITED STATES PATENT OFFICE.

AUGUST 0. JAGOBI, OF SAND CREEK, XVISCONSIN.

ELEVATOR-ALARM.

SPECIFICATION forming part of Letters Patent No. 268,105, dated November 28, 1882,

Application filed October 21, 1882. (No model.)

To all whom. it may concern Be it known that I, AUGUST 0. JACOBI, of Sand Creek, Dunn county,Wisconsin,h'ave invented a new and useful Improvementin Elevator-Alarms, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, makinga part of this specification, in which- Figure 1 is a perspective view of an elevatorbox with my improvements attached. Fig. 2 is an elevator with one side of the casing removed. Fig.3 is a transverse vertical section through 00 w of Fig. 1. Fig. 4 is a perspective view of the driving-wheel with the rocker-arm attached. Fig. 5 is a detached view of the rocker-arm. Fig. 6 is a section of the drivingwheel, showing the slot through which the rocker-arm works. Fig. 7 is a detached view of the crank-lever for operating the alarm. Fig. Sis a detached view of the alarm mechan- My invention has reference to elevators used in mills for raising grain and other mill-stuff; and it consists in devices for giving an alarm whenever the elevator stops from clogging or other cause. Elevators are liable to stop from clogging and other causes. Sometimes they are overloaded with grain or other mill-stuff. Sometimes the buckets get loose on one side and catch on the elevator-legs. It is also well known that gas in greater or less quantities is always present in elevators, and when the ele vator stops without being noticed the driving pulley or wheel continues to revolve, and by friction with the belt will heat, cause fire and explosion. To prevent such disasters is the object of my present invention.

To enable others skilled in the artto make and use my invention, I will proceed to deof the driving-wheel, as shown in Fig. 2. The inner end of the rocker-arm is bent at right angles to form a crank, for a purpose hereinafter explained.

The coil-spring F is attached at one end to the rim of the driving-wheel, and its opposite end to the rocker-arm, as shown in Fig. 2, so that when the bent end of the rocker-arm is carried toward the shaft of the driving-wheel the coilspring is extended, and when the bent end is released it is drawn again in its normal position by the contraction of the spring. This rocker-arm, extending through the slot and a small distance beyond the surface of the driving-wheel, is necessarily brought in contact with the elevator-belt B.

It is evident from this description that while the belt is moving with the driving-wheel no effect is produced upon the rocker-arm E; but whenthe elevator-belt ceases to move, from any cause whatever, friction is brought 'to bear upon the rocker-arm, which causes it to move upon its pivot and throw back the bent portion or crank 0. Thus by means ot'friction with the belt B and the coil-spring F the crankcis caused to vibrate. When the friction is on, the crank moves toward the center of the driving-wheel, and when the friction is relieved the coil-spring draws it toward the periphery. I will now suppose the elevator-belt to be arrested in its course from clogging or other cause. Friction isimmediately bronghtto bear upon the rocker-arm E, which throws the crank e toward the shaft of the driving-wheel, bringing the crank in contact with the short arm of the bent lever G, which is moved around oneqnarter of a circle, at the same time raising the outer arm, g, through one-quarter of a circle. The lever is then released and allowed to resume its normal position until the next revolution of the wheel, when this operation is repeated, and will be continued as long as the band is stationary and producing friction on the rocker-arm 'E.

To the outer arm of the bent lever G is attached a rod or cord, H, the opposite end of said cord being attached to the coil-spring I, as shown in Fig. 1. To this coil-spring is at tached the alarm-bell J.

The operation of my device is as follows:

Whenever, from any cause, the elevator ceases to operate, the friction of the belt upon the rocker-arm E causes the bent portion 6 of that arm to come in contact with the bentlever G, and that in turn causes the outer end of that to rise and ring the bell as long as the drivingwheel revolves and the elevator-belt fails to operate; but as soon as the elevator resumes its operation the rocker-arm would be relieved from friction, bent lever G would remain undisturbed, and the aiarm-eignals would cease to be given.

In order that the bent lever G may be at all times in the proper position to be caught and moved by the crank c it has its hearingin the adjustable plate K, as shown in Fig. l, and by means of this adjusting-plate the bearing and position of the bent lever B is readily adjusted.

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

1. in an elevator-alarm, the driving-pulley 0, provided with a slot, (Z, in its rim, in combination with the pivoted. rocker-arm E, provided with a rim passing through the slot 61, and having its inner end, 6, bent into a crank at right angles to the plane of its motion, substantially as herein described. I

2. In an elevator-alarm, the driving-pulley 0, provided with the slot din its rim, and carrying the pivoted rocker-arm E, provided with the crank e, in combination with the bent lever G, having its bearing in the adjustable plate K, substantially as and for the purpose set forth.

3. The driving-pulley O, carrying the rockerarm E, in combination with the bent lever G, cord E, and alarm mechanism, substantially as and for the purpose set forth.

AUGUST 0. JACOBI.

Witnesses WILLIAM WOHLRAB, RUDOLPH RUNG.

Images