US1262326A

US1262326A - Automatic interupter for electromagnetically-operated pawl-and-ratchet mechanism.

Info

Publication number: US1262326A
Application number: US7847516A
Authority: US
Inventors: Georg Grabe
Original assignee: Siemens AG
Current assignee: Siemens and Halske AG; Siemens AG
Priority date: 1916-02-15
Filing date: 1916-02-15
Publication date: 1918-04-09
Anticipated expiration: 1935-04-09

Description

G. GRABE.

' AUTOMATIC INTERRUPTER FOB ELECTROMAGNETICALLY OPERATED PAWL AND RATCHE'T MECHANISM.

APPLlCATlON FILED FEB. I5. I9Ie.

1,262,326. Patented Apr. 9, I918.

UNITED STATES PAEENT orrron.

GEORG GRABE, OF NIKOLASSEE, NEAR BERLIN, GERMANY, ASSIGNOR TO SIEMENS & HALSKE AKTIENGESELLSCHAFT, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.

AUTOMATIC INTERRUPTER FOR ELECTROMAGNETIOALLY-OPERATED PAWL-AND- RATCHET MECHANISM.

To all whom it may concern:

Be it known that I, GEORG GRABE, a citizen of the German Empire, and residing at Nikolassee, near Berlin, Germany, have invented certain new and useful Improvements in Automatic Interrupters for Electromagnetically-Operated Pawl-and-Ratchet Mechanism, of which the following is a specification.

This invention relates to automatic makeand-break devices for electromagnetically operated pawl-and-ratchet mechanisms, and a primary object is to provide that the pawland-ratchet mechanism is certainly fed one whole step Whenever the .armature is attracted by its magnet even when the pawland-ratchet mechanism operates rapidly, to which end, according to .the invention, the interrupter contact is made and broken at times when the armature is not moving or as near such times as possible.

- I attain this endby elastically connecting the armature in such a manner with a lever arm moved by it that the latter lags behind the moved armature.

In a preferred form of such an interrupter or make-and-break device a momentum is imparted to a lever arm during the pull on the armature, and the interrupter contact is'thereby broken after the completion of the pull on the armature and is made during the last part of the return movement of the armature or only after the completion of this movement.

To these ends, the invention consists in the construction, arrangement and combination of parts described hereinafter and pointed out in the claims.

One illustrative embodiment of the in-- vention is represented by wayof example in the accompanying drawing, wherein Figure 1 is a side elevation,

Fig. 2 is an end elevation, and

Fig. 3 is a top plan view of an improved interrupter or make-and-break device according to the invention.

Referrin to the drawing, in the frame a is journa ed an axle b which carries fast on it a ratchet Wheel 0 and the arm d, for

example the-switch arm of a selector. The

Patented Apr. 9, 1918.

Application filed February 15, 1916. Serial No. 78,475.

A. lever arm m, preferably in the form of a leaf spring, is firmly connected at one end with the armature near its axle; the other end of this arm carries a longitudinally adjustable weight n. The contact springs l0, Z and the spring m and the armature f are located approximately parallel to one another and all in the same plane of movement. The free ends of the springs Zr, Z and m are directed in the same direction and the springs is, Z are located be tween the spring 121 and the armature f.

This arrangement is particularly simple and preferable because all the parts are readily accessible and adjustable. In addition, a leaf spring is the simplest form of the lever arm m, and its attachment directly to the armature is the simplest mode of attachment thereof.

The described device operates as follows lVhen the circuit containing the electro magnet e and the contact springs 7r, Z has been closed the arn'lature f is attracted and the spring m is moved in the direction of movement of the armature. The weight n has imparted to it a certain speed, and owing to the momentum of this weightthus created the free end of the spring m is moved farther than the stroke. of the armature f. The spring in presses by means of an insulated pin 0 on the contact spring 7:, which is only weak relatively to the spring m, and breaks the contact 7) and the circuit of the electromagnet e. Consequently, the armature returns into its normal position under the influence of the spring z" without the weight it immediately following the return movement of the armature. The direction of motion of the weight is reversed only after the armature has almost or quite returned into its normal position. The contact p is then made and the circuit of the electromagnet is closed again, whereupon the described cycle of operations is repeated until the circuit of the electromagnet is operated at some other place, say by the selector. I

The stroke of the armature can be' adjusted by a stop 1". This also determines the momentum imparted to the weight a when the armature is attracted, and thus the throw of spring m. Further, this momentum can be varied by shifting the weight n longitudinally on the spring m.

The frequency of oscillation of the armature is simultaneously determined by these adjustments.

Having thus described my invention I claim as new and desire to secure by Letters Patent of the United States 1. In a make and break device, the combination with an electromagnet carried by a frame, a spring influenced armature, contacts in circuit with said electromagnet, resilient springs carrying some of said contacts, all of said contacts being supported by said frame, of an elastic lever arm loaded at one end and having its other arm firmly connected With said armature and being adapted to actuate said contacts, said lever adapted to lag in phase behind the movement of-said armature and to determine its oscillation frequenc 2. In a make and break evice, the combination with an electromagnet carried by a frame, a spring influenced armature, contacts in circuit with said electromagnet, resilient springs carrying some of said contacts, all of said contacts being supported by said frame, of an elastic lever arm loaded at one end and having its other arm firmly connected with said armature and being adapted to actuate said contacts, said lever adapted to lag in phase behind the movement of said armature and to determine its oscillation frequency, and to swing through an amplitude larger. than that of the armature.

3. In a make-and-break device, the combination with an electromagnet, a springinfluenced armature, a pair of contacts in v the circuit of the electromagnet, one of said contacts being carrled by a spring, of an elastic lever arm loaded at one end and having its other end firmly carried by the armature and provided with means for actuating said contact carrying spring, the said armature, contact spring and lever arm being located substantially in one plane, the contact spring being between the armature and the lever arm, whereby the contact of the contact spring is broken after the armature has been attracted by the electromagnet and is made only at the end of the return movement of the armature into its normal position.

4. In a make and break device, the combination with an electromagnet, a springinfluenced armature and apair of contacts in the circuit of the electromagnet, one of said contacts being carried by a spring, of an elastic lever arm loaded at one end and having its other end firmly carried by the armature butada ted to oscillate independently thereof and eing provided with means for actuating said contact-carrying spring, said armature, contact spring and lever 'arm being located substantially in one plane, the contact spring being between the armature and the lever arm, whereby the contact of the contact spring is broken after the armature has been attracted by the electromagnet and is made only at the end of the return movement of the armature into its normal position.

5. In a make and break device, the com bination with an electroma net,a spring-influenced armature, a pair 0? in the circuit of the electromagnet, one of said contacts being carried by a spring, of an elastic lever arm havin one end firmly carried by the armature or im arting to it the armature motion and adapted to freely oscillate with its other end and being provided with means for actuating said contact carrying spring, a weight movable longitudinally on the other end of the lever arm causing a lag in the lever movement against. the armature movement, whereby, when the armature is attracted, the lever arm opens the contact spring only at the end of the armature stroke and admits of the contact being made only at the end of the return movement of the armature into its normal position.

In testimony whereof I have signed my name to this specification.

GEORG GRABE.

contacts located