US1366395A - Rectifier - Google Patents

Description

0. M. LEICH.

RECHNER.

APPLICATION FILED MAR. 24, l9|9. 1,366,395. n Patented Ja11.25, 1921.v

UNITED' STATES PATENT oFFlca. j

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ELECTRIC 00pm, 0l'

, chan 'rs or rectifiers, and more particularly to 'v1 ratory machines of the above type.

* of the current.

My invention has for its object the provision of an improved structure for the contactA elements of such devices. Machines of the above types are utilized to change alternating current to uni-directional current, umdirectional current to alternating current, to vary the frequency and for other urposes when it is necessa to modify the c aracte'r evices of this character have' a vibratory element which' carries a contact or contacts, which vibratory element is frequently called upon to vibrate at a relatively high frequency. The vibratory element controls the change lin the current conditions between the entering and leaving -current and it is ofthe utmost importance that the operations of this vibrator element be uniform and that the contact durations be uniform. Difficulties have generally been experienced with devices of this character dueto a non-uniform operation, dueto burnin out of the contacts and due to an unsatis actory modification of the current.

It is the grime object of my invention to so arrange t this character that the danger of burning the contacts due to non-uniform operation is practicall if. not entirely, avoided; further, that t eI duration of the contact be uniform and in fact that the entire operations of the device be of such a character as to insure uniformit of operation.

I will describe a orm which my invention may take more in detail by referring to the accompanying drawing, in which- Figure 1 is a front view of a converter e contact portions of devices of .anaammmn mm. Patented Jan. 25, 1921. Appllcationiled larok 94, 1819. -Serial llo. -884,528. Y

constructed in accordance with my invent1on; Y

Fig. 2. is a sectional view on line 2-2 of Fig. 1, and l ig. 3 is a view somewhat diagrammatic illustrating one form of circuit arrangement 1n which my improved device finds application. My improved device as herein illustrated 1s mounted upon a suitable bracket 10, which bracket supports the two electromagnets 11 12. The bracket also carries arms 13 and 14, which arms are insulated from the `bracket and carry stationary contact elements 15 and 16. These contact elements are mounted upon screw threaded bolts 17 whlch coperate with nuts 18 so that these contacts 15 and 16 may be permanently ad- 'usted into any desired position. The

racket 10' also supports a permanent mag'- net 19 which copera'tes with the electromagnets to polarize the armature 20 of the device. Thls armature is suitably held between the fingers 21 and 22 of the nonmagnetic plate 23. The plate 23 is adjustably securedin position upon the extremities of the nets 11 an 12. The armature 20, co erates with these protruding pole ieces. he armature, as stated, is pivota y mounted and carries an arm 25, which arm is secured to the protruding ,stem 26 of said armature by the set screw 27. The arm carries at its lower extremit a substantially U-shaped element `consistang of the coperati parts 28 which are mounted on opposite sides of a distance piece 29 ixedly secured to the arm 25. The U-shaped eli'ent supports a contact carrying` structure 30 U- shaped in form, this structure bein rigid-ly 'secured at its extremities to the U-ape'd structure 28 by the screws 31 and 32 respectively. The screws 32 at the same time serve to carry suitable weights 33 which it is desirable to use in connection with the vibratory portion of the device. v.The U-shaped contact carrier 30 bulges outwardly` slightly below the weights 33, as'more clearly seen'from an inspection of Fig. 1, and carries contacts 34 at its lower' portion, which lowerrportion is not backed by the elements 28. ere is thus a certain yiel from side tions of the vibratory part of the vice. The element 30 however is rigid enough so that for ractical purposes the contacts 34 remain re atively to each other in the same position. The contacts 34 are both in electrical connection with the element 30 and co- 28. Thus, if t e contact 34 has touched the contact 15 of the vibratory portion, and the device then moves farther to the right, such movement does not increase the air gap between the contact 34 and the contact 16.

I find it of considerable importance to have the two contacts 15 and 16 quite a considerable distance apart for practical purposes, thus making 1t of the utmost importance t0 have the separated contacts 34. It will also be noted that by virtue of this construction the pressure against contact 15 will be the same as the pressure against contact 16 as the pressure is due to the combined ielding of both arms of the element 30. 's is of great importance in order to t uniform contact pressure. A

ferring more articularly to Fi 3, I show my improv device as 'appli toa s m for rectifying the current from an C. source 35 so as to charge a storage battery 36. The alternati current is led through the primary 37 o ay transformer and -currentis also supplied from this source to the electromagnets 11 and 12 through the -agency of the conductors 38 and 39, a condenser 40 being interposed. The secondary winding 41 of the transformer is by virtue of the conductors 42 and 43 connected respectively to the contacts 15 and 16. One terminal of the storage battery is co by means of conductor 45 with the vibratory e ement of the device which includes the contacts 34. This circuit arrangement is merely shown for illustrative purposes to indicate one manner of use to which my device may be put. The vibratory element vibrates in accordance with the alternations of the current from the alternating current source so that a uni-directional current flows throu h the storage battery 36 as will be family understood by than; skilled in the art.

Although I am unable to state definitely the theory or reason why the form of structo side of said. 'element 30 rela 'vely to the remaining porumass ture herein accomplishes the result stated and while the reasons hereinbefore outlined ma or may not be the correct ones, yet I belleve that one reason why the lstructure solves the problem is due to the use of two springs, independently mounted, which together carry the contact or contacts. One spring alone may have a tendency to vibrate on its own account, whereas two independently mounted springs tied together at their freeends would not have suc tendency because of their differentl rates of vibration.

From the description thus given of m improved device, its mode of o ration wi l be readily apparent. I claim, owever, not

l this articular structure but all forms amiI mod' cations thereof which are within the scope of the appended claims:

1. A vibratory converter of the character described having a pair of relatively stationaly contacts, a pair of movable contacts space apart and coperating with said statlonary contacts, a vibratory element, and a U-shaped framework carrying said movable contacts yieldably mounted upon said vibratory element.

2. A vibratory converter of the character described having a pair of relatively stati nca'iy contacts, a-pair of movable contacts spa apart and co rating with said statlonary contacts, a vi ratory element, and a U- haped framework carrying said movable contacts mounted upon said vibratory element.

3. A device of the character described having a relatively stationary contact, a vibratory element lncluding a substantially rectangular framework with yielding sides, and a contact coperating with said first contact carried b one of said sides.

4. A device o the character described com risin a vibratory element including a su stantlally rectangular framework wit yielding sides, contacts mounted upon said yielding sides, a pair of relatively stationary contacts coperating with the aforesaid contacts, and a framework for supporting said stationary contacts upon opposite sides of said framework.

5. A device of the character described comprising a pair of relatively stationary contacts, a pair of ieldingly carried movable contacts Space -apart and coperating each to each with said stationary contacts, and means for supporting said yieldingly carried contacts consisting of two arms made of resilient material secured together at their extremities.

6. A device of the character described comprising a pair of relatively stationary contacts, a pair (fedyieldingly carried movable contacts spa apart and coperating each to each with said stationary contacts, and means for supporting said yieldingly. carried contacts consisting of two arms made of resilient material secured to ther at their extremities, the said contacts eing mounted upon said arms near one extremity thereof.

7. A device of the character described comprisingarelatively stationary contact, a movable contact, andtwo springs spaced apart, on one of which said movable contact is mounted, said s rings at one extremity thereof being suis mounted and having their other extremities fastened together.

In Witness whereof, I hereunto Subscribe my name this 11th -day of March, A. D.,

OSCAR M. LEICH.

tantally rigidly 10

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