US1572804A - Starter for electric motors - Google Patents

Description

Feb. 9,1926. M 1,572,804

I c. LEY

STARTER FOR ELECTRIC MOTORS Filed March 28 1925 1771 31; 3 7 C. A 7, I

Patented Feb. 9, 1925.

NITE STATES ?A l"Ef\ 'i OFFHZE.

CHRISTIAN LEY, OF GLAUoI-LAU, GEBTVIANY,ASSIG1\TOR TO THE FIRM OF ALOS AP- GESELLSGHAFT MIT BESGI-IB-ANKTEE HAFTUNG, OF GLAUCHAU,

STARTER FOR ELECTRIC MOTORS.

Application filed March 28, 1825. Serial No. 19,099.

To all whom it may concern.

Be it known that T, Cr-nusrmn Lnr, a citizen of Germany, residing at Glauchau, Germany, have invented certain new and useful improvements in Starters for Electric Motors, or" which the following is a specification.

The present invention refers to a starter for one phase-, two phase-, and three phasealternating current motors and for continu one current motors, which has the advantage over the starters known heretofore in that between the handle and the contact lever an insulating disk is iinroduced, which may have any size and be of any thickness for giving a good protection at any strength oi? current and tension without impairing the insulating effect by screws or bolts, because the connection between the handle and the insulating disk as well as the connection between the contact carrier and the insulating disk is solely produced by coupling or engaging members, which in a manner known per se can be brought out of contactby movementin an axial direction, so that the complete starter can be taken apart and put together again.

In the drawing by way of example a starter is shown.

Fig. 1 is an elevation of a starter parts being shown in section; v

Fig. 2 is a plan View of the same.

In the drawings, fixed contact laminations 1 are mounted on a base plate 2, from which rises a fixed spindle 3 having screw-threads its lower end for nuts 1, by which the spindle 3 is fastened to the plate 2. On this spindle a hand wheel 5 is rotatably mounted, the boss 6 of which has at its lower end a laterally flattened or square part 7. Moreover, on the spindle 3 an insulating disk 8 is rotatably mounted, which by the aid of coupling members or pins 9 engages notches 10 in a cap 11, which at the upper part has a square hole to engage the square part 7 ot the hand wheel. The lower face of the insulating disk 8 rests on a movable contact carrier comprising a ring 13 surrounding the spindle at a distance and three 90 radial arms 12 projecting from said ring and adapted to slide with their contact faces 14 over the laminations 1 on the base plate. The ring 13 or" the contact carrier 12, is provided with pins 15, which engage in corresponding perforations in the lower surface of the member 8. lVithin the cap 11 is a spiral spring 16, which bears against the upper surface of the disk 8 and against the lower face of the top wall at the cap 11, which is prevented from moving upwardly by the boss 6 of the hand wheel. When the starter is mounted as shown in the drawing the spring 16 is tensione'd. The upward movement or the hand wheel and thus of all moors below and engaging one another is prevented by a pin or plug 17 projecting through the upper end of the spindle.

It will be well understood, that, when the pin 17 is removed, first the hand wheel 5 and thereupon the cap 11, the spiral spring 15, the disk 8 and the contact carrier 12, 13 can be removed trom the spindle one after the other. Nevertheless, when assembled, a good contact pressure will be attained between the contact' faces 1 1 of the arms 12 and the laminations 1 at any time.

Tn the construction shown the lamina tions 1 are arranged in three groups. Also the insulating disk 8 is provided on its periphery with two more contact pieces 19 fastened by screws 18 and connected with one another by a copper bar 20. These contact pieces 19 serve tor switching in and out the auxiliary phase. They are connect ed to the insulating disk 8 and can contact, while rotating therewith, with fixed Contact pieses 21, which by the aid of suitably bent springs are attached to angle pieces 23, which are connected by screws between two groups of the lam' tions 1 to the base plate The current is fed to the laminations 1 the angular arms 23 by the aid :lllti of screws passing through the base plate two nuts being placed on each of these screw-s tor firmly fastening them to the base plate. The rotation oi the contact arms 12 is limited b stops 2b in such a manner that each arm is adapted to move only over one group of laminations.

It is not absolutely necessary to iii: the spindle 3 as it may also be rotatable together with all the parts mounted thereon, while the base plate 2 is held fast. The divers means tor coupling may be construct-ed in a di'l'lercnt manner from that shown, so long as after removing the pin 17 or similar lock ing means, the divers members can be taken oil of the spindle.

The starter as shown and described is well adapted for use in connection with slide ring motors driven by a onephase alternating current. By replacing the insulating disk 8 by a smaller disk which is not provided on the circumference with contact faces serving for switching in or out the auxiliary phase the starter is adapted for a slide-ring-motor driven by a throcphase alternating current. By switching or shunting oii' one group of laminations the starter is converted into a twophase-starter.

I claim:

1. A starter for electric motors, comprising, a base plate carrying stationary contacts, a spindle attached to the base plate, a handle, an insulating disk and a contact carrier rotatable about the spindle, the contact carrier including a ring surrounding the spindle at a distance and carrying contact arms for sliding over the stationary contacts, coupling members on the contact carrier for engaging the insulating disk from below, a single centrally arranged spring exerting central pressure on the upper surface of the insulating disk when the starter is assembled, a cap embracing the spring and provided with notches, coupling members on the upper face of the insulating disk engaging the notches in the cap, and

means causing the cap and handle to rotate together.

2. A starter for electric motors, comprising, a base plate carrying stationary contacts, a spindle attached to the base plate, a handle, an insulating disk and a contact carrier rotatable about the spindle, the contact carrier including a ring surrounding the spindle at a distance and carrying contact arms for sliding over the stationary contacts, coupling members on the contact carrier for engaging the insulating disk from below, a single centrally arranged spring exerting central pressure on the upper surface of the insulating disk when the starter is assembled, a cap embracing the spring and provided with notches, coupling members on the upper face of the insulat in; disk engaging the notches in the cap, and means causing the cap and handle to rotate together, fixed springy contact pieces connected to the base, and contact pieces on the periphery of the insulating disk arranged to contact with the fixed springy contact pieces, rotation of the handle causing simultaneous operation of the contact carrier and of the peripheral contact pieces.

CHRISTIAN LEY.

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