US1164001A - Electric-circuit controller. - Google Patents

Description

H. D. JAMES.

LECTRIC CIRCUIT CONTROLLER FILED MAY 23.1908.

APPUCATION Patented Dec. 14, 1915.

LEG-L001.

2 SHEETS-SHEET 2.

INVENTOR ATTRNFv UNITED STATES PATENT OFFICE.

HENRY 13. JAMES, 015 PITTSBURGH PENNSYLVANIA, ASSIGNOLR BY MESNE ASSIGN- MENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EAST PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

ELECTRIC-CIRCUIT CONTROLLER.

T (ZZZ whom it may concern.

Be it known thatl, T'TENRY D. Jamns, a-

of Pittsburgh. in the county of Allegheny and State ct Pennsylvania, have invented a new and useful improvement in Electric- Circuit (li'mtrollers, of which the following is a specification.

' ention relates to electric circuit and it has for its object to provide a device or this character that shall be simple and durable in construction and specially adapted for controlling small motors such as are treip'ieutly employed for driving" textile machinery.

My improved switching device is very compact and may be easily repaired or replaced, and it also ditt'ers from the controllers ot the prior art in various important particulars. I Figure l of the accompanying drawings is an elevation. with the supporting and in-- closing parh shown in section on a line TT of Fig. 2. o a circuit controller constructed in accordance with my invention, and Fig.

2 is a plan view of the controller shown in Fig. 1 the inelosing' casingbeing); shown in section on a. line ll-ll of Fig. 1, to disclose the operating" parts.

Rotter-ring to the drawings, the controller here illustrated has an inclosing casing 1 composed of a top casting 2 and a heet,-

and comprises a plurality of metal tank 3 'wardlv projecting lugs S) and of the top casting; 2 by means oi bolts 1]. and the corn tact-bearing shafts 12 and 13 are supported thereby and project dewnwa'rdly therefrom.

The upper end ll of the shaft 12 projects into a. hole 15 in the supporting casting 8 and is rigidly secured in position by a dowel pin. 10. The major portion oil the shaft 12 substantially square in cross ection and provided with a sleeve 17 of insulating material. The shaft 13 is similarly supported by the casting except that it projects tin-ouch a hole and is journ'aled therein, the crapk arm upper end.

The top walloit the casting 2 is provided with a boss having a hole 21 that is sub- Specification of Letters Patent.

6 being secured. to its stantially in alinement with the shaft 13 and serves as a bearing for a short shaft 22 that forms a part of the crank arm 7 and is provided with an operating handle 23. The outer end of the crank arm 7 is provided with a downwardly projecting pin 25 and the outer end of the crank arm 6 is similarly provided with an upwardly projecting pin 26, the said pins being connected together by a helical spring27, which holds the crank arm 6 against a stop 19 when the handle 23 is in position min Fig. 2.

A terminal block 28 of insulating material is secured tothe base plate 8 above the shaft 12 by means of bolts 29 and is provided with a plurality of terminal. binding posts 30. The top'casting 2 is provided with an opening directly above the terminal block 28 over which is fitted a detachable cover plate 31- in order that the connecting leads may be readily secured to, or detached from, the terminal posts Each of the stationary terminal members 1 comprises a member 35 of U-shape which is fitted upon the insulating sleeve 17 and a contact strip 36 which is securedto the ends of the U-shaped member by screws 37.

Each U-shaped member 35 is provided with. a boss 38 to which a terminal clip 39, is fas tened, suitable conductors (not shown) being interposed between said terminal clips and the terminal posts 30. The several sta-' tionary terminal members t are separated byarc shields or spacing plates 40 which are also secured to the U-shaped' members 35.

Each of the movable Contact fingers 5 comprises a base &l,'which is secured to the Patented Dec. 14, 1915.

Application filed May 28, 1908. Serial No. 434,837.

insulated rod 13 by a clamping screw 31 a;

r i'l rigid arm l2, and a resihent arm 43 having a contact'block 4:41 at its outer end. The resihent arm 43 is secured to the r gid arm 42 near the base ll by an adjusting bolt 45 and movement of the conta'iot block 4:4: with reference to the outer end of the arm 42 may be limited by a screw 46.

Each clamping screw 31 is provided with a clip 32 from which a. conductor (not shown) leads to a corresponding terminal post 30, there being a terminal post for each finger as well as one for each terminal member l. When. it is desired to close the circuit, the handle 23 is moved from position a to position I), thus placing the spring 27 nnder'fireater tensiql and, at the same ols ill

time, swinging it upon the pin 26 as a can ter until it passes the axis of the shaft 2:2 when it will quickly move the crank arm 6 away from its stop 19 and thus throw the fingers into engagement with the corresponding contact strips 36, the reverse or opening movement being a similar snap movement.

Blocks 47 project inwardly from the walls of the tank 3 at diametrically opposite points and are provided with bolts 48 to i'it into recesses s9 and 50 in the lugs 9 and 10 of the casting 2 and clamp the blocks and lugs together.

in service, the controller or switch illustrated is usually secured to a vertical. wall or plate by bolts or other suitable means which secure the top casting 2 in position. It is therefore possible to quickly and easily remove the entire switching; mechanism by first loosening the boltsell and removing the tank 3 and then unscrewing the bolts 11 by Which the casting or supporting plate 8 is secured to the lugs 9 and 10.

Since the spring .27 is provided with open hook ends to engage the pins and 26, it Will not interferewith the removal of the base plate and the parts supported thereby.

' t will be readily understood that. in case of accident to the controller, the operating parts may be quickly and easily replaced by duplicate parts and, since, in textile work, it is desirable to en'iploy a large number of such switches at various points about a ma.- chine, the advantages of this arrangement are readily apparent.

It is conceivable that various structural modifications may be effected within the scope of my invention, as defined in the appended claims.

I claim as my invention:

1. in a sivitcl'iing device, the combination with a horizontal base plate and two downwardly projecting shafts, one of which is rigidly and the other of which is rotatably supported by said base plate and is provided with a crank arm, of a. set of contact terminal members secured to the rigidly supported shaft. :1 set of resilient contact fingers secured to the rotatably supported shaft, an operating handle having a crank arm and a spring connecting the free ends of the crank arms together for imparting a snap movement to the rotatably mounted shaft.

'2. in a switching device, the combination with a hollow top casting, a horizontal plate detachably secured thereto, a stationary shaft secured to the plate and projecting downwardly therefrom, and contact terminal members secured to said shaft and insulated therefrom, of a second shaft substantially parallel to the first and having a substantially cylindrical upper end which projects through a hole in the horizontal plate and is journaled therein, a crank arm secured to the upper end of the shaft, contact lingers secured to the shaft below the plate, an operating crank arm rotatably sup ported by said casting, and resilient means for operatively connecting said crank arms together.

3. A controller comprising a casing, a base plate removably secured to said casing, a set of stationary contact terminal members, and a set of movable contact terminal members supported by said base plate, an operating handle and a crank arm'mounted on said casing, a crank arm rigidly connected to said movable contact tern'iinal members. and a spring to the respective ends of which said crank arms are dctachably connected.

In testimony whereof, I have hereunto subscribed my name this 16th day of May,

HFNRY D. JAMES. \Vitncsses lflnwm Luna, BIRNEY llnzns.

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