US355738A

US355738A - williamson

Info

Publication number: US355738A
Authority: US
Publication date: 1887-01-11
Anticipated expiration: 1904-01-11

Description

(No Model.) I 6 SheetsSheet 1. D. WILLIAMSON.

CURRENT COLLECTING DEVICE FOR DYNAMO ELECTRIC MACHINES.

No. 355,738. Patented Jan. 11, 1887.

6 Sheets-Sheet 2 Patented Jan. 11, 1887.

j 'vw cwl oz a {1171 0614 m 6) I 7 (N0 Model.)

D WILLIAMSCN CURRENT COLLECTING DEVICE FOR DYNAMC ELECTRIC MACHINES.

witnesses 6 Sheets-Sheet 3.

D. WILLIAMSON.

CURRENT GOLLEGTING DEVICE FOR DYNAMO ELECTRIC MACHINES. No 355,738. Patented Jen. 11,1887.

(No Model.)

H m w mww r Wm Lama We! Q2 6 Sheets-Sheet 4.

Patented Jan. 11, 1887.

D WILLIAMSON CURRENT COLLECTING DEVICE P03 DYNAMO ELECTRIC MACHINES. No. 355,738.

(No Model.) 6 Sheets-Sheet 5.

D. WILLIAMSON CURRENT COLLECTING DEVICE FOR DYNAMO ELECTRIC MACHINES.

No. 355,738. Patented Jan. 11,1887.

(No Model.) 6 Sheets--Sheet 6 D. WILLIAMSON.

GURRENT GOLLEGTING DEVIGE FOR DYNAMO ELECTRIC MACHINES.

No. 355,788. Patented Jan. 11 1887.

5W0 onto 8 l witnesses PATENT OFFICE.

DAVID WlLLlAllllSON, OF NEW YORK, N. Y.

CURRENT-COLLECTING DEVICE FOR DYNAMO-ELECTRIC MACHINES.

BPECIFICATION forming part of Letters Patent No. 355,738, dated January '11, 1887.

Application filed June 14, 1886.

To all whom it may concern.-

Be it known that 1, DAVID WILLLiMsoN, of the city, county, and State of New York, have invented certain new and useful Improvements in Current-Collecting Devices for Dynamo- Electric Machines, of which the following is a specification, illustrated by the accompanying drawings.

This invention is designed to facilitate the manipulation of the brushes of a dynamoelectric machine, and relates to mechanism by which such brushes may be adjusted and slip ported in desired positions about a commutator. ings, in which- Figure 1 is an end view of my invention applied and adjusted to support a brush in contact with a commutator. Fig. 2 is an end view of the same adjusted and applied to support the same brush not in contact with said commutator. Fig. 3 is a plan View of said brush and the mechanism by which the same is adjusted. Fig. 4 is a section on a a of Fig. Fig. 5 is a section on Z) Z) of Fig. 3. Fig. 6 is a modification of Fig. 5, showing a modiiied construction. Fig. 7 is an end view of my invention in a modified form, applied and adjusted to support a pair of brushes in contact with a commutator. Fig. 8 is asection on c c in Fig. 7. Fig. 9 is a vertical section through the center of the upper brush and brush-holder of Fig. 7. Fig. 10 is a partial section on c e in Fig. 7; and Fig. 11 is an end view of my invention, in a modified form, applied and adjusted to support two brushes, one of which is in contact with a commutator and the other of which is not in such contact.

In Fig. 7 the numeral 1 denotes the commutator of a dynamo-electric machine, whether motor or generator, while 2 is the armatureshaft. 3 is a portion of-a yoke by means of which that shaft is supported, and 4 is a metallic bushing between said shaft and yoke.

In Figs. 1, 2, and 11 the same parts are indicated diagrammatically by concentric circlcs, which are adjacent to the brushes, hereinafter mentioned. Numeral 5 denotes a straight cylindrical brass rod, which has a collar, 6, formed integrally with said rod, and is provided with a terminal nut, 7. This rod passes through a hole in the head 8 of arm 9 of yoke 32, hereinafter described, is insulated Such mechanism is shown in said draw- Serial No. 205,056. (No model.)

therefrom, and is supported thereby at a suit able distance from commutator 1. Head 8 and the material employed to insulate the same occupy all the space between collar 6 and nut 7, so that red 5 cannot move lengthwise in head 8. Rod 5 is also provided with a cylindrical sleeve, 10, which is of sufficient length to accommodatethe brushes, which are to be mounted thereon in the manner hereinafter described, and has an enlargement or head, 11, contiguous to collar 6. Head 11, as seen in Figs. 3, 4, and 5, consists of two collars or annular rings, 12 and 13, which are at right angles to the longitudinal axis of rod 5, are peripherally connected with each other in a rigid manner by bridge 14, and are separated from each other by the intermediate collar, 15, which occupies all the space on rod 5 between

rings

12 and 13, and is held in position upon that rod by set-screw 16. In the outer part of collar 15 are two or more indenta tions or circumferential sockets, 17, adapted to receive the end or point of pin 18, as seen in Figs-4 and 5. This pin is mounted upon bridge 14, radially as to collar 15, in such a position as to be brought successively over each socket 17 of Fig. 4 by the partial revolution of bridge 14 about collar 15. Pin 18 is provided with a spring, 19, which presses that pin constantly toward the center of collar 15. This spring is conveniently located within a tubular extension of bridge 14. Pin 18 is also pro vided with an exposed head or linger-piece, 20. Upon sleeve 10 (see Figs. 1, 2, 3, 5, and 6) are mounted one or more brush-holders, 21, of the general. description following: Each brush- 'holder consists of a pair of clamping-plates, 22, a clamp, 23,

collars

24 and 25, fitted upon sleeve 10, a spring, 26, and a set-screw, 27. The brush 28 consists of a number of rectangular plates or laminations of copper, and may be regarded as being of any convenient form or structure. The clamping-plates 22 are of brass, thin and flat. They are as wide as brush 28, and as long as is necessary to hold that brush with all necessary rigidity against commutator 1. Said plates, being inserted in clamp 23, are turned slightly away from each other at one end, to allow the convenient insertion of the brush between them, and are provided with suitable pins or other stops, 29, projecting from said plates in convenient positions to engage the body of clamp 23 and thus to prevent said plates from slipping from their proper positions during the-adjustment of the brush within said clamp. The latter consists of a single piece of brass, which is of general rectangular form, has a suitable slot for the introduction and retention of plates 22 and brush 2S, and is provided with a set-screw, 42, by means of which said plates and intermediate brush are held in position in said slot. The latter is further provided with two parallel rings or collars, 24, projecting from clamp 23 asintegral parts thereof, and separated from each other by a separate ring or collar, 25, which is connected with clamp 23 by a metallic spring, 26, and is held in position upon sleeve 10 by set-screw 27. Collars 24 have no motion lengthwise of sleeve 10, by reason of the fixed position of collar 25, but havea limited capacity of rotary mot-ion, dependent upon the elasticity of spring 26.

The device above described is presented in Fig. 6 in a modified form, in which head 8 of arm 9,bei n g made fast to rod 5 by set-screw 30, and provided with slots 17 for the reception of pin 18, takes the place of collar 6. In this case the

collars

6 and 12 of Fig. 5 are omitted and sleeve 10 is held between head 8 of arm 9 and a terminal nut, 31, on rod 5.

Figs. 7, 8, 9, and 10 present further-modifications and adaptations of the same invention. Yoke 32 is shown in Fig. 7. This yoke consists of a central ring, 33, which is fitted like a sleeve over yoke 3, and is adjustable thereon by a set-screw, and of two arms, 9, extending from that ring in opposite directions and sup porting two rods, 5, in parallel positions on opposite sides of shaft 2, in the manner above described. Two collars, 15, severally located upon said

rods

5 and 5, are fastened, respectively, to said rods by set-

screws

16 and 16, are joined together by means of two projecting arms, 31 and 31, and an intermediate insulated link, 35. One of said collars is provided with a handle projecting radially therefrom and consisting of two pivoted arms, 36 and 37. Arm 36 is immovable relatively to its collar 15, while arm 37, being pivoted to arm 36, is movable relatively thereto. These arms are normally held apart by a spring, 38. Arm 37 is provided with a short arm, 39, whose point in its normal position is held by the force of spring 38 in one or another of three several slots, etl, 41, and 4.1, in the contiguous edge of sleeve or collar 40, but is withdrawn from said slots whenever arms 36 and 37 are pressed together. Each sleeve 4.0 is provided with a binding-post, 44.

Figs. 7, 9, and 11 present the clamping-

plates

22 and 22 in a modified form, in which each plate, being made somewhat longer than in the previous figures, is bent over in such a manner that one end of the same, acting as a spring upon the outside of the clamp, holds that plate constantly in its position of pressing contact with the contiguous inner surf ace of said clamp. Each plate 22 is prevented from moving lengthwise in the clamp by suitable pins, 29, as before. The bent-over end of the upper clamping-plate,22,is provided with a slot, 43, dividing the end of said plate into two parallel strips of brass and admitting theset-screw 42 between them. The adaptation shown in Fig. 11 consists in placing two brush-holders and the brushes contained in the same upon one and 7 the same rod,-5, in positions of inversion relatively to each other.

The remaining features of construction involved in this invention will sufficiently appear from the drawings and from the mode of operation, which is now to be explained.

Such being the construction of this currentcollecting device, its operation requires but little description. Each brush-holder 21 isby set-screw 27 fixed in such a position relatively 8 to the commutator and to the rod or sleeve upon which such holder is immediately mounted that brush 28, which is held thereby, is in a position of contact or of no contact with said commutator, according as the point of the pin or short arm before mentioned is permitted to enter one or another of slots 17 and $1.

It is apparent fromthe described construction that any number of brushes 28, having been once adjusted to the desired degree of 9 pressure upon the commutator, may be thrown out of contact with the commutator and brought into contact with the same repeatedly, without any need of readjustment, by merely changing the position of pin'lS or arm 39 from I one' to another of said slots or sockets 17. In case of two opposite brush-holders mounted at one and the same side of the commutator,said holders are also in the same manner fixed in such a position relatively to each other that I the brushes 28, which are held thereby, cannot both be in contact with the commutator at one and the same time, and are both separated from the commutator whenever said pin or short arm is,permitted to enter the middle I slot or socket, as shown in Fig. 13. Each brush 28, being inserted between plates 22 in the manner described and shown, maybe conveniently moved forward between them, or withdrawn when worn out, by loosening I set-screw 42. The peculiar advantage of the curved clamping-plates 22 22, (shown in Figs.

7 10, and 13,) lies in the circumstance that,by reason of the clamping pressure of the same upon the upper and lower jaws, respectively, I of clamp 23, these plates are retained in position when the brushes are for any purpose loosened or withdrawn. At the same time these plates are easily removed by hand.

The construction described in connection I with Fig. 11 is specially adapted to be used in connection with electric motors in which either set of brushes is used alone, according as the motor turns in one direction or in the other. I I claim as my invention and desire to secure by Letters Patent- 1. A brush-holder having a slot, a removable clamping-plate which is provided with pins or other stops projecting from said plate in positions to engage the edge of said slot, and is held in a position of actual or approximate contact with the inner surface of said slotby an extension of said plate bent over as a spring to a position of engagement with the outer surface of said brush -holder, substantially as and for the purpose specified.

2. A rod,a sleeve upon said r0d,and aspringstop whereby said rod and sleeve can be firmly set at will in any one of several predetermined positions relatively to each other, in combination with an insulated arm, an adjustable brush-holder,and a set-screw which is adapted to fix said brush-holder in desired positions upon said rod or sleeve, substantially as and for the purpose specified.

3. A rod, a sleeve upon said rod, and astop whereby said rod and sleeve can be firmly set at will in any one of several predetermined positions relatively'to each other, in combination with a brush-holder which is mounted ,upon said rod or sleeve and a set-screw which is adapted to fasten said holder in desired positions about said rod or sleeve, substantially as and for the purpose specified.

4. A cylindrical rod of brass or other conductive material, a sleeve of like material surrounding said rod, and a spring-stop whereby said sleeve can be firmly set in any desired predetermined position upon said rod, in combination with a brush-hold er which is mounted adj ustably in any desired position upon said rod or sleeve, substantially as and for the purpose specified.

5. A cylindrical rod, a rotatable sleeve surrounding the same, and an adjustable stop whereby said rod or sleeve may be firmly set in predetermined relative positions, in combination with a spring-seated brush-holder, substantially as and for the purpose specified.

6. Two cylindrical sleeved rods, which are supported in parallel positions by an insulated yoke and are provided with two insulated arms joined by a link, in combination with an adjustable spring-stop between one of said rods and the sleeve which is thereon, substantially as and for the purpose specified.

7. A cylindrical rod of brass or other electrically-conductive material, a sleeve surrounding said rod abrush-holder which is mounted in an adjustable manner upon said rod or sleeve, and an insulated arm projecting therefrom, all duplicated, supported by an insulated yoke and linked together, in combination with an adj ustable spring-stop whereby said rod can be firmly set in any one of two or more predetermined positions relatively to said sleeve, substantially as and for the purpose specified.

8. A cylindrical rod, a sleeve upon said rod, a brush-holder mounted adj ustably upon said rod or sleeve, a brush in said holder, an arm projecting from said arm or sleeve, all duplicated, supported by an insulated yoke about the 'armatureshaft of a dynamo-electric ma chine or motor, and provided with a link by which said arm and'the duplicate thereof are joined together, and with an adjustable springstop between said rod and sleeve, substantially as and for the purpose specified.

In testimony whereof I have herento set my name in the presence of two witnesses.

I DAVID wILLiAMsoN. \Vitnesses:

RICHARD H. BIA'lI-I'ER,

Anson O. Housn.