US1058687A

US1058687A - Electrical resistance device.

Info

Publication number: US1058687A
Application number: US53364409A
Authority: US
Inventors: Gustave C Marx
Original assignee: Diehl Manufacturing Co
Current assignee: Diehl Manufacturing Co
Priority date: 1909-12-17
Filing date: 1909-12-17
Publication date: 1913-04-08
Anticipated expiration: 1930-04-08

Description

0; MARX. ELECTRICAL RESISTANCE DEVICE. APPLICATION FILED DEC. 17, 1909 1,058,687. Patented Apr. 8, 1913.

UNITED STATES PATENT OFFICE. GUSTAVE C. CFIELIZABETH, NEW JERSEY, ASSIGNOB. TO DIEI-IL MANUFAC- TURING COMPANY, A CORPORATION OF NEW J ERSEY.

ELECTRICAL RESISTANCE DEVICE.

To all whom may concern Be it known that I, GUSTAVE C. MARX, a

' citizen 'of' the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Electrical Resistance Devices, of which the following is a specification, reference being had therein to the accompanying drawings.

In connection with the employment 'of electric propeller fans for ventilating purposes requiring interchangeability at certain times, and particularly in connection workmen in charge of the cars.

The present invention consists in the devices herein shown and described and recited-in the appended claims for accomplishing these objects.

In the accompanying drawings, Figure 1 is a side elevation of an electric fan provided with the present improvements, and

Fig.2 a sectional side elevation of a resistance coil and its means of connection to the fan motor; F1g. 3 1s a sectional view of the cylindrical housing of the resistance coil, representing the inner end of the same; and Fig. 4 is a transverse sectional view of the cylinder showing the guard-plate at the outer end of the'resistance coil.

The fan is constructed as usual with a motor-frame 1 in which is journaled the armature-shaft 2 carrying .the fan-blades 3, and ispivotally mounted by means of screws 4 in the yoke 6, which has a depending stud having the nut 8 by means of which it is adjustably secured within a suit ably socketed lug 10 extending from the bracket 11, which latter isprovided with means for securing it to a suitable support.

Attached to the back of the motor-frame by means of screws 32 a bracket-piece to which is secured by means of rivets 34' or V Specification of Letters Patent.

mated A r. 8,1913.

Application filed December 17, 1909. Serial No. 533,644.

otherwise the metallic housing cylinder 35 for the resistance coil. This cylinder is shown open at one end and closed at the other end by means of a disk 36 having a central 'boss 37 through which passes the threaded end portion of the resistance coil supporting stud or spindle 38 arranged in axial relation with the cylinder The disk 36 may be secured in the end of the cylinder 35 by means of screws'39 or by any other suitable means, and it is shown formed in its inner face with an annular channel 40 in which are secured the spring contactplates 41, by means of conducting screwbolts 42 passing through the disk 36 and having upon their outer threaded ends the clamp-nuts 43 between which are secured the bared ends of the insulating conducting wires forming a part of the system of wiring. The disk 36 carrying the relatively insulated contact points or members 42 thus constitutes an insulated support for the resistance coil sustained by the stud. or spindle 38.

The resistance coils herein shown are in the form of insulated spools of the class well known commercially in the art and each comprising a coil of wire of low conductivity wound upon a tubular insulating arbor and having leading therefrom at in tervals, as represented in Fig. 2, connecting wires 44 leading to suitable contact studs; the sectional resistance coil thus formed having molded thereon a covering 45 of porcelain.

As shown in Fig. 2, the cover 45 has at its inner end a central perforated disk 46 of insulating material, preferably formed separately from the covering 45 and of less brittle material, such asfiber, through which pass a series of preferably soft copper contact studs 47 corresponding in number and arrangement with the contact plates 41 of the disk 36, and having apertures entered by the ends of the connecting wires 44 mechanically secured in position therein by pinching the ends of the studs 47 ,thereon.'

, The heads 48 of the studs 47 normally rest in contact with the flat outer ends of the contact plates 41.

The resistance coil has at its opposite end a central perforated steadying guide-plate 49 of insulating material, the

plates

46 and 49 being firmly secured upon the ends of the resistance coil between the head 38 of the .the stud 38 is removably securedavithin its aperture in the disk by means of the nut 51 whose position determines the degree of pressure between the contact-plates 40 and the heads 48 of the conducting studs 47. The guide-plate 49 is made comparatively narrow, as represented in Fig. 4 to afford apertures on opposite sides to permit the free circulation of air through the housing 85 to insure against overheating of the resistance coil. The cylinder is provided upon its inner wall with a longitudinal rib 35* formed by indenting the side of the cylinder, and to this rib are fitted correspondingly shaped notches 52 and in the

insulating disks

46 and 49, whereby the contact studs 47 are guided and maintained in proper relation with the spring contact plates 41.

The motor bracket 11 is shown provided with aconnection box 54 which is in practice connected with conductor wires from the source of supply and from which are led the wire 55 directly to one of the motor terminals and a series of wires 56 each leading to one of the terminal screw-bolts 42 of the resistancecoil housing.

Vhile it is preferable to form the disk 36 constituting the end of the resistance coil housing cylinder, and the

plates

46 and 49, all of porcelain, especially when the

mem bers

46 and 49 are made integral with the insulating covering of the resistance coils, it will be understood that these several insulating parts may be made of any suitable materials, so long as the live members for v conducting current carried thereby are suitably insulated.

The resistance coils are supplied for application to the fan-motor with the stud or spindle 38 between the head 3S and nut 50 of which are clamped the coil 45 with its

end plates

46 and 49, the former carrying the contact-studs 4'7 permanently connected with the ends of the conductor wires 44. In

renewing the coil, therefore, it is merely nec essary for the attendant to remove the nut 51 from the stud 38 of the previously used resistance coil, Withdraw the latter from the open end of the housing cylinder or casing 35 and introduce a new coil to be secured in position by application of the nut 51.

As represented in Fig.2, the housing cylinder 35 is provided in the side walls with perforations Z35 to facilitate the circulation of air around the resistance coil.

It is evident that, while the embodiment herein shown and described is preferable, the present improvement is susceptible of considerable modification in the specific construction and arrangement of its componentparts without departure from the presentinvention.

Having thus set forth the nature of the invention, what I claim herein is:

1. The combination. with a support provided with a plurality of relatively insulated contact-points having means of attachment to electric-current conductor-wires, of a sectional resistance coil having a member carrying a plurality of relatively insulated contact-points to which its sections are respectively connected, and means for removably securing said resistance coil to said support with its contact-points each in electrical connection with one of those of the support.

2. The combination with a support pro vided with a plurality' of relatively insulated contact-points having means of attachment to electric-current conductor-wires, of a sec tional resistance coil having a member carrying a plurality of relatively insulated contact-points to which its sections are rcspectively connected, means for rcmovably securing said resistance coil to said support, and an interposed yielding connection between each of the contact-points of said resistance coil and a corresponding contact point of the support.

3. The combination with a support provided with a plurality of relatively insulated contact-points having means of attachment to electric-current conductor-wires, ofa sectional resistance coil in the form of a spool with an insulating covering of heat-resisting material and a disk at one end composed of non-fusible insulating material carrying a plurality of contact-points connected respectively with the several sections of the resistance coil, and means for rcmovably securing said resistance coil to said support withits contactpoints in electrical connection with those of the support.

4. The combination with a housing having side-walls and a centrally apertured end provided with a plurality of contactpoints having means of attachment to electric-current conductor-wires, of a sectional resistance coil in the form of a spool having end flanges loosely fitted to the side walls of said housing, contact-studs carried by one of said flanges in substantially the. arrangement of and adapted for electrical connection with the contact-points of the housing and connected respectively with the sections of said coil, and a longitudinally disposed supporting stud for said resistance coil entering the aperture in the end of the housing and detachably secured therein.

5. The combination with a cylindrical housing having a longitudinal guide-rib upon its inner wall and a centrally apertured end provided with a plurality of contact-points having means of attachment to electric-current conductor-wires, of a sectional resistance coil'in the form of a spool having end flanges loosely fitted to the walls of said housing and peripherally notched to embrace said guide-rib, contact-studs carried by one of said flanges and adapted for electrical connection with the contact-points of the cylinder-end and connected respectively with the sections of said coil, and a central supporting stud for said resistance coil entering and detachably secured within the aperture in the end. of the housing.

6. The combination with a cylindrical housing having a longitudinal guide-rib upon its inner wall and a centrally apertured end provided with a plurality of contactpoints having means of attachment to electric-current conductor-wires, of a sectional resistance coil in the form of a spool having end flanges loosely fitted to the walls of said housing and peripherally notched to embrace said guide-rib, one of said flanges being narrower thanthe housing to afford ventilating apertures for the latter, contactstuds carried by the other of said flanges and adapted for electrical connection with the contact-points of the cylinder-end and connected respectively with the sections of said 0011, and a central supporting stud for said resistance coil entering and detachably secured within the aperture in the end of the housing.

7 The combination with a housing having side-walls and an end provided with a central aperture and carrying a plurality of contact-studs having means of attachment to electric-current conductor-wires, and spring contact-plates secured by means of said studs to the inner face of the end of the housing, of a sectional resistance coil in the form of a spool having end flanges loosely fitted to the side-walls of said housing, contact-studs carried by one of said flanges in substantially the arrangement of said spring contactplates with which they are normally in contact and connected respectively with the sections of said coil', a central supporting stud for said resistance coil entering the aperture in the end of said housing, and means for detachably securing the same to the end of the housing.

8. The combination with a housing proadded with a plurality of contact-points, a

sectional resistance coil-having a plurality of contact-points to which its sections are respectively connected, means whereby said resistance coil is removably secured within said housing, interposed yielding connections between the contact-points of said coilhousing open at one end and having the other end closed by a disk of insulating material, a plurality of contact-bolts passing through said insulating disk and provided upon the outer face ofthe same with means for securing conductors thereto, a spring contact member attached to theinnerend of each'of said contact-bolts, a sectional resistance coil in the form of a spool having end flanges, contact-studs carried by one of said flanges in substantially the arrangement of the spring contact members of the cylinderend and connected respectively with the sec-i tions of said coil, and means for detachably securing said resistancecoil within the housing with said contact studs inengagement with the respective springcontact members of thecylinder-end.

10. The combination with a housing perinanently openfor the free circulation of air,-

and provided with a plurality of contactpoints, of a sectional resistance coil having a plurality of contact points to which its sections are respectively connected, means whereby said resistance coil is removably secured within said housing with its contact- -points in electrical connection with those of said housing, and means whereby the contact-points of the housing may be connected two subscribing witnesses;

GUSTAVE O. MARX.

Witnesses:

HENRY A. KORNEMANN, HENRYJ. MILLER.

'90 with a source of current supply and a cur-