US1065015A

US1065015A - Resistance.

Info

Publication number: US1065015A
Application number: US52389509A
Authority: US
Inventors: William R Youmans
Original assignee: Jeffrey Manufacturing Co
Current assignee: Jeffrey Manufacturing Co
Priority date: 1909-10-21
Filing date: 1909-10-21
Publication date: 1913-06-17
Anticipated expiration: 1930-06-17

Description

W. R. YOUMANS.

RESISTANCE.

APPLICATION FILED 00121, 1909. 1,065,015, Patented June 17,1913.

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WILLIAM R. YOUMANS, OF COLUMBUS, OHIO, ASSIGNOR 1'0 THE JEFFREY IIANUFAC- TUBING COMPANY, A CORPORATION OF OHIO.

RESISTANCE.

Specification of Letters Patent.

Patented June 1 7, 1913.

1 b all whom it may concern Be it known that I, WILLIAM R. YonMANs,

a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Resistances, of which the following is a specification, reference being had therein to the accompanying drawing.

resistances. One of its objects is to provide a light and compact construction which shall have a high resistance and large heat radiating capacity.

A further object is to rovide improved means for tensioning the e einents of the resistance.

In the accompanying drawings I have shown one embodiment of my invention, but it will be understood that various structural changes may be made within the scope of my invention.

In the drawings Figure 1 is a side elevation, Fig. 2 is a vertical cross section taken along the line 2-2 of Fig. 1, and Fig. 3 is a plan View. i

Referring to the drawings, 1 represents the main frame. This comprises the two

side rods

2, 2 and the end angle irons 33.

4 are spacer blocks through which the side rods 2, 2 pass and to which theyare secured by means of the nuts. The angle irons are riveted to the spacer blocks 4, and in this way the spacer blocks unite the angle irons and the side rods into a rigid rectangular frame. 5, 5 are angle irons similar to 33.

These are secured together and to the

side rods

2, 2 bymeans of spacer blocks similar to the

blocks

4, 4. The springs 6, 6 engage the angle irons 5, 5 and tend to force them outward. The pressure of the springs may be adjusted by turning the

nuts

7, 7.

Between the upper pair of

angle irons

3, 3, and between the angle irons 5, 5, I mount a series of rollers 88. These are supported by the bolts 99 which extend between the angle irons. The rollers 88 are constructed of wood or other suitable insulating material. Over these rollersis laced the ribbon 10 which extends alternately from a roller on one end to a roller on the other. The rollers 8 are provided with side flanges .which prevent contact between the ribbon and the frame.

The ribbon 10 is composed of any suitable alloy which has a high specific resistance and is capable of withstandin a high temperature. The ends of the rib on are secured to the terminal blocks 11 which are mounted between the angle irons 3. 3. To these terminal blocks are connected the

lead wires

12, 12.

The elastic mounting of the frame section I comprising the angle irons 5, 5, permits ex-- Ilns invention relates to improvements in pansion and contraction of the ribbon 10, and at the same time maintains it in proper tension. With this construction it is 1mposslble for two parts of the ribbon to expand and become short circuited by engaging one another. The use of the rollers distributes the tension uniformly throughout the various, parts of the ribbon, and also gives a direct and positive connection between all parts, Which would not be the case were the resistance to be composed of a number of separate strips connected together.

While I have described the resistance element 10 as a ribbon, I do not desire to limit myself to this exact construction. In some cases it may be preferable to use a circular wire, or even a number of parallel circular wires.

WVhat I claim is 1. In a resistance device, the combination of two parallel frame parts, resilient means tending to hold the-said parts in substantial.

parallelism and to force one of said parts away from the other, two parallel series of rotatable rollers, one on each of the said frame parts, the axis of each roller being perpendicular to the corresponding frame part and a continuous flexible resistance ele ment extending over the said rollers and back and forth between the said two frame parts, substantially as set forth.

2. In a resistance device, the combination of two frame parts, each part consisting of two parallel connected bars, resilient means tending to force the two parts away from one another, a series of insulated flanged rollers rotatably mounted between the bars comprising one frame part, a second series of insulated flanged rollers rotatably mounted between the bars comprising the second frame part, and a continuous flexible resistance element extending over said rollers and in a zigzag manner between the two frame parts, substantially as set forth.

3. In a resistance'device, the combination of three parallel frame-parts lying in the same plane, rigid connecting membirs between the outer two of the said frame parts, the middle of the said frame parts being slidable on the connecting members, resist-- ance element-s between the middle frame part and one of the end frame parts, and means for moving the tension the resistance elements, substantially as set forth.

4. In a resistance device, the combination of three frame elements each comprising two parallel connected bars, connecting rods between the outer two of the said frame elements, the middle of the said elements being slidable on the bars, a series of insulated flanged rollers between the bars comprising one of the outer frame elements, a second series of insulated flanged rollers between the bars comprising the middle frame element, a continuous flexible resistance element extending over said rollers and back and forth between the two series, and resilient means for forcing the middle frame element in one direction to tension the resistance element, substantially as set forth.

middle frame part to' of two stationary frame parts, two tie-bolts rigidly connecting the said stationary frame parts, a movable frame part between the tw0 stationary frame parts and slidably en- ,gagmg the said tie-bolts, a series of insulating rollers rotatably mounted upon one of the stationary frame parts, a similar series of insulating rollers rotatably mounted upon the movable frame part, a continuous fiexible resistance element extending over said rollers in a zigzag manner between the two frame parts, nuts in adjustable threaded engagement with the tie-bolts, and coil springs on the tie-bolts between the said. nuts and the said movable frame parts, the said springs tending to move the movable frame part to tension the said resistance element, substantially as set forth.

In testimony whereof I afiix my signature, in presence of two witnesses.

' WM. R. YOUMANS.

Witnesses:

ARTHUR G. SKEELs, R. R. DUNLor.