US890949A - Speed-recorder. - Google Patents

Description

'PATENTED JUNE 16, 1908;

E, WALDER.

SPEED RECORDER.

APPLIOATION FILED JUNE 22,1906.

UNITED STATES PATENT OFFIGE.

HAN-i WALDER, OF MEILEN, SWITZERLAND.

SPEED-RECORDER.

Application filed June 22, 1906.

To all whom it may concern:

Be it known that I, HANS WALDER, residing at Meilen, Switzerland, have invented certain new and useful Im rovements in Speeddtecorders; and I do iereby declare the following to bea full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to a speedrccorder or speed-gage which is based on the well known principle that moved permanent magnets influence good conductors in conscq uence of the Foucault currents generated in them if the latter are brought into the magnetic field, and this invention has for its ob ject a special device in which several 1nagnets are jointed to a wheel, said wheel. being rotated by the shaft the speed of which is to be measured, while the conductor to be in financed by the magnets consists of a fiat plate which is movable tangentially to the circ u inference of said wheel.

The speed-recorder is illustrated in the accompanying drawin in which:

Figure 1 is a vertical section through the axis; Fi 2 is a plan with the cover partly remove Fig. 3 is an end elevation, the end of the case having been removed, and Fig. 4 shows another way oi making the magnet- Wheel.

The axle 3 is mounted in a case 2 closed on all sides, said case bein provided with an inspectionopening only on the top, which og'iening is closed by a g ass plate. A wheellnre body tis carried on the end oi said axle 3 projecting inside the case, which body 4 consists of a nu inbcr of magnets 5, with their poles turned towards the periphery. A flat plate 6 consisting of good conducting material is mounted close to the cylindrical outer circumference of those magnets, said plate being thereby under the influence of the magnets, and is moved in the direction of the arrow II by the rotation of the magnetwheel 4 in the direction of the arrow 1. For the purpose oi" guiding the some the plate 6 is provided with two arms 7, 7 ointing downwards and formed fork-like which ongage wheels 8 running on a rail 9. At its upper edge the guiding is effected by a roller 10 connected with the plate and a rod 11 fixed to the frame of the speed-recorder, so that the late can move easily but with certainty rectilineally, e. in the direction of the tan- Specification of Letters Patent.

site the place at which the Patented June is, 1908.

Serial No. 322,842..

gent to the direction of rotation of wheel 4, between the rod 11 and the rail 9.

The displacement occasioned by the action of tne magnets 5 is opposed by a s ring. Said spring may either consist in an or inary s iral spring 23 which engages any part 0 the carriage on the one hand and the case on the other hand, or the spring may be formed in any other approved manner.

A piece of lI'OIl 12 can be arranged oppolate 6 nearly touches the circumference o the magnet wheel for increasing the effect. Further an arm 13 is joined to the plate 6 which arm runs out into a pointer which moves over a plate 14 provided with a scale under the in s ection opening 1 and thereby makes known tlie displacement of the plate or carriage.

Now in order to give a permanent record of the velocit measured by the device or an in dication o the velocity of rotation which a shaft he's in the course of a iven. period, a rccording-device is arranged consisting of a roller 15 covered with paper, the axle oi which lies parallel to the direction or motion of the carriage or late 6, and a style 17 joined with the carriage by a sprin 16, said style contacting the surface of the rdllcr when the carriage moves. The roller 15 is rotated at a uniformly slow speed by clockwork G of any ap roved construction arranged between the' mine-plates 18.

For continuous recording, i, e. for record-- iug during long periods for which the periphery of the roller 15 would not suliice, a longer strip of paper is continuously led over the roller, said strip being wound on a roller 19 at the commencement of the recording, and then led over the recording roller 15 and wound up on the roller '20 resting in vertically guir ed bearings 21, said bearings being carried by springs 22 and pressed upwards, so that the periphery of t re roller 20 con:

tinually contacts with the peri )hery of the recording roller 15 and can yiel or give way with the increase of its diameter on account of its winding upthe strip of paper. This or ran ement renders it possible to drive the recor ing roller only, whereby the driving mechanism is simplified exceedingly. Therefore when at work the ap aratus effects a permanent record of the ve ocities by drawmg a curve, besides he visible indication through the glass of I speed attained, the abscissee being the tin 1101 the ordinates the velocity, which make possible to know exactly the durationand the point of t me of the diflerent velocities. v

Instead ofthe arrangement of the magnets and the form of the movable conductor as shown in Fig. 1, such an arrangement as.

. either beside one another nor one over the other. Then the conductor has a longitudinal rib which enters between the poles, said poles being arranged so that an annular groove is left free between the same. With this arrangement it is possible to form the magnets as horseshoe-magnets. By this arrang'ement a stronger action of themagnets on the conductor is made possible.

l/Vhat I claim is: I

1-. In a'speed lneasurer, the combination,

with a revoluble wheel having ma nets at its periphery, of two stationary gui e rails arranged one above the other, a metallic late arran ed at a tan ent to the said whee and provi ed with r01 ers which run on the said guides, a spring for movin the said plate in one direction, and means i 01 measuring the displacement of the said plate when the said wheel is revolved.

2. In a s eed measurer, the combination, with a revo uble wheel having magnets at its periphery, of a slidable metallic plate arranged at a tangent to the said wheel, guides for the said plate, a record roller rovided with means for-revolving it, a supp y roller, a receiving roller, aspring for pressing the said receiving roller against the said record roller, a record strip wound onthe said su 4 ply and receiving rollers and passing over t e said record roller, and a marker carried by the said plate and bearing on the said strip.

In testimony whereofl afiix my signature,

in-presence of two witnesses.

HANS WALDER.

l/Vitnesses:

A. LIEBERKNECHT, Enw. KLEINER.

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