US20908A - Automatic mechanism - Google Patents

Description

J. M. WAMPLER. AUTOMATIC MEOEANISM FOR OPERATING THE SURVEYORS GRAPHODOMETER.

No. 20,908. Patented July 13, 1858.

p now-J @ir Aretha) J. M. YVAMPLER, OF BALTIMORE, MARYLAYD.

AUTOMATIC MECHANISM. FOR OPERATING SURVEYORS GRAPEODOMETEE.

To all (C/1022b it nut/y concern:

Be it known that l, J. lvlonrns of the city of Baltimore. in the titate o lilaryland, have invented a new and useful Machine or Instrument, which E denominate a Graphodometer, for Taking and Record ing Automatically Courses, Distances, and Levels: and i do hereby declare the following to be a correct description of the same, reference being had to the accompanying sheet of drawings, in which- Figure l, is a longitudinal, vertical, central section of the machine; Fig. 2, is a top view of the same; Fig. 3, is an elevation of the rear end of the machine; and Fig. i, a similar elevation of the front end of the machine.

The nature of my invention consists in the combination, in a suitable vehicle, of antomatic mechanism for recording courses, distances, and levels, as hereinafter more particularly set forth.

In the drawings, the same part is indi cated by the same letter of reference in all the figures.

A marks the frame of the machine; B, roll of paper on which the results are recorded; C, axle of last retarding wheel; D, box having two compartments; E, E, rollers over which the record paper passes; F, F. rollers to keep the paper in place by pressure; G. guides for pencil bars; H, bar to which weight, TV, is swung; 1, connecting joint between H and t," K bent lever, con necting weight, W, with pencil bar Y; L, lever connecting rack bar, S, with pencil bar Z; M, cog wheel on inner end of left hind axle; N, N. spring friction rubbers: O, O, cogged retarding wheels, connecting the distance wheel, P, with the paper-feeding apparatus; P, the right hind wheel: P, the left hind wheel, or distance wheel; 0,.king bolt of fore axle; R. cogged segment attached to top of bolt Q; S, rack bar, worked by segment R; T, braces supporting frame A; U, U, front frame work: V, front axle; lV, hanging weight or plumb; X, pencil for marking levels; X, pencil for marking courses; Y, pencilbar for levels; Z,pencilbar for courses; a, bar over which the paper strip passes while the record is marked upon it; 7), slit through which the paper strip passes out of box D: c, 0, doors of box D; (Z, opening or slit into which the strip passes after the record is marked upon it: c, c, journals of paper rollers E, E; f, the paper strip as it leaves the roll 13; 5/, the paper strip as it falls into box l after being marked: 1i.

central line of paper strip: Z brace to which lever la is pivoted: Z, brace to which lever,

' pivoted; m, m, axles of rear wheels;

i1, 11% a, a, are described by plumb il q, bolts to keep king bolt from turning in axle V; 2: rod of plumb il To enable others to make and use my invention, i. will proceed to describe more pa r ticularly its construction and operation. 1 construct a light vehicle, with four wheels, and ha ing a strong but light frame A, as shown. The fore wheels are of any ordinary construction, and are less in diameter than the hind wheels, for convenience in turning. The top of the frame, A, is horizontal, when the vehicle is on a level. the difference in height between the fore and hind axles being made up by the front framing U, U", T, T. as seen in Figs. 1, and l. Through the fore axle, V, passes a large king bolt, Q, which is prevented from turning in the axle by the. small transverse bolts 9', f], (l -:l-). lit-- tached rigidly to the top of bolt, is the cogged segment R, meshing into the teeth of rack ba S, which works transverselv across the frame, Jr. as seen in Fig. 2. To this bar. S, is pivoted lever, L. the other end of said lever being pivoted to pencil bar, Z, which traverses the frame Jr. in guides G, and carries. at its inner end, pencil X, for recording courses.

The hind wheels P, P, work in double bearings. as shown. and are fast to their axles. Their circumference is the measuring unit of the distances traversed by the machine. The left wheel. I is the distance, or measuring wheel. On the inner end of its axle, is a cog wheel 3. working train of retarding wheels, O. O, O, O,

1. and 2.), which drive the paper rollers E, E, and give them a speed having a definite relation to that of the distance wheel P. Supposing, for example, the paper rollers to have a circumference of one foot, and that it was desired to make the suiwev on the scale of 5 feet to a mile. the train of wheels 0, O, &c.. should be so arranged as that the distance wheel l7 should revolve 1056 times, in order to effect one revolution of the paper roller. The train would require to be altered according to the scale on which it is desired to make the field notes. The paper rollers. E E, have pins or teeth projecting from their edges and center line for .cators of the distances passed over.

the purpose of catching the edges and center of the strip of paper, f, g, and carrying it forward as they revolve. The holes thus pricked may also be made to serve as indi- The paper on which the facts are recorded is made into a large roll, B, and placed in box D, between a number of small rollers, seen in Fig. l. Thence it passes out, through aperture or slit Z), and is drawn between paper roller, E, and pressure roller, F, the latter pressing it closely into contact with E. It then passes over bar (a, a, and on to roller E; then, between E and F, and down through slit, (Z, into the large front compartment of box D. hen it is exhausted, a fresh roll is supplied; and, to give notice of the failure of the paper, I propose to arrange a signal bell in any convenient mode. As the paper strip passes over bar, a, at the definite and predetermined rate, it is impressed by pencils, X, and X, with marks which indicate the courses of the line traversed, and its differences of level.

The course on which the instrument starts must be determined by a compass observation. That being done, the deflections, either to right or left, from that course, are marked by pencil X, at end of pencil bar Z, which is controlled by lever L, attached to rack bar S. If the deflection is to the right, rack bar S, will be moved to the left by cogged segment R; the forward end of L, will also be moved to the left, and its after end to the right, carrying with it bar Z, and its pencil X. The converse result will be attained by the movement of the vehicle to the left. The line described by the pencil X, when the vehicle is going straight forward, is the zero line of courses. The marks made by pencil X, thus give data for an accurate plat of a horizontal projection of the road or line traversed by the machine, recording with accuracy the various angles in such road or line. The record made by pencil X gives data for an accurate profile, or vert1cal pro ect1on of the line or road. This is effected by means of the weight W, and its connections. When the vehicle is on a level surface, the weight W hangs at right angles to the horizontal frame A, and the pencil X, is on the zero line of levels. lVhen the vehicle comes on a rise, the weight, XV, assumes to the frame A the same relative angle, that the slope of the rise does to a vertical line; and the change of position in the weight imparts motion to level K, pencil-bar Y, and pencil X, which last is drawn to the left of the Zero line, and continues in one position until there is a change in the angle of the rise. hen the vehicle is descending, the pencil X, will be moved to the right of the zero line. It thus keeps an accurate record of the changes of level in the line, their angles and the duration of such changes, giving the materials for a perfect profile. Undue vibration in the weight W is prevented by the spring friction-rubbers N, pressing slightly against the sides of the guide plates between which the weight vibrates.

The mode of recording herein described may be applied to an instrument for taking levels alone or courses alone, and I have so contemplated its application.

It is obvious also that an instrument with three wheels would, in many cases, answer the purpose as well as one with four.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

The combination with a moving strip of paper, or other proper material, arranged on any suitable vehicle, of automatic mechanism for taking and recording distances and courses, or distances and levels, or distances, courses and levels, substantially as hereinbefore described and shown.

The above specification signed and witnessed this 26th day of March 1858.

J. M. VAMPLER.

Witnesses GEO. E. CHENowE'rH, lVM. MARTENET.

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