DE16065C - Profile draftsman for rails - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The apparatus is constructed in such a way that it can

1. subjects the profile to be examined to the measurement at all its points and directs it in records to an enlarged scale,

2. Allowed for later measurements to keep the rail head exactly on the same To investigate

3. For the purpose of comparison, each measurement is based on two determined and fixed once for all Axen refers

4. Can be used for both transverse and long sleeper superstructures.

The same consists of:

a) the circle management,

b) the slide,

c) the writing board and

d) the frame.

The circular guide α holds the slide and forces it to follow the circular path with every movement. The slide b is connected to a stylus e and a pen with a sleeve /. The former, which can move up and down in a vertical guide, bypasses the profile to be measured while the slide is moved through the circular guide. The pen is designed and connected to the stylus in such a way that it Time the distance of the tip of the stylus from the horizontal axis laid through the center of the circular guide is noted in a certain enlarged measure on the writing board. When the slide is moved, it therefore records all points that the stylus touches at an enlarged distance from the horizontal axis on the writing board, determined by the lever ratio, and provides the complete enlarged image of the profile traversed with the stylus.

The writing board c is used to attach the paper on which the image of the profile is to be recorded. The individual sheets of paper are held on the board by hoop nails and their position is determined by a raised edge η, which surrounds the board from all sides.

The frame d conceives Sämmtliche parts together, and determines the position of the axes on which the drawing is to be referred. These are two right-angled axes, which are perpendicular to the horizontal through the center of the circular line and have their point of intersection in this horizontal.

Marks on the writing board make the Transfer axes to the drawing.

The frame has three Fufsspitzen / j f ^ _p%, two / _2/3 on the right, a J) ₁ on the left side.

With the same becomes the. Apparatus placed on the rail feet, in points, which are determined once and for all by pre-graining. It thereby becomes the apparatus in all measurements exactly the same set-up is secured and achieved that the rail can always be examined at the same point.

The stylus e is pressed by a spring g pressing on the sleeve of the pen f against the horizontal axis passing through the center of the circular guide. The movement of the stylus is · bounded by Abschlufs the vertical guide s.

If the stylus is in the lowest permissible position, the pen lies on the horizontal axis

parallel (see attached drawing, Fig. A), then the distance of the tip of the latter is Ty

R =. —R (where r is the distance of the former

from the horizontal axis and A and B denote the lever lengths). If the stylus e. lifted in the vertical guide s , z. B. at C, the tip of the pen / around the

—Fold, here D ₁ because it rotates around point P. Hence denoted in all

Ty

If the tip of the pen lay the -fold

Distance of the tip of the stylus from the horizontal axis.

The pen is controlled by a lying in the same spring ο pressed against the writing board. This spring also causes the extension of the pen, which is necessary when the pen is lifted. The tip of the pen is adjustable and is regulated by screws t in the horizontal and vertical direction according to a mark made on the writing board.

The tips of the feet are movable and have a precise division. This makes it possible to use the apparatus for rails of different heights and for later measurements to always bring the axes of the apparatus into the same position as in the first examination. The hole k is used to fix the entire slide by means of a resilient pin to be attached in the same. To exchange resp. With the tip of the pencil, the approach Z of the innermost sleeve of the pen is lifted into the notch in the slot m. The regulation and adjustment of the writing pencil point is done by the screws tt _x (see details in Figs. 6 and 7). The other details can be clearly seen from the drawing.

After the paper has been attached to the writing board c , the device is placed in the points pre-grained on the rail foot and held by a worker who lightly presses _{the two handles on the writing board ^ 1} ^ _2. Then the locking of the pen and the slide is released and the latter is slowly moved in the circular guide around the profile to be measured, completing the recording and closing the profile. is drawn. The later measurements can also be recorded directly on the same sheet on which the first measurement was applied. The wear or deformation is thereby easily found with full accuracy and in a clear, descriptive manner. The pre-punching of the rails for the first measurement has to be done by means of special templates, and it is advisable to also punch points χ and y on the rail head, the starting and end points of the measurement, so that if the rail is bent, there are two more besides the axes to have further points for an exact comparison of the measured profiles.

Claims (1)

Patent claim: A profile draftsman, consisting of the combination of the circular slide, Fig. 3, 4 and 5, in the circular guide a, which is connected by the intermediate piece d to the drawing table of the apparatus, which is arranged centrally to the rail head means, with the carriage ^ ₁ , Figs. 8 and 9 , which carries the thread for the nut-threaded sleeve of the stylus c , and the peculiar drawing pen /, Fig. 3, 6 and 10, which slides in the tubular guide located on the carriage S ₁ and is guided by a spiral spring 0, corresponding to his Angle of inclination, always dragging on the drawing or extended. shortened and at its end carries the pen tip adjustable by the adjusting screws tt. For this purpose I sheet drawings.