DE1979356U - SPEED ANALYSIS SCALE. - Google Patents

Description

P.A. 685 5V2 * -2.12.B /

Patent attorney Dipl.-Ing. Rudolf Möbus

REUTLINGEN HINDENBURGSTRASSE65 TELEPHONE (O7121) 34718

G 652

G-ebrüder Bosch company

Jungingen / Hohenz ollern

Rapid analysis scales

The invention relates to a high-speed analysis scale with Shift weights and a pre-weigher for rough determination of the weight value of a load to be weighed.

Ss are already scales with a device for goal weighing become known of a load to be determined. However, these scales have the disadvantage that all S tain weights of the "scales must be lifted off. Apart from the additional work involved in taking off the shift weights already in the rough determination

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of the weight with the help of the pre-weigher, These scales have the disadvantage that shocks occur when the weight is weighed again after it has been weighed that are detrimental to the delicate mechanism of the balance. · Since all the weights have been lifted are, the adjusting levers are heavily loaded when resetting by the lifted weights, so that they are easy Can jump out of the hand of the operator, causing the weight to fall on their bearings and a shock load of the balance beam and its precision bearing point cause.

The invention was based on the object of avoiding the disadvantages mentioned above. This object is achieved according to the invention solved in that the Yorwaage is formed by a spring balance, which is when the shift weights are placed The balance arm of the balance beam can be placed from above against the load pan. The Yorwaage points a support part around a pivot point on the weighing frame is pivotably mounted and can be pivoted by means of a switching rod from an upper rest position into an operating position or vice versa. Xn the In the operating position, the balance arm acts on the spring of the Yorwaage via a point bearing. Need to weigh up so the weights didn't lift off too. but the Yorwaage is simply swiveled around your Support part from above against the rear part of the balance

- 3

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bar attached. According to the invention, the spring is dimensioned so that its expansion, taking place under the weight of the load determining the zn, is coordinated with the deflection of the balance beam so that the coarse weight of the load to be determined can be read directly from the scale on the scale, which is enlarged by optics, which is normally for which it is used »

The invention is attached below with reference to the attached Description of the drawing, which shows an exemplary embodiment of the subject matter of the invention. The representation is conscious has been limited to those parts that are of interest in connection with the invention. Yon the analytical balance is therefore only shown the balance beam 1, which has a cutting edge bearing 2 in a known manner on a Part 3 of the balance frame, not shown, can be pivoted is stored. On the front arm 1a of the balance arm 1 is also in a known manner via a blade bearing 4, a supporting beam 5 is hinged, at the end of which a load tray 6 for placing a load 7 to be determined is attached and which is provided with several weight holders 8. On the weight holders 8 are in a known manner Shift weights 9 arranged, which by means of a switching mechanism, not shown, of the holders 8 optionally can be withdrawn. The pivoting movement of the rear Arm 1b of the balance beam 1 is transferred to a graduated scale 10 enlarged by means of optics.

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The gate scale, designed as a spring scale, consists of one Support bracket 11, which is pivotably mounted on a part 1J of the balance frame via a point bearing 12, The pivoting of the support bracket 11 takes place by means of a switching rod 14, which is attached to a rear extension 11a of the Support bracket 11 attacks. The pre-weigher is shown in the drawing in the operating position. She lets herself through pivot a downward movement of the shift rod 14 in the direction of the arrow 15 into an upper rest position.

On the upper arm of the support bracket 11 is also over a tip bearing 16 a pre-balance beam 17 mounted, the carries a counterweight 18 on its rear arm and one inde of a tension spring 19 is attached to its front arm the other end of which is anchored to a front projection 20 of the lower arm of the support bracket 11 is. The pre-balance beam 17 is also provided with a support pin in the area of the fastening point of the tension spring 19 21 provided, which in the operating position shown against a support surface 22 of the rear arm 1b of the Balance beam 1 is applied and over which the pre-weighing by the load 7 to be determined at the contact point on Balance beam 1 effective force on the pre-balance beam 17 and thus on the tension spring 19 is transmitted. The mainspring 19 is like this in its constant and its dimensions

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selected and matched to the pivoting path of the balance beam 1 that on the graduated scale 10, the coarse weight of the to determining load 7 can be read directly.

In the non-illustrated rest position of the pre-weigher, in which the support bracket 11 with the pre-weigher beam mounted on it 17 is pivoted about the top bearing 12 clockwise upwards, so that the support pin 21 from the rear Arm 1b of the balance beam 1 is lifted, the pre-balance beam 17 is lifted by the bias of the tension spring 19 held against a stop 23 attached to the upper arm of the support bracket 11.

The invention thus allows a rough determination of the weight of the load 7 to be weighed with a pre-weigher, without to do this, the shift weights 9 must be lifted off beforehand. The pre-weigher can be adjusted with a simple switching movement Lower onto the balance beam 1, whereby the balance beam 1 is released at the same time. After reading the the elongation of the tension spring 19 certain coarse weight on the graduated scale 10 is the pre-balance under simultaneous Locking of the balance arm 1 again with a simple one Lever movement raised into a buoy position in which it no longer affects the balance beam 1. Afterward When the balance arm 1 is locked, the switching weights are picked up according to the rough value determined on the graduated scale 10

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ben, the "balance bar released and the IP weighing with Using the optical scale 10 carried out.

The Yorwaage according to the invention has the additional advantage that it can also be designed as an additional device and can be retrofitted to analysis scales.

Claims (3)

-P.Ä.685 S12 * -2.12.67 Protection claims 1. Fast analytical balance with switching weights and a pre-balance for roughly determining the weight value of a Load to be weighed, characterized in that the preliminary balance (11 to 23) is formed by a spring balance is that when the switching weights (9) of the balance are placed against the arm (1b) of the balance beam that is far from the load pan (1) can be applied from above. 2. Analytical balance according to claim 1, characterized in that the expansion path of the leather (19) of the pre-balance so on the deflection of the balance beam · (1) is matched that the coarse weight of a load to be determined (7) on the optical scale (10) of the balance can be read directly. 3. Analytical balance according to claim 1 and / or claim 2, characterized in that the pre-balance has a support part (11), which is adjustably mounted on the scale frame (13) and by means of a switching rod (14) is pivotable, for example, from an upper rest position into an operating position or vice versa, in which latter the balance beam (1) acts on the spring (19) of the pre-balance via a point bearing (21). G 652-8 Analytical balance according to one of the items 1 to 3? through this characterized in that the Yorwaage is designed as an additional device that can also be added later Analytical balances can be attached.