US598073A - bohmer - Google Patents
bohmer Download PDFInfo
- Publication number
- US598073A US598073A US598073DA US598073A US 598073 A US598073 A US 598073A US 598073D A US598073D A US 598073DA US 598073 A US598073 A US 598073A
- Authority
- US
- United States
- Prior art keywords
- knife
- edges
- beams
- balance
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 20
- 210000003127 Knee Anatomy 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 240000006802 Vicia sativa Species 0.000 description 4
- 230000004075 alteration Effects 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32606—Pivoted
- Y10T403/32622—Rocking or rolling contact
Definitions
- This breadth of the knife-edges is, however, especially in large balances, not properly proportioned to the strain put upon them, and rapid wear of the knife-edges and incorrect working of the balance are the result. These inconveniences are removed in the scale-beam constructed according to the present invention.
- This beam is distinguished from those above described in being quite straight and not having its knife-edges adjusted by hand-work, but being provided with exact bearing-cuts for the knife-edges.
- Figures 1 to 3 show the balance-beam t of a table-balance which may be made of drawn steel.
- wedgeshaped cuts are made by means of a millingmachine, in which cuts the exchangeable knife-edges s are inserted and fastened by means of strap-plates Z), secured by screws.
- the depth of the bearing-cuts for the knife-edges, and in consequence the required position in height of the edge of the knife-edges can be rendered exact.
- the knife-edges made of drawn steel having a form of section corresponding with the recesses into which they are to fit. Of course they need not be triangular, as in Fig. 1, but may have, for instance, forms as shown in Figs. 4 and 5.
- Fig. 6 is shown an upper beam of former construction, and in Fig. 6 one of the new construction, as employed in decimal balances.
- the beam 0 in Fig. 6 has the bent form of a knee, as above mentioned, while the beam constructed in accordance with the present invention, Fig. 6, is entirely straight and provided, as above described, with wedge-shaped recesses for receiving the exchangeable knifeedges 8.
- the tare weight hitherto arranged on a separate guide, Fig. 6, can with this i11- vention be put directly on the beam, Fig. 6.
- Fig. 7 shows a lower beam of the old con struction, and Fig. 7 shows one of the new construction, also intended for decimal balances.
- the straight lower beam u (shown in Fig. 7) has in comparison with the lower beam in the shape of a knee, as represented in Fig. 7, another important advantage in permitting a much lower position of the'platform, which is of importance especially for putting heavy loads upon it.
- a balance-beam of the old construction for sliding-weight balances is represented, while Fig. 8 shows the construction of such a beam in accordance with the present invention.
- the balance-beam Z (shown in Fig. 8) is also made of drawn steel, on which in a known way the sliding weight p is arranged.
- an especial (separate) bar 0 for the tare weight is provided.
- the knife-edges receiving, moreover, by the shape of the bearing-recesses a much better support than in the method of fixing them used until now.
- the breadth of the knifeedges may be increased in a corresponding measure and brought into suitable proportion to the strain they have to bear.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Wood Veneers (AREA)
Description
UNITED STATES PATENT OEEIcE.
EDUARD BCHMER, OF SOHRGTTERSDORF, GERMANY.
. BALANCE.
SPECIFICATION formingpart of Letters Patent No. 598,073, dated February 1, 1898.
Application filed December 9, 1895. Serial No. 571,543. (No model.)
To all whom it may concern.-
Be it known that I, EDUARD BoHMER, a subject of the King of Prussia, German Emperor, and a resident of Schrottersdorf, near Bromberg, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Balances, of which the following is a specification.
In order to bring into one horizontal plane the knife-edges or fulcra of the upper or the lower beams, used until now for lever-balances, the formation of a bend or knee in the beam is required, which not only weakens the material at the respective spot, but renders the manufacture of the beam expensive and lengthy. The adjustment of the knifeedges on such beams has been done until now by inserting the knife-edges or axes into the beams by the use of molds or forms, the
knife-edge being then brought down to the right height by filing and grinding. It is obvious that this method of adjusting the knife-edges to the scale-beams is roundabout and inexact and can be done only by skilled workmen. Scale-beams so adjusted can be altered after having been adjusted with dishonest intentions without the illegal alteration being easily detected. Incorrect position of the knife-edge can be caused in such scale-beams also without illegal intention by an unskilled hand in sharpening or in changing the knife-edges. Moreover, the knifeedges in the scale-beams of the construction used until now cannot be much broader than double the thickness of the beams, since otherwise the support of the knife-edges is too small. This breadth of the knife-edges is, however, especially in large balances, not properly proportioned to the strain put upon them, and rapid wear of the knife-edges and incorrect working of the balance are the result. These inconveniences are removed in the scale-beam constructed according to the present invention. This beam is distinguished from those above described in being quite straight and not having its knife-edges adjusted by hand-work, but being provided with exact bearing-cuts for the knife-edges.
In the accompanying drawings various forms of such balance-beams are shown in juxtaposition with equivalent beams of the old construction.
Figures 1 to 3 show the balance-beam t of a table-balance which may be made of drawn steel. In this entirelystraight beam 25 wedgeshaped cuts are made by means of a millingmachine, in which cuts the exchangeable knife-edges s are inserted and fastened by means of strap-plates Z), secured by screws. By forming them in this way the depth of the bearing-cuts for the knife-edges, and in consequence the required position in height of the edge of the knife-edges, can be rendered exact. It will be suitable to have also the knife-edges made of drawn steel having a form of section corresponding with the recesses into which they are to fit. Of course they need not be triangular, as in Fig. 1, but may have, for instance, forms as shown in Figs. 4 and 5.
In Fig. 6 is shown an upper beam of former construction, and in Fig. 6 one of the new construction, as employed in decimal balances. The beam 0 in Fig. 6 has the bent form of a knee, as above mentioned, while the beam constructed in accordance with the present invention, Fig. 6, is entirely straight and provided, as above described, with wedge-shaped recesses for receiving the exchangeable knifeedges 8. The tare weight hitherto arranged on a separate guide, Fig. 6, can with this i11- vention be put directly on the beam, Fig. 6.
Fig. 7 shows a lower beam of the old con struction, and Fig. 7 shows one of the new construction, also intended for decimal balances. The straight lower beam u (shown in Fig. 7) has in comparison with the lower beam in the shape of a knee, as represented in Fig. 7, another important advantage in permitting a much lower position of the'platform, which is of importance especially for putting heavy loads upon it.
In Fig. 8 a balance-beam of the old construction for sliding-weight balances is represented, while Fig. 8 shows the construction of such a beam in accordance with the present invention. The balance-beam Z (shown in Fig. 8) is also made of drawn steel, on which in a known way the sliding weight p is arranged. As in the old construction also here an especial (separate) bar 0 for the tare weight is provided.
From the above description it is obvious that in the balance-beams of the new construction alteration of the knife-edges by means of filing or grinding cannot be done without detect-ion. Moreover, the knife-edges can be exchanged and replaced by others'at any time and by inexperienced hands Without aifecting in any Way the accuracy of the balance,
' as the knife-edge recesses remain always the same, the knife-edges receiving, moreover, by the shape of the bearing-recesses a much better support than in the method of fixing them used until now. The breadth of the knifeedges may be increased in a corresponding measure and brought into suitable proportion to the strain they have to bear.
I claim as my invention
Publications (1)
Publication Number | Publication Date |
---|---|
US598073A true US598073A (en) | 1898-02-01 |
Family
ID=2666717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US598073D Expired - Lifetime US598073A (en) | bohmer |
Country Status (1)
Country | Link |
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US (1) | US598073A (en) |
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- US US598073D patent/US598073A/en not_active Expired - Lifetime
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