US1104891A - Base for assay-balances and the like. - Google Patents

Description

W. HBUSSER. BASE FOR ASSAY BALANCBS AND THE LIKE.

APPLICATION FILED DEG. 20, 1913.

Patented July 28, 1914 I N VEN T 0R ii k WITNESSES:

A TTORNE Y.'

THE NURRIS PETERS C0.. PHDTO-LITHO., WASHlNnmN, n. c.

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BILSE FOR ASSAY-BALANCES AND THE LIKE,

ino-aser.

Specification of Letters Patent.

Patented July 28,1914.

Application led December 20, 1913. Serial No. 808,048;

To all Lc/icm t may concern q Be it known that I, VViLiiniD Hanssen, a citizen of the Republic of Switzerland, residing at Salt Lake City, in the countyof Salt Lake and State of Utah, have invented certain new and useful Improvements in Bases for Assay-Balances and ,tlie;,like, of which .the following is aspeciiication.

My invention relates to base plates for balances and like instruments, and has for its object to provide a base or bottomfor balances upon which the protecting case and the balance may be rigidly and accurately secured.

A further object is to provide a base that will not be affected by climatic conditions and expand, contract or warp to such an extent as to affect the perfect working of the different parts or the accuracy of the instrument.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar letters of reference indicate like parts throughout the several figures and as described in the specification forming a part of this application and pointed out in the appendedclaims.

In the drawings in which I have shown a substantial embodiment of my invention,`

Figure l is a view in perspective of the device, parts cut away, showing the upper and front sides, with portions of the protecting case. Fig. 2 is a view in perspective of the under and rear sides of the device. Fig.k 3 is a vertical section on line m of Fig. 1. Fig. 4 is a vertical section on line y g/ of Fig. 3. Fig. 5 is a longitudinal vertical section. Fig. 6 is a transverse vertical section.

Prior to my invention and use of a rigid metal base or bottom member for assayers balances and other scientific balances, the case within which the balances were housed, and the mechanical parts of the balance were mounted on a wooden base or one partially constructed of wood, and provided with a slab, of dark colored glass or similar substance, as a covering for the base and frame work, forming the bottom. When the base or frame work was subjected to theI usual climatic changes that occur through moisture, expansion and contraction, the mechanical parts of the instrument were i frequentlyaiiected andthe glass or other covering* broken yto such 'fan extent as to render the instrument worthless for the ac-v curate Aand delicate work required. c

I have invented and shown in the drawings herewith a metal base of one part, constructed and braced toprevent warping and undue lexpansion-or contraction, on which .the mechanical parts of the instrument are mounted and towhich a protectingr case for said parts is secured. In said drawings the metal base is sho-wn at A, and consists of a rectangular frame 1, with depending internally threaded bosses 9: at each corner thereof. Said frame'l has the central portion depressed or cut out to form a downward extended glass receiving and retain ing recess, within which a dark colored glass or porcelain plate l is fastened with a cushioning support 5 thereunder of'plaster of Paris or similar substances. IIhe under side of said base A has portions thereof cut out to lighten the weight of said frame l, and to form transverse or end braces 6, and a longitudinal rear brace 7. Transverse drawer guides 8 are fastened on the bot* tom of said base A within which guides thek drawers 9 are operated. Said drawers are for holding the balance weights and for the general convenience of the assayer or chemist. Within said bosses 2 are inserted the 'externally and internally threaded sleeve nuts 10 within which the adjusting or leveling screws 11 are operated. An opening 12 is cut in said plate 4: through which is inserted the standard that supports or carries the mechanical parts of the instrument. Said standard is rigidly secured to or in the bottom of said base A. It isV to be understood, that while I have shown and described va rectangularly shaped base A, the invention is not to be confined to such forms alone, as any other shape that is desired may be used, also ythat other slight changes may be made within the scope of the claims,

without departing from the spirit of the in- I therefore desire to secure by Letters Patent and claim 1. In a device of the class described the combination with the case in which assay balances are housed of a metal base having a downwardly extended recess therein; depending bosses on the corners of said base; leveling screws operable in said bosses; and a plate cushioned in said recess having an opening through one side portion thereof within which an assay balance is mounted.

2. In a device of the class described the combination with an assay balance and housing therefor, of a metal base having a downwardly and three upwardly extended recesses formed therein; depending internally threaded bosses on the corners of said base; leveling screws operable in said bosses; and a glass plate cushioned in said downwardly extended recess having an opening therethrough within which the balances are mounted.

3. A base for delicately poised instrw ments consisting of a metal frame having a depression formed in the upper side; internally threaded depending bosses on the corners of said frame; leveling means operable in said bosses; and a glass plate cushicned in said depression on a plane with the upper side of said frame and provided with an opening therein through which the balance is inserted when secured to said metal frame.

In testimony whereof I have afliXed my signature in presence of two witnesses.

"WILFRID HEUSSER.

Witnesses:

BEN L. CORUM, W; R. VUJLIAMS.

Copies ofvthis patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C.

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