US3842925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for raising weights in precision balances
Assignee: Individual
•
Filing: 1972-10-03
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Granted: 1974-10-22
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Expires: 1992-10-03
Abstract
Abstract Device for raising weights in precision balances, such as analytical balances, in which a number of weights from the smallest to the largest are disposed substantially in a single plane and are made associated with at least two pusher raising elements mobile in a direction substantially orthogonal to the plane of the weights, the pusher raising elements being raised by programmed operating means including rotatable annular disc members and cam means provided thereon. The disc members are rotated by acting on the weighing control members of the balance.
Inventors
- 👤 C Crespi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:44
CPC Classifications
G; G01; G01G; G01G1/00; G01G1/18; G01G1/26; G01G1/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
211 words
A device for raising and lowering the weights in precision balances of the type having a balance beam, a support member suspended at one end of said balance beam, a plurality of annular weights supported by said support member concentrically to each other in a substantially horiziontal plane, and manually operable control means for controlling the raising and lowering of said weights, the device comprising a base for removable connection to said balance below said support member, guiding means provided over said base and extending below said weights substantially radially thereto, a plurality of pusher elements including pins slidable within said guiding means substantially perpendicularly to the plane of said weights for raising and lowering said weights, means for operating said pins including rotatable annular disc members arranged concentrically to each other in the same plane below said guiding means and having an upper face provided with cam means for engaging said pins and a lower face provided with operating means for independent rotation of said disc members, said operating means being operatively connected to said manually operable control means of the balance, whereby operation of said control means causes rotation of said disc members and raising and lowering of said weights according to a program defined by said cam means.
Claim 2
Independent Claim
211 words
A device for raising and lowering the weights in precision balances of the type having a balance beam, a support member suspended at one end of said balance beam, a plurality of annular weights supported by said support member concentrically to each other in a substantially horiziontal plane, and manually operable control means for controlling the raising and lowering of said weights, the device comprising a base for removable connection to said balance below said support member, guiding means provided over said base and extending below said weights substantially radially thereto, a plurality of pusher elements including pins slidable within said guiding means substantially perpendicularly to the plane of said weights for raising and lowering said weights, means for operating said pins including rotatable annular disc members arranged concentrically to each other in the same plane below said guiding means and having an upper face provided with cam means for engaging said pins and a lower face provided with operating means for independent rotation of said disc members, said operating means being operatively connected to said manually operable control means of the balance, whereby operation of said control means causes rotation of said disc members and raising and lowering of said weights according to a program defined by said cam means.
Claim 3
Dependent Claim
55 words
A device as claimed in claim 1, wherein said operating means for independent rotation of said disc members comprise an annular toothing provided on the lower face of each of said disc members concentrically thereto, each of said toothings being operatively connected to said manually operable control means of the balance by means of gearing.
Claim 4
Dependent Claim
88 words
A device as claimed in claim 1, wherein with at least one of said disc members there are associated four weigths having respective values capable of defining an entire weight decade, and wherein said cam means are arranged on the upper face of said disc members along concentric annular paths, said cam means having cam portions located along said paths at angularly spaced of 36* or multiples thereof, whereby after one complete turn of said disc member all the weights of the entire weights decade have been raised.
Claim 5
Dependent Claim
79 words
A device as claimed in claim 1, wherein said guiding means comprise two crosspieces arranged at right angLes to each other in a substantially horizontal plane above said disc members, said crosspieces each having pairs of through bores for receiving respective pairs of said pins, each pair of said pins engaging one of said weights at diametrically opposite points, the pairs of pins relative to adjacent weights being disposed alternatively in the one and the other of said crosspieces.
Claim 6
Dependent Claim
112 words
A device as claimed in claim 1, wherein at least one of said disc members has an external cam comprising two cam portions arranged opposite to each other along annular concentric pathes of slightly different radii and each extending for a half of its circumference, with each of said cam portions being associated one pin comprising an upper and a lower shank, the shanks of one of said pins being coaxial to each other and the shanks of the other of said pins being off-centered, whereby the said upper shank engages the corresponding one of said annular weights and the said lower shank engages the corresponding one of said two cam portions.
Claim 7
Dependent Claim
19 words
A device as claimed in claim 5, further comprising a spring interposed between said upper and said lower shank.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |