Patent US3811327A successfully refreshed from Google Patents.
US3811327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balancing apparatus with an optical unbalance indicator
Assignee: Carl Schenck AG
•
Filing: 1973-04-03
•
Granted: 1974-05-21
•
Expires: 1993-04-03
Abstract
Abstract The present balancing apparatus includes an optical indicator which enables the operator to balance a workpiece, for example an impeller wheel of a super charger, in two balancing planes, even simultaneously, if desired. Two vector meters with respective display screens are used one for each balancing plane. A light spot providing an unbalance indication and further optical markings are projected onto the respective screen to provide direct information regarding the unbalance location and regarding the nature of the balancing operation to be performed. The optical markings are projected with the aid of selsyn driven diaphragms having slots therein which are shaped to correspond to the shape of the markings. Due to the selsyn drive the workpiece rotation and the diaphragm rotation are synchronized with each other whereby the operator may read off all the information from the two screens for balancing the workpiece without any extra calculations.
Inventors
- 👤 H Hack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/30; F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/284; F04D29/66; F04D29/661; F04D29/662; G01M1/14; G01M1/16; G01M1/22; F05; F05D; F05D2220/00; F05D2220/40
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
206 words
In a balancing apparatus including means for optically indicating the unbalance of a workpiece on a polar coordinate display screen having an origin and concentric circles, means for displaying on said screen a first optical marking representing in a vectorial manner the magnitude and direction of unbalance of the workpiece, means for displaying on said screen a second optical marking corresponding to a fixed angular position of the workpiece and means for coinciding said first marking and said second marking with each other by rotating the workpiece, wherein the mass distribution of said workpiece may be varied in a given region to remove said unbalance by means of an unbalance compensating tool including tool feed advance means, the improvement wherein said means for displaying said second optical marking comprise means for displaying at least two marking elements to form a display pattern in which the marking elements extend symmetrically with respect to said fixed angular position of the workpiece whereby the marking elements are spaced from each other so that the spacing between said marking elements at circles concentric with said origin corresponds to the angular width of said given region on said workpiece for balancing the workpiece by varying the mass distribution in said region.
Claim 2
Dependent Claim
206 words
In a balancing apparatus including means for optically indicating the unbalance of a workpiece on a polar coordinate display screen having an origin and concentric circles, means for displaying on said screen a first optical marking representing in a vectorial manner the magnitude and direction of unbalance of the workpiece, means for displaying on said screen a second optical marking corresponding to a fixed angular position of the workpiece and means for coinciding said first marking and said second marking with each other by rotating the workpiece, wherein the mass distribution of said workpiece may be varied in a given region to remove said unbalance by means of an unbalance compensating tool including tool feed advance means, the improvement wherein said means for displaying said second optical marking comprise means for displaying at least two marking elements to form a display pattern in which the marking elements extend symmetrically with respect to said fixed angular position of the workpiece whereby the marking elements are spaced from each other so that the spacing between said marking elements at circles concentric with said origin corresponds to the angular width of said given region on said workpiece for balancing the workpiece by varying the mass distribution in said region.
Claim 3
Dependent Claim
69 words
The apparatus according to claim 1, including milling means for milling off the workpiece an arc having a predetermined depth and radius in said workpiece for balancing the workpiece, the improvement wherein said angular spacing between said marking elements at any of said circles about the origin corresponds to the length of said arc required for balancing the workpiece when the first optical marking is positioned on said circle.
Claim 4
Dependent Claim
65 words
The apparatus according to claim 2, wherein said two marking elements merge with each other in the vicinity of said origin to form a radially extending straight line for indicating a range wherein balancing may be effected solely by drilling a single hole in said workpiece with said milling means, wherein the lines separate from said straight line at a determined radius from said origin.
Claim 5
Dependent Claim
78 words
The apparatus according to claim 1, including means for drilling holes having a determined depth and diameter in said workpiece for balancing said workpiece, the improvement wherein said marking elements are straight line elements extending radially with respect to said origin, whereby the angular spacing between said line elements corresponds to the angular spacing between holes to be drilled for balancing said workpiece and whereby the radial position of said first optical marking cOrresponds to a balancing quantity.
Claim 6
Dependent Claim
37 words
The apparatus according to claim 4, wherein the radial spacing between the origin and said first optical marking corresponds to the number and the depth of one or more holes to be drilled for balancing said workpiece.
Claim 7
Dependent Claim
65 words
The apparatus according to claim 4, comprising means for projecting further marking elements onto said display screen for representing the amount of unbalance, means for coupling said projecting means to said tool feed advance means whereby said further marking elements are moved in response to the tool movement until they cross said first optical marking, said crossing indicating that the correct balancing has been accomplished.
Claim 8
Dependent Claim
17 words
The apparatus according to claim 6, wherein parts of said further marking elements are straight line elements.
Claim 9
Dependent Claim
17 words
The apparatus according to claim 6, wherein parts of said further marking elements are spiral line elements.
Claim 10
Dependent Claim
160 words
The apparatus according to claim 1, comprising means for milling off a region of a given arc length on one side of said workpiece, means for drilling a hole on the other side of said workpiece, said means for displaying said second optical marking comprising means for displaying on the screen a first pattern including a first pair of lines symmetrically and angularly spaced from said fixed angular position of said workpiece, the angular spacing between the first pair of lines at any circle corresponding to said arc length, and means for displaying on said screen a second pattern including a second pair of lines extending radially with respect to said origin, the angular spacing between said second pair of lines corresponding to the angular spacing between holes to be drilled on the other side of said workpiece for balancing said workpiece, and wherein the radial position of said first optical marking corresponds to a quantity for balancing said workpiece.
Claim 11
Dependent Claim
19 words
The apparatus according to claim 9, comprising means for simultaneously milling off said arc length and drilling said hole.
Claim 12
Dependent Claim
44 words
The apparatus according to claim 1, for balancing a workpiece by applying weight means to the circumference of the workpiece, wherein the angular spacing between the two marking elements corresponds to the circumferential length of said weight means at each circle about said origin.
Claim 13
Dependent Claim
164 words
In an apparatus for balancing workpieces including means for rotatably supporting a workpiece, balancing means for removing material from or adding material to the workpiece at determined distances from the axis of rotation thereof through an angular range, a display screen, means for displaying a first optical marking on said screen corresponding to the magnitude and angular position of an unbalance of said workpiece, and means for displaying a second optical marking on said screen corresponding to the relative angular distance between the balancing means and the position of an unbalance as represented by the first optical markings; the improvement wherein said means for providing said second optical marking comprises means for projecting a pattern on said screen having a pair of visible lines which extend relative to the origin and are symmetrically, angularly positioned with respect to the position of the first marking and wherein the angular distance between said lines at any circle concentric to said origin corresponds to said angular range.
Claim 14
Dependent Claim
164 words
In an apparatus for balancing workpieces including means for rotatably supporting a workpiece, balancing means for removing material from or adding material to the workpiece at determined distances from the axis of rotation thereof through an angular range, a display screen, means for displaying a first optical marking on said screen corresponding to the magnitude and angular position of an unbalance of said workpiece, and means for displaying a second optical marking on said screen corresponding to the relative angular distance between the balancing means and the position of an unbalance as represented by the first optical markings; the improvement wherein said means for providing said second optical marking comprises means for projecting a pattern on said screen having a pair of visible lines which extend relative to the origin and are symmetrically, angularly positioned with respect to the position of the first marking and wherein the angular distance between said lines at any circle concentric to said origin corresponds to said angular range.
Claim 15
Dependent Claim
18 words
The apparatus according to claim 12, wherein said visible lines are curved lines and emanating from said origin.
Claim 16
Dependent Claim
19 words
The apparatus according to claim 12, wherein said lines are straight lines extending radially with respect to said origin.
Claim 17
Dependent Claim
52 words
The apparatus according to claim 1, wherein said means for displaying at least two marking elements comprise a diaphragm having radially extending slots therein, said slots having an angular spacing therebetween corresponding to the angular spacing between balancing holes to be drilled in the workpiece, and selsyn means for driving said diaphragm.
Claim 18
Dependent Claim
54 words
The apparatus according to Claim 1, wherein said means for displaying at least two marking elements comprise a diaphragm having two curved slots therein, said curved slots having an angular spacing from each other which corresponds to an arc length of an arc to be milled off, and selsyn means for driving said diaphragm.
Claim 19
Dependent Claim
25 words
The apparatus according to claim 16, wherein said two curved slots merge into a single slot extending radially substantially from the center of said diaphragm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |