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8893956 Refrigerant charge slide calculator  
A refrigerant slide calculator for determining proper refrigerant charge displays on a single side representations for performance characteristics, measured temperatures and pressures for more...
7363738 Planar display device with sliding reveal member or members  
Display devices for, e.g., advertising purposes, are provided wherein at least one member slides relative to at least one other member to a “reveal” position so as to display new and different...
6915950 Device and method for chronic wound condition treatment  
A device and method for chronic wound treatment is disclosed. The device is in the form of a slide rule which instructs the user regarding a recommended course of treatment based on the healing...
6330970 Global time calculator  
A global time calculator includes an insert and a sleeve. The insert is marked on both its sides (or on a single page slide insert on one side) with vertical columns of incremental time...
6254713 Method for producing a composite-like information carrier  
A method for producing a composite layer-like information carrier with an upper and a lower cover layer (6) and a center intermediate layer (6), having two parallel separating slits extending...
6129388 Slide chart with slide-stop flaps  
A slide chart in which the sleeve and the slide have mutually engaging flaps which click past one another upon insertion of the slide into the sleeve but engage to prevent withdrawal of the slide...
5837981 Signal outputting device of optical ruler  
A signal outputting device of optical ruler is disclosed. It includes a first guide seat formed with an internal axial chamber for receiving a reflecting plate therein, a second guide seat...
5731572 Six sigma calculator  
A slide rule permits rapid calculations of parameters used in the Six Sigma quality analysis program. For a given number of defects per product and a known number of parts per product...
5717193 Method and apparatus for determining the exponential powers of "i"  
The present invention provides methods and apparatus for readily determining the value of the imaginary number "i" raised to different exponential powers. Calculations pertaining to the imaginary...
5708260 Slide-rule calculator for computing a salary replacement value  
A retirement calculator for calculating a salary replacement value independent of current salary and a method of computing a total salary replacement value are disclosed. The retirement calculator...
5449890 Slide calculator with liner  
A slide calculator includes a sleeve having a plurality of windows for presenting data from three variables arranged in matrices of rows and columns. Opposite sides of the sliding card include...
5401942 Device for calculating no decompression dive times  
A new device including a new arrangement of dive tables is disclosed for planning non-decompression dives. The invention utilizes two separate scales, movable relative to one another. The first...
5310995 Stairway calculator  
A slide rule comprises, to calculate the parameters of a stairway to be installed between lower and upper floor surfaces, (a) a first scale on a stationary body denoting the number of risers, (b)...
5148006 Mechanical device for determining the modulus and loss factor of a damping material based upon temperature and frequency  
A device for providing the modulus and loss factor values of a damping material based upon temperature and frequency which includes (i) an insert having (a) temperature isotherms on one side, and...
4994657 Estate and gift tax estimator  
An estate and gift tax estimator having a two-sided pocket part consisting of separate layers of semi-rigid material, whereby each layer is provided with a series of windows for viewing an insert...
4994656 Logic design slide rule  
A logic design slide rule comprises, in a preferred embodiment, front and rear cover plates coupled together; interior slide channels formed between the covers; and a plurality of slides disposed...
4960029 Musical scale determining device  
A musical scale determining device which takes the form of a conventional slide rule configuration. The device includes a sheet material body. Upon both the front and back surface are printed...
4798940 Manual calculator for analog and digital numbers  
A manual calculator useful in registering and converting whole and fractional numbers from one numbering system to another numbering system in which a plurality of slide members are arranged in an...
4785164 Slide calculator for background lighting  
There is disclosed herein a slide calculator for determination of flash-to-background distance for studio photography when using color filters over the flash. By use of the calculator, known...
4775779 Slide rule for selecting material for constructing bearing  
A slide rule for selecting bearing materials has a base plate, a fixed cursor having first, second and third portions spaced apart from one another and fixedly attached to the base plate, a first...
4772780 Slide calculator for photographic lighting  
The object of the invention is to provide a slide calculator to make the determination of flash-to-subject working distances (WD) easy and accurate for amateur and professional photographers....
4750398 Chord speller  
A chord speller is provided and consists of a housing with a vertical slide member and a horizontal slide member intersecting and overlapping the vertical slide member. The horizontal slide member...
4678893 Method and means for determining the ease with which a cow may give birth to a calf  
The present invention comprises a method and device for determining the ease with which a cow may give birth to a calf. It includes a slide rule having two movable slides and a fixed slide. The...
4634147 Redeemable coupon  
A refund coupon redeemable at a cash value at retail stores when a proof-of-purchase comprising a portion of a given product's packing packaging is affixed to the coupon. The coupon includes...
4585927 Apparatus for predicting the exact time of currents in terms of the year, month, day and hour  
Apparatus for presenting tidetable data in a form visually readable to the average person in terms of the year, month, day and hour of occurrence, exacting information regarding current flow, i.e....
4538055 Slide rule  
A slide-rule is obtained by superpositioning and connecting three plates (1, 2, 3) into the middle one of which slots (20, 21) are milled, and thereafter cutting off the boundary areas (5, 6, 7,...
4454410 Multi-variable analog computer  
An analog computer for solving and displaying an answer to a multivariable problem includes a bottom plate upon which a matrix of the solution set to the problem appears. Overlying the bottom...
4425499 Decision tree graphical computer  
A graphical logic computer is formed by apertured parameter slides that are moved back and forth in an envelope between an apertured cover member and a back panel. The cover member has an event...
4390778 Calculator for determining optimum tone reproduction  
A mid-tone calculator for determining density reproduction to maximize color reproduction in a lithograph tone process. The calculator includes a base having a longitudinal guideway therein, an...
4368044 Bowler's approach starting location calculating device  
A calculating device for a bowling game whereby a bowler can readily ascertain an optimum approach starting location for throwing a bowling ball along a path which will maximize the number of pins...
4352978 Analog balance  
A calculating device comprising a rockable cradle having a number of parallel grooves formed in its upper surface, each of which supports a beam provided on at least one of its faces with a...
4272107 Tide time indicator  
A tidal time indicator for determining tide times at various locations on a specific stretch of coastline comprises a pair of complementary charts. One of the charts is in the form of a map having...
4262939 Slide chart manufacture  
A method for the manufacture of a slide chart, utilizing high speed, straight line gluing and folding machinery, from a unitary blank having a flat sheet separated into three segments, a first and...
4233768 Slide calculator  
A sheet of two contiguous detachable leaf members is folded and separated to form slide and sleeve components of the calculator. Fold lines in the sheet are formed parallel to a separation or tear...
4132348 Slide calculator and method  
A construction comprising a sheet of two contiguous detachable leaf members is folded and separated to form slide and sleeve components of the calculator. Fold lines in the sheet are formed...
4071189 Slide rule cursor  
A slide rule cursor which is adapted for use with conventional slide rules to provide direct resolution of the resultant value of parallel and/or series impedances. The cursor is not only movable...
3916162 Slide rule  
A frame for the slide rule is composed of two longitudinal members of identical shape fitting and locking together when one is assembled to the other with a relative 180° difference in...
3902656 Slide calculator construction  
An article formed of a single blank of cardboard and adapted to be used as a slide calculator is provided. A single blank including several panels having removable tabs formed thereon, certain of...
3853265 NOMOGRAM TYPE CALCULATOR SLIDABLE RULE  
A slidable nomograph device having an erasable and slidable rule moved beneath a plurality of partially transparent nomograph fields, charts, curves, etc. The user writes on the rule surface by...
3837569 METRIC CONVERSION RULER  
This device for converting British units to metric units and vice versa includes a pair of spaced, rigidly affixed members each provided with a two-cycle logarithmic scale and a slide plate...
3829663 SLIDE RULE WITH DECIMAL POINT LOCATION MEANS  
A logarithmic scale slide rule having means for readily determining decimal location comprising a system of oppositely-facing base-color and contrast-color brackets enclosing each 1 to 9.9999...
3817102 COMBINED TEMPERATURE-HUMIDITY INDEX COMPUTATION KIT  
Wet bulb, dry bulb and black globe analog thermometers are mounted in parel on shock-proof support bars within a hinged-top box. The support bars are themselves mounted on hinges so that the...
3814308 CALCULATING DEVICE  
A calculator for estimating concrete mix proportions of air, cement, water, fine and coarse aggregates comprising a calculating device having a pair of linear scales, a pair of logarithmic scales...
3784093 FACTORMATIC SLIDE RULE  
A slide rule extending the physical dimensions and calculating capacity of a logarithmic scale comprising a frame having start-answer index lines at its respective ends slidably supporting a...
3782626 SLIDE RULE WITH IMPROVED CALCULATING CAPACITY  
A slide rule with improved calculating capacity has, in addition to the A, B, C, D and related scales, a folded square scale BF whose origin π coincides with the left-hand indices 1 of the...
3747847 SLIDE RULE GUIDE TO INTRAVENOUS THERAPY  
This specification discloses a slide rule guide intended for use in intravenous therapy to aid a doctor or nurse in determining the character and quantities of materials to be injected into a...
3733470 SLIDE RULE OF GENERAL USE OF POCKET SIZE  
A slide rule has a rule face provided with a number of scales, a reglet whose face is provided with compartment scales for normal slide rule operation, and a cursor or slide is shiftable over the...
3729130 FOOTBALL SLIDE RULE  
Slide rule device for use in connection with a football game, including a scale laid out to correspond to the yard line markers on a football playing field, an indicator for marking the starting...
3724083 MAGNETIC STRIP DRAFTING INSTRUMENT  
An instrument comprising two or more elongated flexible strips of plastic having magnetic properties such that when the strips are in a first position relative to one another, they overlap their...
3719806 APPARATUS FOR CALCULATING HALFTONE SCREEN EXPOSURES  
An improved method and apparatus for calculating halftone screen exposures to produce photographic halftone reproductions useful in printing applications. In one embodiment, a slide-rule type...
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