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Class Information
Number: 33
Name: Geometrical instruments >
Description: This class provides for means for determining the characteristics and the mutual relation of points, lines, angles, surfaces, and solids, considered as having no properties but those arising from extension and difference of situation. It includes mechanically guided means for describing lines. Processes or methods are classified in the appropriate subclasses with instruments unless specifically provided for by a process subclass. For the most part specific subclasses are not provided for compound instruments; but an invention comprising matter classifiable in more than one specific subclass is placed in the subclass having the lowest number and cross-referenced into the subclass or subclasses having the higher number or numbers.

Class Number	Class Name	No. of Patents
33/DIG.2	Air	64
33/2R	Apparel	43
33/3R	Footwear	40
33/4	Laying out	3
33/5	Patterns	5
33/3C	Multiple indicating means interconnected	16
33/3B	Multiple indicating means, independent	18
33/6	Processes	15
33/3A	Single measuring or indicating means	16
33/2H	Hems and cuffs	10
33/11	Laying out	32
33/16	Adjustable	8
33/12	Patterns and charts	42
33/14	Adjustable	16
33/15	Conforming	14
33/13	Perforated	11
33/7	Leveling features	3
33/17R	Processes	56
33/17A	Pattern grading	15
33/8	Stand supported	4
33/9R	Skirts	3
33/10	Platform	5
33/9A	Powder-marking	1
33/2A	Stocking gauge	5
33/121	Area integrators	26
33/123	Electrical	18
33/122	Planimeters	7
33/124	Rolling contact	18
33/DIG.16	Clips and rafters	2
33/DIG.6	Dial indicator shock absorber	8
33/DIG.5	Differential transformer	10
33/700	Distance measuring	97
33/712	Article support integral with measuring means	31
33/755	By flexible tape	148
33/760	Combined	172
33/756	Cord type	47
33/770	Including attachment	164
33/757	Means to keep tape straight	33
33/761	Specified reel housing feature	136
33/769	Housing shape, structure or material	81
33/768	Including attachment	100
33/767	Including brake or lock	109
33/766	Inside-outside measure	6
33/765	Opening in housing for reading tape	13
33/764	Plural tapes	19
33/762	With meter	29
33/763	Including computing means	52
33/771	Specified tape material	33
33/759	Specified use	150
33/758	With adhesive or securing means	112
33/709	Convertable to another type measuring means	10
33/703	Environmental isolation	16
33/705	Sealing	26
33/704	Thermal	20
33/702	Error compensation (e.g., temperature)	118
33/710	Machine parts	37
33/711	Rolling contact	17
33/732	Of flexible material	33
33/734	By rolling contact	20
33/744	Belt type	6
33/743	Combined	3
33/738	Having rectilinear scale	2
33/747	Opposed rotating surfaces	10
33/748	Plural	3
33/749	Only three	0
33/746	Rotating and stationary surfaces	2
33/735	With computing means	34
33/736	With particular electric output or circuit	6
33/737	With recording or marking means	10
33/739	With signal means	6
33/740	With stop means	9
33/742	By clutch	0
33/741	For motor	3
33/745	Zero setting means	1
33/750	Predetermined stop or signal means	8
33/733	Supply (e.g., bolt, roll)	25
33/753	With gear means to move indicator	1
33/751	With marking means	7
33/752	With ratchet means to move indicator	0
33/754	With take up reel	7
33/772	Of length by rolling contact	42
33/776	Belt type	8
33/775	Combined	30
33/774	Having rectilinear indicator	2
33/779	Implement	10
33/780	With digital indicator	20
33/781	Including handle for implement	17
33/782	With handle	8
33/777	Inside tube	5
33/778	On running material (e.g., mill type)	13
33/773	With computing means	52
33/783	Opposed contacts	158
33/810	Beam type with scale	61
33/812	Including means to lock one contact member	17
33/811	With means to adjust one contact member	25
33/784	Digital indicator	111
33/809	Exstensible-rule type	69
33/787	Extensometer	30
33/790	Including means to clamp indicator to material	22
33/788	With circuit means	11
33/789	Including differential transformer	4
33/785	Fluid indicator	5
33/786	Liquid column indicator	5
33/813	Micrometer	39
33/831	Details (e.g., spindle or anvil adjustment, material	21
33/814	Differential screw	7
33/827	Inside measurement only	16
33/818	With additional indicator	5
33/819	Digital	22
33/820	Electrical	14
33/828	With attachment	9
33/829	Particularly adapted for measuring threaded element	13
33/817	With lock	2
33/815	With means for maintaining a constant or limited pressure on the contacts	18
33/821	With preliminary setting arrangement	6
33/822	By disengaging threaded element	2
33/826	By use of interchangeable parts of different sizes	2
33/823	Micrometer slidably mounted on a beam	1
33/824	Other contact slidable on beam	0
33/825	Spindle or micrometer slidable	0
33/830	With special scale markings	9
33/816	With wear compensation or backlash prevention means	2
33/791	Optical indicator	9
33/807	Pivoted type with scale	13
33/808	With adjustment means	2
33/806	Rectilinear indicator	21
33/792	Rotary indicator	12
33/803	Bench type	18
33/804	Lever actuator	4
33/793	Electrically controlled	14
33/794	Hand held implement	21
33/795	Beam type	13
33/796	Nonpivoted type with scale	14
33/797	Pivoted type	22
33/798	Center pivot	3
33/801	With scale	3
33/799	With screw or gear adjustment means	0
33/800	With spring adjustment means	2
33/802	Rectilinear push or pull actuator	10
33/805	With work support	7
33/701	Process	60
33/706	Scale reading position sensor (e.g., grid counting)	241
33/708	Magnetic	91
33/707	Optical	207
33/832	Single contact with a work engaging support	210
33/833	Adapted for a particular workpiece	154
33/834	Coating or surface layer thickness	38
33/836	Depth of aperture or groove	94
33/835	Reeled material	3
33/837	Fluid actuated indicator	8
33/838	Screw adjustment	13
33/713	Sounding type	8
33/719	Depth indication	30
33/721	For nongaseous material	8
33/722	Liquid (e.g. dipstick)	46
33/729	Shape of indicator	11
33/725	With cleaning means	13
33/727	With filter or vent	8
33/726	With guide	21
33/730	With holder or housing for indicator	17
33/731	Including seal	16
33/728	With lock means	10
33/723	With means to adjust measuring rod	11
33/724	Having plural contacts	1
33/716	Including electrical signal means	21
33/720	Line with weight	26
33/714	With electric control means	4
33/715	Of line	20
33/717	With sampling means	21
33/718	Hole type	0
33/DIG.8	Eccentrics	10
33/DIG.18	Flush pin gauges	1
33/501	Gauge	80
33/511	Anatomical	100
33/512	Human	400
33/514.2	Conformator	24
33/513	Dental	43
33/514	With mouth or teeth contact	55
33/515	Having a support or foot locator for body	82
33/514.1	Ring type	10
33/534	Angle	152
33/538	Fixed pivot at one end	28
33/536	Sine, cosine, or tangent bar	16
33/537	Article support	12
33/535	Squareness	32
33/600	Automotive	167
33/609	Brake	12
33/610	Drum or shoe	11
33/603	Connecting rod	10
33/604	With piston	0
33/602	Distributor point setting	2
33/611	Engine valve, valve-stem, or tappet	10
33/608	Frame alignment	97
33/607	Fuel pump, injection nozzle or valve, or carburator	8
33/601	Mechanical engine timing by piston contact in engine cylinder	6
33/605	Piston, piston ring, or crankshaft	23
33/606	Power train	12
33/612	Torsion bar	2
33/193	Axle	20
33/517	Bearing or bearing part	50
33/509	Bowling ball	16
33/510	Grip	14
33/662	Button or buttonhole	10
33/519	Cam profile or keyway	10
33/520	Center, point, distance between centers, or centerline location	185
33/555.1	Circular size	166
33/555.3	"v" type	37
33/555.2	Aperture type	41
33/555.4	Flexible band type	48
33/613	Collocating	440
33/645	Alignment	470
33/652	Burner fuel emitting member with respect to electrode spacing	3
33/644	Centering or point location	183
33/646	Clapboard lapping	17
33/647	Having tab for supporting bottom of clapboard	36
33/624	Earth contacting or working	20
33/625	Trenching tool depth	1
33/653	Insignia with respect to garment, e.g., uniform	6
33/655	Machine parts	70
33/656	Electrical dynamo	5
33/661	Plural axes center for common axis	24
33/657	Rolls, or roll and coacting part	59
33/658	Typewriter	0
33/659	Watch	0
33/660	Wheel quartering or crank arm, connecting rod or crank pin with respect to one or the other	0
33/614	Printing member registration	54
33/622	Hand stamp registration with respect to printing location on sheet to be printed	5
33/615	Photographic member or holder with respect to surface	6
33/617	Printing type or plate	23
33/618	Curved printing member with respect to its support	30
33/619	Page form registration with respect to its support or to another form on same support	2
33/621	Plate registration with respect to plate support	39
33/620	Plate registration with respect to second plate or printing sheet	18
33/616	Transparent registration sheet to align printing on member	7
33/651	Railway track or railway vehicle part	23
33/651.1	Track type	14
33/623	Sheet registering device	36
33/648	Shingle lapping gauge	26
33/649	Having tab on underside of shingle	18
33/650	Shoe, shoe part, or last	2
33/626	Tool or surrogate	82
33/628	Cutter or shaper	97
33/632	Axis of rotary cutter with respect to axis of cylindrical workpiece	3
33/636	Bit with respect to its holder	10
33/637	Boring bar holder	7
33/638	Bit with respect to workpiece or workpiece holder	63
33/640	Circular cutter with respect to workpiece or workpiece support	78
33/630	Cutter with respect to workpiece end	32
33/631	Shears	4
33/639	Drill or bit with respect to chuck or spindle holder	19
33/633	Planar blade with respect to its holder or another part	23
33/634	With respect to its rotary holder	5
33/635	Plural blade holder	5
33/629	Screw thread	2
33/641	With respect to support	13
33/627	Die	12
33/643	Millstone with respect to millstone shaft	0
33/642	Spindle or chuck with respect to workpiece or workpiece support	81
33/654	Valve	4
33/501.05	Comparator	26
33/501.06	Beam type	10
33/501.07	Three contact probes	1
33/501.6	Electric type	28
33/501.08	Hand held	18
33/501.09	Plural contact probes	16
33/501.45	Fixed size	50
33/501.3	Only four probes	5
33/501.1	Only three probes	6
33/501.2	With rotary indicator	7
33/501.4	With rotary indicator	11
33/501.5	With pivot means	11
33/545	Comparison with a standard	48
33/546	Profile	52
33/547	Optical comparison	12
33/561.1	Conformator or adjustable curve template	43
33/561.2	Flexible type	35
33/561.3	Including plural adjustment means	12
33/522	Container	32
33/501.02	Continuous gauging	72
33/501.03	Including electric means	54
33/501.04	Pivoted probe	41
33/503	Coordinate movable probe or machine	533
33/194	Door and window	84
33/521	Earth profile or road grade or shrub or tree trim guide	42
33/526	Flooring, floor or wall covering, or molding	83
33/527	Floor covering	43
33/508	Golf stance, swing or club analysis	79
33/556	Having a movable contact probe	252
33/558	Electrical switch or transducer responsive to probe or probe is part of electrical circuit	245
33/557	Plural probes	68
33/505	Having program control or an analogue to digital device	67
33/195	Hoof	9
33/542	Internal	214
33/543	Concentricity or eccentricity	62
33/544	Earth cavity or tube	68
33/544.2	Having means to actuate probe	27
33/544.3	Biased probe	54
33/544.1	Including means to rotate probe	14
33/543.1	Fluid type	9
33/544.5	Having more than two probes	30
33/544.6	Only three probes	8
33/544.4	Tapered probe	22
33/542.1	Telescoping caliper or stem gauge	17
33/501.01	Leather grading or size	1
33/507	Lens	99
33/539	Lock or key	14
33/540	Cylinder lock tumbler decoder	19
33/518	Masonry construction	54
33/196	Millstone	0
33/197	Mortise	71
33/559	Movable contact probe, per se	258
33/560	Plural probes	35
33/561	With electrical switch or transducer responsive to probe	272
33/524	Pie, cake, cheese, pizza, or sandwich portion	14
33/525	Pie, cake, cheese, pizza or sandwich portion	4
33/529	Pipe layout or fitting	122
33/530	Pitchometer	21
33/558.01	Pivoted probes (e.g., divider, caliper, etc.)	34
33/558.04	Having adjustable legs	9
33/558.05	By screw means	0
33/558.09	Having opposed threads	1
33/558.07	Median	0
33/558.08	Quick adjustment	0
33/558.1	Rotatable nut	0
33/558.06	Tangent	0
33/558.5	Median handle	4
33/558.4	Pivoted probe	8
33/558.2	Plural legs or contact probes	15
33/558.03	Point parallelizing	3
33/558.02	Proportional	10
33/558.3	Removable probe	4
33/548	Plural tests	45
33/516	Point reproducer	6
33/541	Postage stamp or mechanical coupling gauge	6
33/572	Probe support	79
33/663	Proportional line segmenter	11
33/665	Dividers	2
33/664	Parallelogram type	10
33/199R	Screw thread	103
33/199B	Bench type	16
33/679.1	Special scale markings	78
33/200	Spectacle	104
33/533	Straightness, flatness, or alignment	247
33/567	Surface plate or gauge block	91
33/567.1	Adjustable gauge block	12
33/531	Taper	29
33/532	External	19
33/506	Target, weapon, or weapon projectile	46
33/562	Template	401
33/563	Single sheet type	141
33/564	Alphabetical or numerical symbol type	27
33/565	Geometrical figure, three dimensional to two dimensional figure or curve	52
33/566	Line or guide	86
33/201	Tool	43
33/202	Saw	27
33/501.7	Tooth testing (e.g., gear, rack)	25
33/501.8	By electrical comparison	11
33/501.9	Including a probe	35
33/501.13	By pair of engaged gears	19
33/501.14	By probe	21
33/501.16	Including a master	4
33/501.17	Plural probes	2
33/501.18	Only two	8
33/501.15	Teeth spacing	7
33/501.19	By rotary master	14
33/501.11	Implement type	5
33/501.12	Internal	3
33/528	Wall panel outline marker for utility	117
33/203	Wheel	115
33/203.18	Axle, vehicle, or wheel supported	270
33/203.19	Plane and radius	29
33/203.2	Trammel	15
33/203.15	Floor supported, wheel contacting	48
33/203.16	Plane and radius	21
33/203.17	Trammel	10
33/203.21	Trammel	5
33/203.11	Tread contour	15
33/203.1	Watch	0
33/203.12	With wheel supporting means	82
33/203.14	Pivoted or sliding scuff board	26
33/203.13	Roller or drum	37
33/502	With calibration device or gauge for nuclear reactor element	189