| Class Number |
Class Name |
No. of Patents |
| 236/DIG.1 |
Adjustable lever |
6 |
| | Air-relief valves | |
| | Radiator type | |
| | Thermostatic | |
| 236/63 |
Expanding float |
0 |
| 236/64 |
Expanding fluid |
6 |
| 236/65 |
Float-operated |
1 |
| 236/66 |
Expanding solid |
4 |
| 236/61 |
With pressure control |
4 |
| 236/62 |
With separate float |
2 |
| 236/8 |
Atomizer type of burner |
0 |
| 236/6 |
Brooder type of heater |
8 |
| 236/DIG.6 |
Clamp on |
7 |
| 236/20R |
Closed fluid heaters |
100 |
| | Combined thermostat and flow controlled | |
| 236/23 |
One valve |
6 |
| 236/24 |
Two or more valves |
5 |
| 236/24.5 |
Flow and pressure controlled |
3 |
| 236/25R |
Flow controlled |
20 |
| 236/25A |
Flow responsive valve controlling fuel |
16 |
| 236/26R |
Pressure-operated |
5 |
| 236/30 |
Bourdon type |
0 |
| 236/31 |
Float |
0 |
| 236/26A |
Gas burner controls |
5 |
| 236/26C |
Pressure responsive elements per se |
1 |
| 236/26B |
Pressure responsive means controls draft |
0 |
| 236/26F |
Pressure responsive means controls fluid coupling |
0 |
| 236/26D |
Pressure responsive means controls forced draft |
2 |
| 236/26E |
Pressure responsive means controls oil burner |
1 |
| 236/29 |
Relay, puppet |
0 |
| 236/28 |
Stroke retarding |
0 |
| 236/27 |
With balancing pressure chamber |
1 |
| 236/22 |
Radiator type |
4 |
| 236/21R |
Safety cut-out |
24 |
| 236/21B |
Water heater control with excessive temperature cutoff |
28 |
| | Thermostatic | |
| 236/32 |
Expanding fluid |
5 |
| 236/33 |
Expanding solid |
1 |
| 236/20A |
Top burner control |
14 |
| 236/DIG.7 |
Coil bulb |
2 |
| 236/14 |
Combined boiler and furnace controlled |
54 |
| 236/16 |
Combined draft and check control |
16 |
| 236/9R |
Combined heater and apartment controlled |
12 |
| 236/9A |
Combined heating and apartment control with heating medium circulation control |
31 |
| 236/DIG.8 |
Computer |
8 |
| 236/34 |
Cooling radiator |
37 |
| 236/35 |
Air control |
43 |
| 236/35.2 |
Shutters |
12 |
| 236/35.3 |
Servomotor |
10 |
| 236/34.5 |
Bypass |
280 |
| 236/51 |
Distance-adjusted |
459 |
| 236/45 |
Draft-operated |
36 |
| | Exchange heaters | |
| 236/17 |
Pressure-operated |
2 |
| | Thermostatic | |
| 236/18 |
Expanding fluid |
12 |
| 236/19 |
Expanding solid |
1 |
| 236/DIG.11 |
Expandible fluid |
3 |
| 236/DIG.2 |
Fail safe |
47 |
| 236/DIG.9 |
Fan control |
56 |
| 236/DIG.10 |
Filling |
0 |
| 236/52 |
Float-operated |
6 |
| 236/15R |
Furnace controlled |
27 |
| 236/15BR |
Commercial furnace controls |
15 |
| 236/15BD |
Air and fuel control |
72 |
| 236/15BB |
Product and furnace temperature sensor |
33 |
| 236/15BE |
Recuperator, gas turbine, melting furnace |
8 |
| 236/15BA |
Solid fuel burning |
12 |
| 236/15BF |
Specialized furnace or heater, e.g., crystal growing |
11 |
| 236/15BG |
Timer or program |
18 |
| 236/15BC |
With conveyor thru furnace |
12 |
| 236/15A |
Domestic oven controls |
39 |
| 236/15E |
Furnace controlled responsive to combustion products composition |
94 |
| 236/15C |
Furnace controlled responsive to pressure |
35 |
| 236/DIG.5 |
Fusible |
3 |
| 236/DIG.12 |
Heat conductor |
7 |
| 236/36 |
Heating radiator |
16 |
| 236/38 |
Air control |
37 |
| 236/37 |
Combined radiator and apartment controlled |
24 |
| | Exhaust operated | |
| | Fluid-operated motor | |
| 236/39 |
Aspirator |
0 |
| 236/40 |
Thermostatic |
2 |
| 236/41 |
With trap |
3 |
| | Thermostatic | |
| 236/42 |
Expanding fluid |
35 |
| 236/43 |
Expanding solid |
1 |
| 236/47 |
High and low temperature alternate |
143 |
| 236/10 |
Hot-air furnace |
53 |
| 236/11 |
Air and fire control |
128 |
| 236/DIG.13 |
Humidithermostat |
2 |
| 236/44R |
Humidity control |
100 |
| 236/44C |
Humidity and temperature control |
292 |
| 236/44A |
Humidity control per se |
143 |
| 236/44E |
With electrical conductive element |
20 |
| 236/44B |
With evaporator cooling spray |
24 |
| 236/2 |
Incubator type of heater |
19 |
| 236/3 |
Electric |
32 |
| | Thermostatic | |
| 236/4 |
Expanding fluid |
1 |
| 236/5 |
Expanding solid |
2 |
| 236/DIG.14 |
Intermittant control |
1 |
| 236/50 |
Liquid valve |
3 |
| 236/1R |
Miscellaneous |
41 |
| 236/1A |
Burner controls not elsewhere classified in class |
24 |
| 236/1H |
Burner controls with automatic cutoff |
15 |
| 236/1G |
Heat conserving damper control |
128 |
| 236/1C |
Heating and cooling controls |
217 |
| 236/1E |
Multistage controls |
71 |
| 236/1EA |
Multiple valve staging |
76 |
| 236/1EB |
Single valve staging |
27 |
| 236/1F |
Piezoelectric crystal and other electric unit temperature controls |
8 |
| 236/1D |
Stoker controls |
1 |
| 236/1B |
Zone control for heating and cooling medium |
168 |
| 236/12.1 |
Mixing fluid of dissimilar temperature |
65 |
| 236/12.14 |
Fluid from only one supply is controlled |
24 |
| 236/12.16 |
Having oscillating or reciprocating valve |
33 |
| 236/12.21 |
Axially spaced flow control faces |
21 |
| 236/12.22 |
Seats face outwardly |
12 |
| 236/12.23 |
Ports closed by valve action |
19 |
| 236/12.2 |
Tubular valve member |
100 |
| 236/12.17 |
Valving member moves about an axis |
16 |
| 236/12.19 |
Axially spaced flow control faces |
11 |
| 236/12.18 |
Tubular valve member |
14 |
| 236/12.13 |
Including bypass |
38 |
| 236/12.15 |
Including separate relatively movable valve for each fluid supply |
41 |
| 236/12.11 |
Mixing valve with temperature motive means |
76 |
| 236/12.12 |
Having electrical motive means |
145 |
| 236/13 |
Plenum type |
181 |
| 236/67 |
Motors |
10 |
| 236/71 |
Balanced |
1 |
| 236/72 |
Thermostatic relay |
4 |
| 236/73 |
Continuous drive |
1 |
| 236/74R |
Electric |
10 |
| 236/74A |
Electric motor driven pump |
4 |
| 236/75 |
Reciprocating or oscillating |
24 |
| 236/78R |
Relay |
45 |
| 236/78A |
Plural control elements |
17 |
| 236/78B |
Plural temperature sensors |
66 |
| 236/78D |
Proportional control |
195 |
| 236/78C |
Reversible motor |
30 |
| 236/76 |
Step-by-step |
4 |
| 236/77 |
Vibrating arm |
1 |
| | Fluid-operated | |
| 236/79 |
Relay |
5 |
| 236/82 |
Compound |
10 |
| 236/83 |
Snap-acting |
0 |
| 236/84 |
Electric |
44 |
| 236/85 |
Pressure-operated |
2 |
| 236/80R |
Shunt |
37 |
| 236/80A |
Airplane |
7 |
| 236/80F |
Diaphragm biased open by line pressure |
2 |
| 236/80G |
Piston-type valve operator |
4 |
| 236/80B |
Plural main valves |
8 |
| 236/80E |
Plural pilots by single actuator |
4 |
| 236/80C |
Plural temperature sensors |
3 |
| 236/80D |
Pure fluid |
8 |
| 236/81 |
Snap-acting |
2 |
| | Thermostatic | |
| 236/86 |
Expanding fluid |
38 |
| 236/87 |
Expanding solid |
97 |
| 236/88 |
Magnetic release |
10 |
| 236/89 |
Safety cut-out |
4 |
| | Relay | |
| 236/68R |
Auxiliary heater |
59 |
| 236/68C |
Auxiliary heater applied to control device away from main temperature sensor |
9 |
| 236/68B |
Auxiliary heater applied to main temperature sensing means |
68 |
| 236/68A |
Heated expansible chamber vaporizer liquid injected by thermostat |
4 |
| 236/68D |
Thermo-controlled pilot burner operates a heat motor to actuate main fuel valve |
11 |
| 236/69 |
Pyrometer galvanometer |
4 |
| 236/70 |
With beating element |
1 |
| 236/90 |
Thermal release |
6 |
| 236/DIG.15 |
Photocell |
5 |
| 236/DIG.16 |
Relief spring |
1 |
| 236/DIG.18 |
Rubber |
0 |
| 236/7 |
Sadiron type |
2 |
| 236/DIG.3 |
Safety electric |
6 |
| 236/DIG.4 |
Safety vacuum |
0 |
| 236/48R |
Snap-acting |
72 |
| 236/48A |
Including a permanent magnet |
4 |
| 236/DIG.17 |
Spring rate compensator |
1 |
| | Thermostatic | |
| 236/97 |
Cooled element |
1 |
| 236/99R |
Expanding fluid |
68 |
| 236/99C |
External and internal sensors |
4 |
| 236/100 |
Float or piston operation |
128 |
| 236/99D |
Heat shield |
12 |
| 236/99J |
In flow line |
43 |
| 236/99G |
Lever |
12 |
| 236/99H |
Liquid fuel feed |
1 |
| 236/99A |
Nontemperature sensor |
3 |
| 236/99B |
Nonvalving device |
5 |
| 236/99F |
Pivoted valve |
6 |
| 236/99E |
Plural temperature sensors |
19 |
| 236/99K |
Wax thermostat |
48 |
| 236/101R |
Expanding solid |
67 |
| 236/101D |
Coil thermostat |
81 |
| 236/101E |
Compound lever |
63 |
| 236/102 |
Concentric elements |
28 |
| 236/103 |
Conduit |
6 |
| 236/104 |
Fire pot |
1 |
| 236/101A |
Plural inlets or outlets |
14 |
| 236/101B |
Plural thermostats |
23 |
| 236/101C |
Thermostat with i.c.e. |
82 |
| | Flue or heater attached | |
| 236/95 |
Expanding fluid |
3 |
| 236/96 |
Expanding solid |
15 |
| 236/98 |
Fluid transmission |
7 |
| 236/91R |
Hot and cold |
59 |
| 236/91G |
Current modifying sensor |
29 |
| 236/91D |
Heating and cooling |
84 |
| 236/91A |
Nonhabitable enclosure, e.g., incubator |
21 |
| 236/91E |
Plural room or plural outside thermostat |
43 |
| 236/91F |
With at least one temperature sensor for temperature modifying media |
176 |
| 236/91C |
With diverse sensor, e.g., humidity, pressure |
172 |
| 236/91B |
With oil burner |
5 |
| 236/93R |
In fluid controlled |
251 |
| 236/93A |
Expanding fluid |
141 |
| 236/93B |
Shower heads |
35 |
| 236/94 |
With indicator or alarm |
424 |
| 236/92R |
With pressure control |
54 |
| 236/92A |
Combined with fuel gas pressure regulator |
6 |
| 236/92C |
Pressure- and temperature-actuated relief valves |
31 |
| 236/92D |
Pressure- and temperature-actuated valves associated with carburetors |
2 |
| 236/92B |
Refrigeration expansion valves |
206 |
| | Traps | |
| | Float valve | |
| 236/53 |
Thermostatic air valve |
4 |
| | Pressure-operated valve | |
| 236/54 |
Thermostatic pilot |
4 |
| | Thermostatic | |
| 236/56 |
Expanding fluid |
21 |
| 236/57 |
Bourdon type |
3 |
| 236/58 |
Wafer type |
22 |
| 236/59 |
Expanding solid |
26 |
| 236/60 |
Conduit |
0 |
| 236/55 |
With float-controlled pilot |
1 |
| 236/DIG.19 |
Ventilated thermostat |
33 |
| 236/49.1 |
Ventilator type |
87 |
| 236/49.3 |
Electrically actuated |
846 |
| 236/49.5 |
Mechanical linkage actuated |
129 |
| 236/49.4 |
Pneumatically actuated |
110 |
| 236/49.2 |
Responsive to fire or smoke |
22 |
| 236/46R |
With timing element |
438 |
| 236/46C |
Controlled diverse means |
37 |
| 236/46A |
Diverse sensor |
16 |
| 236/46D |
Domestic oven |
8 |
| 236/46E |
Hot air furnace |
26 |
| 236/46B |
Stoker control |
1 |
| 236/46F |
Timer other than clock |
88 |
