US3774234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servicing apparatus for heating/cooling systems
Assignee: Individual
•
Filing: 1972-06-15
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Granted: 1973-11-20
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Expires: 1992-06-15
Abstract
Abstract A portable servicing apparatus for operating heating/cooling systems through various stages of operation while allowing the user to simultaneously observe the operation of the components of the system includes a plurality of electrical leads adapted to be coupled to a terminal board of the unit being serviced or tested. A power supply in the apparatus provides 110/220 volt alternating current or 24 volt alternating current power to the various leads in a predetermined and selectable manner that can be controlled by a plurality of switches to actuate the system components. Each switch includes an indicator light associated therewith to indicate to the user the stage of the system under test or the component which is actuated by the serving apparatus. Means are included for determining the proper operation of the indicator lamps to insure that an accurate indication is provided by the servicing apparatus.
Inventors
- 👤 R Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:24
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
214 words
A portable servicing apparatus for providing electrical power to various components of a heating/cooling system comprising: power supply means for supplying a first voltage at first output terminals thereof and a second voltage at second voltage output terminals thereof; means for applying operating power to said power supply means; a first series of switches each having first and second terminals, wherein said first terminals are coupled to one of said first terminals of said power supply means; a second series of switches each having first and second terminals, wherein said first terminals are coupled to one of said second terminals of said second output terminals of said power supply means; a plurality of electrical output leads; means for individually coupling said output leads to said second terminals of said first and second series of switches such that an output lead is associated with each switch; a plurality of indicator lights, each coupled to said second terminal of a predetermined one of said first or second switches to be associated therewith, said lights further coupled to said power supply means to be actuated when the associated switch is actuated to apply voltage from said power supply means to an associated lead whereby the voltage applied to said associated output lead activates said associated indicator light.
Claim 2
Dependent Claim
214 words
A portable servicing apparatus for providing electrical power to various components of a heating/cooling system comprising: power supply means for supplying a first voltage at first output terminals thereof and a second voltage at second voltage output terminals thereof; means for applying operating power to said power supply means; a first series of switches each having first and second terminals, wherein said first terminals are coupled to one of said first terminals of said power supply means; a second series of switches each having first and second terminals, wherein said first terminals are coupled to one of said second terminals of said second output terminals of said power supply means; a plurality of electrical output leads; means for individually coupling said output leads to said second terminals of said first and second series of switches such that an output lead is associated with each switch; a plurality of indicator lights, each coupled to said second terminal of a predetermined one of said first or second switches to be associated therewith, said lights further coupled to said power supply means to be actuated when the associated switch is actuated to apply voltage from said power supply means to an associated lead whereby the voltage applied to said associated output lead activates said associated indicator light.
Claim 3
Dependent Claim
65 words
The apparatus as defined in claim 1 wherein said apparatus includes a control panel to which said first and second series of switches are mounted wherein said panel includes indicia identifying a unique function for each switch wherein at least one switch of said first series of switches is coupled to an output lead for actuating a heating component of the heating/cooling unit under test.
Claim 4
Dependent Claim
33 words
The apparatus as defined in claim 2 wherein said first series of switches includes at least one switch coupled to an output lead for actuating a cooling component of the unit under test.
Claim 5
Dependent Claim
85 words
The apparatus as defined in claim 1 wherein said apparatus includes a control panel to which said first and second series of switches are mounted and said panel includes indicia identifying a unique function for each switch wherein at least one switch of said second series of switches is associated with a lead for actuating a heating component of the heating/cooling unit under test, and at least another switch is associated with a lead for actuating a cooling component of the heating/cooling unit under test.
Claim 6
Dependent Claim
54 words
The apparatus as defined in claim 4 and further including a multiple contact relay having a plurality of relay contacts, each relay contact coupled in series between said second terminal of one of said first series of switches and an associated output lead, and means for actuating said relay to open said relay contacts.
Claim 7
Dependent Claim
34 words
The apparatus as defined in claim 5 wherein said means for actuating said relay comprises a momentary push button switch coupled between a relay coil associated with said relay and said power supply means.
Claim 8
Dependent Claim
32 words
The apparatus as defined in claim 6 wherein each output lead has a predetermined color and each indicator light has a lens colored to match the color of the lead associated therewith.
Claim 9
Dependent Claim
189 words
A portable servicing apparatus for selectively controlling electrically operated components in a heating/cooling system comprising: means for receiving operating power for said apparatus, a step-down transFormer having primary and secondary windings for providing a lowered alternating current output voltage across said secondary winding in response to line voltage applied to said primary winding from said receiving means, a first series of switches having first and second terminals electrically coupled to one another when said switches are in a closed position, means for coupling said secondary winding to said first terminal of said first series of switches, a plug including a plurality of color coded output conductors, at least one output jack mounted to the apparatus and adapted to receive said plug, means coupling terminals of said at least one output jack to said second terminals of predetermined ones of said switches, and a first series of indicator lights coupled to said second terminals of each of said switches to be actuated when said switch is actuated to apply power to an associated output conductor, said lights including color coded lenses corresponding to said color coded output conductors coupled thereto.
Claim 10
Dependent Claim
189 words
A portable servicing apparatus for selectively controlling electrically operated components in a heating/cooling system comprising: means for receiving operating power for said apparatus, a step-down transFormer having primary and secondary windings for providing a lowered alternating current output voltage across said secondary winding in response to line voltage applied to said primary winding from said receiving means, a first series of switches having first and second terminals electrically coupled to one another when said switches are in a closed position, means for coupling said secondary winding to said first terminal of said first series of switches, a plug including a plurality of color coded output conductors, at least one output jack mounted to the apparatus and adapted to receive said plug, means coupling terminals of said at least one output jack to said second terminals of predetermined ones of said switches, and a first series of indicator lights coupled to said second terminals of each of said switches to be actuated when said switch is actuated to apply power to an associated output conductor, said lights including color coded lenses corresponding to said color coded output conductors coupled thereto.
Claim 11
Dependent Claim
147 words
The apparatus as defined in claim 8 and further including a second series of switches, each having first and second terminals electrically coupled to one another when the switch is in a closed position wherein a first terminal of each of said second switches are coupled to said primary winding of said transformer, a second output jack adapted to receive a second plug having a plurality of second color coded conductors coupled thereto, said output jack having a plurality of terminals coupled to corresponding second terminals of said second series of switches, and a second series of indicator lights coupled to said second terminals of each of said second series of switches to be actuated when said corresponding switch is actuated to apply power to an associated output conductor, said second series of lights including color coded lenses corresponding to said second color coded conductors coupled thereto.
Claim 12
Dependent Claim
73 words
The apparatus as defined in claim 9 wherein said means coupling said terminals of said first switches to said at least one output jack includes a plurality of normally closed relay contacts, each contact being coupled in series between a switch and a corresponding terminal of said at least one output jack, and means for actuating said relay to open said contacts to disconnect said terminals of said output jack from said switches.
Claim 13
Dependent Claim
39 words
The apparatus as defined in claim 10 wherein said transformer, said first and second series of switches and lights, and said output jacks are positioned in a container having a storage area for output conductors and a hinged cover.
References Cited (Backward Citations)
US2625591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |