Patent US3720844A successfully refreshed from Google Patents.
US3720844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for trash compactor
Assignee: Goodman Co LP
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Filing: 1971-07-06
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Granted: 1973-03-13
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Expires: 1991-07-06
Abstract
Abstract Initial movement of the ram of a trash compactor actuates a switch which prepares a circuit for reverse flow of current through the start windings of an electric drive motor after a centrifugal switch incorporated therein has opened. When compaction of the trash has slowed the motor to a predetermined speed, the centrifugal switch recloses and the ram is automatically reversed. Other switches and means for controlling the ram''s movement, as well as for safety purposes, are also disclosed, together with details of the structure of the trash compactor generally, the ram and the mounting of the container in which the trash is compacted.
Inventors
- 👤 L Sahs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B30B9/00; B30B9/30; B30B9/3003; B30B9/3007; B30B9/306; B30B9/3064; H; H02; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
371 words
An electrical control circuit for a trash compactor having a ram movable from an initial position to successive positions to compact trash in a container carried on a slide-out mount having inner and outer positions wherein said container is respectively in trash compacting and trash receiving positions relative to said ram, said ram being driven by an electric motor having start and run windings, said circuit comprising: a centrifugal switch in series with said start windings, said switch being moved to its circuit open position by centrifugal force when said motor exceeds a predetermined speed and moved to circuit closed position when said motor is below said speed; a reversing switch having a pair of circuit making members in series with the respective sides of said start windings and first, second, third and fourth switch contacts, each of said first and fourth contacts being connected in series with one side of said run windings and each of said second and third contacts being connected in series with the other side of said run windings, both of said circuit making members having a first position in circuit making relation to said first and third contacts and a second position in circuit making relation to said second and fourth contacts, said reversing switch being operatively associated with said ram so that both of said circuit making members are in their first position when said ram is in its initial position, said centrifugal switch is in circuit closed position and said motor is de-energized, and in their second position when said ram is in successive positions thereof and said motor exceeds said predetermined speed; a power supply line having one side connected through a limit switch in series with said second and third contacts and the other side of said run windings, another said of said line being connected in series with said one side of said run windings, said limit switch being in circuit open position when said ram is in said first position thereof and in circuit closed position when said ram is in said successive positions thereof; and a stop switch in series with one side of said power supply line, said stop switch being manually movable to circuit open position.
Claim 2
Dependent Claim
371 words
An electrical control circuit for a trash compactor having a ram movable from an initial position to successive positions to compact trash in a container carried on a slide-out mount having inner and outer positions wherein said container is respectively in trash compacting and trash receiving positions relative to said ram, said ram being driven by an electric motor having start and run windings, said circuit comprising: a centrifugal switch in series with said start windings, said switch being moved to its circuit open position by centrifugal force when said motor exceeds a predetermined speed and moved to circuit closed position when said motor is below said speed; a reversing switch having a pair of circuit making members in series with the respective sides of said start windings and first, second, third and fourth switch contacts, each of said first and fourth contacts being connected in series with one side of said run windings and each of said second and third contacts being connected in series with the other side of said run windings, both of said circuit making members having a first position in circuit making relation to said first and third contacts and a second position in circuit making relation to said second and fourth contacts, said reversing switch being operatively associated with said ram so that both of said circuit making members are in their first position when said ram is in its initial position, said centrifugal switch is in circuit closed position and said motor is de-energized, and in their second position when said ram is in successive positions thereof and said motor exceeds said predetermined speed; a power supply line having one side connected through a limit switch in series with said second and third contacts and the other side of said run windings, another said of said line being connected in series with said one side of said run windings, said limit switch being in circuit open position when said ram is in said first position thereof and in circuit closed position when said ram is in said successive positions thereof; and a stop switch in series with one side of said power supply line, said stop switch being manually movable to circuit open position.
Claim 3
Dependent Claim
371 words
An electrical control circuit for a trash compactor having a ram movable from an initial position to successive positions to compact trash in a container carried on a slide-out mount having inner and outer positions wherein said container is respectively in trash compacting and trash receiving positions relative to said ram, said ram being driven by an electric motor having start and run windings, said circuit comprising: a centrifugal switch in series with said start windings, said switch being moved to its circuit open position by centrifugal force when said motor exceeds a predetermined speed and moved to circuit closed position when said motor is below said speed; a reversing switch having a pair of circuit making members in series with the respective sides of said start windings and first, second, third and fourth switch contacts, each of said first and fourth contacts being connected in series with one side of said run windings and each of said second and third contacts being connected in series with the other side of said run windings, both of said circuit making members having a first position in circuit making relation to said first and third contacts and a second position in circuit making relation to said second and fourth contacts, said reversing switch being operatively associated with said ram so that both of said circuit making members are in their first position when said ram is in its initial position, said centrifugal switch is in circuit closed position and said motor is de-energized, and in their second position when said ram is in successive positions thereof and said motor exceeds said predetermined speed; a power supply line having one side connected through a limit switch in series with said second and third contacts and the other side of said run windings, another said of said line being connected in series with said one side of said run windings, said limit switch being in circuit open position when said ram is in said first position thereof and in circuit closed position when said ram is in said successive positions thereof; and a stop switch in series with one side of said power supply line, said stop switch being manually movable to circuit open position.
Claim 4
Dependent Claim
371 words
An electrical control circuit for a trash compactor having a ram movable from an initial position to successive positions to compact trash in a container carried on a slide-out mount having inner and outer positions wherein said container is respectively in trash compacting and trash receiving positions relative to said ram, said ram being driven by an electric motor having start and run windings, said circuit comprising: a centrifugal switch in series with said start windings, said switch being moved to its circuit open position by centrifugal force when said motor exceeds a predetermined speed and moved to circuit closed position when said motor is below said speed; a reversing switch having a pair of circuit making members in series with the respective sides of said start windings and first, second, third and fourth switch contacts, each of said first and fourth contacts being connected in series with one side of said run windings and each of said second and third contacts being connected in series with the other side of said run windings, both of said circuit making members having a first position in circuit making relation to said first and third contacts and a second position in circuit making relation to said second and fourth contacts, said reversing switch being operatively associated with said ram so that both of said circuit making members are in their first position when said ram is in its initial position, said centrifugal switch is in circuit closed position and said motor is de-energized, and in their second position when said ram is in successive positions thereof and said motor exceeds said predetermined speed; a power supply line having one side connected through a limit switch in series with said second and third contacts and the other side of said run windings, another said of said line being connected in series with said one side of said run windings, said limit switch being in circuit open position when said ram is in said first position thereof and in circuit closed position when said ram is in said successive positions thereof; and a stop switch in series with one side of said power supply line, said stop switch being manually movable to circuit open position.
Claim 5
Dependent Claim
60 words
The circuit of claim 1 including a safety switch in series with one side of said supply line, said safety switch being operatively associated with said mount so that said safety switch is in its circuit making position when said mount is in its inner position and in its circuit open position when said mount is in its outer position.
References Cited (Backward Citations)
US2145616A
Cited
US3401892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |