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US3683301A
Expired / Lapsed
US
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Electromagnetically operated solid state timing device
Assignee: Schneider Electric USA Inc
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Filing: 1971-06-17
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Granted: 1972-08-08
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Expires: 1991-06-17
Abstract
Abstract An electromagnetically operated solid state timing device having switching contacts and features which will permit the device to act as a direct replacement for an electromagnetically operated pneumatic timer. The device includes an electromagnet, a permanent magnet latch, a snap switch, solid state circuitry and accessible controls so the device may be easily programmed to actuate the snap switch an adjustable time delay after the electromagnet is energized or deenergized.
Inventors
- 👤 Robert D Boley
- 👤 Charles F Meyer
- 👤 Rudolf H Kiessling
- 👤 Kenneth L Paape
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:18
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H01; H01H; H01H5/00; H01H5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
248 words
A timing device comprising: an electromagnet including a stationary magnet part, a magnet armature assembly and a magnet coil magnetically coupled to the stationary magnet part and the armature assembly for causing the armature assembly to move from a first to a second position when the magnet coil is energized, an electric switch having an operator movable from a first position to a second position, a releasable permanent magnet latch having a member movable from a first position to a second position, a permanent magnet providing an output flux for maintaining the member in its first position and a magnet release coil providing an output flux to effectively cancel the flux output of the permanent magnet for releasing the latch member for movement to its second position when the magnet release coil is energized, an operating lever assembly having a first portion movable by the armature assembly, a second portion engageable with the switch operator, and a third portion engaged by the latch member for maintaining the switch member in its second position when the latch member is at its first position and for releasing the switch operator for movement to its first position upon release of the latch member, and a solid state timing circuit having inputs connected to receive an input signal change concurrently with the energization or deenergization of the electromagnet coil and outputs connected to the magnet release coil for energizing the magnet release coil a predetermined time interval after an input signal change.
Claim 2
Dependent Claim
248 words
A timing device comprising: an electromagnet including a stationary magnet part, a magnet armature assembly and a magnet coil magnetically coupled to the stationary magnet part and the armature assembly for causing the armature assembly to move from a first to a second position when the magnet coil is energized, an electric switch having an operator movable from a first position to a second position, a releasable permanent magnet latch having a member movable from a first position to a second position, a permanent magnet providing an output flux for maintaining the member in its first position and a magnet release coil providing an output flux to effectively cancel the flux output of the permanent magnet for releasing the latch member for movement to its second position when the magnet release coil is energized, an operating lever assembly having a first portion movable by the armature assembly, a second portion engageable with the switch operator, and a third portion engaged by the latch member for maintaining the switch member in its second position when the latch member is at its first position and for releasing the switch operator for movement to its first position upon release of the latch member, and a solid state timing circuit having inputs connected to receive an input signal change concurrently with the energization or deenergization of the electromagnet coil and outputs connected to the magnet release coil for energizing the magnet release coil a predetermined time interval after an input signal change.
Claim 3
Dependent Claim
116 words
The timing device as recited in claim 1 wherein the armature assembly includes a pair of spaced oppositely facing cam surfaces and the lever assembly is selectively movable to two programmed positions wherein the first portion engages one of the pair of cam surfaces when the lever is at a first programmed position for maintaining the switch operator in its second position when the armature assembly is at its first position and wherein the first portion engages a second one of the pair of cam surfaces when the lever is at a second of its two programmed positions for maintaining the switch operator in its second position when the armature assembly is at its second position.
Claim 4
Dependent Claim
17 words
The timing device as recited in claim 1 wherein the switch is of the snap acting type.
Claim 5
Dependent Claim
22 words
The timing device as recited in claim 1 wherein the portion of the operating lever that engages the switch operator is adjustable.
Claim 6
Dependent Claim
38 words
The timing device as recited in claim 1 including an operating button having a portion engageable with the latch member for moving the member to its second position when a manual force is applied to the operating button.
Claim 7
Dependent Claim
24 words
The timing device as recited in claim 1 wherein a lost motion connection provides the engagement between the third portion and the latch member.
Claim 8
Dependent Claim
41 words
The timing device as recited in claim 1 wherein the electromagnet coil has a pair of input terminals and a pair of terminals connected to provide the input signal change to the solid state circuit when the electromagnet coil is energized.
Claim 9
Dependent Claim
40 words
The timing device as recited in claim 1 wherein the solid state circuit includes a capacitor which provides the electrical energy to the release coil to release the magnet latch a predetermined time interval after the electromagnet coil is de-energized.
Claim 10
Dependent Claim
88 words
The timing device as recited in claim 2 wherein a two position switch provides a programmed input to the solid state circuit for programming the solid state circuit in a first mode of operation when the lever is programmed in its first position and the two position switch is at a first of its two positions and for programming the solid state circuit in a second mode of operation when the lever is at its second position and the switch is at a second of its two positions.
Claim 11
Dependent Claim
92 words
The timing device as recited in claim 9 including a potentiometer resistor having a manually adjustable portion for varying the time interval and wherein the adjustable portion of the potentiometer, the two position switch, a portion on the lever assembly for selectively moving the lever assembly to the two programmed positions and an operating button that has a portion engageable with the latch member for manually moving the latch member to its second position each include portions that are externally accessible and manually operable from a front side of the timing device.
Claim 12
Dependent Claim
51 words
The timing device as recited in claim 10 including a means for varying the timing interval in discrete steps, said means having a portion externally accessible and manually movable from the front side of the device for adjusting the timing interval in discrete steps from the front side of the device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |