Patent US3605054A successfully refreshed from Google Patents.
US3605054A
Expired / Lapsed
US
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Encapsulated alternating current solenoid
Assignee: Detroit Coil Co
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Filing: 1970-04-07
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Granted: 1971-09-14
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Expires: 1990-04-07
Abstract
Abstract This disclosure relates to alternating current solenoids of the commercial industrial type, including a C-stack, a solenoid coil disposed within the C-stack and a plunger having a shank portion received within the coil passage, and wherein the conventional sideplates, baseplate, cover, backstop, assembly bolts or rivets and even the flanged coil bobbin may be eliminated. The C-stack and coil are encapsulated in a thermosetting resin block extending from the bight portion to the pole faces of the C-stack and between the C-stack and the coil, and the pole faces of the C-stack are exposed to allow abutment by the plunger. A cap encloses the operating spaced for the plunger head at the pole faces of the C-stack and is secured to the thermosetting resin block providing a completely enclosed solenoid unit. Vacuum encapsulation may be facilitated by utilizing an encapsulating cup which forms an integral part of the final product. The coil assembly is shown as having means for retaining, during the encapsulated process, electric terminals which are exposed in the final product for connecting the coil to a source of current.
Inventors
- 👤 Louis R Conrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/088; H01F7/16; H01F7/1607; H01F7/1623
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
214 words
An alternating current solenoid comprising, in combination: a solenoid C-stack having a bight portion and opposed pole faces adjacent the distal ends, a solenoid coil disposed within the Cstack including a central plunger-receiving passage, said C-stack and said coil encapsulated in a thermosetting resin block extending from the bight portion to the pole faces of said Cstack and between the coil and C-stack, said thermosetting resin block in intimate heat transfer contact with and holding sAid coil and C-stack in integral fixed relation, said pole faces of said C-stack being exposed for contact by a plunger, said thermosetting resin block having a passage between the pole faces of the C-stack and the bight portion coaxially aligned with the passage in said coil, a plunger having opposed arm portions overlying said pole faces and shank portion received in said passage in said coil for reciprocating movement therein, and a plunger-enclosing cap on the thermosetting resin block overlying the passage in said block and providing a backstop for said plunger, said thermosetting resin block and cap constituting a completely enclosed solenoid unit for mounting on a device to be actuated, and said thermosetting resin block having sufficient structural integrity to permit direct securement of the solenoid by securing said block to the device to be actuated.
Claim 2
Dependent Claim
214 words
An alternating current solenoid comprising, in combination: a solenoid C-stack having a bight portion and opposed pole faces adjacent the distal ends, a solenoid coil disposed within the Cstack including a central plunger-receiving passage, said C-stack and said coil encapsulated in a thermosetting resin block extending from the bight portion to the pole faces of said Cstack and between the coil and C-stack, said thermosetting resin block in intimate heat transfer contact with and holding sAid coil and C-stack in integral fixed relation, said pole faces of said C-stack being exposed for contact by a plunger, said thermosetting resin block having a passage between the pole faces of the C-stack and the bight portion coaxially aligned with the passage in said coil, a plunger having opposed arm portions overlying said pole faces and shank portion received in said passage in said coil for reciprocating movement therein, and a plunger-enclosing cap on the thermosetting resin block overlying the passage in said block and providing a backstop for said plunger, said thermosetting resin block and cap constituting a completely enclosed solenoid unit for mounting on a device to be actuated, and said thermosetting resin block having sufficient structural integrity to permit direct securement of the solenoid by securing said block to the device to be actuated.
Claim 3
Dependent Claim
36 words
The solenoid defined in claim 1, characterized in that the end of the bight portion of said C-stack has locating face portions exposed to permit accurate mounting of the solenoid on the device to be actuated.
Claim 4
Dependent Claim
33 words
The solenoid defined in claim 1, characterized in that said cap is translucent and said solenoid includes illuminating means within said cap connected to said coil and indicating when the solenoid is energized.
Claim 5
Dependent Claim
51 words
The solenoid defined in claim 1, characterized in that said cap is secured to the thermosetting resin block by bolts, at least two of which extend through the end of the thermosetting resin block adjacent the bight portion of the C-stack to secure the solenoid to the device to be actuated.
Claim 6
Dependent Claim
34 words
The solenoid defined in claim 1, characterized in that said solenoid includes a pair of electrical conductor retaining members encapsulated within said thermosetting resin block, securing the electrical conductors of said solenoid during encapsulation.
Claim 7
Dependent Claim
37 words
The solenoid defined in claim 5, characterized in that said retaining members are generally C-shaped including a pair of arms disposed within the thermosetting resin block and a bight portion including an aperture receiving the electrical conductors.
Claim 8
Dependent Claim
29 words
The solenoid defined in claim 6, characterized in that said retaining members are disposed adjacent the opposed ends of the coil, generally perpendicular to the axis of the coil.
Claim 9
Dependent Claim
41 words
The solenoid defined in claim 1, characterized in that said cap includes an aperture generally coaxially aligned with the passage in said coil, and a manual actuator pin disposed in said aperture which may be manually reciprocated to engage said plunger.
Claim 10
Dependent Claim
56 words
The invention of claim 8 characterized further in that the manual actuator pin includes a head portion disposed between the plunger and an opposed surface of the cap, and a resilient element encircling the pin and disposed between the head thereof and said surface of the cap to cushion shock of the plunger striking the pin.
Claim 11
Dependent Claim
26 words
The invention defined by claim 1, characterized in that a portion of the thermosetting resin block extends along the plunger-receiving passage and defines the walls thereof.
Claim 12
Dependent Claim
43 words
The invention as defined in claim 1, characterized in that said coil is wound on a flangeless tube, and said resin block encases the ends of the coil and extends along the plunger-receiving passage through the coil defining the walls of such passage.
Claim 13
Dependent Claim
39 words
The invention defined in claim 1, characterized in that said thermosetting resin block is surrounded by and contained in a cup within which the block is cast and to which the block is intimately secured by the casting operation.
Claim 14
Dependent Claim
136 words
A self-contained alternating current solenoid comprising, in combination: a solenoid C-stack, a solenoid coil in the C-stack, a plunger having a shank portion projecting into the coil and lateral arm portions for abutting pole faces of the C-stack, an aperture in the bight portion of the C-stack for reception of a pushpin for operative engagement with the plunger, electric connectors for connecting the coil to an energizing circuit, and a housIng comprising a thermosetting resin block encapsulating and structurally integrating the C-stack, coil and electrical connectors as an operative assembly with the electrical connectors exposed for connection to an external energizing circuit and with the housing including an interiorly recessed end portion enclosing the head of the plunger and providing clearance for reciprocation thereof, and means for connecting the housing to a device to be actuated.
Claim 15
Dependent Claim
136 words
A self-contained alternating current solenoid comprising, in combination: a solenoid C-stack, a solenoid coil in the C-stack, a plunger having a shank portion projecting into the coil and lateral arm portions for abutting pole faces of the C-stack, an aperture in the bight portion of the C-stack for reception of a pushpin for operative engagement with the plunger, electric connectors for connecting the coil to an energizing circuit, and a housIng comprising a thermosetting resin block encapsulating and structurally integrating the C-stack, coil and electrical connectors as an operative assembly with the electrical connectors exposed for connection to an external energizing circuit and with the housing including an interiorly recessed end portion enclosing the head of the plunger and providing clearance for reciprocation thereof, and means for connecting the housing to a device to be actuated.
Claim 16
Dependent Claim
134 words
A solenoid comprising, in combination: a C-stack, a solenoid coil in the C-stack, a plunger having a shank portion received in the coil and an end portion projecting out of the coil between the distal ends of the C-stack, a housing enclosing the C-stack, coil and plunger and having a wall portion spaced from said end portion of the plunger when the plunger is sucked into the coil, a manual actuating pin reciprocably mounted in said wall portion of the housing and having a head disposed between such wall portion and said end portion of the plunger to be abutted thereby upon a backstroke of the plunger, and a resilient element encircling said pin between the head and said wall portion to cushion the shock of the backstroke of the plunger striking the pin.
Claim 17
Dependent Claim
134 words
A solenoid comprising, in combination: a C-stack, a solenoid coil in the C-stack, a plunger having a shank portion received in the coil and an end portion projecting out of the coil between the distal ends of the C-stack, a housing enclosing the C-stack, coil and plunger and having a wall portion spaced from said end portion of the plunger when the plunger is sucked into the coil, a manual actuating pin reciprocably mounted in said wall portion of the housing and having a head disposed between such wall portion and said end portion of the plunger to be abutted thereby upon a backstroke of the plunger, and a resilient element encircling said pin between the head and said wall portion to cushion the shock of the backstroke of the plunger striking the pin.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |