Patent US3556612A successfully refreshed from Google Patents.
Patent US4583081A successfully refreshed from Google Patents.
Patent US3875358A successfully refreshed from Google Patents.
US3875358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm snap pressure switch
Assignee: Siemens Energy and Automation Inc
•
Filing: 1974-02-19
•
Granted: 1975-04-01
•
Expires: 1994-02-19
Abstract
Abstract A pressure controlled switch includes a support molded with various passages and guides to facilitate assembly of the switch. Means are provided to operate a pressure relief valve. One embodiment permits manual or automatic operation while another provides for automatic or off conditions.
Inventors
- 👤 Dale F Willcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:44
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
321 words
A pressure controlled switch comprising a molded support having an upper surface and a lower surface with spaced side walls extending therebetween to form an interior space, a pair of terminals mounted on said upper surface, a pair of stationary contacts having each one a first portion electrically and mechanically connected to each terminal, a pair of spaced passages opening in said upper surface and extending to said interior space, each stationary contact having a second portion extending through one of said spaced passages into said interior space and having a third portion extending into said interior space at an angle to said second portion, guide slots formed in said side walls of said support between said stationary contacts and opening into said interior space thereof, a contact carrier having edges slidable in said guide slots whereby said contact carrier may move within said interior space, a movable contact mounted on said contact carrier and extending perpendicular thereto to overlay said stationary contacts to engage and disengage from the same upon movement of said contaCt carrier, a flipper pivotally mounted in said side walls and engageable with said contact carrier, a first lever pivotally mounted under said flipper and having an arm extending upwardly therefrom, a main spring mounted in said support and bearing on the free end of said lever to urge said free end in a first direction, a snap spring connected between said arm and said flipper normally biasing said flipper toward said first lever, a diaphragm having one surface in engagement with said lever, and a diaphragm housing covering the other surface of said diaphragm and having an opening where fluid from a source may be connected to said diaphragm having to cause said diaphragm to urge said lever in a second direction against the force of said main spring thereby causing said flipper to rotate about its pivot moving said contact carrier and said movable contacts.
Claim 2
Dependent Claim
321 words
A pressure controlled switch comprising a molded support having an upper surface and a lower surface with spaced side walls extending therebetween to form an interior space, a pair of terminals mounted on said upper surface, a pair of stationary contacts having each one a first portion electrically and mechanically connected to each terminal, a pair of spaced passages opening in said upper surface and extending to said interior space, each stationary contact having a second portion extending through one of said spaced passages into said interior space and having a third portion extending into said interior space at an angle to said second portion, guide slots formed in said side walls of said support between said stationary contacts and opening into said interior space thereof, a contact carrier having edges slidable in said guide slots whereby said contact carrier may move within said interior space, a movable contact mounted on said contact carrier and extending perpendicular thereto to overlay said stationary contacts to engage and disengage from the same upon movement of said contaCt carrier, a flipper pivotally mounted in said side walls and engageable with said contact carrier, a first lever pivotally mounted under said flipper and having an arm extending upwardly therefrom, a main spring mounted in said support and bearing on the free end of said lever to urge said free end in a first direction, a snap spring connected between said arm and said flipper normally biasing said flipper toward said first lever, a diaphragm having one surface in engagement with said lever, and a diaphragm housing covering the other surface of said diaphragm and having an opening where fluid from a source may be connected to said diaphragm having to cause said diaphragm to urge said lever in a second direction against the force of said main spring thereby causing said flipper to rotate about its pivot moving said contact carrier and said movable contacts.
Claim 3
Dependent Claim
44 words
A pressure controlled switch as set forth in claim 1 in combination with a pressure relief valve having an actuating plunger, said flipper having a portion extending toward said actuating plunger to engage said plunger when said flipper is rotated to open said valve.
Claim 4
Dependent Claim
76 words
A pressure controlled switch as set forth in claim 1, including a second lever rotatably mounted in one of said side walls and having a portion extending under said first lever to cause said first lever to pivot against the force of said main spring as said second lever is rotated to disengage said first lever from said diaphragm and thereby prevent operation of switch in response to variations of fluid pressure in said diaphragm housing.
Claim 5
Dependent Claim
65 words
A pressure controlled switch as set forth in claim 1, wherein said support has an opening therein extending from said upper surface, said main spring being mounted in said support opening and extending therefrom to bear against said first lever, and first screw adjusting means in said opening engaging said main spring to vary the spring pressure on said free end of said first lever.
Claim 6
Dependent Claim
111 words
A pressure controlled switch as set forth in claim 4, including a further opening in said support, a plunger mounted in said further opening and overlaying said first lever and normally out of contact therewith, a differential spring in said further opening urging said plunger toward said first lever, and second screw adjusting means in said further opening engaging said differential spring for varying the force on said plunger, said first lever engaging said plunger upon its rotation in response to an increase in fluid pressure so that upon a decrease in fluid pressure said plunger and said main spring together act to restore said first lever to its normal position.
Claim 7
Dependent Claim
29 words
A pressure controlled switch as set forth in claim 1, including a tab extending from said flipper whereby said flipper may be rotated by hand to actuate said switch.
Claim 8
Dependent Claim
122 words
A pressure controlled switch as set forth in claim 1, including a pair of second terminals mounted on said upper surface, a stationary contact having a first portion electrically and mechanically connected to each of said second terminals, a second pair of spaced passages opening in said upper surface and extending to said interior space, each stationary contact having a second portion extending through one of said second spaced passages into said interior space and having a third portion extending into said interior space at an angle to said second portion, a second movable contact mounted on said contact carrier and extending perpendicular thereto to overlay said second stationary contacts to engage any disengage the same upon movement of said contact carrier.
Claim 9
Dependent Claim
122 words
A pressure controlled switch as set forth in claim 7, wherein said contact carrier has a pair of spaced openings therein and said movable contacts extend through said openings, a spring mounted in each opening and bearing on said contact carrier to urge its associated movable contact toward the bottom of the opening, the bottom of each contact carrier opening being inclined at an angle to the planes containing the third portions of said stationary contacts and lying in a plane below an associated stationary contact when said contact carrier is at one limit of its movement so that said movable contacts are lifted off the bottoms of said contact carrier openings and are urged against said stationary contacts by said springs.
Claim 10
Dependent Claim
55 words
A pressure controlled switch as set forth in claim 1, wherein said first lever is provided with a pad extending toward said diaphragm, the surface of said pad confronting said diaphragm being normally at an angle to surface of said diaphragm and become parallel thereto as said first lever is rotated from its normal position.
Claim 11
Dependent Claim
44 words
A pressure controlled switch as set forth in claim 9 in combination with a pressure relief valve having an actuating plunger, said flipper having a portion extending toward said actuating plunger to engage said plunger when said flipper is rotated to open said valve.
Claim 12
Dependent Claim
73 words
A pressure controlled switch as set forth in claim 10, including a second lever rotatably mounted in one of said side walls and having a portion extending under said first lever to cause said first lever to pivot against the force of said main spring as said second lever is rotated to disengage said first lever from said diaphragm and thereby prevent operation of the switch in response to variations in fluid pressure.
Claim 13
Dependent Claim
65 words
A pressure switch as set forth in claim 11, wherein said support has an opening therein extending from said upper surface, said main spring being mounted in said support opening and extending therefrom to bear against said first lever and first screw adjusting means in said opening to engage said main spring to vary the spring pressure on the free end of said first lever.
Claim 14
Dependent Claim
111 words
A pressure controlled switch as set forth in claim 12, including a further opening in said support, a plunger mounted in said further opening and overlaying said first lever and normally out of contact therewith, a differential spring in said further opening urging said plunger toward said first lever, and second screw adjusting means in said further opening engaging said differential spring for varying the force on said plunger, said first lever engaging said plunger upon its rotation in response to an increase in fluid pressure so that upon a decrease in fluid pressure said plunger and said main spring together act to restore said first lever to its normal position.
Claim 15
Dependent Claim
122 words
A pressure controlled switch as set forth in claim 13, including a pair of second terminals mounted on said upper surface, a stationary contact having a first portion electrically and mechanically connected to each of said second terminals, a second pair of spaced passages opening in said upper surface and extending to said interior space, each stationary contact having a second portion extending through one of said second space passages into said interior space and having a third portion extending into said interior space at an angle to said second portion, a second movable contact mounted on said contact carrier and extending perpendicular thereto to overlay said second stationary contacts to engage and disengage the same upon movement of said contact carrier.
Claim 16
Dependent Claim
120 words
A pressure controlled switch as set forth in claim 14, wherein said contact carrier has a pair of spaced openings therein and said movable contacts extend through said openings, a spring mounted in each opening and bearing on said contact carrier to move its associated movable contact toward the bottom of the opening, the bottom of each contact carrier being inclined at an angle to the planes containing the third portions of said stationary contacts and lying in a plane below an associated stationary contact when said contact carrier is at one limit of its movement so that movable contacts are lifted off the bottoms of said contact carrier openings and are urged against said stationary contacts by said springs.
Claim 17
Dependent Claim
56 words
A pressure controlled switch as set forth in claim 15, wherein said first lever is provided with a pad extending toWard said diaphragm, the surface of said pad confronting said diaphragm being normally at an angle to the surface of said diaphragm and becoming parallel thereto are said first lever is rotated from its normal position.
Claim 18
Dependent Claim
29 words
A pressure controlled switch as set forth in claim 10, including a tab extending from said flipper whereby said flipper may be rotated by hand to actuate said switch.
Claim 19
Dependent Claim
121 words
A pressure controlled switch as set forth in claim 17, including a pair of second terminals mounted on said upper surface, a stationary contact having a first portion electrically and mechanically connected to each of said second terminals, a pair of space passages opening in said upper surface and extending to said interior space, each stationary contact having a second portion extending through one of said second spaced passages into said interior space and having a third portion extending into said interior space at an angle to said second portion, a second movable contact mounted on said contact carrier and extending perpendicular thereto to overlay said second stationary contact to engage and disengage the same upon movement of said contact carrier.
Claim 20
Dependent Claim
122 words
A pressure controlled switch as set forth in claim 18, wherein said contact carrier has a pair of space openings therein and said movable contacts extend through said openings, a spring mounted in each opening and bearing on said contact carrier to urge its associated movable contact toward the bottom of the opening, the bottom of each carrier contact opening being inclined at an angle to the planes containing the third portions of said stationary contacts and lying in a plane below an associated stationary contact when said contact carrier is at one limit of its movement so that said movable contacts are lifted off the bottoms of said contact carrier openings and are urged against said stationary contacts by said springs.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |