US3619048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Episcope
Assignee: ENNA WERK OPTISCHE ANSTALT DR APPELT KG
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Filing: 1969-08-13
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Granted: 1971-11-09
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Expires: 1989-08-13
Abstract
Abstract An episcope with a housing having a top mounted object support and a hinged cover over the object support. A high-intensity lowvoltage lighting system with associated reflectors transfers a clear brilliant image into a projection lens system. The object support is a heat-insulating glass plate. A high-volume fan in the housing together with inlet and outlet apertures in the housing wall and flow guides inside the housing maintain a boundary layer of cooling air flow across the underside of the object support. Controls for the high-intensity lighting system are interrelated with the object support area so projection lighting is on only when the cover is down or an object on the support engages a switch. A magnetic latch maintains the cover in its lowered position.
Inventors
- 👤 Heinz Engert
- 👤 Gunter Kayser
- 👤 Hans Lautenbacher
- 👤 Siegfried Schafer
- 👤 Johann Welnhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:11
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
An episcope comprising: a housing enclosure with a top opening; means disposed at said opening for supporting an object to be projected comprising a heat insulating glass plate; a mirror system including a reflecting mirror and projection light mirror means, said projection light mirror means having reflective and nonreflective surfaces; projection light means, including operating circuit means, disposed in said housing to provide illumination of an object on said object supporting means, said circuit means including a pressure switch with an operator to close the pressure switch to complete the circuit to the projection light means; said pressure switch operator being disposed adjacent said object supporting means and adapted to be operated by an object placed over said supporting means; an objective lens means at one side of said housing situated in the path of rays after they leave the reflecting mirror; a pivotally supported pressure plate disposed on said housing above said glass plate adapted to lay substantially parallel to said glass plate and hold an object to be projected against said glass plate; cooling air fan means mounted in said housing to provide an air stream into and through said housing; and flow path guide means for directing the cooling air stream flow upward within said housing to against and along the underside of said glass plate and out from said housing, said flow path guide means comprising at least the major portions of both said reflective and nonreflective surfaces of said projection light mirror means.
Claim 2
Dependent Claim
248 words
An episcope comprising: a housing enclosure with a top opening; means disposed at said opening for supporting an object to be projected comprising a heat insulating glass plate; a mirror system including a reflecting mirror and projection light mirror means, said projection light mirror means having reflective and nonreflective surfaces; projection light means, including operating circuit means, disposed in said housing to provide illumination of an object on said object supporting means, said circuit means including a pressure switch with an operator to close the pressure switch to complete the circuit to the projection light means; said pressure switch operator being disposed adjacent said object supporting means and adapted to be operated by an object placed over said supporting means; an objective lens means at one side of said housing situated in the path of rays after they leave the reflecting mirror; a pivotally supported pressure plate disposed on said housing above said glass plate adapted to lay substantially parallel to said glass plate and hold an object to be projected against said glass plate; cooling air fan means mounted in said housing to provide an air stream into and through said housing; and flow path guide means for directing the cooling air stream flow upward within said housing to against and along the underside of said glass plate and out from said housing, said flow path guide means comprising at least the major portions of both said reflective and nonreflective surfaces of said projection light mirror means.
Claim 3
Dependent Claim
27 words
An episcope as claimed in claim 1, wherein said means pivotally supporting said pressure plate includes provision enabling quick disconnection of said pressure plate from said housing.
Claim 4
Dependent Claim
31 words
An episcope as claimed in claim 1, wherein magnetic fastening means disposed in saId pressure plate and said housing structure provides retention force to maintain said pressure plate in closed condition.
Claim 5
Dependent Claim
29 words
An episcope as claimed in claim 1 wherein said projection light means includes high intensity projection lamp means and a low-power auxiliary lamp means to provide low intensity illumination.
Claim 6
Dependent Claim
40 words
An episcope as defined in claim 1 wherein said projection light mirror means includes concave projection light mirrors extending across the housing and at least a portion of said concave mirrors constitutes a part of said flow path guide means.
Claim 7
Dependent Claim
64 words
An episcope as claimed in claim 5, wherein at least one said concave mirror extends laterally across said housing, adjacent and spaced slightly under the rear edge of said glass plate to provide a slotted nozzle, said fan means is located rearward of said at least one concave mirror and forces air through said nozzle, against and along the underside of said glass plate.
Claim 8
Dependent Claim
52 words
An episcope as claimed in claim 1, wherein said projection light mirror means includes concave projection light mirrors across the housing adjacent edges of said glass plate and said projection light means includes quartz-halogen lamps arranged in the focus of said concave mirrors for illumination of an object on said glass plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |