Patent US2477000A successfully refreshed from Google Patents.
US3828611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable underwater indicating instrument for divers
Assignee: Farallon Industries Inc
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Filing: 1972-11-10
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Granted: 1974-08-13
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Expires: 1992-11-10
Abstract
Abstract A portable underwater indicating instrument includes means for measuring a quantity of interest, such as time, pressure, temperature, magnetic field direction, or the like, and indicating means for indicating to the diver the measured quantity. The indicating means includes a dial having a face portion for viewing by the diver through a transparent window of a fluid tight housing. The dial face includes a fluorescent background with contrasting indicia of the measured quantity thereon. A light is provided in the housing for illuminating the fluorescent background portion of the dial. A manually operated switch controls energization of the light. The fluorescent background improves the visibility of the dial and also allows the lighted fluorescent dial to serve as an emergency light source. In a preferred embodiment, a pair of back-to-back pressure gauges are included within a common housing, one of the pressure gauges measures the diving depth and the second gauge measures the air pressure in the diver''s scuba tank as communicated to the gauge over a flexible hose.
Inventors
- 👤 R Shamlian
- 👤 A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:41
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; G; G01; G01L; G01L7/00; G01L7/02; G01L7/04; G01L7/043; G04; G04B; G04B19/00; G04B19/30; B63C2011/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
In a portable underwater indicating instrument to be carried by and for use by a diver: measuring means for measuring a quantity of interest to the diver; indicating means coupled to said measuring means for indicating to the diver the measured quantity of interest; housing means for housing said measuring and indicating means and having a transparent window portion for viewing of said indicating means; said indicating means including, a dial means having a face portion facing outwardly of said housing for viewing by the diver, said face portion having a fluorescent background with a light contrasting indicia of the measured quantity thereon; and means for artifically illuminating said dial face portion of said indicating means with light to charge said fluorescent background, said illuminating means being coupled to said housing means to be carried with said housing, said illuminating means including, a light bulb coupled to said housing for illuminating said background, a battery chamber for containing a battery to be connected fOr energizing said light bulb, and a switch connected in circuit with the battery and said bulb for controlling the energization of said light bulb.
Claim 2
Dependent Claim
188 words
In a portable underwater indicating instrument to be carried by and for use by a diver: measuring means for measuring a quantity of interest to the diver; indicating means coupled to said measuring means for indicating to the diver the measured quantity of interest; housing means for housing said measuring and indicating means and having a transparent window portion for viewing of said indicating means; said indicating means including, a dial means having a face portion facing outwardly of said housing for viewing by the diver, said face portion having a fluorescent background with a light contrasting indicia of the measured quantity thereon; and means for artifically illuminating said dial face portion of said indicating means with light to charge said fluorescent background, said illuminating means being coupled to said housing means to be carried with said housing, said illuminating means including, a light bulb coupled to said housing for illuminating said background, a battery chamber for containing a battery to be connected fOr energizing said light bulb, and a switch connected in circuit with the battery and said bulb for controlling the energization of said light bulb.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein said fluorescent background is made of a fluorescent vinyl material.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 wherein said indicia are of a dark color relative to said background.
Claim 5
Dependent Claim
21 words
The apparatus of claim 1 including a wrist strap affixed to said housing for strapping said housing to the diver''s wrist.
Claim 6
Dependent Claim
52 words
The apparatus of claim 1 wherein said switch includes a manually depressible button for actuation by the diver to turn on said switch, and means for spring biasing said switch to the off position such that in the absence of manual depression of said button said switch is in the off position.
Claim 7
Dependent Claim
34 words
The apparatus of claim 1 wherein said housing includes a battery compartment for containing said battery, a removable closure for closing said compartment, and wherein said switch means is carried in said removable closure.
Claim 8
Dependent Claim
46 words
The apparatus of claim 4 including, a battery housing for housing said battery and being carried from said strap, said battery housing including a removable closure portion closing said housing, and wherein said switch means is carried in said removable closure portion of said battery housing.
Claim 9
Dependent Claim
48 words
The apparatus of claim 1 wherein said light bulb is disposed outwardly of said dial face portion of said indicating means and, including, a light reflective means at least partially circumscribing the outer periphery of said dial for reflecting illumination back onto said fluorescent background of said dial.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |