US3710359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work sampler for magnetically recording information in time-coordinated bits
Assignee: Ricoh Co Ltd
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Filing: 1971-01-15
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Granted: 1973-01-09
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Expires: 1991-01-15
Abstract
Abstract A rotatably mounted drum driven by a clock mechanism mounts a magnetic recording sheet. A magnetic head is cooperable with the recording sheet and is arranged for connection to a magnetic recording circuit which includes a switch controlling energization of the circuit in accordance with changes in a physical state to be recorded. The clock mechanism effects relative movement of the magnetic head and the sheet in chronological sequence and includes means operable to connect the recording circuit to the magnetic head once during each unit time interval to record information magnetically on the sheet during unit time intervals in which the circuit is energized by its control switch. The drum is rotatably mounted on a cylinder containing a dry cell serving as a source of potential for the recording circuit and for winding means of the clock mechanism. The information recorded on the recording sheet may be made available through a magnetic pickup head or through printout means.
Inventors
- 👤 H Sawada
- 👤 E Rin
- 👤 I Yamada
- 👤 H Mano
- 👤 Gourty T Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06; G07; G07C; G07C1/00; G07C1/02; G07C1/08; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
320 words
In a work sampling system, a work sampler comprising, in combination, a rotatably mounted drum arranged to mount a magnetic recording sheet; ratchet and pawl mechanism operable to step said drum angularly in one direction; a rotatable cam operating said ratchet and pawl mechanism to step said drum angularly at preset time intervals; spring-driven clock mechanism rotating said cam at a regulated rate; a magnetic head cooperable with a magnetic recording sheet mounted on said drum to record information on the sheet; means operable by said clock mechanism and connected to said head to shift said head axially of said drum in coordination with said stepping of said drum; a selfcontained source of electric potential; electrically energized means operable to rewind the spring of said clock mechanism; means operable by said clock mechanism to connect said electrically energized means periodically to said source of electric potential; a magnetic recording circuit arranged for connection to said magnetic head and including energy storage capacitor means; a switch in said circuit controlling energization of said circuit by said source of potential in accordance with changes in a physical state to be recorded; and a second switch connected to said storage capacitor means and having a first position connecting said storage capacitor means to said source of potential through said first-mentioned switch, and a second position connecting said storage capacitor means across said magnetic head; said rotatable cam operating said second switch, once during each unit time interval to a second position connecting said storage capacitor means across said magnetic head; whereby, whenever said first-mentioned switch is closed and said second switch is in its first position said storage capacitor means is charged, and said magnetic head is energized responsive to movement of said second switch by said rotatable cam to its second position to record magnetically an information bit on the recording sheet mounted on said drum during the associated unit time interval.
Claim 2
Dependent Claim
320 words
In a work sampling system, a work sampler comprising, in combination, a rotatably mounted drum arranged to mount a magnetic recording sheet; ratchet and pawl mechanism operable to step said drum angularly in one direction; a rotatable cam operating said ratchet and pawl mechanism to step said drum angularly at preset time intervals; spring-driven clock mechanism rotating said cam at a regulated rate; a magnetic head cooperable with a magnetic recording sheet mounted on said drum to record information on the sheet; means operable by said clock mechanism and connected to said head to shift said head axially of said drum in coordination with said stepping of said drum; a selfcontained source of electric potential; electrically energized means operable to rewind the spring of said clock mechanism; means operable by said clock mechanism to connect said electrically energized means periodically to said source of electric potential; a magnetic recording circuit arranged for connection to said magnetic head and including energy storage capacitor means; a switch in said circuit controlling energization of said circuit by said source of potential in accordance with changes in a physical state to be recorded; and a second switch connected to said storage capacitor means and having a first position connecting said storage capacitor means to said source of potential through said first-mentioned switch, and a second position connecting said storage capacitor means across said magnetic head; said rotatable cam operating said second switch, once during each unit time interval to a second position connecting said storage capacitor means across said magnetic head; whereby, whenever said first-mentioned switch is closed and said second switch is in its first position said storage capacitor means is charged, and said magnetic head is energized responsive to movement of said second switch by said rotatable cam to its second position to record magnetically an information bit on the recording sheet mounted on said drum during the associated unit time interval.
Claim 3
Dependent Claim
63 words
In a work sampling system, a work sampler, as claimed in claim 1, incluDing a hollow cylinder rotatably and coaxially mounting said drum; said cylinder being constructed and arranged to receive and support a dry cell constituting said source of potential, and being provided with electric terminals cooperable with the electric terminals of a dry cell mounted in said cylinder and supported thereby.
Claim 4
Dependent Claim
83 words
In a work sampling system, a work sampler, as claimed in claim 1, in which said ratchet and pawl mechanism comprises a ratchet secured coaxially to said drum; a lever pivotally mounted intermediate its ends and carrying a pawl pivotally connected to one end and engaged with said ratchet; the other end of said lever being in operating association with said second switch; and a roller on said lever engaged with said rotatable cam for oscillation of said lever by said rotatable cam.
Claim 5
Dependent Claim
76 words
In a work sampling system, a work sampler, as claimed in claim 1, in which said storage capacitor means comprises two capacitors charged by closure of said first mentioned switch with said second switch in its first position, and connected in series across said magnetic recording head when said second switch is moved to its second position by said cam to increase the voltage applied across said magnetic recording head by discharge of said two capacitors.
Claim 6
Dependent Claim
105 words
In a work sampling system, a work sampler, as claimed in claim 1, in which each magnetic recording sheet is provided with a pair of holes adjacent one end thereof; said drum having a pair of finger means mounted thereon for pressing a magnetic recording sheet against the outer surface of said drum; respective pin means each disposed adjacent a finger means and arranged to engage in the holes of a magnetic recording sheet positioned beneath said finger means; and means mounting said pin means for retraction inwardly of the surface of said drum for feeding of a magnetic recording sheet beneath said finger means.
Claim 7
Dependent Claim
48 words
In a work sampling system, a work sampler, as claimed in claim 1, in which said magnetic recording circuit includes a receptacle in said work sampler and externally accessible; a plug releasable engageable in said receptacle; and a pair of conductors connecting said first-mentioned switch to said plug.
Claim 8
Dependent Claim
136 words
In a work sampling system, a work sampler, as claimed in claim 1, in which said drum is formed with a series of serrations extending axially thereof and aligned in a row extending circumferentially of said drum; a pivoted click-stop lever selectively engageable with said serrations to latch said drum in a selected position; a main control switch connected in series with said first-named switch and controlling connection of said first-named switch to said source of electric potential; an operator for said main control switch; and a pivoted lever engageable with said operator and operable, responsive to opening of said main control switch, to latch said click-stop lever in engagement with a serration of said drum; said pivotal lever, responsive to closing of said main control switch, releasing said click-stop lever for rotation of said drum.
Claim 9
Dependent Claim
109 words
In a work sampling system, as claimed in claim 1, a device for reproducing information recorded on a magnetic recording sheet mounted on said drum by said magnetic head; said device comprising a rotatably mounted reproducing drum arranged to have the magnetic recording sheet mounted thereon; means for rotating said reproducing drum; a magnetic reproducing head; means mounting said reproducing head for movement axially of said reproducing drum as said reproducing drum is rotated to scan magnetic information on a magnetic recording sheet mounted on said reproducing drum; and converter means connected to said magnetic reproducing head and operable to convert the magnetically recorded information into corresponding visible information.
Claim 10
Dependent Claim
81 words
In a work sampling system, a work sampler, as claimed in claim 1, including said rachet and pawl mechanism being operable by said clock mechanism to step said drum angularly once each minute through an angular dIstance of 6*, whereby said drum makes one complete rotation in 1 hour; a minute indicating scale extending circumferentially of said drum; and a fixed indicator cooperable with said scale to indicate the starting time of said drum and the elapsed time of rotation thereof.
Claim 11
Dependent Claim
127 words
In a work sampling system, a work sampler, as claimed in claim 9, including a rotatably mounted threaded shaft; driving means interconnecting said shaft and said drum and rotating said shaft at the same angular velocity as said drum; an engaging member engaged with the threads of said shaft for movement axially of said shaft; a mounting member mounted for movement parallel to said shaft and connected to said engaging member, said magnetic head being mounted on said mounting member; each complete rotation of said drum advancing said magnetic head to the distance of one pitch of the thread of said threaded shaft; an hours scale extending along said threaded shaft and indicating 24 hours; and a pointer on said mounting member cooperable with said hours scale.
References Cited (Backward Citations)
US583953A
Cited
US2447803A
Cited
US2888311A
Cited
US3094700A
Cited
US3191181A
Cited
US3104928A
Cited
US3277244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |