EP0074190A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Writing device for plotting and recording apparatus
Assignee: GOULD BRYANS INSTRUMENTS Ltd
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Filing: 1982-08-13
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Granted: —
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Expires: 2002-08-13
Abstract
Abstract A recording or plotting apparatus has a pen (2) which is movable on a record surface and which is supported on a penholder or carriage (1). Two portions of cable (3) are connected to the penholder or carriage (1) and the lengths of these cable portions can be varied by a driving means (7) in order to move the penholder or carriage on the record surface. The cable portions are maintained under tension.
Inventors
- 👤 Robert Alan David Brash
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
G; G01; G01D; G01D9/00; G01D9/40; G01D15/00; G01D15/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A recording or plotting apparatus comprising a penholder or carriage supporting a pen which is movable on a record surface; two portions of cable connected to the penholder or carriage; driving means for varying the lengths of cable portions thereby to move the penholder or carriage on the record surface; and means for maintaining the cable portions under tension.
Claim 2
Dependent Claim
59 words
A recording or plotting apparatus comprising a penholder or carriage supporting a pen which is movable on a record surface; two portions of cable connected to the penholder or carriage; driving means for varying the lengths of cable portions thereby to move the penholder or carriage on the record surface; and means for maintaining the cable portions under tension.
Claim 3
Dependent Claim
92 words
An apparatus as claimed in claim 1 wherein the cable portions are portions of a guide wire passed around pulleys so disposed with respect to one another that the guide wire has a figure-eight configuration, the penholder or carriage being disposed at or near the point of intersection of the figure-eight, one of the said pulleys being located on the penholder or carriage and the free ends of the guide wire being anchored to the penholder or carriage and tensioning means bearing on a portion of the guide wire between two pulleys.
Claim 4
Dependent Claim
21 words
An apparatus as claimed in claim 2 wherein the guide wire is driven to move round the pulleys by drive scrolls.
Claim 5
Dependent Claim
93 words
An apparatus as claimed in claim 1, wherein two separate cable portions are each connected at one end to the penholder or carriage and are each connected at the other end to a drive scroll, the drive scrolls being so disposed that the paths of the cable portions diverge from the penholder or carriage, another cable portion being passed round a pulley disposed on the penholder or carriage and two other pulleys spaced therefrom, the ends of the said other cable portions being connected to a tensioning device arranged between the two pulleys.
Claim 6
Dependent Claim
83 words
An apparatus as claimed in claim 1 wherein the two ends of a cable are anchored to the penholder or carriage and the cable is passed round a plurality of pulleys one of which is located on the penholder or carriage, the other pulleys being so disposed with respect to one another that a portion of the cable follows a figure-eight configuration and another portion of the cable forms a tensioning device, tensioning means being provided to maintain the tensioning loop under tension.
Claim 7
Independent Claim
50 words
An apparatus as claimed in any one of the preceding claims wherein the penholder or carriage is provided with an electric solenoid operable to raise or lower the pen from and to the record surface, at least one of the cable portions being arranged to convey electricity to the solenoid.
References Cited (Backward Citations)
No citation records indexed.
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