Patent US3898874A successfully refreshed from Google Patents.
US3898874A
Expired / Lapsed
US
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Control input switching apparatus
Assignee: Carl Schenck AG
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Filing: 1974-04-15
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Granted: 1975-08-12
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Expires: 1994-04-15
Abstract
Abstract The present control input switching apparatus is useful, especially in connection with hydraulically operated dynamic testing machines for connecting a control input of an adjustment member from one regulator output to another regulator output. For this purpose variable resistor means are connected between the regulator output and the control input. The respective resistor means are simultaneously varied so that one resistance increases while the other resistance decreases and vice versa to assure a smooth transition. The resistor means may, for example, be light sensitive resistors and light source means connected to an integrating circuit may be used to vary these light sensitive resistor means.
Inventors
- 👤 Carl Martin Wawra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:17
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01N3/36; G01N2203/00; G01N2203/0014; G01N2203/0016; G01N2203/003; G01N2203/0042; G01N2203/0048
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
200 words
An apparatus for switching a control input of an adjustment member in a material testing machine from an output of a first regulating means of said material testing machine to an output of a second regulating means of said material testing machine and vice versa, comprising first variable resistor means directly connected to said control input to continuously apply the output of said first regulating means to said control input independently of the voltage at said control input, second variable resistor means directly connected to said control input to continuously apply the output of said second regulating means to said control input independently of the voltage at said control input, whereby the proportion of the outputs of said regulating means at said control input of the adjustment member is dependent upon the resistance of said first and second resistor means respectively, varying means operatively coupled to said first and second variable resistor means for varying the resistance thereof, and means for controlling said varying means whereby the resistance of one of said first and second variable resistor means is increased while the resistance of the other of said first and second variable resistor means is simultaneously decreased and vice versa.
Claim 2
Independent Claim
200 words
An apparatus for switching a control input of an adjustment member in a material testing machine from an output of a first regulating means of said material testing machine to an output of a second regulating means of said material testing machine and vice versa, comprising first variable resistor means directly connected to said control input to continuously apply the output of said first regulating means to said control input independently of the voltage at said control input, second variable resistor means directly connected to said control input to continuously apply the output of said second regulating means to said control input independently of the voltage at said control input, whereby the proportion of the outputs of said regulating means at said control input of the adjustment member is dependent upon the resistance of said first and second resistor means respectively, varying means operatively coupled to said first and second variable resistor means for varying the resistance thereof, and means for controlling said varying means whereby the resistance of one of said first and second variable resistor means is increased while the resistance of the other of said first and second variable resistor means is simultaneously decreased and vice versa.
Claim 3
Dependent Claim
19 words
The apparatus according to claim 1, wherein said first and second variable resistor means comprise light sensitive resistor means.
Claim 4
Dependent Claim
17 words
The apparatus according to claim 1, wherein said first and second variable resistor means are Hall generators.
Claim 5
Dependent Claim
19 words
The apparatus according to claim 1, wherein said first and second variable resistor means are temperature responsive resistor means.
Claim 6
Dependent Claim
19 words
The apparatus according to claim 1, wherein said first and second variable resistor means are pressure responsive resistor means.
Claim 7
Dependent Claim
115 words
The apparatus according to claim 1, wherein said first and second variable resistor means are first and second variable light sensitive resistor means, wherein said varying means are first and second light source means arranged for providing a light exposure for said first and second light sensitive resistor means, and wherein said means for controlling said varying means are exposure control means comprising a separate opaque chamber for each light sensitive resistor means, an aperture in each chamber for passing light from said light source means to the respective light sensitive resistor means, shutter means for closing said apertures, and actuating means operatively connected to said shutter means for selectively opening and closing said apertures.
Claim 8
Dependent Claim
66 words
The apparatus according to claim 6, wherein said shutter means comprise an elongated plate having aperture closing ends, said actuating means comprising a shaft, means for rigidly securing said plate to said shaft, means for rotatably supporting said shaft in such a position intermediate said apertures that rotation of the shaft will move said plate ends across said apertures in a closing and opening sense respectively.
Claim 9
Dependent Claim
34 words
The apparatus according to claim 7, wherein each aperture has a center, said shaft being located with its longitudinal axis intermediate said centers but off center relative to a line connecting said aperture centers.
Claim 10
Dependent Claim
63 words
The apparatus according to claim 7, wherein said shutter means comprise an elongated plate having aperture closing ends, said apparatus further comprising guide means for said plate, said actuating means comprising means operatively connected to said plate for shifting said plate back and forth along said guide means for opening one of said apertures while simultaneously closing the other aperture and vice versa.
Claim 11
Dependent Claim
78 words
The apparatus according to claim 1, wherein said first and second variable resistor means are Hall-generators, said varying means comprising magnetic circuit means with first and second gaps therein, said first and second Hall-generators being located in said first and second gaps respectively, said means for controlling the varying means including a rotatable soft iron core arranged in said magnetic circuit means, and means for rotating said soft iron core for varying the magnetic fields through said gaps.
Claim 12
Dependent Claim
15 words
The apparatus according to claim 10, wherein said magnetic circuit means comprise a permanent magnet.
Claim 13
Independent Claim
234 words
An apparatus for switching a control input of an adjustment member from an output of a first regulating means to an output of a second regulating means and vice versa, comprising first variable resistor means connected to continuously apply the output of said first regulating means to said control input, second variable resistor means connected to continuously apply the output of said second regulating means to said control input, whereby the proportion of the outputs of said regulating means at said control input is dependent upon the resistance of said first and second resistor means respectively, varying means operatively coupled to said first and second variable resistor means for varying the resistance thereof, and means for controlling said varying means, whereby the resistance of one of said first and second resistor means is increased while the resistance of the other of said first and second resistor means is being decreased and vice versa, said means for controlling the varying means comprising integrator circuit means connected to said varying means, said integrator circuit means including an input and means for alternately connecting said input of the integrator circuit means to different polarities for providing an electrical supply to said varying means which supply increases and decreases depending upon the respective polarity supplied to said input of the integrator circuit means, whereby an additive signal combination is supplied to said control input of said adjustment member.
Claim 14
Independent Claim
234 words
An apparatus for switching a control input of an adjustment member from an output of a first regulating means to an output of a second regulating means and vice versa, comprising first variable resistor means connected to continuously apply the output of said first regulating means to said control input, second variable resistor means connected to continuously apply the output of said second regulating means to said control input, whereby the proportion of the outputs of said regulating means at said control input is dependent upon the resistance of said first and second resistor means respectively, varying means operatively coupled to said first and second variable resistor means for varying the resistance thereof, and means for controlling said varying means, whereby the resistance of one of said first and second resistor means is increased while the resistance of the other of said first and second resistor means is being decreased and vice versa, said means for controlling the varying means comprising integrator circuit means connected to said varying means, said integrator circuit means including an input and means for alternately connecting said input of the integrator circuit means to different polarities for providing an electrical supply to said varying means which supply increases and decreases depending upon the respective polarity supplied to said input of the integrator circuit means, whereby an additive signal combination is supplied to said control input of said adjustment member.
Claim 15
Dependent Claim
68 words
The apparatus according to claim 12, wherein said first and second variable resistor means comprise respective first and second light sensitive resistor means, wherein said varying means comprise light source means arranged for cooperation with said first and second light sensitive resistor means and connected to said integrator circuit means to provide an increasing and a decreasing light exposure for said first and second light sensitive resistor means.
Claim 16
Dependent Claim
37 words
The apparatus according to claim 13, further comprising opaque means for screening one of said light sensitive resistor means and its respective light source means from the other light sensitive resistor means and its light source means.
Claim 17
Dependent Claim
61 words
The apparatus according to claim 12, wherein said first and second variable resistor means comprise first and second Hall-generator means, said varying means comprising magnet means including electrical coils for creating varying magnetic fields, said Hall-generator means being disposed to be conrolled by said varying magnetic fields, said electrical coils of said magnet means being connected to said integrator circuit means.
Claim 18
Dependent Claim
58 words
The apparatus according to claim 12, wherein said first and second variable resistor means comprise respective first and sEcond temperature responsive resistor means, said varying means including first and second Peltier elements arranged for cooperation with the respective first and second temperature responsive resistor means, said first and second Peltier elements being connected to said integrator circuit means.
Claim 19
Dependent Claim
23 words
The apparatus according to claim 12, wherein said first and second variable resistor means comprise respective first and second pressure responsive resistor means.
Claim 20
Dependent Claim
119 words
The apparatus according to claim 12, wherein said varying means comprise two members each having an input and both having a common input terminal, said integrating circuit means comprising a positive voltage source connected to the input of one of said varying members, a negative voltage source connected to the input of the other of said varying members, an active integrating means, an integrator output connected to said common input terminal between said varying means, an integrator input, and switching means for connecting said integrator input to one of said voltage sources at a time whereby the supply voltage for said varying means is increased and decreased in response to the polarity of the voltage at said integrator input.
Claim 21
Dependent Claim
47 words
The apparatus according to claim 18, wherein said active integrating means comprise an amplifier having an output connected to said common input terminal and an amplifier input, a resistor for connecting said amplifier input to said switching means, and a capacitor connected in parallel to said amplifier.
Claim 22
Dependent Claim
193 words
In an apparatus for applying a control signal to a single control input of an adjustment member in a testing machine by switching said control input from an output of a first regulating means to an output of a second regulating means and vice versa, the improvement comprising first and second variable resistor means connected to form a series connection with each other, said series connection having outer ends connected to the output of the respective regulating means, said series connections having a tap intermediate its ends connected to said single control input, resistor varying means operatively associated with said first and second variable resistor means respectively, and means for controling said varying means to increase the resistance of one of said two variable resistors while simultaneously decreasing the resistance of the other of said variable resistors and vice versa, whereby said control signal applied to said control input of said adjustment member comprises an increasing signal component from the regulating means with the variable resistor, the resistance of which is being decreased and a decreasing signal component from the regulating means with the variable resistor the resistance of which is being increased.
Claim 23
Dependent Claim
193 words
In an apparatus for applying a control signal to a single control input of an adjustment member in a testing machine by switching said control input from an output of a first regulating means to an output of a second regulating means and vice versa, the improvement comprising first and second variable resistor means connected to form a series connection with each other, said series connection having outer ends connected to the output of the respective regulating means, said series connections having a tap intermediate its ends connected to said single control input, resistor varying means operatively associated with said first and second variable resistor means respectively, and means for controling said varying means to increase the resistance of one of said two variable resistors while simultaneously decreasing the resistance of the other of said variable resistors and vice versa, whereby said control signal applied to said control input of said adjustment member comprises an increasing signal component from the regulating means with the variable resistor, the resistance of which is being decreased and a decreasing signal component from the regulating means with the variable resistor the resistance of which is being increased.
References Cited (Backward Citations)
US2244239A
Cited
US3304768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |