US3596122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
"inside out" dynamo electric machines
Assignee: Girling Ltd
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Filing: 1969-01-31
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Granted: 1971-07-27
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Expires: 1989-01-31
Abstract
Abstract A dynamo electric machine comprising a rotor structure and a stator structure the rotor structure being adapted to be secured to a shaft the speed of which is to be measured, a bearing supported by the rotor structure and the stator structure being carried by said bearing and a pin and slot connection between the stator structure and a fixed member whereby as the shaft rotates relative angular movement will take place between the rotor and stator structure.
Inventors
- 👤 Charles G Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/22; H02K21/227; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/46; G01P3/465; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
A dynamo electric machine for mounting on a fixed part which houses a rotary shaft carried in a bearing, said machine providing an electrical signal indicative of the speed of rotation of the shaft, said machine comprising, in combination: a toothed rotor structure adapted to be secured to the rotary shaft; bearing means supported by said rotor structure; a stub shaft associated with said bearing means, said stub shaft having a flange thereon; a stator structure carried by said bearing means and said stub shaft; resilient biasing means for urging said flange into contact with a thrust face defined on said rotor structure; a pin and alot connection between said stator structure and a stationary member which is coupled to the fixed part which houses the rotary shaft, said pin and slot connection including an arm coupled to said stator structure running between said stator structure and said stationary member, whereby as the shaft rotates relative angular movement will take place between said rotor and stator structure.
Claim 2
Dependent Claim
167 words
A dynamo electric machine for mounting on a fixed part which houses a rotary shaft carried in a bearing, said machine providing an electrical signal indicative of the speed of rotation of the shaft, said machine comprising, in combination: a toothed rotor structure adapted to be secured to the rotary shaft; bearing means supported by said rotor structure; a stub shaft associated with said bearing means, said stub shaft having a flange thereon; a stator structure carried by said bearing means and said stub shaft; resilient biasing means for urging said flange into contact with a thrust face defined on said rotor structure; a pin and alot connection between said stator structure and a stationary member which is coupled to the fixed part which houses the rotary shaft, said pin and slot connection including an arm coupled to said stator structure running between said stator structure and said stationary member, whereby as the shaft rotates relative angular movement will take place between said rotor and stator structure.
Claim 3
Dependent Claim
24 words
A machine as claimed in claim 1 including means for locating the rotor and stator structures relative to each other in an axial direction.
Claim 4
Dependent Claim
49 words
A machine as claimed in claim 1 in which the stator structure is mounted upon a cup-shaped part, the base wall of which is provided with an aperture through which the stub shaft extends, the base wall being sandwiched between said arm and the flange of the stub shaft.
Claim 5
Dependent Claim
36 words
A machine as claimed in claim 3 in which the arm and the cup-shaped part are retained upon the stub shaft by means of a nut engaged with a screw threaded portion of the stub shaft.
Claim 6
Dependent Claim
35 words
A machine as claimed in claim 4 in which the end of the stub shaft remote from the nut is provided with a circlip to prevent separation of the rotor and stator structures after assembly.
Claim 7
Dependent Claim
44 words
A machine as claimed in claim 5 in which said bearing means comprises a bush in which the stub shaft is located, the end of the bush adjacent the flange having an outwardly extending flange the end face of which defined said thrust face.
Claim 8
Dependent Claim
44 words
A machine as claimed in claim 6 in which said arm carries the pin of said pin and lot connection, the pin being bored to accommodate electrical connections to a coil carried by the stator structure and in which the electrical signal is induced.
Claim 9
Dependent Claim
52 words
A machine as claimed in claim 7 in which the rotor structure includes a member of annular form and which has defined in its face presented to the arm, an annular recess said recess adjacent its inner periphery serving to accommodate said winding, and mounting on its outer periphery, an annular magnet.
Claim 10
Dependent Claim
27 words
A machine as claimed in claim 8 in which the magnet is retained within the recess by washers carried by bolts respectively extending through the annular member.
Claim 11
Dependent Claim
28 words
A machine as claimed in claim 11 in which said bolts secure the annular member to an adapter plate which is adapted to be secured to the shaft.
Claim 12
Dependent Claim
57 words
A machine as claimed in claim 10 in which the resilient means is in the form of a leaf spring one end of which is secured to said fixed member and the other end of which bears upon the base wall of a cup-shaped member pressed into a recess formed in the arm and accommodating said nut.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |