US210587A - Improvement in sewing-machine casters - Google Patents
Improvement in sewing-machine casters Download PDFInfo
- Publication number
- US210587A US210587A US210587DA US210587A US 210587 A US210587 A US 210587A US 210587D A US210587D A US 210587DA US 210587 A US210587 A US 210587A
- Authority
- US
- United States
- Prior art keywords
- machine
- frame
- casters
- sewing
- improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
- B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
- B62B3/0625—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using rigid mechanical lifting mechanisms, e.g. levers, cams or gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
- B60B33/06—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted retractably
Definitions
- RQWBHRLE Sewing-Machine Casters.
- Myimprovement consists in securing the legs of the machine to a rectangular frame or base, within which is a middle base or platform supported on casters.
- the outer frame is arranged to be lifted so as to bring the weight of the machine upon the casters.
- the invention also applies to .the mechanism for raising the outer frame for the purpose aforesaid.
- a treadle-lever is fulcrumed upon the outer frame, and this treadle-lever is connected by links to two levers fulcrumed upon the caster-platform, each of which forms the arm of a rock-shaft having bearin g upon the base-frame, and having an inwardly-extendin g arm connected to the caster-platform.
- Figure 1 is a perspective view of my attachment, with the machine resting rigidly upon the floor.
- Fig.2 is a transverse section, showing the machine supported on the casters.
- the legs of the machine are shown at A. They are attachedat bottom to a rectangular frame, B.
- the inside of the frame is occupied by a platform, O, at whose corners are casters D, upon which the machine is supported when the frame B is raised, as seen in Fig. 2.
- E is a foot-lever, fulcrumed to the frame at e, and whose middle is connected by links F to the levers G.
- Each lever G is fulcrumed upon the platform at g, and at its outer end is a rock-shaft, H, turning in bearings h upon.
- the rock-shaft H has an arm, h, which is connected to the platform at I.
- the foot-lever Works in guides J K, and, when down, engages beneath acatch, L.
- the catch L is in the form of a bell-crank, and its inner arm has connected to it a rod, M, whose weight tends to throw the catch out into the position shown.
- the rod passes through a guide, m, attached by screws to the under side of table N.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Sewing Machines And Sewing (AREA)
Description
2 Sheets-Sheet 1.
R. WEHRLE. Sewing-Machine Casters.
Patented Dec. 3,1878.
rwzrzns, F n, WASHINGTON n c 2" Sheets-Sheet 2.
RQWBHRLE. Sewing-Machine Casters.
NVFErERS, FHOTO-LITHOGRAPHER. WASHINGTON. 0. Q C
UNITED STATES PATENT OFFICE.
ROBERT WEHRLE, OF ST. LOUIS, MISSOURI.
IMPROVEMENT IN SEWING-MACHINE CASTERS Specification forming part of Letters Patent No. 210,587, dated December 3, 1878; application filed Y October 26, 1878.
To all whom it may concern:
Be it known that I, BOBERTWEHRLE, of the city of St. Louis, in the State of Missouri, have invented a new and useful Improvement in Caster Attachments for Sewing-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.
Myimprovement consists in securing the legs of the machine to a rectangular frame or base, within which is a middle base or platform supported on casters. The outer frame is arranged to be lifted so as to bring the weight of the machine upon the casters.
The invention also applies to .the mechanism for raising the outer frame for the purpose aforesaid. A treadle-lever is fulcrumed upon the outer frame, and this treadle-lever is connected by links to two levers fulcrumed upon the caster-platform, each of which forms the arm of a rock-shaft having bearin g upon the base-frame, and having an inwardly-extendin g arm connected to the caster-platform.
When the foot or treadle lever is forced downward the sewing-machine and base-frame are raised, so as to bring the whole weight of the machine upon the casters. Otherwise the base-frame rests firmly upon the carpet.
Figure 1 is a perspective view of my attachment, with the machine resting rigidly upon the floor. Fig.2 is a transverse section, showing the machine supported on the casters. The legs of the machine are shown at A. They are attachedat bottom to a rectangular frame, B. The inside of the frame is occupied by a platform, O, at whose corners are casters D, upon which the machine is supported when the frame B is raised, as seen in Fig. 2.
E is a foot-lever, fulcrumed to the frame at e, and whose middle is connected by links F to the levers G. Each lever G is fulcrumed upon the platform at g, and at its outer end is a rock-shaft, H, turning in bearings h upon.
the frame B. The rock-shaft H has an arm, h, which is connected to the platform at I.
The foot-lever Works in guides J K, and, when down, engages beneath acatch, L. The catch L is in the form of a bell-crank, and its inner arm has connected to it a rod, M, whose weight tends to throw the catch out into the position shown.
The rod passes through a guide, m, attached by screws to the under side of table N.
It will be observed that the frame 13 and platform 0 form a close floor beneath the machine, which prevents any oil dropping upon the carpet. This is a great practical benefit, as it does away with the necessity of placing a cloth-or paper beneath the machine.
I claim as my in,vention 1. The combination of the base or frame B, directly supporting the sewing-machine, and inner base frame or platform, 0, supported upon casters, and connected to frame B by a lifting device, for the purpose set forth.
2. The combination of frame B, platform (3,
casters D, levers and links E F G, shaft H, arm It, and catch L, substantially as and for the purpose set forth.
ROBERT WEHRLE. Witnesses:
SAML. KNIGHT, FRANK FISHWIOK.
Publications (1)
Publication Number | Publication Date |
---|---|
US210587A true US210587A (en) | 1878-12-03 |
Family
ID=2279994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US210587D Expired - Lifetime US210587A (en) | Improvement in sewing-machine casters |
Country Status (1)
Country | Link |
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US (1) | US210587A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040139310A1 (en) * | 2002-01-31 | 2004-07-15 | Akiyoshi Maeda | Information processing apparatus, memory management apparatus, memory management method, and information processing method |
-
0
- US US210587D patent/US210587A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040139310A1 (en) * | 2002-01-31 | 2004-07-15 | Akiyoshi Maeda | Information processing apparatus, memory management apparatus, memory management method, and information processing method |
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