GB813349A - Counterbalance spring adjustment means for parallel motion linkage drafting machines - Google Patents
Counterbalance spring adjustment means for parallel motion linkage drafting machinesInfo
- Publication number
- GB813349A GB813349A GB2826256A GB2826256A GB813349A GB 813349 A GB813349 A GB 813349A GB 2826256 A GB2826256 A GB 2826256A GB 2826256 A GB2826256 A GB 2826256A GB 813349 A GB813349 A GB 813349A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- tension
- drum
- parallel motion
- motion linkage
- 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
Links
- 230000000717 retained Effects 0.000 abstract 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
- B43L13/06—Guides for rulers with pivoted guide rods
Landscapes
- Discharge By Other Means (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
813,349. Draughting machines. KUCHEJDA H. and REICH, C., [trading as SCHMIDT & HAENSCH, F.]. Sept. 15, 1956, No. 28262/56. Class 97(3) In a draughting machine of the parallel motion linkage type in which the drawing head is counter balanced by the tension in a spring, a flexible extension of the spring is windable on a drum which is retained against the tension of the spring by friction or by releasable locking means. As shown, conical surfaces 19, 20 frictionally engage under the axial thrust of spring dished washer 22 controlled by nut 24 and prevent drum 16 from being turned by the tension of a spring acting on member 15. Knob 17 can be rotated manually. Pin 21 is secured in fixed bracket 9 mounted on the drawing board. In another form (Figs. 4, 5, not shown) the drum is fast with a ratchet wheel which is retained by a manually releasable pawl. The pawl may be spring pressed against the ratchet wheel.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH17558A DE962141C (en) | 1955-03-22 | 1955-03-22 | Spring counterbalance for parallelogram drawing machines |
CH345268D CH345268A (en) | 1956-09-15 | 1956-09-15 | Spring counterbalancing device for drawing machines with the drawing head supporting parallelogram linkage |
FR1165575D FR1165575A (en) | 1956-09-15 | 1956-11-30 | Spring compensator for parallelogram drawing boards |
Publications (1)
Publication Number | Publication Date |
---|---|
GB813349A true GB813349A (en) | 1959-05-13 |
Family
ID=1741005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2826256A Expired GB813349A (en) | 1955-03-22 | 1956-09-15 | Counterbalance spring adjustment means for parallel motion linkage drafting machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB813349A (en) |
-
1956
- 1956-09-15 GB GB2826256A patent/GB813349A/en not_active Expired
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