Isometric ellipse drafting template (Helix H82)

Object/Artifact

-

Archive of Cuban Socialism

Name/Title

Isometric ellipse drafting template (Helix H82)

Entry/Object ID

2025.16.5

Description

Rectangular translucent plastic drafting stencil with cut-out ellipses for drawing in isometric projection. Twenty-six bevelled-edge elliptical apertures are arranged in three registers, each labeled with its major-axis dimension in millimeters; the upper long edge carries a graduated ruler scale. Surface is discolored with amber-brown staining and scattered scuffs but structurally intact. Approx. 200 × 118–125 mm per manufacturer specification (not independently measured).

Collection

Evelyn Sosa collection

Acquisition

Accession

2025.16

Source or Donor

Evelyn Sosa

Acquisition Method

Gift

Made/Created

Manufacturer

Helix

Place

Country

U.K.

Continent

Europe

Notes

Date: Undated. Cannot be confirmed within 1959–1990 and may fall outside it; the H82 model has remained in catalog for decades.

Inscription/Signature/Marks

Notes

"HELIX H82 / Made in England" (lower right) "35° 16′ ISOMETRIC / ELLIPSE TEMPLATE" (lower center) "METRIC" (lower left, molded relief) Edge ruler graduated 0–190 mm Aperture size labels: upper row 50, 45, 40, 35, 32; middle row 15, 16, 18, 20, 22, 25, 28, 30; lower row 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2 (26 ellipses, 2–50 mm — matches manufacturer's published specification)

Materials

Material Notes

Materials: Molded translucent rigid plastic (specific polymer not confirmed from image; current production is described by the maker as polypropylene). Technique: Injection-molded; brand and "METRIC" rendered in molded relief, scale graduations and remaining lettering screen-printed in black; apertures die-cut/molded with bevelled inner edges.

Condition

Overall Condition

Good

Relationships

Related Places

Place

Country

U.K.

Continent

Europe

Notes

production

Place

City

Havana

Country

Cuba

Region

Caribbean, Central America

Notes

use

Created By

María A. Cabrera Arús

Create Date

October 20, 2025

Updated By

María A. Cabrera Arús

Update Date

June 14, 2026