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The mission of the San Mateo County Historical Association is to inspire wonder and discovery
of the cultural and natural history of San Mateo County.

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  1. Carriage Ceramic Foot Warmer - Warmer, Foot

    Ceramic foot warmer is made of clay and constructed by hand. It is composed of a hollow cylinder with a flat bottom, a spout at the top center and two hand formed and pressed handles on either side of the spout. The spout has a wide lip and stopper is not present. Original gray-colored clay is visible on ends but rest of warmer has a golden-brown glaze. This foot warmer would have been filled with hot water and placed at one's feet when ridin...

    Record Type: Object

    Carriage Ceramic Foot Warmer
  2. Chemelex Electro-Wrap, c. 1960s - Heater, Strip

    Chemelex Electro-Wrap, c. 1960s. Electro-Wrap cut-to-length self-regulating heating strips produced by Chemelex, Inc. The piece of Electro-Wrap is made with a strip of paper printed with green and black ink encased in Teflon coating. The Chemelex logo appears at top center above text that reads, "CHEMELEX / ELECTRO-WRAP / [CSA symbol] / CAT. NO. 3152 / TEFLON / 300[degrees] F MAX. / 15 W/FT. / 230 VAC / 20AMPS MAX." The lower half...

    Record Type: Object

    Chemelex Electro-Wrap, c. 1960s
  3. Ray at Telecom Show, July 25, 1975 - Photograph, Black-and-White

    Telecom Show Chicago, July 25, 1975. Black and white contact sheet of 4 x 5 film shows three images of the puppet Ray the Raychem Seal with a Raychem Corporation telecom product. Ray appears at the top of each image next to a telephone. A cable leading away from the telephone curves back and forth across the image and connects to a second cable with rectangular hardware at lower right. The images are similar with Ray holding the telephone receive...

    Record Type: Photo

    Ray at Telecom Show, July 25, 1975
  4. Ray at Telecom Show, July 25, 1975 - Photograph, Black-and-White

    Ray at Telecom Show, July 25, 1975. Black and white contact sheet of 4 x 5 film shows three images of the puppet Ray the Raychem Seal with Raychem Corporation products. Ray appears at the top of each image with application equipment heaters arranged out in front of him. Several metal clamps and a swivel hook are chained together and rest of a piece of material with large grommets at bottom center. The images are similar with the only change the p...

    Record Type: Photo

    Ray at Telecom Show, July 25, 1975
  5. Raychem Auto-Trace Self-limiting Heaters Overhead Transparency, n.d. - Transparency

    Raychem Auto-Trace Self-limiting Heaters Overhead Transparency, n.d. Mylar transparency with black and red ink. The transparency is titled: "Auto-Trace Self-limiting Heaters / Respond to Temperature" printed in black at the top. Below the title is a line graph with y-axis at resistance and x-axis as temperature. There is a second graph printed below with y-axis as wattage and x-axis as temperature. Inscription: "Auto-Trace Self-limiting H...

    Record Type: Archive

    Raychem Auto-Trace Self-limiting Heaters Overhead Transparency
  6. Raychem Chemelex Auto-Trace Heating Cord, c. 1957-1999 - Heater, Strip

    Raychem Chemelex Auto-Trace Heating Cord, c. 1957-1999. Black plastic cord is flat with rounded edges. Edges are raised and middle of cord is flat and inset. One end of the cord has a two pronged black plastic plug. Prongs are brass. Plug has embossed vertical lines around edge closest to prongs and two embossed triangles running end to end. Between two prongs is a piece of green plastic reading, "REMOVE". The other end of the cord a plastic pie...

    Record Type: Object

    Raychem Chemelex Auto-Trace Heating Cord
  7. Raychem Chemelex Trace Heating Cables, c. 1957-1999 - Cable, Electric

    Raychem Chemelex Trace Heating Cables, c. 1957-1999. Three different colored wire cables. All the cables are rigid and flat. All cables are cut into about three inch long pieces. Cable (A) is has an orange plastic coating. On the outside printed in blue ink is "CHEMELEX". To the left of that, on both sides are three raised vertical lines. Inside the cable are three evenly spaced copper wires encased in a black plastic. Cable (B) has a blue coati...

    Record Type: Object

    Raychem Heat Cable
  8. Raychem Corporation Auto-Trace Display Samples, 1979 - Cable

    Raychem Corporation Auto-Trace Display Samples, 1979. Single page shows examples of Auto-Trace Self-Limiting Heater cable produced by the Raychem Corporation. Five samples of cable are placed in a clear plastic bag and attached along the left side of the page with metal staples. Text at top left reads, "Auto-Trace / Self-Limiting Heater," and at top right, "Cut to length for simple / on-site installation. / Flexible: Wraps around / valve...

    Record Type: Object

    Raychem Corporation Auto-Trace Display Samples, 1979
  9. Raychem Corporation Product Literature, Application Equipment, early 1960s - February 1982 - Archive

    Raychem Corporation Product Literature, Application Equipment, early 1960s - February 1982. Documents on Raychem Corporation Application Equipment. Document types include booklets, data sheets, and photocopies. Subjects include heaters, installation and operating instructions, and a specification control drawing. Documents are arranged by print date. PDF inventory available in media tab of collections database.

    Record Type: Archive

    Raychem Corporation Product Literature, Application Equipment, early 1960s - February 1982
  10. Raychem Heater Seminar Souvenir, 1980 - Souvenir

    Raychem Heater Seminar Souvenir, 1980. A Plexiglas rectangular souvenir from the March 1980 Raychem Heater Seminar in Palo Alto, CA. Event, place and date are engraved into front at the bottom. Engraved words are filled with white paint. Image of a starship is painted onto the back of the Plexiglas and can be seen through the plastic. The starship is yellow on a black background. The starship has varying mechanical and electrical components. Towa...

    Record Type: Object

    Raychem Heater Seminar Souvenir, March 1980
  11. Raychem XL Trace Cable for Pipe Freeze Protection, c. 1957-1999 - Cable

    Raychem XL Trace Cable for Pipe Freeze Protection, c. 1957-1999. Cable's exterior plastic coating is light blue. Cable is flat. Each end exposes interior. Interior is hard black polymer plastic with two nickel-plated copper wires at each end. One end of black plastic interior protrudes outside blue coating. Inscription printed in black in along outside of cable describes product and includes a warning.

    Record Type: Object

    Raychem XL Trace Cable for Pipe Freeze Protection
  12. Telecom Show Chicago, July 25, 1975 - Photograph, Black-and-White

    Telecom Show Chicago, July 25, 1975. Black and white contact sheet of 4 x 5 film shows three images of the puppet Ray the Raychem Seal with a Raychem Corporation telecom product. Ray appears at the top of each image next to a telephone. A cable leading away from the telephone curves back and forth across the image and connects to a second cable with rectangular hardware at lower right. The images are similar with Ray holding the telephone receive...

    Record Type: Photo

    Telecom Show Chicago, July 25, 1975
  13. Telecom Show Chicago, July 25, 1975 - Photograph, Black-and-White

    Telecom Show Chicago, July 25, 1975. Black and white contact sheet of 4 x 5 film with three images of the puppet Ray the Raychem Seal and Raychem Corporation products. Ray appears at the top of each image with application equipment heaters arranged out in front of him. Several metal clamps and a swivel hook are chained together and rest of a piece of material with large grommets at bottom center. The images are similar with the only change the po...

    Record Type: Photo

    Telecom Show Chicago, July 25, 1975
  14. Untitled [Raychem Desertclad Tape Trial in Alaska] - Transparency, Slide

    Untitled [Raychem Desertclad Tape Trial in Alaska], November 1975. This color slide shows two heaters around a section of unwrapped pipe in a snowy landscape. The heaters are cylindrical and wrap around the exterior of the pipe. The heaters both have black tubing connecting to their sides and a set of metal runners on the underside. Metal loops at top provide a place to attach the units to an overhead metal structure. Desertclad was a product t...

    Record Type: Photo

    Untitled (Raychem Desertclad Tape Trial in Alaska), November 1975
  15. Untitled [Raychem Desertclad Tape Trial in Alaska] - Transparency, Slide

    Untitled [Raychem Desertclad Tape Trial in Alaska], November 1975. This color slide shows a row of heaters around a section of unwrapped pipe in an outdoor setting. The heaters are cylindrical and wrap around the exterior of the pipe with an overhead metal structure to support and move the units along the pipe by crane. A flame from one of the heaters is visible at center. The heaters were fueled by propane and would raise the pipe temperature to...

    Record Type: Photo

    Untitled (Raychem Desertclad Tape Trial in Alaska), November 1975
  16. Zap Gun Award Presented to Paul M. Cook, 1968 - Award

    Zap Gun Award Presented to Paul M. Cook, 1968. Zap Gun (A) and mount (B) are two pieces which can be separated. The gun (A) is the original, first zap gun ever made. The barrel of the gun is brass shaped like an oblong sphere that is tapered at the ends. When trigger is pulled, nose of the barrel opens up to release heat. In the middle of the barrel is a embossed ring around the widest part. The back end has a small circular cutout which exposes...

    Record Type: Object

    Zap Gun Award Presented to Paul M. Cook, 1968

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