Thread Number: 45269  /  Tag: 50s/60s/70s Vacuum Cleaners
Never thought I'd get a Bison Mark 2 vacuum.
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Post# 468905   1/23/2024 at 17:03 (253 days old) by OldCrankman (Lawrenceburg, Indiana)        

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I believe this has all of its attachments and it sounds pretty healthy. Its missing its headlight lens tho..


?si=-V6okczg47NSRwdW


Post# 468910 , Reply# 1   1/23/2024 at 20:29 (253 days old) by Lesinutah (Utah)        
Nice

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I like the green bison. I actually have the attachmen kaddy/box for that vacuum. I don't have a bison buy I love the ds80 and I like the green.

Post# 468915 , Reply# 2   1/24/2024 at 00:59 (253 days old) by tolivac (Greenville,NC)        

I would like to find the brown and a green Bison.The former Bison factory is now home of E1 emergency vehicles-fire trucks and ambulances.

Post# 468916 , Reply# 3   1/24/2024 at 06:58 (253 days old) by OldCrankman (Lawrenceburg, Indiana)        

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I got this for $18. Also, how do you find the date on it, I think mine is from 1972.

Post# 468925 , Reply# 4   1/24/2024 at 18:14 (252 days old) by Paul (USA)        

Congrats - nice piece of '60s & '70s vacuum cleaner styling—and a rare one at that!

Here's a link to the 1968 operating manual for it at Automatic Ephemera: www.automatice.org/cgi-bi...

From what I've read, there were three versions, or marks, of the green Bison: Mark I, Mark II, and Mark III; followed by the Centurion in hammertone brown and a tan bag with a brown windowpane pattern. I'm not sure if there's a code in the serial number, or if something was stamped in the casing.

I found the original 1968 patents by inventors Wilbur-Webb Selley and Richard H. Schaffer (Mark I) along with 1969—detachable handle & movable light, 1970—dirt receptacle, 1973—detachable handle with sliding member (no hardware removable necessary); which may suggest the different versions, or marks. I also found a 1982 article (below) referencing the Centurion. Apparently, the Bison factory in Ocala, Florida was shuttered in 1983; ending the company's 15-year history. Interestingly, it began as Vactronics, Inc. and changed its name to Bison Manufacturing Company in 1971 when it moved from Orlando to Ocala.

Here are the 1968 (filed)/1971 (granted) patents and other noteworthy items I located:


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Post# 468929 , Reply# 5   1/24/2024 at 19:30 (252 days old) by huskyvacs (Gnaw Bone, Indiana)        

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Wow! Great find! You got lucky! I nearly had one in 2017 but I lost the bid by $1! Just $1!


Post# 468936 , Reply# 6   1/24/2024 at 21:42 (252 days old) by OldCrankman (Lawrenceburg, Indiana)        

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I wanted to send Bison photos just because lol.

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Post# 468937 , Reply# 7   1/24/2024 at 21:47 (252 days old) by ajc31980 (Johnstown PA USA)        
Awesome !

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Awesome find ! That’s one I’ve added to my bucket list. I didn’t even know they existed till seeing one posted on FB last year .

Post# 470496 , Reply# 8   4/6/2024 at 16:45 by OldCrankman (Lawrenceburg, Indiana)        

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So when I got my Bison, I didn't know I forgot the attachments that I found at the thrift store today. I'm surprised they're still here. I will sends pics once I get home.

Post# 470506 , Reply# 9   4/6/2024 at 20:44 by Lesinutah (Utah)        
The

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Bison has 10 amp motor. I wonder what the airflow is for it.

Post# 470529 , Reply# 10   4/7/2024 at 14:21 by OldCrankman (Lawrenceburg, Indiana)        
Here's the other stuff for my Bison.

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?si=hmmbdRu9Um-ZKUNR


Post# 470533 , Reply# 11   4/7/2024 at 16:21 by Human (Pines of Carolina)        

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Just watched both of your videos. It's amazing the thrift store held onto that tool kit for two months! Did they just let you have it when you walked in and said you had the vacuum to go with it? You've definitely got yourself one of the true 'unicorns' of the vacuum world. I've never even seen one, except for photos here on Vacuumland.

Post# 472165 , Reply# 12   6/28/2024 at 16:40 by Nova_Candy (New Jersey)        
Bison Mark III

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My 1978ish Mark III, I have the tools and tool caddy, but the hose is from a centurion

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Post# 472168 , Reply# 13   6/28/2024 at 21:53 by Vacuumman (California)        
Bison Rheostat

Nova_Candy, were you ever able to fix the rheostat issue on the Bison or does it still only run at high speed?

Post# 472177 , Reply# 14   6/29/2024 at 06:19 by Nova_Candy (New Jersey)        
Re: Bison Rheostat

nova_candy's profile picture
I need to find a resistor I can replace the open one with as it had failed before I bought it

Post# 472218 , Reply# 15   7/2/2024 at 00:05 by RainbowD4C (Saint Joseph, Michigan )        

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Is it possible to make a video of how to hook up the attachments and how to how up the carpet head after the attachments? I've always wondered about that?

Post# 472222 , Reply# 16   7/2/2024 at 10:57 by OldCrankman (Lawrenceburg, Indiana)        

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Sure.

Post# 472276 , Reply# 17   7/6/2024 at 17:11 by Nova_Candy (New Jersey)        
Bison

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It is intresting that the Mark II power head uses a worm gear drive to the brush roll, and the Mark III is a direct belt to the brush roll

Post# 472291 , Reply# 18   7/8/2024 at 15:37 by huskyvacs (Gnaw Bone, Indiana)        

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I think it's because they found out the gear drive was too complex and costly, and it failed pretty quickly. The gear teeth did not like the resistance once the brushroll was going through thick carpet.

That same problem would come back to haunt the Hoover Windtunnel V2.


Post# 472292 , Reply# 19   7/8/2024 at 16:46 by Nova_Candy (New Jersey)        

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Demonstration of Mark III powerhead and hose



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Post# 472314 , Reply# 20   7/10/2024 at 11:32 by dysonman1 (the county)        

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General Electric made the Bison motor for them. Richard Shaffer was President of Bison. Former V.C.C.C. board member, Clay Floyd, operated a service/repair center for Bison in the early 1970's (1973 to be exact). Mr. Shaffer flew from Florida to Denver to host sales meetings, recruit new salesmen, and generally drove Clay nuts. There was a hedge trimmer attachment shown in the demo books and 'coming soon' and tons of customers used to invade Clay's repair center demanding that attachment which they believed would be delivered by the salesman. No hedge trimmer ever was sold. Only pictured. Lots of angry customers. By the way, Dwane Chapman (the bounty hunter) sold Bisons through Clay's office at the time. Clay referred to his sales tactics as 'unscrupulous'. He pushed Bisons on old ladies, which Clay didn't approve of.

Post# 472325 , Reply# 21   7/10/2024 at 18:04 by Lesinutah (Utah)        
I

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Guess you can't teach an old Dog new tricks. Lol corny joke
With a 10 amp motor theres no wonder they went through bearings like it's nobody's business.


Post# 472326 , Reply# 22   7/10/2024 at 18:08 by Lesinutah (Utah)        
Damn

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If u put your finger over the fan it would be sliced into deli meat in no time.

Post# 472407 , Reply# 23   7/17/2024 at 09:29 by Nova_Candy (New Jersey)        
NIB Bison

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These three just came on Ebay, all Mark II

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