Photo Index - J. A. Davidson & Co. - Blade Guard

Machinery Photo Index

Manufactured/Badged by:
J. A. Davidson & Co.
Eau Claire, WI

True Manufacturer:
J. A. Davidson & Co., Eau Claire, WI

Machine Specifications
Machine Class:	Wood Working Machinery
Machine Type:	Jointer
Machine Size:	12" Jointer
Submitted By:	Devon Prescott

Machine Specifications
Description/Model:	Blade Guard
Date of Manufacturer:	early 1900s
Serial Number:
Last Updated	7/26/2012 1:24:34 PM

Comments:

This Guard was found on an early Hall and Brown 12" Jointer that was purchased from a closing Machine Shop in Vinita, OK. My initial assumption was that the device was an aftermarket accessory based on the different branding and the fact that the Guard was attached only on the front of the bed (by the drilling and tapping of two holes). However, it has been theorized that the guard may be original to the machine as other Hall and Brown Jointers have been found similarly equipped.

The Guard is comprised of two main assemblies. The swinging guard itself with company name contains a large tapered flat casting and a large pin - and the mounting assembly that has the patent date on it. The guard assembly has an oval shaped spacer on the pin captured within the mounting assembly. A leaf spring runs inside the body of the mounting assembly hard attached at the small pin seen on the right hand side (near the cast number '16'). This leaf spring presses against the oval spacer and should serve to return the guard into the safe position when it is moved away - act of moving places the thicker portion of the ovoid spacer against the spring and compresses it.

Note: As of 7/26/2012 I still cannot free up the "swing" of the Guard. The device has spent the last two weeks in and out of electrolysis tanks removing rust. I intend to update this information once I get the guard working again.

Note: The guard has 2 breaks: One that has been welded and one that is "newer" near the D in the "GUARD" casting.

Photo 1:

Comments: This blade guard came off a Hall and Brown No. 1 Jointer
Source: D. Prescott

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Photo 2:

Comments: Guard in place as found
Source: D. Prescott

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Photo 3:

Comments: Guard was mounted on face of Jointer - right hand side
Source: D. Prescott

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Photo 4:

Comments: Note 2 bolts that attach Guard.
Source: D. Prescott

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Photo 5:

Comments: A view of the mounting assembly complete with leaf spring and Oval Spacer
Source: D. Prescott

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